EXHIBIT 10.4

    [Doyon Exploration Option Agreement by and between the Company and Doyon
                   Limited, effective as of January 1, 2002]

<PAGE>

                              AMENDED AND RESTATED
                                OPTION AGREEMENT
                                     between
                                 DOYON, LIMITED
                                       and
                          NORTH STAR EXPLORATION, INC.

                      made effective as of January 1, 2002

<PAGE>

                                Table of Contents

Section                                                                    Page

1.  DEFINITIONS..............................................................3
2.  GRANT OF EXPLORATION RIGHTS AND OPTION TO LEASE.........................10
    2.1      Grant..........................................................10
    2.2      Separate Surface Use Agreements................................10
    2.3      Governmental Permits and Approvals.............................11
    2.4      No Reliance....................................................12
3.  OPTION PAYMENTS.........................................................12
    3.1      Initial Payment and Execution of Equity Participation
             Agreement......................................................12
    3.2      Later Option Payments..........................................12
    3.3      Scholarship Donations..........................................12
4.  EXPLORATION MANAGEMENT AND EXPLORATIONEXPENDITURE COMMITMENTS FOR
    EXHIBIT APROPERTIES AND EXHIBIT B PROPERTIES............................13
    4.1      Exploration Management.........................................13
    4.2      Mandatory Expenditures.........................................13
    4.3      Exploration Program and Budget.................................14
    4.4      Sampling.......................................................14
    4.5      Guarantee of Exploration Expenditures..........................14
5.  EXERCISE OF OPTION AND EXECUTION OF LEASE...............................15
    5.1      Prefeasibility Study; Designated Areas.........................15
    5.2      Request for Conveyance and Execution of Lease..................16
6.  CONDUCT OF OPERATIONS...................................................16
    6.1      Operational Standards and Compliance with Laws.................16
    6.2      Condition of Sites and Facilities; Reclamation Bond............17
    6.3      Archaeological and Cultural Resources Clearances...............17
    6.4      Notice of Non-Responsibility...................................18
    6.5      Liens and Encumbrances.........................................18
    6.6      Taxes..........................................................18
    6.7      Insurance......................................................19
    6.8      Indemnification................................................19
    6.9      Coordination of Surface Uses; Reservation by Doyon of
             Alluvial  Placer GoldOccurrences...............................19
    6.10     No Hunting, Fishing and Trapping; No Consumption of
             Alcoholic Beverages............................................20
    6.11     Doyon's Liability Limitations..................................20
    6.12     Federal or State Mining Claims.................................20
7.  CONTRACTING AND HIRING PREFERENCES......................................21
    7.1      Contracting Preference.........................................21
    7.2      Hiring Preference..............................................21
    7.3      No Violation of Laws...........................................22
8.  INFORMATION AND REPORTS.................................................22
    8.1      Information....................................................22
    8.2      Reports........................................................23
9.  ACCESS TO THE PROPERTY AND SAMPLING BY DOYON............................26
    9.1      Entry..........................................................26


                                       i

<PAGE>

    9.2      Sampling.......................................................26
10. RELEASES AND CONVEYANCES OF PROPERTY....................................26
    10.1     Releases of Property by North Star; Annual Prioritization......26
    10.2     Release or Conveyance of Property in the Event of a BLM
             Requested Selection Reduction..................................27
    10.3     Notice of Selection Status.....................................28
11. TITLE...................................................................28
    11.1     Representations and Warranties.................................28
    11.2     Land Records...................................................29
    11.3     Title Curative Measures........................................29
12. NO REPRESENTATIONS CONCERNING CONDITION OF LAND.........................29
13. ACQUISITIONS WITHIN  EXPENDITURE AREA...................................29
    13.1     Acquisition by Doyon...........................................29
    13.2     Acquisition by North Star......................................29
    13.3     Other Agreements...............................................31
    13.4     Survival of Expenditure Area; 1997 Option Agreement............31
14. DEFAULT; TERMINATION OR ABANDONMENT OF PROPERTY.........................32
    14.1     Default........................................................32
    14.2     Abandonment....................................................32
    14.3     Termination....................................................32
15. FORCE MAJEURE...........................................................33
16. ASSIGNMENT AND SUBLEASE.................................................33
17. CONFIDENTIALITY.........................................................35
    17.1     General........................................................35
    17.2     Disclosures During Term of Agreement...........................35
    17.3     Disclosures After Expiration or Termination of Agreement.......36
    17.4     Exceptions To Consent Requirements.............................37
    17.5     Use of Doyon Logo and Name.....................................37
18. GENERAL PROVISIONS......................................................38
    18.1     Notice.........................................................38
    18.2     Governing Law..................................................39
    18.3     Arbitration....................................................39
    18.4     Entire Agreement...............................................40
    18.5     Binding Effect.................................................40
    18.6     Amendments and Waiver..........................................40
    18.7     Execution in Counterparts and by Facsimile.....................40
    18.8     Headings.......................................................41
    18.9     Time of Essence................................................41
    18.10    Currency.......................................................41
    18.11    Further Assurances.............................................41
    18.12    Rule Against Perpetuities......................................41
    18.13    Conflicts Between Exhibits and Schedules.......................42


                                       ii
<PAGE>

                                   Attachments

EXHIBITS (Including Maps)
         A-1  Northway Village Block and Area of Interest
         A-2  Takotna Village Block and Area of Interest
         A-3  Highway Village Block (Healy Lake, Dot Lake and Tanacross) and
              Area of Interest
         A-4  Minto Village Block and Area of Interest
         A-5  Yukon Group Block (E. Tanana, Manley (Tofty) Township, Aloha and
              Tofty State Claims) and Area of Interest
         B    Form of Conveyance of Overriding Royalty
         C    Third Party Property Working Interest Elections
         D    Form of Mining Lease
         E    Amended and Restated Equity Participation Agreement

SCHEDULES
         A-1  Northway Village Block
         A-2  Takotna Village Block
         A-3  Highway Village Block (Healy Lake, Dot Lake and Tanacross) and
              Area of Interest
         A-4  Minto Village Block
         A-5  Yukon Group Block (E. Tanana, Manley (Tofty) Township, Aloha and
              Tofty State Claims) and Area of Interest


                                      iii
<PAGE>

                      AMENDED AND RESTATED OPTION AGREEMENT

      THIS OPTION AGREEMENT ("this Agreement"), is made effective as of January
1, 2002, regardless of the dates upon which it actually is executed by the
parties hereto, between

            DOYON, LIMITED ("Doyon"), an Alaska corporation, optionor,

            and

            NORTH STAR EXPLORATION, INC. ("North Star"), a Nevada corporation,
optionee.

      A. WHEREAS, pursuant to the Alaska Native Claims Settlement Act, 43
U.S.C.ss. 1601 et seq., as amended ("ANCSA"), Doyon and the Villages (as defined
below) have selected certain lands depicted on the maps attached hereto as
Exhibits A-1 through A-5 ("the Maps") (said lands are also described in
Schedules A-1 through A-5 attached hereto); and

      B. WHEREAS, pursuant to ANCSA, (1) Doyon has received from the United
States, through the Bureau of Land Management (the "BLM"), conveyances of both
the surface estate and the subsurface estate in and to portions of said lands ,
(2) Doyon reasonably believes that it has the right to receive from the United
States, through the BLM, conveyances of both the surface estate and the
subsurface estate in and to additional portions (but substantially less than
all) of said lands, all of which conveyances have been or will be subject to
certain Permitted Exceptions (as defined below), (3) Doyon reasonably believes
that the Villages have received or have the right to receive conveyance from the
United States, through the BLM, of the surface estate in and to some of said
lands, and (4) Doyon has received or reasonably believes that it has the right
to receive conveyance from the United States, through the BLM, of the subsurface
estate in and to the lands in which the Villages receive conveyance of the
surface estate; and

      C. WHEREAS, pursuant to ANCSA, Doyon has selected lands within the State
of Alaska other than the Doyon Property (as defined herein) depicted on the Maps
for possible conveyance and these other selected lands together with the Doyon
Property (as defined herein) depicted on the Maps that it has selected exceed
the total acreage allowed to Doyon under ANCSA, such that from time to time the
BLM may require Doyon to identify portions of either those of the lands depicted
on the Maps that it has selected but that have not yet been conveyed to it or
the other selected lands, or both, that Doyon either does or does not desire to
receive and either to take conveyances of certain lands (limited in amount to
the remaining entitlements granted Doyon under ANCSA) or to release certain
lands from the lands selected under ANCSA for conveyance to Doyon, or both; and

      D. WHEREAS, North Star acknowledges that (1) Doyon has no legal ability to
direct a Village to request that the BLM convey to that Village and Doyon any
particular lands that have been selected by the Village but not yet conveyed,
(2) certain lands that are or will be conveyed to a Village and Doyon may be
subject to the restrictions on mineral activities set forth


                                       1
<PAGE>

in section 14(f) of ANCSA, and (3) it has been advised by Doyon and understands
that certain of the Villages have over-selected the amount of their entitlement
under ANCSA with the result that Doyon will not be entitled to conveyance of
that portion of the mineral estate in the Village Property where the Villages
have over-selected land; and

      E. WHEREAS, although Doyon generally has not yet requested that the BLM
convey to Doyon any of the lands depicted on the Maps that have been selected
but have not yet been conveyed, based on Doyon's past experience in allowing
other mineral development companies to explore selected lands, Doyon reasonably
believes as follows: (1) The BLM will permit North Star, by and through Doyon,
to have helicopter and other limited access to lands managed by the BLM and the
BLM will grant the right to establish exploration camps for the purpose of
conducting geological, geochemical, and geophysical surveys, low impact
sampling, and limited drilling and test pit programs; (2) the National Park
Service and the United States Fish and Wildlife Service may, on an ad hoc basis,
permit North Star, by and through Doyon, to have limited helicopter and other
access to lands respectively managed by the National Park Service and the United
States Fish and Wildlife Service, and to conduct limited geological,
geochemical, and geophysical surveys and other limited exploration activities;
and (3) if Doyon requests conveyance of any of the lands depicted on the Maps
that have been selected by it, such lands will be conveyed to it by the BLM via
interim conveyance or patent, subject to certain Permitted Exceptions (as
defined below), and any such interim conveyance or patent will enable Doyon to
enter into a mineral lease with North Star for such lands to allow North Star to
proceed with exploration for, development of, and production of certain minerals
from such lands, if North Star otherwise is entitled to exercise its option to
receive a lease as to such lands under the terms of this Agreement; and

      F. WHEREAS, North Star desires to conduct exploration for such minerals
not only on those of the lands depicted on the Maps that have been selected by
or conveyed to Doyon or a Village but also on certain lands surrounded by or
adjoining such selected or conveyed lands, and the parties desire to identify
those portions of the Doyon Property (as defined herein) which appear most
promising for mineral production so that (1) North Star can both exercise its
option to lease certain portions of said lands pursuant to this Agreement and
release from this Agreement certain other portions of said lands that do not
appear valuable for minerals, and (2) Doyon can from time to time request of the
BLM conveyances of portions of said lands or release from its selections
portions of said lands, or both, in accordance with the provisions of this
Agreement; and

      G. WHEREAS, Doyon has agreed to grant to North Star the right to conduct
mineral exploration activities on the Doyon Property depicted on the Maps to the
extent Doyon has the power and authority to do so and has agreed to grant to
North Star the option to lease portions thereof subject to the terms and
conditions set forth in this Agreement, and

      H. WHEREAS, Doyon and North Star previously entered into an Option
Agreement, dated May 27, 1997 (the "1997 Option Agreement"), pursuant to which
Doyon granted to North Star certain rights in certain properties in the State of
Alaska, some of which included the properties subject to this Agreement; and


                                       2
<PAGE>

      I. WHEREAS, Doyon and North Star wish to enter into this Agreement for the
purpose and with the intent of amending, replacing and superceding the 1997
Option Agreement in its entirety;

      NOW THEREFORE, in consideration of the mutual covenants and agreements
herein contained, the receipt and adequacy of which are hereby acknowledged, the
parties hereto agree as follows:

1. DEFINITIONS

      As used in this Agreement, unless the context otherwise requires, the
following terms have the following meanings:

      1.1 "Affiliate" means a person, partnership (limited, general or
otherwise), limited liability company, joint venture, corporation, or other
entity or form of enterprise which, whether through equity ownership or through
contractual obligations: (i) can control, either directly or indirectly, or be
controlled by a party hereto, or such party's successors or assigns, or (ii) is
under the common control, with a party hereto, or such party's successors or
assigns, directly or indirectly, of a third person or other entity.

      1.2 "Alluvial Placer Gold Occurrences" means those gold occurrences which
have resulted from the operation of rivers and streams including the sediments
laid down in river and stream beds, flood plains, lakes, fans at the foot of
mountain slopes, and estuaries and which can be developed through use of
traditional placer mining techniques employing screening and trapping by use of
gravity separation only; if minerals need to be crushed or otherwise processed
prior to gravity separation, those materials and the gold found therein are not
alluvial placers.

      1.3 "Area of Interest" means, with respect to the lands and interests
depicted on any one of Exhibits A-1 through A-5, inclusive, attached hereto, (i)
all interests in real property (other than Doyon Property) within the areas
depicted on such Exhibit as being within a Block plus (ii) all interests in real
property within the areas depicted on such Exhibit as being within the adjoining
area, designated on such Exhibit as the "Area of Interest."

      1.4 "BLM Requested Selection Reduction" means a request to Doyon from the
BLM to relinquish Doyon's ANCSA selection to a portion of the Doyon Selected
Property.

      1.5 "Block" means, with respect to the lands and interests depicted on any
one of Exhibits A-1 through A-5, inclusive, attached hereto, all of the Doyon
Property within the areas depicted on such Exhibits as being subject to this
Agreement. Each of Exhibits A-1 through A-5, inclusive, attached hereto thus
depicts, inter alia, a separate and distinct Block of Doyon Property, with their
associated Areas of Interests and Buffer Zones as follows:


                                       3
<PAGE>

         Exhibit A-1 shows the Northway Village Block
         Exhibit A-2 shows the Takotna Village Block
         Exhibit A-3 shows the Highway Village Block (Healy Lake, Dot Lake and
                 Tanacross) and Area of Interest
         Exhibit A-4 shows the Minto Village Block
         Exhibit A-5 shows the Yukon Group Block (E. Tanana, Manley (Tofty)
                 Township, Aloha and Tofty State Claims)

For the sake of clarity the Doyon Property constituting each of the Blocks is
further described on Schedules A-1, A-2, A-3, A-4 and A-5 attached hereto, as
follows:

         Schedule A-1:  Northway Village Block
         Schedule A-2:  Takotna Village Block
         Schedule A-3:  Highway Village Block (Healy Lake, Dot Lake and
                        Tanacross B and Tanacross A)
         Schedule A-4:  Minto Village Block
         Schedule A-5:  Yukon Group Block (E. Tanana, Manley (Tofty) Township,
                        Aloha and Tofty State Claims)

      1.6 "Buffer Zone" means with respect to the lands and interests depicted
on any one of Exhibits A-1 through A-5, inclusive, attached hereto, (i) all
interests in real property (other than Doyon Property or Area of Interest)
within the areas depicted on such Exhibit as being within a Block, plus (ii) all
interests in real property within the areas depicted on such Exhibit as being
within the adjoining area designated on such Exhibit as the "Buffer Zone."

      1.7 "Commercial Production" means mineral production operations extracting
at least 300 tons of Ore per day from the Premises, on average, for a continuous
period of six (6) months, subject to periods of Force Majeure or periods in
which operations of that type are suspended due to normal weather conditions.
Any operation mining less than an average of 300 tons of Ore per day during a
continuous period of less than six (6) months shall not, for the purposes of
this Agreement, be regarded as capable of Commercial Production unless the
results of the appropriate Feasibility Study indicate that an average of less
than 300 tons of Ore per day is a viable level of full capacity production,
whereupon the parties agree to discuss in good faith an alternative minimum
tonnage requirement, and Doyon's consent to such an alternate minimum tonnage
requirement may not be unreasonably withheld.

      1.8 "Designated Area" means the number of acres and tract configuration
which should be included in a Mining Lease in order to exploit fully and
efficiently the Mineral deposit(s) associated with a Prospect.

      1.9 "Doyon Conveyed Property" means those real property interests within
the Expenditure Area that, as of the date of this Agreement or from time to time
in the future, are conveyed to Doyon pursuant to ANCSA either by interim
conveyance or by patent. Doyon


                                       4
<PAGE>

Conveyed Property generally includes the subsurface estate in and to particular
lands; in some cases, Doyon Conveyed Property also includes the surface estate
in and to particular lands.

      1.10 "Doyon Property" means all Doyon Selected Property, all Doyon
Conveyed Property, all Village Conveyed Subsurface, and any real property
interests acquired by Doyon pursuant to Section 13.1 of this Agreement.

      1.11 "Doyon Selected Property" means those real property interests within
the Expenditure Area that are selected by Doyon pursuant to ANCSA but which have
not yet been conveyed to Doyon. Doyon Selected Property generally includes both
the surface estate and the subsurface estate in and to particular lands; in some
cases, Doyon Selected Property includes only the subsurface estate in and to
particular lands.

      1.12 "Exhibit A Properties" means the Doyon Property referred to and
depicted on Exhibits A-1 through A-5 at any time.

      1.13 "Expenditure Area" means all of the lands within each Block plus all
of the lands within each Block's associated Area of Interest, but not lands
within a Block's Buffer Zone. For purposes of convenience each Block's
Expenditure Area shall be designated as the "_________ Block Expenditure Area,"
such as the "Northway Village Block Expenditure Area."

      1.14 "Exploration Expenditures" means all actual, direct expenditures
incurred after the date of this Agreement made by or on behalf of North Star on
the Exhibit A Properties in ascertaining the existence, location, quantity,
quality, or commercial value of deposits of Minerals within the Expenditure
Area. Without limiting the generality of the foregoing, Exploration Expenditures
shall include the following:

      (a)   a pro rata share (allocated on an hourly basis) of the salaries of
            (i) North Star's Denver office staff and (ii) North Star's
            geologists, landmen and technical employees, while either group is
            working on or for the direct benefit of the Exhibit A Properties,
            including but not limited to the costs of providing reports and
            samples to Doyon and attending any meetings required under this
            Agreement, but in the case of items (i) and (ii) in an amount not to
            exceed $200,000 in the aggregate in any Option Year;

      (b)   the costs of (i) staking, filing and recording federal mining claims
            and state prospecting sites within the Expenditure Area and (ii) the
            cost of paying any Maintenance Fees, but in the case of items (i)
            and (ii), not to exceed the amount of $35,000 in the aggregate in
            any Option Year;

      (c)   the costs of any reclamation bond for operations on Doyon Property;
            and

      (d)   the costs of all archaeological and cultural resources surveys.


                                       5
<PAGE>

Notwithstanding the foregoing, for all Option Years Exploration Expenditures
shall not include (a) payments made by North Star to Doyon pursuant to Section 3
below, (b) any costs associated with raising or managing equity capital, (c)
other than as provided above, any costs incurred in acquiring Third Party
Property within the Expenditure Area, (d) any payments made by North Star to
third parties (in cash, services, or anything else of value) pursuant to
agreements entered into with said third parties to acquire Third Party Property
within the Expenditure Area, or (e) any salaries or benefits of officers of
North Star, except for the salary (and not the benefits) of the officer of North
Star whose primary responsibility is geologic evaluation of the Doyon Property
and management of operations to be performed by North Star under this Agreement.

      1.15 "Feasibility Study" means a written report prepared by an independent
mining consultant selected by North Star and approved by Doyon (whose approval
shall not be unreasonably withheld) setting forth in detail an analysis of the
economic and commercial viability of conducting operations for the production
and sale of Mineral Products from a Mine in a Designated Area that recommends
that all or part of the Designated Area should be brought into Commercial
Production. It shall also describe in detail the method by which Commercial
Production should be achieved and continued, including, where applicable,
reasonably anticipated exploration costs which a joint venture formed hereunder
would undertake to identify and quantify new mining reserves in the Designated
Area and shall also contain an analysis of applicable environmental and
reclamation laws and an estimate of the cost of complying with such laws. Such
report shall be in such form as is ordinarily necessary to satisfy substantial
international financing institutions for the purpose of determining the
advisability of providing project financing on a commercially competitive basis
taking into consideration all relevant criteria deemed to be both normal and
prudent for the mining industry in the United States. During the preparation of
any Feasibility Study, North Star shall make available to Doyon for review all
drafts of the Feasibility Study as they become available to North Star together
with all data upon which the Feasibility Study or drafts are based; provided,
however, nothing herein contained shall be deemed to give Doyon any right of
approval with respect to such drafts. Upon reasonable notice Doyon shall be
invited to attend all formal project review meetings between the consultant and
North Star held in connection with the preparation of any Feasibility Study.

      1.16 "Maintenance Fees" means all state and federal mining claim rental
fees, mining claim maintenance payments and similar payments required by law to
hold federal unpatented mining claims and state mining claims and prospecting
sites.

      1.17 "Mine" means one or more open pits, underground workings, in situ
operations, and processing facilities within a single Designated Area if such
open pits, underground workings, in situ operations, and processing facilities
are physically interrelated or for economic reasons should logically be
developed in conjunction with one another.

      1.18 "Mineral(s)" means all substances (whether metallic or non-metallic)
occurring naturally in the earth but excluding Other Minerals.


                                       6
<PAGE>

      1.19 "Mineral Products" means all Ores produced from the Premises which
are sold, processed, or refined for their Mineral content and all products
derived from such processing or refining including, without limitation, dore
bullion, precipitates, and concentrates of Minerals.

      1.20 "Mining Lease" means any mining lease entered into pursuant to this
Agreement using the form attached hereto as Exhibit D, as modified by the
revisions contained in Exhibit D-1, with such further changes, if any, as may be
agreed upon by Doyon and North Star as necessary and reasonable.

      1.21 "Native Corporation" has that meaning given in ANCSA.

      1.22 "Native" has that meaning given in ANCSA.

      1.23 "Option" means the option rights granted in Section 2.1(c) of this
Agreement.

      1.24 "Option Period" means the period commencing on the date of this
Agreement and ending at 11:59 p.m. P.S.T. on December 31, 2004, during which
period North Star may exercise the Option.

      1.25 "Option Year" means any year during the Option Period commencing at
12:01 a.m. on January 1 and ending at midnight A.S.T. on the following December
31, with the effect that during the term of this Agreement there shall exist the
possibility for three option years commencing January 1, 2002, January 1, 2003
and January 1, 2004, respectively.

      1.26 "Ore" means all material produced from the Premises that contains one
or more Minerals and which in the sole discretion of North Star justifies either
(i) mining, extracting, or recovering from a place in the Premises and selling
or delivering to a processing plant or refiner for physical or chemical
treatment, or (ii) treating in situ in the Premises by chemical, solution, or
other methods; said term shall also include all Mineral-bearing solutions,
natural or introduced, recovered by or for North Star from the Premises and
sold, processed, or refined by or for North Star, and all Mineral and
non-Mineral components of all such materials and solutions.

      1.27 "Other Minerals" means all Alluvial Placer Gold Occurrences,
geothermal resources, sand, gravel, shot rock, aggregate, rock, building stone,
limestone, peat, coal, lignite, oil, gas, other liquid or gaseous hydrocarbons,
and all other substances occurring and producible naturally only as gases,
liquids, or fluids from wells.

      1.28 "Permitted Exceptions" means such (i) reservations, exceptions,
exclusions, restrictions, and limitations as may be included in interim
conveyances or patents issued to Doyon or a Village for property within the
Expenditure Area pursuant to ANCSA, including but not limited to the following:
valid existing rights (including but not limited to unpatented mining claims);
reserved areas set aside by law, executive order, public land order, or similar
action; cemetery and historic sites; air navigation sites; public land entries;
Native allotments; lands underlying inland navigable waters, tidal waters, or
coastal waters; and public easements; and (ii)


                                       7
<PAGE>

with respect to the State Mining Claims, the paramount title of the State of
Alaska. (Some Permitted Exceptions constitute Third Party Property.)

      1.29 "Positive Prefeasibility Study" means a written study for a Prospect
prepared by an independent mining consultant selected by North Star and approved
by Doyon (whose approval shall not be unreasonably withheld) containing (1) an
analysis of the possible economic viability of conducting commercial operations
for the production, marketing, and sale of one or more Mineral Products from a
Mine, (2) an analysis of the possible market for Mineral Products that may be
produced from said Mine, (3) a discussion of the possible methods by which
Commercial Production of Mineral Products may be achieved from said Mine, (4) a
description of the possibly applicable environmental issues associated with the
operation and reclamation of said Mine, including applicable environmental and
reclamation laws, (5) a description of the recommended Designated Area for the
prospect, including if applicable any Village Property, (6) an analysis of the
land status of all lands within the Designated Area and possible impacts of such
land status on the development and operation of said Mine, and (7) a
recommendation, based upon drilling (except in cases of governmental prohibition
on drilling) and limited metallurgical testing evidencing (in conjunction with
such other testing and information as may be available) the possible continuity
and grade of the mineralization on the Prospect, that continued focused
exploration or development work be conducted on the Designated Area to determine
whether all or a part of the Prospect can be brought into Commercial Production.
The parties further acknowledge and agree that a Positive Prefeasibility Study
will be used solely for the purpose of determining whether a Mining Lease should
be entered into for a particular Prospect and that a Positive Prefeasibility
Study will be adequate for this purpose if a reasonably prudent person familiar
with the mining industry in North America would read such study and conclude
that additional work should be performed in the Designated Area with the
expectation that such additional work might reasonably lead to the development
of a paying Mine within the Designated Area. The parties acknowledge that a
Positive Prefeasibility Study cannot and will not be as rigorous or detailed as
a full Feasibility Study. During the preparation of any Positive Prefeasibility
Study, North Star shall make available to Doyon for review all drafts of the
Positive Prefeasibility Study as they become available to North Star together
with all data upon which the Positive Prefeasibility Study or drafts are based;
provided, however, nothing herein contained shall be deemed to give Doyon any
right of approval with respect to such drafts. Upon reasonable notice Doyon
shall be invited to attend all formal project review meetings between the
consultant and North Star held in connection with the preparation of any
Positive Prefeasibility Study.

      1.30 "Premises" means such Doyon Property as may be included in a Mining
Lease.

      1.31 "Prioritization Lists" has the meaning set forth in Section 8.2(b).

      1.32 "Prospect" means an area of land within a Block containing
mineralization that may be capable of development into a Mine.


                                       8
<PAGE>

      1.33 "Reserved Interest" means an overriding royalty, a production
payment, a royalty or any other form of interest that does not bear its
proportionate share of the obligations and liabilities of the cost of
production.

      1.34 "Royalty" means the overriding royalty in the amount and at the rate
described in Exhibit B (Conveyance of Overriding Royalty) attached hereto and
forming a part hereof.

      1.35 "Sale or Distribution to the Public" means a sale pursuant to a bona
fide public offering, as a result of which members of the public become the
holders, directly or indirectly, of an interest in the Option Agreement, one or
more Mining Leases and/or one or more acquired Third Party Properties referred
to therein. Such transactions shall include, besides actual sales of shares of
North Star to the public, so-called "reverse takeovers," "spin-offs" and similar
transactions in which interests in the Option Agreement, one or more Mining
Leases and/or one or more acquired Third Party Properties become an asset of a
publicly held company in exchange for shares thereof through a corporate merger
or other form of transaction.

      1.36 "State Mining Claims" means State of Alaska mining claims or
prospecting sites and the right to convert those State of Alaska mining claims
or sites to a mining lease pursuant to Alaska law.

      1.37 "Third Party Property" means those interests in real property,
including State Mining Claims and federal mining claims, within the Expenditure
Area or within a Buffer Zone to that Expenditure Area, as defined in this
Agreement, or within any Expenditure Area as defined in the 1997 Option
Agreement that are neither Doyon Property nor Village Property.

      1.38 "Village(s)" means an Alaska Native village corporation established
for a Native village on lands within the Doyon Property, including any successor
in interest to such village corporation.

      1.39 "Village Conveyed Surface" means the surface estate in and to
particular lands within the Expenditure Area that, as of the date of this
Agreement or from time to time in the future, is conveyed to a Village pursuant
to ANCSA either by interim conveyance or by patent.

      1.40 "Village Conveyed Subsurface" means the subsurface estate in and to
particular lands within the Expenditure Area that, as of the date of this
Agreement or from time to time in the future, is conveyed to Doyon pursuant to
section 14(f) of ANCSA either by interim conveyance or by patent.

      1.41 "Village Property" means all Village Selected Surface and all Village
Conveyed Surface.

      1.42 "Village Selected Surface" means the surface estate in and to
particular lands within the Expenditure Area that is selected by the Village
pursuant to ANCSA but which has not yet been conveyed to the Village.


                                       9
<PAGE>

      1.43 "Working Interest" means a working interest elected by Doyon pursuant
to either Section 13.2(b) or Section 13.2(c) in accordance with and as further
defined in Exhibit C attached hereto and forming a part hereof.

2. GRANT OF EXPLORATION RIGHTS AND OPTION TO LEASE

      2.1 Grant. With respect to the Doyon Conveyed Property and the Village
Conveyed Subsurface (including such Doyon Conveyed Property and Village Conveyed
Subsurface as may be acquired by Doyon after the date hereof), and for the Doyon
Selected Property to the extent Doyon has the power and authority to do so, and
subject to the rights of termination as provided herein, to the release rights
and obligations of Section 10 and to Permitted Exceptions, Doyon hereby grants
to North Star the following, for and during the Option Period:

      (a)   the nonexclusive right to use the surface of the Doyon Property to
            the extent such surface or the right to use such surface is owned or
            held by Doyon, subject to Doyon's right to review and approve the
            choice of surface locations for access routes and other surface
            facilities and place reasonable restrictions thereon, all in
            furtherance of activities undertaken pursuant to this Agreement;

      (b)   subject to the provisions of Section 2.2, the sole and exclusive
            right to explore the Doyon Property for Minerals by conducting
            geological, geochemical, and geophysical activities and taking
            samples (including drilling), if and to the extent permitted by the
            BLM or other governmental agency with jurisdiction over the affected
            portion of the Doyon Property prior to interim conveyance or patent;

      (c)   the sole and exclusive Option, exercisable, upon giving written
            notice of exercise to Doyon, at any time and from time to time
            during the Option Period, to lease portions of the Doyon Property
            pursuant to the leasing procedure described in this Agreement;

      (d)   the exclusive right to use on the Doyon Property at no cost such
            sand, gravel, shot rock, aggregate, rock, and other materials as may
            exist on Doyon Property, all in furtherance of activities undertaken
            pursuant to this Agreement.

      2.2 Separate Surface Use Agreements. North Star acknowledges and agrees as
follows: (i) the Village owns or controls the Village Property; (ii) certain
Third Party Property is owned by individuals who are Natives or descendants of
Natives (or is owned by the U.S. on behalf of Natives) in the form of Native
allotments or pursuant to other federal laws granting land title to individual
Natives from public lands; and (iii) such Third Party Property may include
rights to some or all Minerals. Doyon acknowledges its obligation under Section
8.1(a) of this Agreement to provide information to North Star about Village,
Third Party, and Native interests. Whether pursuant to this Agreement or any
Mining Lease granted hereunder, North Star shall not enter upon any Village
Property or any Third Party Property that is owned by individuals who are
Natives or descendants of Natives (or is owned by the U.S. on behalf of Natives
in the form of Native allotments or pursuant to other federal laws granting land
title to individual


                                       10
<PAGE>

Natives from public lands), except to the extent of any public rights of access,
until North Star has executed an agreement with all persons or entities that own
or control such Village Property or such Third Party Property. Moreover, North
Star agrees that it shall notify Doyon's Vice-President of Land and Natural
Resources at least 20 days prior to the date it intends to make an initial
contact with a Village or a Native owner of a Third Party Property regarding the
obtaining of a surface use agreement. When North Star's rights regarding a
parcel of land under this Agreement or any Mining Lease granted hereunder are
released, have expired, or otherwise terminate and such parcel is subject to a
surface use agreement with the Village, North Star shall relinquish all rights
under that surface use agreement. North Star shall provide promptly to Doyon a
copy of any surface use agreement entered into by North Star with a Village, a
Native or a descendent of a Native. As of the date of this Agreement, North Star
has entered into one Surface Use Agreement being that certain Surface Use
License, dated April 27, 2001 between North Star and Northway Natives, Inc., a
copy of which Agreement has been provided to Doyon by North Star.

      2.3 Governmental Permits and Approvals. Doyon shall, upon request by North
Star, make reasonable efforts to assist North Star in obtaining such permits and
approvals (including, in particular, special use permits and water rights
permits) from the BLM or other governmental agencies with jurisdiction over the
Doyon Property and, to the extent required by law or regulation, Doyon shall
join in all applications for such permits or approvals as are reasonably
necessary for the exploration activities contemplated by this Agreement. In all
cases, North Star shall be responsible for preparing all such applications.
Doyon shall have the right to review such applications, as well as amendments
thereto, before they are submitted and to require reasonable revisions, and
North Star agrees it shall timely provide to Doyon before submission to the
regulatory agencies copies of proposed applications and amendments to facilitate
Doyon's review. Doyon shall cooperate fully with North Star in seeking permits
and approvals, including during the appeal of any denials or unreasonable
conditions, as requested in good faith by North Star; provided North Star shall
reimburse Doyon for any costs or expenses incurred by Doyon; and provided
further Doyon shall have no obligation to participate on North Star's behalf in
any jurisdictional challenges or disputes regarding permitting or approvals or
in permit or approval disputes which are based upon cultural resource issues.
Permits and approvals shall be issued to and in the name of North Star except
that any water rights permits appurtenant to the Doyon Property or the Village
Property shall be issued in the name of Doyon, and Doyon shall allow use of such
water rights by North Star. North Star shall keep Doyon advised of all
communications with regulatory agencies concerning the activities contemplated
under this Agreement and shall invite Doyon, at Doyon's expense, to attend and
participate in all meetings with regulatory authorities and vice versa. All
fees, rentals, or other payments, if any, necessary for issuance of such permits
and approvals shall be paid by North Star. No amendments to the terms of any
permit or approval shall be sought by North Star without prior consultation with
Doyon and without the prior written consent of Doyon, which consent shall not be
withheld unreasonably except in those situations where significant cultural
resources are potentially impacted. North Star promptly shall provide Doyon with
copies of all permits and approvals obtained by North Star.


                                       11
<PAGE>

      2.4 No Reliance. Each of the parties to this Agreement represents to the
other that in negotiating and entering into this Agreement, it has relied solely
on its own appraisals and estimates as to the value of the Doyon Property and
upon its own geologic and engineering interpretations related thereto, including
the work and studies performed by North Star pursuant to the 1997 Option
Agreement. North Star acknowledges that for the purposes of its appraisals and
evaluations it has additionally specifically relied upon advice and counsel
received by it from the consulting firm of Pincock Allen & Holt which it hired
for the purpose of evaluating the Doyon Property prior to North Star entering
into the 1997 Option Agreement.

3. OPTION PAYMENTS

      3.1 Initial Payment and Execution of Equity Participation Agreement..
Simultaneous with the execution of this Agreement, North Star shall (a) pay to
Doyon an initial option payment of $225,000, and (b) execute and deliver, and
cause to be executed and delivered, that certain Amended and Restated Equity
Participation Agreement in the form of Exhibit E attached hereto and made a part
hereof.

      3.2 Later Option Payments. On or before April 1, 2003 (if this Agreement
is in effect on said April 1, 2003, but not otherwise), and on or before April
1, 2004 (if this Agreement is in effect on said April 1, 2004 but not
otherwise), North Star shall pay to Doyon the following option payments:

      If, as of the respective April 1 date, North Star has retained the
following number of Blocks, it shall make the following payments to Doyon:

                     5 Blocks                           $225,000
                     4 Blocks                           $175,000
                     3 or fewer Blocks                  $150,000.

      3.3 Scholarship Donations. North Star agrees that, simultaneously with the
execution of this Agreement and on each April 1 thereafter during the Option
Period (if this Agreement is in effect on each said April 1 but not otherwise),
North Star shall contribute to the Doyon Foundation, or as otherwise directed by
the President of Doyon, for scholarships to educate Doyon shareholders and their
direct descendants in the fields of natural resources development and land
management, the sum of $20,000. North Star shall have no responsibility to
determine the eligibility of the persons receiving scholarships.


                                       12
<PAGE>

4. EXPLORATION MANAGEMENT AND EXPLORATION EXPENDITURE COMMITMENTS FOR EXHIBIT A
   PROPERTIES

      4.1 Exploration Management. If North Star elects to subcontract all or a
substantial portion of the management of its exploration activities under this
Agreement, North Star shall first obtain the consent of Doyon to the proposed
subcontractor North Star desires to use as the manager of its exploration
activities. North Star shall provide Doyon with a copy of all agreements
(including amendments thereto) between North Star and any manager pertaining in
whole or in part to the Expenditure Area. In the event that any manager, to
which appointment Doyon has consented, for whatever reason is unable to continue
as manager or it is determined that such manager must be replaced, North Star
will seek Doyon's consent to the naming of a successor manager, which consent
shall not be unreasonably withheld. North Star and Doyon recognize that a joint
venture partner may require that it act as manager.

      4.2 Mandatory Expenditures. North Star agrees to make mandatory minimum
Exploration Expenditures as set forth below. The obligation to make Exploration
Expenditures for any Option Year accrues on the first day of that Option Year
and not before.

      (a)

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------
(i) Allocated Exploration Expenditures
----------------------------------------------------------------------------------------------------------------------
           Block and Area of Interest                                         Option Year
----------------------------------------------------------------------------------------------------------------------
                                                             2002                 2003                    2004
----------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>                   <C>                     <C>
Northway Village                                           $390,000              $110,000                $350,000
----------------------------------------------------------------------------------------------------------------------
Takotna Village                                             $90,000                     0                $170,000
----------------------------------------------------------------------------------------------------------------------
Highway Village                                             $60,000                     0                $150,000
----------------------------------------------------------------------------------------------------------------------
Yukon Group                                                $130,000               $20,000                $150,000
----------------------------------------------------------------------------------------------------------------------
Minto Village                                               $10,000               $65,000                 $75,000
----------------------------------------------------------------------------------------------------------------------
(ii) Non-Allocated Exploration Expenditures:
----------------------------------------------------------------------------------------------------------------------
         State of Alaska Mining Claim and Other
Miscellaneous Expenditures                                  $35,000               $35,000                 $35,000
----------------------------------------------------------------------------------------------------------------------
         Database                                           $30,000                     0                       0
----------------------------------------------------------------------------------------------------------------------
         Fairbanks & Denver Offices                        $200,000              $200,000                $200,000
----------------------------------------------------------------------------------------------------------------------
</TABLE>

      (b)   Exploration Expenditures in excess of the minimum amount required
            for each Option Year as described above may be carried forward and
            credited toward the minimum Exploration Expenditures amount accruing
            for any subsequent year or years, except that only $200,000 of
            drilling costs per each Block and associated Area of Interest may be
            so carried forward at any one time.

      (c)   Exploration Expenditures in excess of the minimum amounts required
            by Section 4.2(a) for each Option Year on each Block and associated
            Area of Interest as described above may be carried forward and
            credited toward the minimum


                                       13
<PAGE>

            required Exploration Expenditures amount for that Block accruing for
            the subsequent year or years. Minimum Exploration Expenditures
            incurred on one Block and its associated Area of Interest may not be
            carried forward as minimum Exploration Expenditures on any other
            Block and its associated Area of Interest.

      4.3 Exploration Program and Budget. On or before each March 1 during the
Option Period, North Star shall submit to Doyon a draft program and budget for
Exploration Expenditures for all properties for that Option Year. On or before
each March 15 during the Option Period, Doyon and North Star shall meet at a
mutually agreed time and place in Alaska to discuss North Star's proposed
program and budget for Exploration Expenditures for that Option Year. On or
before each March 30 during the Option Period, North Star shall submit its final
proposed program and budget to Doyon for Exploration Expenditures for that
Option Year. On or before each April 15 during the Option Period, North Star
shall approve a final program and budget for Exploration Expenditures for that
Option Year incorporating such features and expenses as it desires, subject only
to (a) the requirements hereof and (b) the right of Doyon, if Doyon disagrees
with the North Star final program and budget, to direct, on or before April 30
of each Option Year, that up to fifteen percent (15%) of the mandatory minimum
Exploration Expenditures required for that Option Year be expended on programs
which Doyon desires to have performed, if such programs comprise exploration
activities that are consistent with generally accepted exploration practices and
are not inconsistent with the objectives of this Agreement.

      4.4 Sampling. During the term of this Agreement, North Star agrees that in
obtaining analyses and assays of mineral samples it will test for all Minerals
which it reasonably believes may be present and of potential economic interest.

      4.5 Guarantee of Exploration Expenditures.

      (a)   If this Agreement is in effect for the 2004 Option Year, on or
            before April 15, 2004, North Star shall deposit and maintain in a
            separate operating account maintained at the National Bank of
            Alaska, Fairbanks, Alaska, or any other bank to which the parties
            agree, for work undertaken pursuant to this Agreement, or otherwise
            make available to the operations to be conducted for that Option
            Year by use of an irrevocable letter of credit for the benefit of
            Doyon, a sum equivalent to the minimum amount of Exploration
            Expenditures required to be made during said year. North Star shall
            notify Doyon when the required funds are made available. North Star
            shall be entitled to use the deposited funds for the purpose of
            paying the costs incurred in implementing the approved program and
            budget for Exploration Expenditures for that Option Year. The
            balance of any such minimum amount of funds, if any, remaining in
            said account after the submittal of the annual accounting provided
            for in Section 8.2(c) of this Agreement shall be paid over to Doyon.

      (b)   If, after review of the annual accounting provided for in Section
            8.2(c) of this Agreement, Doyon believes that North Star has failed
            to apply designated funds


                                       14
<PAGE>

            solely for Exploration Expenditures authorized under this Agreement,
            Doyon may initiate arbitration pursuant to Section 18.3 of this
            Agreement. If the result of that arbitration is a finding that North
            Star failed to apply designated funds solely for Exploration
            Expenditures, then Doyon may terminate this Agreement and all funds
            remaining in the operating account maintained at the National Bank
            of Alaska for work undertaken pursuant to this Agreement, if not
            previously removed and paid to Doyon pursuant to the last sentence
            of Section 4.5(a), shall be due to Doyon upon receipt of Doyon's
            request, provided that if the misapplication(s) do(es) not exceed
            $50,000 in a single instance or $100,000 cumulatively in a
            particular Option Year, then North Star shall have thirty (30) days
            after receipt of notice of the arbitration decision to that effect
            in which to pay to Doyon the amount of the misapplication, in which
            event upon receipt of payment by Doyon the default shall be cured
            and the Agreement deemed not to have terminated.

5. EXERCISE OF OPTION AND EXECUTION OF LEASE

      5.1 Prefeasibility Study; Designated Areas.

      (a)   Once North Star, pursuant to either or both of the 1997 Option
            Agreement and this Agreement, has conducted at least 5,000 feet of
            diamond core drilling for a Prospect on lands proposed for a
            Designated Area, made Exploration Expenditures of at least $500,000
            for a Prospect within one (1) mile of the boundary of a Designated
            Area for a Prospect, and has submitted a Positive Prefeasibility
            Study for that Designated Area, North Star may exercise its Option
            to lease with respect to that portion of the Designated Area which
            is Doyon Property. Notwithstanding the foregoing, if a governmental
            agency with jurisdiction over the proposed Designated Area prohibits
            reasonable drilling requested in good faith, drilling is not
            required prior to completing a Positive Prefeasibility Study and
            exercising the Option.

      (b)   Once a Mining Lease has been entered into, North Star may elect to
            exercise its Option to lease from the remaining Doyon Property, from
            time to time during the Option Period, with respect to any one or
            more Designated Areas, by giving written notice to Doyon of its
            election and delivering to Doyon a copy of its Positive
            Prefeasibility Study for each such Designated Area, except that,
            unless otherwise agreed by Doyon, not more than 14 Designated Areas,
            aggregating not more than 322,560 acres of Doyon Selected Property
            as of the date of this Agreement, all located in not more than 14
            federal townships, may be included in Mining Leases. The aforestated
            limitation on the number of Mining Leases does not apply to lands
            which are Doyon Conveyed property on the date of this Agreement.


                                       15
<PAGE>

      5.2 Request for Conveyance and Execution of Lease.

      (a)   Subject to the Permitted Exceptions, within 90 days after delivery
            to Doyon of:

            (i)   a satisfactory Positive Prefeasibility Study respecting a
                  Designated Area; and

            (ii)  notice of North Star's exercise of the Option on a Designated
                  Area and, regardless of whether the Option Period expires
                  after such delivery, Doyon shall request from the BLM a
                  conveyance of all Doyon Property therein, if Doyon has not yet
                  received such a conveyance. Doyon shall use all reasonable
                  efforts to expedite the conveyance of such Doyon Property.
                  Within thirty (30) days after Doyon's receipt of conveyance of
                  all Doyon Property as to which North Star has exercised its
                  Option, or within thirty (30) days after receipt by Doyon of
                  North Star's request if Doyon has already received conveyance
                  of all of the Doyon Property as to which North Star has
                  exercised its Option, the parties shall execute either a
                  Mining Lease (as to a new Designated Area) or an addendum to
                  an existing Mining Lease, if appropriate. Such Mining Lease or
                  addendum shall be effective as of the date of its execution.

      (b)   If Doyon, despite its best efforts, cannot secure a conveyance to
            all Doyon Property as to which North Star has exercised its Option
            because of a title defect which was (i) not of record (either in
            federal or state records), (ii) not known to Doyon and disclosed by
            it to North Star, (iii) not discovered in the course of a search
            conducted by North Star during the preparation of a Positive
            Prefeasibility Study by North Star, or (iv) was, for any other
            reason beyond the reasonable control of Doyon or North Star,
            undisclosed or unknown, and if the inability of Doyon to secure such
            conveyance materially impairs North Star's ability to build or
            expand (as the case may be) a profitable Mine, in North Star's
            reasonable estimation, then North Star may rescind its exercise of
            the Option as to such area by written notice to Doyon. Any
            Designated Area subject to such a rescission shall not constitute a
            Designated Area for purposes of the limitation set forth at the end
            of the next to last paragraph in Section 5.1. If North Star believes
            the title defect preventing Doyon from securing conveyance
            ultimately may be cured, then North Star may elect to declare an
            event of force majeure under Section 15 of this Agreement as to the
            optioned area for which conveyance is unavailable and proceed to
            attempt to cure such defect pursuant to Section 11.3.

6. CONDUCT OF OPERATIONS

      6.1 Operational Standards and Compliance with Laws. All activities under
this Agreement shall be conducted in a good and miner-like manner to the highest
standards reasonably capable of being employed now or in the future by the
mining industry and in compliance with all applicable federal, state, and local
laws and regulations, whether now


                                       16
<PAGE>

existing or subsequently enacted, including those relating to reclamation of the
Doyon Property, air quality, water quality, the treatment, storage, and disposal
of wastes and hazardous substances. Consistent with applicable laws, wastes and
hazardous substances will either be destroyed or removed from Doyon Property not
included in a Mining Lease unless Doyon consents in writing to storage or
disposal thereon. However, unless such violations of laws or breaches of
operational standards or reclamation requirements cause material harm to Doyon,
to Doyon shareholders or descendants of shareholders, or to its or their
property or to resources which are or may be owned or used by Doyon or by Doyon
shareholders or descendants of shareholders, or unless such violations or
breaches cause North Star to default in the performance of its other obligations
under this Agreement, such violations or breaches shall not be grounds for Doyon
to terminate this Agreement under Section 14 below. North Star recognizes that
compliance with laws and regulations may not be adequate to meet the operational
standards of this Section 6.1 or the reclamation requirements of Section 6.2
herein. The requirements of this Section 6.1 terminate as to the lands within a
Mining Lease, upon the issuance of that Mining Lease.

      6.2 Condition of Sites and Facilities; Reclamation Bond.

      (a)   North Star shall, at all times, keep all areas of the Doyon Property
            on which it is conducting activities in a neat and clean condition,
            free of unnecessary accumulation of debris and waste resulting from
            North Star's operations. During the term of this Agreement, all
            improvements constructed on the Doyon Property by North Star shall
            be maintained in good condition and reasonably secured.

      (b)   Prior to commencement of exploration activities on the Doyon
            Property, North Star shall (i) obtain for the benefit of Doyon a
            reclamation performance bond or other financial security in an
            amount equal to 150% of the amount required by all applicable laws
            relating to North Star's operations on the Doyon Property, and (ii)
            provide Doyon with a copy of the reclamation bond or other financial
            security it so obtains. For purposes of the preceding sentence,
            North Star hereby waives any rights it may have under AS
            27.19.050(a). Doyon shall have the right at any time to require
            verification of the existence and amount of financial security
            required by this Section. To the extent permitted by law, North Star
            shall name Doyon as co-beneficiary on any bond or other form of
            financial security obtained pursuant to this Section, or in favor of
            a federal, state or local governmental agency.

      6.3 Archaeological and Cultural Resources Clearances. Prior to conducting
surface disturbing activities such as trenching, drilling, or similar mechanized
operations on any site within the Expenditure Area, North Star shall conduct,
through use of qualified personnel, an archaeological and cultural resources
survey of each site to determine the existence of artifacts, remains, and places
of cultural significance to Alaska Natives and, if such artifacts and remains
are discovered or places identified, to minimize possible adverse effects on
such sites from mineral exploration activities allowed under this Agreement.
North Star shall provide Doyon with copies of all archaeological and cultural
resources surveys as they are completed. Selection


                                       17
<PAGE>

of such personnel shall be made by North Star and approved by Doyon (whose
approval shall not be unreasonably withheld) and a written report of each such
survey shall be submitted to Doyon. Doyon acknowledges its obligation under
Section 8.1(a) of this Agreement to provide information to North Star about
archaeological and cultural resources within the Expenditure Area.

      6.4 Notice of Non-Responsibility. North Star shall post and maintain
notices at its operations on the Doyon Property stating that Doyon (except to
the extent it acquires a working interest in a Mining Lease) shall not be
responsible or liable for any claim for performing labor or furnishing
materials, supplies, machinery, or other fixtures or for damages in connection
with North Star's operations on the Doyon Property and that Doyon's interest in
the Doyon Property shall not be subject to any lien or claim of lien therefor.
Doyon acknowledges that Doyon shall be responsible and liable for any such claim
or lien arising out of its own operations on the Doyon Property during the
Option Period.

      6.5 Liens and Encumbrances. Except with respect to its leasehold interest
under any Mining Lease, its rights to Minerals, Ores, and Mineral Products
produced pursuant thereto, and its improvements in a Designated Area subject to
any Mining Lease, North Star shall not permit or allow the assertion by any
person of any claim, lien, or encumbrance of any nature whatsoever arising out
of or resulting directly or indirectly from its activities on the Doyon
Property, including but not limited to North Star's interest in the Minerals,
Ores, and Mineral Products located therein or derived therefrom and any
improvements to the Doyon Property. If any such claim, lien, or encumbrance is
asserted by any third person, North Star shall promptly discharge the same
unless North Star in good faith contests the claim, lien, or encumbrance, in
which event North Star shall provide Doyon with a bond or other reasonable
assurance of payment acceptable to Doyon in an amount adequate to protect Doyon
against loss from the claim, lien, or encumbrance and all costs associated
therewith, including without limitation penalties and attorneys' fees.

      6.6 Taxes. North Star shall pay when due, during the term of this
Agreement, all taxes assessed against its personal property and all improvements
placed upon the Doyon Property, and ad valorem and reserves taxes or other taxes
assessed against the Doyon Property which result from North Star's activities on
the Doyon Property. North Star shall have the right, at its option, to contest,
in the courts or otherwise, in its own name, the validity or amount of any such
taxes or assessments, if it deems the same unlawful, unjust, unequal, or
excessive, or to take such other steps or proceedings as it deems necessary to
secure a cancellation, reduction, readjustment or equalization thereof, before
it shall be required to pay the same. Doyon shall pay property taxes and all ad
valorem taxes assessed against the Doyon Property for improvements not placed
thereon by North Star. Doyon shall furnish to North Star duplicate receipts of
all such taxes or assessments when paid. If Doyon receives tax bills or claims
which are the responsibility of North Star hereunder, the same shall be promptly
forwarded to North Star for appropriate action and, if not so forwarded, Doyon
shall be responsible for any delinquent payment charges or interest charges
resulting from the late payment of such taxes.


                                       18
<PAGE>

      6.7 Insurance. In addition to reclamation bonding required by Section 6.2
above, North Star shall, at all times while conducting operations pursuant to
this Agreement, comply fully with applicable worker's compensation laws and
purchase protection for it and Doyon comparable to that provided under standard
form insurance policies for the following: (a) comprehensive public liability
and property damage with combined limits of $2,000,000 for bodily injury and
property damage; (b) automobile insurance with combined limits of $500,000; and
(c) adequate and reasonable insurance against risk of fire and other risks
ordinarily insured against in similar operations. Doyon shall be named an
additional insured under all such insurance policies (to the extent permitted by
law) and North Star shall cause Doyon promptly to be furnished with insurance
certificates evidencing such insurance at any time upon request.

      6.8 Indemnification. North Star shall indemnify, defend, and hold harmless
Doyon, its shareholders and direct descendants thereof, employees, agents, and
representatives against all liabilities, losses, damages, fines, penalties,
costs, and expenses of whatever kind or character (including without limitation
reasonable attorneys' fees), or any claims therefor, for North Star's failure to
comply with the terms of this Agreement, or the terms of any governmental permit
or approval issued in connection with this Agreement, for destruction of or for
damage to property, including property of Doyon or of a Village, arising out of
or resulting from North Star's performance under this Agreement, and for the
death of or injury to any persons, including employees, agents, and contractors
of Doyon and North Star, arising out of or resulting from North Star's
performance under this Agreement. North Star shall pay, on behalf of Doyon, upon
its demand, the amount of any judgment that may be entered against Doyon in
connection with the purposes for which this indemnification is given, if
execution on any such judgment has not been stayed by appropriate court order.
North Star shall not be liable to Doyon for punitive damages relating to damages
to Doyon and vice versa.

      6.9 Coordination of Surface Uses; Reservation by Doyon of Alluvial Placer
Gold Occurrences.

      (a)   North Star and Doyon acknowledge that the surface of the Doyon
            Property, including specifically the Village Property, has uses in
            addition to mineral exploration. Doyon reserves the right to manage
            and use the Doyon Conveyed Property and the Doyon Selected property
            for all such uses during the term of this Agreement. Each party
            shall use reasonable and diligent efforts to notify and coordinate
            with the other so as to minimize interference to the activities of
            the other resulting from its activities. Specifically, North Star
            acknowledges that Doyon has advised it that sometime in the future
            Doyon may lease certain of the Doyon Property within the Kandik
            Block for oil and gas purposes. Such oil and gas lease or leases may
            interfere with the operations of North Star notwithstanding Doyon's
            or its lessees' reasonable and diligent efforts to minimize such
            interference; any such interference shall not be a breach of
            obligations by Doyon under this Agreement and any Mining Lease
            hereunder.

      (b)   Without limiting the generality of the foregoing, Doyon shall notify
            North Star whenever Doyon enters into any exploration or development
            contract for any


                                       19
<PAGE>

            Alluvial Placer Gold Occurrence and whenever Doyon intends to
            conduct operations on any Alluvial Placer Gold Occurrence on the
            Doyon Property. North Star acknowledges that Doyon reserves the
            exclusive right to explore for and develop (or to authorize third
            parties to explore for and develop) Alluvial Placer Gold
            Occurrences. North Star shall conduct its operations under this
            Agreement on lands containing Alluvial Placer Gold Occurrences in a
            manner which does not materially interfere with the exploration or
            development of Alluvial Placer Gold Occurrences by Doyon or third
            parties claiming under Doyon. If requested by North Star, Doyon
            agrees to lease to North Star Alluvial Placer Gold Occurrences if
            and to the extent that North Star is conducting or plans to conduct
            operations on those lands. The terms of such lease shall be
            substantially the same as those contained in other leases that Doyon
            grants or is willing to grant to third parties, except that Doyon
            shall prohibit assignment or subletting of the Alluvial Placer Gold
            Occurrences leasehold estate by North Star.

      6.10 No Hunting, Fishing and Trapping; No Consumption of Alcoholic
Beverages. North Star, its contractors and consultants, and its and their
employees shall not engage in any hunting, fishing, or trapping nor consume
alcoholic beverages in or on the Expenditure Area or on Village Property without
the prior written consent of Doyon and the appropriate Village.

      6.11 Doyon's Liability Limitations. Doyon shall not be liable to North
Star, its agents, employees, or contractors for any losses, damages, expenses,
liabilities, or claims therefor of whatever kind or character resulting from or
arising out of any dangerous or hazardous conditions in the Expenditure Area,
whether or not known to Doyon. This Section is not intended to limit in any way
the tort immunity granted by Alaska Statutes ss. 09.65.200 (tort immunity for
personal injuries or death occurring on unimproved land).

      6.12 Federal or State Mining Claims. During the term of this Agreement and
any Mining Lease entered into which covers federal or State Mining Claims, North
Star shall have the sole responsibility of maintaining any federal or State
Mining Claims located by it within the Expenditure Area, including the payment
of any rentals, performance of any assessment work or payment of fees to the
Bureau of Land Management or State of Alaska. If North Star elects not to
continue to maintain any federal or State Mining Claims, it may do so by
releasing those claims from this Agreement, but it shall first offer the federal
or State Mining Claims to be released to Doyon by means of a quitclaim deed of
all of its right, title and interest in the claims to Doyon. Doyon may elect to
accept the released claims and request the quitclaim deed, or it may notify
North Star that it does not elect to accept the release claims, in which event
North Star thereafter may abandon the claims proposed for release.


                                       20
<PAGE>

7. CONTRACTING AND HIRING PREFERENCES

      7.1 Contracting Preference. North Star shall invite Doyon, or any entity
designated by Doyon in which Doyon has a financial interest of 25% or more, to
make proposals or bids on all contracts bid or let after the date of this
Agreement relating to operations of North Star within the Expenditure Area which
North Star elects to have performed by an independent contractor, which are
normally put out to general bid, and which are a type of contract that Doyon has
previously notified North Star that it is interested in performing. To enable
Doyon to have an adequate opportunity to prepare itself, and to associate with
others in making proposals or bids for contracts, North Star shall notify Doyon
not less than 30 days prior to the date any invitation to bid is scheduled to be
transmitted or published, as early as reasonably possible, of any contracts or
activities in which Doyon has the opportunity to participate pursuant to this
Section. In that event, Doyon or such entity shall be first and preferentially
considered for such contracts to be performed for North Star as follows:

      (a)   Each proposal or bid from Doyon or such entity shall be accepted if
            (1) the goods or services offered are substantially equivalent in
            quality to those offered by the best acceptable competing proposal
            or bid received by North Star, (2) after full consideration of
            likely operating efficiencies, if any, it will cost no more than the
            best acceptable competing proposal or bid received by North Star,
            and (3) the experience and capability of Doyon or such entity, if
            applicable, to perform in accordance with good and accepted
            practices can be demonstrated by Doyon or such entity to North
            Star's reasonable satisfaction.

      (b)   North Star agrees that Doyon/Universal Services Joint Venture, or
            any successor owned or controlled by Doyon or in which Doyon
            maintains a twenty-five percent (25%) or greater interest, is
            experienced and capable of performing remote site food service and
            housekeeping services for any operation of North Star.

      (c) This Section shall not be construed to restrict in any way the right
of North Star to perform any work or supply any services itself. North Star
shall be relieved of the obligation to comply with any provision of this Section
to the extent that such provision causes any delay in operations that would not
occur if it were not in effect.

      7.2 Hiring Preference. North Star shall preferentially hire qualified or
experienced Doyon shareholders and their qualified or experienced family
members, if such persons are identified and available to North Star, and shall
use all reasonable efforts to provide training for such shareholders and their
family members to perform such phases and aspects of operations under this
Agreement as is reasonably possible. In that regard North Star agrees that it
specifically shall (i) on or before April 1st of each year and at reasonable
intervals thereafter, or upon request of Doyon provide Doyon with an estimate of
the number of jobs and types and classification of jobs it expects will be
needed to perform its obligations under this Agreement, and (ii) work with the
Tanana Chiefs Conference located in Fairbanks, Alaska, or another appropriate
agency, to take advantage of existing training programs of the Conference and to
develop with the Conference new training programs as may be necessary in order
to obtain


                                       21
<PAGE>

compliance of North Star's obligations under this section. Doyon acknowledges,
however, that employment opportunities may be limited prior to the commencement
of Commercial Production under any Mining Lease. Unless otherwise agreed, each
contract entered into between North Star and any person to perform work relating
to operations or other activities undertaken within the Expenditure Area, and
each subcontract thereunder, shall contain specific requirements binding upon
such person similar to those set forth in this Section and making Doyon a third
party beneficiary with the power to enforce such rights. North Star shall
cooperate in good faith with Doyon to encourage its contractors and
subcontractors to comply with such requirements.

      7.3 No Violation of Laws. North Star shall comply with Sections 7.1 and
7.2 only to the extent that such compliance does not violate any federal, state,
or local law.

8. INFORMATION AND REPORTS

      8.1 Information.

      (a)   Doyon will make available for North Star's inspection and copying at
            North Star's expense all information which it has available as to
            the Expenditure Area, including but not limited to information
            regarding archaeological and cultural resources on such lands and
            any data obtained from mineral exploration on such lands, provided,
            however, Doyon makes no representations or warranties concerning
            such information and shall not be liable to North Star or third
            parties for the accuracy or completeness of any information made
            available to North Star. Doyon represents and warrants to North Star
            that (a) neither Doyon nor its Affiliates is a party to any other
            contract or agreement providing for the mineral exploration of the
            Expenditure Area and (b) the provision of information to North Star
            under this Section is not restricted in any way by contractual
            obligations of Doyon or its Affiliates. North Star shall indemnify
            and hold Doyon harmless from any such liability or responsibility
            alleged by North Star or third parties who obtain such information
            from or through North Star. North Star shall treat all such
            information as confidential in accordance with Section 17 of this
            Agreement.

      (b)   All information received by Doyon during the Option Period shall be
            considered and treated as confidential by Doyon in accordance with
            Section 17 of this Agreement. Doyon and North Star recognize the
            high risks and uncertainties involved in the interpretation of any
            information provided by North Star under this Section. North Star's
            interpretation or analysis of any information shall be made in good
            faith and based on its expertise, provided however that North Star
            makes no representations or warranties respecting the accuracy or
            completeness of any information and shall not be liable or
            responsible to Doyon or third parties for any damages or injury
            arising out of or resulting from any information or reliance
            thereon.

      (c)   Technical materials generated and samples collected during the term
            of this Agreement with respect to any particular lands, or copies of
            such materials and


                                       22
<PAGE>

            representative splits of samples, will be provided to Doyon at the
            termination of the Agreement as to said lands (or in the case of
            materials and samples relevant to further development of Doyon
            Property then subject to a Mining Lease, at the termination of such
            Mining Lease). Such materials and samples will be thoroughly
            labeled, indexed, and preserved, in accordance with reasonable
            mining industry standards, throughout the term of this Agreement.
            Doyon shall have the right to inspect all samples, drill stem
            cuttings, and drill core taken by North Star, provided that Doyon
            shall pay any costs associated with Doyon's inspection, including,
            but not limited to the costs of travel to the site of sample
            storage. At Doyon's request, North Star at its cost shall furnish to
            Doyon's representative splits of all such samples, cuttings and
            cores. Examples of technical materials and samples to be provided to
            Doyon at the termination of the Agreement as to any particular lands
            are as follows:

            (i)   Sample Materials: Geochemical samples, rock samples, core
                  samples, thin section, and other materials gathered during the
                  course of exploration and evaluation. Specifically,
                  geochemical sample pulps will be stored throughout the
                  program.

            (ii)  Sample Location Maps: Detailed maps showing the locations of
                  geochemical samples, geophysical flight lines and field
                  stations, and geologic mapping will be maintained at a scale
                  sufficient to allow relocation or reproduction of samples or
                  surveys.

            (iii) Field Notes, Sample Cards, Daily/Weekly Logs: Field
                  investigation will be conducted in a uniform and systematic
                  manner whenever possible and in consultation with Doyon. These
                  investigations will be documented by field notes, systematic
                  and unique sample numbers and data cards for geochemical and
                  rock samples, and daily or weekly logs summarizing the
                  activities of individual camps or geologists.

            (iv)  Geophysical Data: Air photos, satellite imagery, airborne and
                  ground geophysical survey data acquired, used, or generated by
                  the program, including but not limited to all raw data, will
                  be provided to Doyon along with adequate documentation as to
                  dates of survey, contractors, and sources of information.

            (v)   Data Base: Data acquired by the program will be maintained in
                  a computerized data base in Microsoft Access consistent with
                  mineral industry standards and according to the field format
                  provided to North Star by Doyon. The data base will include at
                  a minimum geochemical analytical data and their respective
                  digitized sample location maps, information on sample type
                  analytical procedures, and analysis dates.

      8.2 Reports.


                                       23
<PAGE>

      (a)   North Star shall meet orally (in person or by phone) with Doyon at
            least monthly to provide progress reports of its operations and
            shall provide written quarterly progress reports (i) setting forth
            its progress at implementing the approved program and budget for
            each Option Year, and (ii) providing notice of operations to be
            conducted on Doyon Property during the next ensuing three-month
            period.

      (b)   North Star shall prepare and submit to Doyon a draft annual report
            for each Option Year during the term of this Agreement on or before
            February 5 of the succeeding Option Year and North Star shall
            provide three copies of the final annual report for each Option Year
            during the term of this Agreement on or before March 1 of said
            Option Year. This report shall contain a description of work done
            within the Expenditure Area, results of sampling, drill logs and
            maps, a narrative of North Star's analysis of the results, and the
            other types of information described below. In addition, North Star
            shall include as an appendix to each annual report an identification
            of (1) those portions of each Block which are of no further interest
            to North Star for activities under this Agreement and (2) on
            separate priority lists for the Doyon Selected Property and the
            Doyon Conveyed Property, those portions of each Block by priority of
            importance, described as compact and contiguous tracts in units not
            smaller than whole sections, which are of continued interest to
            North Star for activities under this Agreement, together with a
            narrative of geologic reasons for each ranking (hereinafter referred
            to as the "Selected Lands Annual Prioritization List" and the
            "Conveyed Lands Annual Prioritization List" or collectively as the
            "Prioritization Lists"). It is the intent of the parties that the
            Selected Lands Prioritization List shall be of assistance to the
            parties in the event of a BLM Requested Selection Reduction, thereby
            expediting the intent of Section 10.2, and as a means of identifying
            lands which North Star will not further explore and which are thus
            of no further interest to North Star. Doyon and North Star recognize
            the high risks and uncertainties involved in the interpretation of
            any information provided by North Star under this Section 8.2. North
            Star's interpretation or analysis of any information shall be made
            in good faith and based on its expertise, provided however that
            North Star makes no representations or warranties respecting the
            accuracy or completeness of any information and shall not be liable
            or responsible to Doyon or third parties for any damages or injury
            arising out of or resulting from any information or reliance
            thereon. The Annual Report will have the following characteristics:

            (i)   The Annual Report may consist of several volumes depending on
                  the nature of the work.

            (ii)  The Annual Report shall review activities by several
                  categories:

                  (A)   Exploration: concepts, methodologies and results;


                                       24
<PAGE>

                  (B)   Geographic areas of investigation, specifically by
                        Prospect, Block, and associated Area of Interest;

                  (C)   Minerals studied, to reflect the diversity of
                        exploration conducted and to demonstrate that all
                        Minerals have been reasonably and adequately considered.

            (iii) The following topics shall be addressed in the Annual Report
                  as separate sections:

                  (A)   Executive Summary;

                  (B)   Introduction: location of activities, background on each
                        project, participants, and a general overview of
                        activities; goals and objectives of the program,
                        including specific targets, regional activities and
                        methodology;

                  (C)   Logistics: personnel, dates of activities, location of
                        camps, laboratory and sampling techniques;

                  (D)   Background geology and previous work;

                  (E)   Results, including goals achieved, new concepts,
                        particular problems or obstacles, including permitting
                        and environmental constraints encountered or identified;

                  (F)   Recommendations for future work;

                  (G)   Draft Program and Budget for coming Option Year;

                  (H)   Appendices:

                        1.    Geologic Maps;

                        2.    Geochemical Results: copies of lab sheets showing
                              techniques, lab and other related information;

                        3.    Geophysical results: showing techniques,
                              contractor lines and stations, and other
                              appropriate information;

                        4.    Sample location maps at a scale of one inch = one
                              mile or more detailed, depending on specific work
                              conducted;

                        5.    Core logs;


                                       25
<PAGE>

                        6.    Sample descriptions;

                        7.    Photos of core, facilities, samples, or Prospects
                              useful in evaluating the program;

                        8.    Prioritization analysis and lists (beginning in
                              second Option Year);

                        9.    Other sections and topics may be added at the
                              discretion of the parties.

         (c)      Within 45 days after the end of each Option Year during the
                  term of this Agreement, North Star shall submit to Doyon an
                  accounting showing the Exploration Expenditures on or for the
                  benefit of each Block within the Expenditure Area in said
                  Option Year. Such accounting shall be prepared using generally
                  accepted accounting principles as consistently employed in the
                  United States.

         (d)      Upon termination of this Agreement, North Star shall submit to
                  Doyon a termination report which shall be similar in content
                  and form to an annual report.

9. ACCESS TO THE PROPERTY AND SAMPLING BY DOYON

      9.1 Entry. During the Option Period, Doyon and its duly authorized
representatives may enter upon the Doyon Property and, to the extent that North
Star has authority to allow entry, may enter upon Third Party Property within
the Expenditure Area, for any purpose at its and their sole risk and expense
provided that such entry does not unreasonably interfere with North Star's
operations within the Expenditure Area. Doyon agrees to hold as confidential, in
accordance with Section 17 of this Agreement, any information relative to North
Star's operations within the Expenditure Area gained by such entry.

      9.2 Sampling. During the Option Period, Doyon and its duly authorized
representatives may take such samples from the Doyon Property and, to the extent
that North Star has authority to allow entry, from Third Party Property within
the Expenditure Area; provided, however, that such sampling does not
unreasonably interfere with North Star's operations within the Expenditure Area.
Any information gained from such sampling by Doyon shall be considered as
confidential by Doyon within the meaning of Section 17 below and shall be shared
with North Star.

10. RELEASES AND CONVEYANCES OF PROPERTY

      10.1 Releases of Property by North Star.

      (a)   From time to time during the Option Period, as more fully described
            herein, lands included in the Doyon Property which North Star has
            elected not to explore


                                       26
<PAGE>

            further for Minerals shall be released by North Star from this
            Agreement by written notice to Doyon in units of not less than whole
            sections with the limitation that:

            (i)   all Doyon Conveyed Property not released shall be configured
                  in reasonably compact and contiguous units, comprised of whole
                  sections, substantially in the shape of a square or a
                  rectangle whose length is no more than three (3) times its
                  width; and

            (ii)  all reasonable efforts shall be made by North Star so that the
                  Doyon Selected Property not released shall be configured in
                  reasonably compact and contiguous tracts of not less than nine
                  (9) whole sections having boundaries with no segment of an
                  exterior line less than two (2) miles in length (except where
                  shorter segments are necessary (A) to follow section lines
                  where township lines are offset along standard parallels
                  caused by the convergence of meridians, (B) to conform to
                  section lines where a section is less than standard size, or
                  (C) to avoid crossing the boundary lines of lands which are
                  unavailable for conveyance) and, except where the boundary is
                  the border of a navigable body of water, such exterior
                  boundary lines shall follow section lines.

      (b)   In addition, if Doyon is notified by the BLM of a BLM Requested
            Selection Reduction, then North Star upon receipt of Doyon's written
            request, shall review such information as it has collected relating
            to any portion of the Doyon Property then subject to this Agreement
            and identified by Doyon and, if in North Star's opinion it will not
            explore further that portion of the Doyon Property, then North Star
            shall release that portion of the Doyon Property from this Agreement
            by written notice to Doyon. If so requested by Doyon, North Star
            shall execute and deliver to Doyon a quitclaim and release of such
            portion of the Doyon Property.

      (c)   Doyon, in its sole discretion, may make any decision regarding
            disposition of those portions of the Doyon Property released by
            North Star from this Agreement. For example, Doyon may in its sole
            discretion relinquish lands from selection under ANCSA if those
            lands have been released from this Agreement by North Star, or Doyon
            may elect to continue holding those lands as selected lands.
            Identification by North Star of lands of no further interest to
            North Star under this Section shall have the effect of releasing
            such land from this Agreement.

      10.2 Release or Conveyance of Property in the Event of a BLM Requested
Selection Reduction. If a BLM Requested Selection Reduction is required of Doyon
and as a result of the BLM Requested Selection Reduction Doyon believes a
significant portion of the lands selected by it under ANCSA must be relinquished
from the selection process or that Doyon's selection priorities must be
finalized or both, Doyon shall promptly notify North Star. If either type of BLM
Requested Selection Reduction occurs, then North Star shall have the right for a
period of ninety (90) days after receipt of notice from Doyon, or such shorter
time as is made necessary by


                                       27
<PAGE>

the requirements of the BLM, to require that Doyon request from the BLM
conveyances of specific portions of the Doyon Selected Property, as constituted
on the date of this Agreement, not previously released, aggregating not more
than 322,560 acres (minus the aggregate number of acres of Doyon Selected
Property which have been conveyed subsequent to the date of this Agreement), all
located in not more than fourteen (14) federal townships and consistent with the
parcel size restrictions in Section 10.1 above and the possible additional
limitations of Section 5 of this Agreement. If North Star does not respond to
Doyon's notice within the time allowed, Doyon in its absolute discretion may
proceed to make the necessary relinquishments and/or conveyance prioritizations
and requests without obligation to take the conveyances otherwise required by
this Section.

      10.3 Notice of Selection Status. From time to time Doyon shall report to
North Star any developments known to Doyon which might result in a BLM Requested
Selection Reduction.

11. TITLE

      11.1 Representations and Warranties. Doyon represents and warrants to
North Star as follows:

      (a)   it has received conveyance of the Doyon Conveyed Property pursuant
            to ANCSA subject to certain Permitted Exceptions, and it has the
            sole and exclusive rights to deal in and with the Doyon Conveyed
            Property and the Village Conveyed Subsurface in accordance with this
            Agreement;

      (b)   it has selected the Doyon Selected Property under one or more
            provisions of ANCSA, subject to the provisions of ANCSA and to
            certain Permitted Exceptions;

      (c)   the Doyon Selected Property, Doyon Conveyed Property and Village
            Conveyed Subsurface, subject to certain Permitted Exceptions and
            except as otherwise disclosed in this Agreement or any Exhibits or
            Schedules attached hereto, are free and clear of any lien,
            encumbrance, or other interest of any kind arising by, through, or
            under Doyon.

Except as expressly set forth above, Doyon makes no representations or
warranties as to title to the Doyon Property, whether express, implied, or
statutory. Except for the limitations noted or implied in Sections 2.2, 6.9 and
10.2 of this Agreement, Doyon to the best of its knowledge represents that it
has not taken and covenants that it will not take any action with respect to
title to or the status of the Doyon Property that would impair or diminish North
Star's rights under this Agreement or any Mining Lease. Doyon further represents
that there are no agreements, arrangements, or understandings to which Doyon is
a party (other than those referred to in this Agreement) regarding the Doyon
Property or any part of it.


                                       28
<PAGE>

      11.2 Land Records. While this Agreement is in effect, at North Star's
request, Doyon will make available to North Star for inspection and copying, at
North Star's expense, copies of all land records relating to the Doyon Property
and the Placer Dome Inc. State Mining Claims in the Elephant Mountain Area in
Doyon's possession or control. Doyon makes no warranties or representations and
shall not be liable to North Star or third parties for the accuracy or
completeness of any information made available to North Star. North Star shall
indemnify and hold Doyon harmless from any such liability or responsibility
alleged by North Star or third parties who obtain such information from or
through North Star. North Star recognizes that information regarding the land
status of the Doyon Selected Property and Village Conveyed Surface and likely
Permitted Exceptions may be available in the BLM records.

      11.3 Title Curative Measures. If in North Star's opinion, title to all or
part of the Doyon Property is subject to any Permitted Exceptions or any other
reservations, exceptions, exclusions, restrictions, limitations, liens,
encumbrances, or claims or interests of third parties, or if in North Star's
opinion Doyon does not own or hold the Doyon Property as represented above, then
(in addition to any other rights which it might have under this Agreement or at
law generally) North Star shall have the right to take such action as will
produce a title satisfactory to it, at its own expense. Doyon shall bring or
join in any administrative proceeding or litigation relating to the title to any
Doyon Property and shall otherwise cooperate fully with North Star in its title
curative efforts hereunder, except that Doyon shall not have any obligation to
bring, to join in, or to cooperate with North Star in any administrative
proceeding or litigation relating to a Native allotment conflicting with title
to any Doyon Property. North Star shall have the right to set off against the
Exploration Expenditures requirements set forth in Section 4.2 any and all
reasonable amounts expended by it to cure title deficiencies that constitute a
breach of Doyon's "by, through or under" warranty described in Section 11.1(c).
If North Star acquires Third Party Property as part of such title curative
actions, such acquisitions shall be treated as acquisitions within the
Expenditure Area.

12. NO REPRESENTATIONS CONCERNING CONDITION OF LAND

      Doyon makes no representation or warranties to North Star concerning
pollution or hazardous or dangerous conditions on the Doyon Property.

13. ACQUISITIONS WITHIN EXPENDITURE AREA

      13.1 Acquisition by Doyon. If Doyon now owns or hereafter acquires, during
the term of this Agreement, any Third Party Property within the Expenditure
Area, Doyon shall promptly give notice thereof to North Star and the property
shall become Doyon Property subject to this Agreement.

      13.2 Acquisition by North Star.

      (a)   If North Star or any Affiliate of North Star acquires any Third
            Party Property which is either totally or partially within the
            Expenditure Area or Buffer Zone for the Expenditure Area or totally
            or partially within the Expenditure Areas as


                                       29
<PAGE>

            defined in the 1997 Option Agreement, including any federal or state
            mineral interests acquired by the location of unpatented federal
            claims or State Mining Claims, and if such Third Party Property is
            acquired (a) at any time during the term of this Agreement or (b)
            within three (3) years after the date of termination of this
            Agreement, then North Star shall promptly give notice of such
            acquisition to Doyon, together with a copy of the agreement or
            document by which North Star acquired a Third Party Property.

      (b)   With respect to any such acquired Third Party Property as lies
            within an Expenditure Area, Doyon shall be entitled to, and is
            hereby granted the right to, receive a Royalty in the form attached
            hereto as Exhibit B (Conveyance of Overriding Royalty) covering only
            that portion of the lands of that Third Party Property within the
            Expenditure Area, without regard to whether a Mining Lease is issued
            for any adjacent Doyon Property. In addition, if a Feasibility Study
            is prepared which recommends the development of a Mine on such
            acquired Third Party Property, within 120 days after receiving a
            copy of such Feasibility Study, Doyon may elect, by written notice
            to North Star, to acquire a Working Interest in all of such acquired
            Third Party Property in the manner set forth in Exhibit C (Third
            Party Property Working Interest Elections).

      (c)   If North Star or any affiliate of North Star acquires any Third
            Party Property within the Buffer Zone of a block, then Doyon shall
            be entitled to, and is hereby granted the right to, receive a
            conveyance from North Star of an undivided working interest of not
            less than 10% and not more than 20% of only that portion of such
            Third Party Property interest acquired by North Star,
            notwithstanding any subsequent conveyance by North Star to third
            parties within the Buffer Zone. Unless Doyon then elects to join
            with North Star in the exploration and development of such acquired
            Third Party Property in the manner set forth in Exhibit C (Third
            Party Property Working Interest Elections), the cost of maintenance
            of such undivided interest acquired by Doyon shall be carried by
            North Star until either the relinquishment of such Third Party
            Property by North Star (which relinquishment North Star may make 60
            days after first delivering such acquired interest to Doyon) or the
            delivery of a Feasibility Study to Doyon which recommends the
            development of a mine on such acquired interest, whereupon Doyon
            shall have 120 days to elect by written notice to North Star, either
            (a) to join in the development of said Mine by contributing to the
            joint venture formed in the manner set forth in Exhibit C attached
            hereto, or (b) to relinquish its undivided working interest in the
            Third Party Property to North Star.

            (i)   Doyon's right to acquire that Working Interest shall be free
                  and clear of any encumbrances or burdens created by, through
                  or under North Star, except as provided in Section 2 of
                  Exhibit C to this Agreement.

            (ii)  Doyon shall notify North Star in writing within sixty (60)
                  days after Doyon's receipt of North Star's notice whether
                  Doyon elects to acquire a


                                       30
<PAGE>

                  Working Interest and, if so, the percentage Doyon elects to
                  acquire. A failure by Doyon to so elect shall be deemed
                  conclusively to be an election by Doyon not to acquire a
                  Working Interest in that Third Party Property.

      (d)   North Star shall cause its Affiliates to be bound to the provisions
            of this Section 13.2, including the extent to which these provisions
            related to the Expenditure Area of the 1997 Option Agreement, by
            written agreement and such agreement shall specify that Doyon is an
            intended third party beneficiary with the right to independently
            enforce the provisions of this Section against the Affiliate. If any
            Affiliate of North Star ceases to be an Affiliate of North Star, the
            time periods listed in the previous sentence shall begin to run at
            the time such Affiliate ceases to be an Affiliate of North Star.

      13.3 Other Agreements. The parties recognize that Doyon may have entered
into an agreement or agreements with third parties (the "Contracting Third
Party") which contain area of interest provisions that may conflict with the
area of interest provisions of Section 13.2 of this Agreement and that Doyon may
enter into such agreements after the date of this Agreement. A list of all such
existing agreements shall be provided to North Star within 60 days after
execution of this Agreement. Doyon shall notify North Star of any similar
agreements executed after the date of this Agreement, providing a description of
the affected lands. North Star agrees that North Star shall have no right to
acquire any interest in interests or rights obtained by Doyon pursuant to the
area of interest provisions in such other agreements whether now existing or
hereafter created unless the Contracting Third Party obtaining an interest is an
Affiliate of Doyon. Further, North Star agrees and recognizes that if the
Contracting Third Party acquires any interest in the surface or minerals, or in
any other real property interest, in the area of interest established by this
Agreement, North Star shall not have any rights under this Agreement with
respect to the interests acquired by that Contracting Third Party.

      13.4 Survival of Expenditure Area; 1997 Option Agreement.

      (a)   Sections 13.1, 13.2 and 13.3 of this Agreement shall survive the
            termination or expiration of this Agreement. If on their face
            Sections 13.1, 13.2 and 13.3 of this Agreement and the "area of
            interest" provision of any Mining Lease apply to any particular
            lands, only the area of interest provision of said Mining Lease
            shall be deemed to apply.

      (b)   Doyon and North Star specifically recognize that they have by this
            Agreement amended and superseded the provisions of Section 13.2 of
            the 1997 Option Agreement whereby there shall be no three (3) year
            limitation imposed on Third Party Property acquisition by North Star
            or its Affiliates within the Expenditure Area of the 1997 Option
            Agreement except to the extent of the three (3) year limitation
            contained in Section 13.2(a) of this Agreement. They further
            recognize and agree that this Agreement has the effect of amending
            the Royalty payable to Doyon with respect to a Third Party Property
            acquisition by North Star or its Affiliates but agree that any
            Royalty amendment shall not effect in any way the


                                       31
<PAGE>

            amount of royalty due or calculated pursuant to any Conveyance of
            Overriding Royalty granted to Doyon pursuant to the terms of the
            1997 Option Agreement.

14. DEFAULT; TERMINATION OR ABANDONMENT OF PROPERTY

      14.1 Default. If North Star fails to: (i) make the payments required by
Section 3; (ii) deposit the funds required by Section 4.5; (iii) make the
mandatory minimum Exploration Expenditures required by Section 4.2; or (iv)
otherwise materially defaults in the performance of any of its obligations
hereunder and does not cure such default within seven (7) days after receipt of
written notice as to a default under item (i) or item (ii) or does not cure such
default within thirty (30) days after receipt of notice as to a default relating
to either item (iii) or item (iv), or if such default under item (iii) or item
(iv) cannot be cured within thirty (30) days of notice and North Star does not
commence in that thirty (30) day period to cure the default, then this Agreement
and the Option granted hereby shall terminate and all funds designated for
Minimum Exploration Expenditures remaining in the operating account established
pursuant to Section 4.5, if any, shall be transferred to Doyon; provided that
(x) if North Star disputes whether a condition of default exists and diligently
pursues resolution of that dispute through discussions with Doyon, arbitration
or litigation, then the period for cure above shall be extended until thirty
(30) days following the final resolution of that dispute, and (y) if cure of the
default has commenced during the thirty (30) day notice period and thereafter
North Star diligently pursues all steps necessary to cure the default as
expeditiously as is reasonable under the circumstances, then this Agreement
shall continue so long as North Star is expeditiously attempting to cure the
default and thereafter if the default is cured.

      14.2 Abandonment. In the event North Star elects to abandon any interests
owned or controlled by it in any Third Party Property within the Expenditure
Area or any Village Property within the Expenditure Area, or any property
acquired under Section 13.2, it shall first offer such interests to Doyon who
shall have sixty (60) days in which to elect in writing to receive a conveyance
of all or some of such interests.

      14.3 Termination. If all or any part of the Doyon Property is surrendered
by North Star to Doyon or this Agreement is terminated with respect thereto,
then:

      (a)   Upon Doyon's request, North Star shall deliver to Doyon all samples
            and copies of any information acquired by North Star from its
            operations on such surrendered Doyon Property;

      (b)   In accord with the standards set forth in Section 8 of the Mining
            Lease, North Star shall clean up and restore all exploration and
            drill sites and other parts of the surrendered Doyon Property used
            in its operations under this Agreement and in doing so also shall
            perform all acts of reclamation as are necessary to comply with
            federal, state, and local laws in force at the time of abandonment
            consistent with Section 6.1 above, so as to reclaim the surrendered
            Doyon Property to approximately its original state and contour to
            the greatest extent practicable;


                                       32
<PAGE>

      (c)   North Star shall remove its buildings, plant machinery, equipment,
            wastes, and hazardous substances from the surrendered Doyon Property
            within ninety (90) days after such termination or abandonment; and

      (d)   North Star shall deliver to Doyon a quitclaim deed in recordable
            form forever releasing any and all interest in the surrendered Doyon
            Property to Doyon.

Upon the completion of all of the foregoing, North Star shall have no further
rights, obligations, or liabilities to Doyon under this Agreement, except for
those rights, obligations, or liabilities arising under Sections 6.2, 6.5, 6.7
(with regard to reclamation activities conducted after the termination of this
Agreement), 6.8, 6.11, 8, 13, and 17 of this Agreement.

15. FORCE MAJEURE

      To the extent that North Star is prevented from carrying out its
obligations hereunder with respect to a Block as contemplated in a Program and
Budget adopted pursuant to Section 4.3, by reason of any cause beyond the
reasonable control of North Star, including without limitation fire, accident,
flood, war, strike, civil disturbance, governmental action or inaction
(including but not limited to executive, legislative, judicial, or
administrative law, rule, policy, decision, decree, order, or failure to act),
failure of title, or non-performance of Doyon not otherwise resulting in a
breach of this Agreement, the performance of its obligations hereunder with
respect to that Block and its associated Area of Interest (except the making of
payments pursuant to Section 3) shall be suspended for the period that such
cause prevents North Star from so performing its obligations and the term of
this Agreement, the Option Period as to the Block and associated Area of
Interest to which the force majeure applies, and all other time restrictions as
to that Block and associated Area of Interest shall be extended by the number of
days as such cause exists. If the event of force majeure prevents North Star
from satisfying its obligations to perform field work during the field season,
the extension of the term of this Agreement and the Option Period shall be for a
number of days during the next succeeding field season equal to the number of
days that force majeure prevented field work. Exploration Expenditures not
completed during any year shall be added to the Exploration Expenditure
commitments in the next year, unless otherwise agreed. The party claiming force
majeure shall diligently pursue all reasonable means to terminate the event of
force majeure or otherwise resume its activities hereunder, but nothing herein
shall compel the settlement of any litigation or labor dispute. At Doyon's
option, this Agreement shall terminate with respect to any Block for which a
force majeure existed and is not cured (for whatever reason) for a period of 24
months.

16. ASSIGNMENT AND SUBLEASE

      (a)   Neither party may transfer an interest in this Agreement or the
            Doyon Property or any interest that is acquired hereunder or is
            subject hereto without first obtaining the express written consent
            of the non-transferring party; provided, however, that either party
            may, subject to the remaining terms and conditions of this Section
            16, transfer all of its interest to an Affiliate. The consent of the
            non-transferring party shall not be unreasonably withheld if the
            proposed Transferee has the financial


                                       33
<PAGE>

            capability and mining exploration experience in Alaska which
            justifies a reasonable expectation that such Transferee will be able
            to fulfill the obligations of the other party under this Agreement
            and the Mining Lease if the Option is exercised as to any Designated
            Area. The transferring party shall obtain and provide to the
            non-transferring party the proposed transferee's written agreement
            to assume and perform all obligations of the transferring party
            under this Agreement, including but not limited to the transfer
            restrictions in this Section 16. Any attempted transfer of an
            interest by any party in violation of the terms and provisions of
            this Section 16 shall be void ab initio and of no force and effect.
            North Star shall not mortgage, pledge, or otherwise encumber its
            interest in this Agreement or in the Doyon Property or any interest
            that is acquired hereunder or is subject hereto without specific
            reference to the fact that such mortgage, pledge, security interest,
            or other instrument shall be subject to all terms and provisions of
            this Agreement including specifically without limitation, Doyon's
            Royalty and Working Interest election rights under Section 13.2 and
            the contracting and hiring preferences set forth in Section 7. Doyon
            shall have the right to require North Star to disclose to Doyon all
            terms and conditions of any proposed transfer or assignment by North
            Star. The transferring party shall remain jointly and severally
            liable with the transferee for all obligations and liabilities
            accrued or incurred under the terms of this Agreement prior to the
            effective date of the relevant transfer. As used in this Section 16,
            the term "transfer" shall be broadly construed to mean the
            alienation of any interest whether by sale, exchange, gift, bequest
            or any other means, including the sale of stock, membership
            interest, partnership interest or other change in control in the
            entity holding any such interest, except that the term "transfer"
            shall not include Sale or Distribution to the Public. Any consent
            granted by and rights accruing to Doyon pursuant to this Section
            shall not affect the other obligations of North Star under this
            Agreement. Notwithstanding anything previously stated in this
            Section 16(a) to the contrary, (i) North Star recognizes Doyon's
            legitimate concern that if North Star should transfer an interest in
            this Agreement or the Doyon Property and as part of that transaction
            reserve or create a Reserved Interest the effect of that Reserved
            Interest may lessen the probability that the transferred, assigned
            or sublet interest would be developed into a mine and for that
            reason and other good and valuable reasons North Star agrees that it
            shall be prohibited from transferring an interest in this Agreement
            or the Doyon Property in a manner which shall reserve to or create
            in it or an Affiliate a Reserved Interest and (ii) accordingly, if
            the terms or conditions of any proposed transfer, assignment or
            sublease by North Star provide for the reservation to North Star or
            an Affiliate of North Star or the granting to North Star, an
            Affiliate of North Star or to any other party of a Reserved
            Interest, the parties agree that any withholding by Doyon of its
            consent to such proposed transfer, assignment or sublease shall be
            deemed conclusively to be reasonable.

      (b)   In the event that North Star intends to enter into any transaction
            with a non-Affiliate that will result in a transfer, assignment or
            sublease of all or part of North Star's rights in a Block for stock
            or equity interest or cash, it shall give Doyon


                                       34
<PAGE>

            reasonable advance notice of same and shall grant, and does hereby
            grant, Doyon the right to receive ten percent (10%) of such stock,
            equity interest or cash pursuant to the terms of the Amended and
            Restated Equity Participation Agreement (Exhibit E hereto).

17. CONFIDENTIALITY

      17.1 General. Except as otherwise provided in or pursuant to this Section
17, all information and data obtained or generated pursuant to or in connection
with this Agreement shall be owned by and the property of Doyon. During the term
of this Agreement, North Star shall have the right to use, solely for the
purpose of this Agreement, all data and information relating to the Doyon
Property owned or controlled by Doyon or obtained or generated pursuant to, or
in connection with, this Agreement by either Doyon or North Star. Except as
otherwise provided in or pursuant to this Section 17, all information obtained
pursuant to or in connection with this Agreement shall be held confidential by
Doyon and North Star. Except for information disclosed pursuant to Section
17.2(b)(3), Section 17.2(b)(4), Section 17.2(b)(5), Section 17.3(b)(3), Section
17.3(b)(4) or Section 17.3(b)(5), all information obtained or generated pursuant
to or in connection with this Agreement (including but not limited to all
monthly and annual reports prepared hereunder) shall recite on the first page
thereof the following paragraph, set off in such manner as will call attention
to the confidential nature of the contents thereof:

                   NOTICE OF DUTY TO MAINTAIN CONFIDENTIALITY

            The information contained herein is or may be the exclusive property
            of Doyon, Limited or North Star Exploration, Inc. Disclosure of such
            information is permitted only under certain circumstances set out in
            Section 17 of that certain Amended and Restated Option Agreement by
            and between Doyon, Limited and North Star Exploration, Inc. dated
            effective as of January 1, 2002 ("Option Agreement") and then only
            after the party receiving such information has agreed in writing to
            hold such information confidential and not to disclose it to others.
            Any person receiving this information is hereby placed on notice of
            such provisions and of the duties and obligations pertaining to such
            information.

      17.2 Disclosures During Term of Agreement.

      (a)   Except as otherwise provided in or pursuant to this Section 17.2,
            during the term of this Agreement all information and data obtained
            or generated pursuant to or in connection with this Agreement shall
            not be disclosed by Doyon or North Star to any third party or to the
            public, including press releases, without the prior written consent
            of the non-disclosing party.

      (b)   The consent required by this Section 17.2 shall not apply to a
            disclosure


                                       35
<PAGE>

            (i)   to an Affiliate, employee, consultant, contractor, or
                  subcontractor that has a bona fide need to be informed, or

            (ii)  to a governmental agency or to the public, whether pursuant to
                  a public offering or otherwise, which the disclosing party
                  believes in good faith is required by pertinent law or the
                  rules of any stock exchange.

In any case to which this Section 17.2(b) is applicable, the disclosing party
shall give notice to the other party of the contents of such disclosure at least
fifteen days prior to the making of such disclosure, unless the disclosing party
believes in good faith that a more rapid disclosure is required by pertinent law
or the rules of any stock exchange (in which event such notice shall be given as
much in advance as possible but in any event no later than contemporaneously
with the disclosure). As to any disclosure pursuant to Section 17.2(b)(i), only
such confidential information as such third party shall have a legitimate
business need to know shall be disclosed and such third party shall first agree
in writing to protect the confidential information from further disclosure by
executing a confidentiality agreement incorporating the nondisclosure
obligations of this Section 17.

      17.3 Disclosures After Expiration or Termination of Agreement.

      (a)   Except as otherwise provided in or pursuant to this Section 17.3 or
            in any Mining Lease executed pursuant to this Agreement, after the
            expiration or termination of this Agreement in full or as to any
            particular property (1) Doyon shall own and shall be free to
            disclose any or all information and data obtained or generated
            pursuant to or in connection with this Agreement to any third party
            or to the public, including press releases, without the consent of
            North Star but (2) North Star shall not disclose any information or
            data obtained or generated pursuant to or in connection with this
            Agreement to any third party or to the public, including press
            releases, without the prior written consent of Doyon, and shall
            return all information or data in its possession or controlled by it
            to Doyon.

      (b)   The consent of Doyon required by this Section 17.3 shall not apply
            to a disclosure by North Star

            (i)   to an Affiliate, employee, consultant, contractor, or
                  subcontractor that has a bona fide need to be informed, or

            (ii)  to any third party with whom North Star contemplates entering
                  into an agreement, or

            (iii) to any third party seeking to acquire, other than pursuant to
                  a public offering, an equity interest in North Star
                  Exploration or an Affiliate thereof pursuant to an offering
                  memorandum or similar document, or


                                       36
<PAGE>

            (iv)  to other regional Native Corporations which the disclosing
                  party believes in good faith is required by pertinent law, or

            (v)   to a governmental agency or to the public, whether pursuant to
                  a public offering or otherwise, which the disclosing party
                  believes in good faith is required by pertinent law or
                  regulation or the rules of any stock exchange.

In any case to which this Section 17.3(b) is applicable, North Star shall give
notice to Doyon of the contents of such disclosure at least five days prior to
the making of such disclosure, unless North Star believes in good faith that a
more rapid disclosure is required by pertinent law or the rules of any stock
exchange (in which event such notice shall be given as much in advance as
possible but in any event no later than contemporaneously with the disclosure).
As to any disclosure pursuant to Section 17.3(b)(i) or Section 17.3(b)(ii), only
such confidential information as such third party shall have a legitimate
business need to know shall be disclosed and such third party shall first agree
in writing to protect the confidential information from further disclosure by
executing a confidentiality agreement incorporating the nondisclosure
obligations of this Section 17.

      17.4 Exceptions To Consent Requirements. The limitations and restrictions
imposed by this Section 17 shall not apply to disclosures of information and
data that the disclosing person can establish was owned by the disclosing person
prior to the execution of this Agreement or information or data that the
disclosing person can establish is in the public domain other than as a result
of a disclosure in violation of any provision of this Section 17.

      17.5 Use of Doyon Logo and Name. No use of the Doyon logo or the name
"Doyon" or "Doyon, Limited" shall be made by North Star or any Affiliate of
North Star without the written permission of Doyon. Nothing herein shall prevent
North Star or Affiliates of North Star, in any written or oral communications,
from referring to Doyon by name when describing this Agreement or activities
undertaken pursuant to this Agreement, from describing any Doyon Property using
the same or a similar term, from describing activities undertaken pursuant to
this Agreement as "the Doyon Project", etc.


                                       37
<PAGE>

18. GENERAL PROVISIONS

      18.1 Notice. Any notices required or which may be given under this
Agreement shall be sent to the other party at the following addresses by
overnight courier (such as FedEx, UPS, or DHL) or by facsimile:

                  To North Star:      North Star Exploration, Inc
                                      12600 West Colfax, #C-500
                                      Lakewood, CO  80215-3735
                                      Attn: Walter W. Tyler
                                      Phone: (303) 986-0100
                                      Fax:   (303) 986-0500

                  with copies to:     Randy L. Parcel, Esq.
                                      Perkins Coie LLP
                                      1899 Wynkoop Street, Suite 700
                                      Denver, CO  80202
                                      Phone: (303) 291-2317
                                      Fax:   (303) 291-2400

                  To Doyon:           Doyon, Limited
                                      Doyon Plaza
                                      1 Doyon Place
                                      Suite 200
                                      Fairbanks, Alaska 99701-2941
                                      Attn:  Vice President, Lands and Natural
                                             Resources
                                      Phone: (907) 459-2030
                                      Fax:   (907) 459-2062

                  with a copy to:     General Counsel
                                      Doyon, Limited
                                      Doyon Plaza
                                      1 Doyon Place
                                      Suite 300
                                      Fairbanks, Alaska 99701-2941
                                      Phone: (907) 459-2000
                                      Fax:   (907) 459-2060

Changes of address shall be made by giving notice thereof to the other party as
allowed by this Section 18.1. Any notice so given shall be deemed to have been
received by the other party if sent by private courier service, or other
electronic means, on the date of delivery stamped upon the receipt or other form
of electronic transmission confirmation.


                                       38
<PAGE>

      18.2 Governing Law. This Agreement shall be governed and interpreted in
accordance with the laws of the State of Alaska.

      18.3 Arbitration.

      (a)   Any dispute, controversy, or claim arising out of or relating to
            this Agreement, or the breach, termination or invalidity thereof,
            shall be settled by arbitration in accordance with the American
            Arbitration Association's Commercial Arbitration Rules then in
            effect (the "AAA Rules"), only to the extent not inconsistent with
            the other provisions of this Section. The arbitration shall be
            governed by the United States Arbitration Act, 9 U.S.C.ss.ss. 1 et
            seq. (the ------- "Act"), and the laws of the State of Alaska shall
            be applied by the arbitrators in resolving the substantive issues
            raised by such dispute, controversy or claim. All proceedings in any
            such arbitration shall be held in Fairbanks or Anchorage, Alaska, as
            mutually agreed between the parties. Judgment upon the award
            rendered by the arbitrators may be entered, and such judgment
            enforced, in any court having jurisdiction thereof. Any dispute
            regarding whether any issue arising under this Agreement or any
            Mining Lease issued hereunder or in connection with the transactions
            contemplated herein is subject to arbitration under this Section
            shall be resolved by arbitration in the manner described in this
            Section.

      (b)   The party desiring arbitration shall give written notice to that
            effect to the other party and the parties shall attempt to agree on
            the appointment of a single arbitrator. If the parties have not so
            agreed within seven (7) days after service of such notice, each
            party shall notify the other party in writing of the name and
            address of the person designated to act as arbitrator on its behalf
            within seven days of such failure to agree. If either party fails to
            notify the other party of the appointment of its arbitrator within
            the time specified above, then the appointment of such party's
            arbitrator shall be made by the American Arbitration Association. If
            two arbitrators are designated or appointed, the two arbitrators
            shall together appoint a third arbitrator. If the two arbitrators
            are unable to agree upon the appointment of a third arbitrator
            within five days after both have been designated as appointed, the
            third arbitrator shall be selected by the American Arbitration
            Association. If an arbitrator fails, refuses or is unable to act, a
            new arbitrator shall be appointed as provided in the AAA Rules. Each
            arbitrator designated or appointed hereunder shall be impartial and
            competent and shall have recognized expertise in the subject matter
            of the arbitration such expertise to be with respect to such matters
            arising in Alaska where relevant.

      (c)   The parties shall utilize the discovery provisions of the Federal
            Rules of Civil Procedure for the Federal District of Alaska then in
            effect in all arbitrations hereunder; provided, however, that the
            time periods provided in such rules may be shortened in the
            discretion of the arbitrator or arbitrators so that all discovery is
            completed not later than one (1) week prior to the hearing. The
            arbitrator or arbitrators shall commence their hearing within three
            months after the


                                       39
<PAGE>

            appointment of the last arbitrator. Not later than one week prior to
            the hearing date, each party shall serve on each arbitrator and on
            the opposing party such party's statement of facts, issues and list
            of witnesses and exhibits, which exhibits shall be made available
            for inspection and copying at the location of the arbitration
            proceedings by the opposing party at all reasonable hours after 9
            a.m., local time on the day following the date of the service of
            such list. The arbitrator or arbitrators shall deliver their
            decision and award within one month after completion of the hearing
            and shall give prompt notice of their decision to each party
            accompanied by findings of fact and conclusions of law. Except as
            otherwise provided in the Act, any decision and award of a sole
            arbitrator or in which two arbitrators concur shall in all cases be
            final, binding and conclusive upon the parties and the parties agree
            to abide by the award. The time periods provided in this paragraph
            (c) may be shortened if, in the discretion of the arbitrator or
            arbitrators, the subject matter of the dispute, controversy or claim
            so justifies.

      (d)   The fees and expenses of the arbitrator appointed by or on behalf of
            one party shall be borne by such party. The fees and expenses of any
            sole arbitrator or of any third arbitrator and all other costs of
            the arbitration proceedings, including but not limited to costs of a
            transcript of all or any portion of such proceedings, shall be borne
            by both parties equally, unless the arbitrator or arbitrators
            otherwise decide.

      18.4 Entire Agreement. This Agreement, together with any and all recitals,
and attached Schedules and Exhibits, represents the entire agreement between the
parties and there are no other representations, warranties or other conditions
between the parties except as provided for in writing in this Agreement. Without
limiting the generality of the foregoing, this Agreement supersedes any prior
agreements between the parties hereto related to the subject matter herein,
including letter agreements and confidentiality agreements.

      18.5 Binding Effect. This Agreement shall be binding upon and inure to the
benefit of the respective permitted successors and assigns of the parties
hereto.

      18.6 Amendments and Waiver. This Agreement may be modified or amended only
by an agreement signed by both parties. Failure of either party to insist on
full performance of any obligation of the other party on one or more occasion
shall not waive, modify, release or alter in any manner such party's right to
insist upon full performance of such obligation in the future.

      18.7 Execution in Counterparts and by Facsimile. This Agreement and the
documents to be executed and delivered upon execution of this Agreement may be
executed in counterparts, and delivery thereof may be accomplished by
transmitting an executed signature page to the other party by facsimile;
provided that promptly after such delivery, originals of this agreement and all
such documents, executed by all parties thereto, shall be executed, acknowledged
where appropriate and shall be delivered to counsel for the respective parties.
This Agreement shall not become effective unless and until both parties execute
this Agreement, and all consideration to


                                       40
<PAGE>

be delivered to Doyon upon execution of this Agreement, as described in Section
3.1, has been delivered to Doyon.

      18.8 Headings. The paragraph headings in this Agreement are inserted for
convenience only and shall not be considered a part of this Agreement or used in
its interpretation.

      18.9 Time of Essence. Time shall be of the essence of this Agreement.

      18.10 Currency. All monetary amounts specified in this Agreement are
denominated in United States Dollars.

      18.11 Further Assurances. Each of the parties agrees that it shall take
from time to time such actions and execute such additional instruments as may be
reasonably necessary or convenient to implement and carry out the intent and
purpose of this Agreement. The parties recognize that the land acreage described
in Schedules A-1 through A-5, to this Agreement are very large. Accordingly,
they recognize that in preparing the Schedules A-1 through A-5 typographical
errors may have occurred. As a result, they further agree that to the extent
conflicts may exist between maps which are Exhibits and the legal descriptions
which are Schedules, the maps shall control. Also, in accordance with the intent
of this Section 18.11, the parties recognize that further review of the legal
descriptions contained in the Schedules is ongoing and that within a matter of
weeks changes to correct typographical errors may be presented for those
Schedules. If so, they will cooperate in the execution of an amendment to this
Agreement to reflect the proper legal descriptions or in the replacement of
those Schedules. The parties further agree, for themselves and their respective
successors and assigns, to cause their respective Affiliates, and the Affiliates
of their respective successors and assigns, to take all actions and execute all
additional documents as are reasonably necessary or appropriate to effectuate
the purpose and intent of this Agreement.

      18.12 Rule Against Perpetuities. All interests created under or pursuant
to this Agreement must vest within (a) twenty-one (21) years, less one (1) day,
after the death of the last survivor of the individuals executing this Agreement
or (b) such longer time as may be authorized by Alaska Statutes ss. 34.27.050 -
34.27.090, the Uniform Statutory Rule Against Perpetuities.


                                       41
<PAGE>

      18.13 Conflicts Between Exhibits and Schedules. In case of any conflict
between the maps included in the Exhibits hereto and the property descriptions
contained in the Schedules hereto, the Schedules shall control.

                                        DOYON, LIMITED

                                        By:
                                            ------------------------------------
                                                  Orie Williams
                                                  President and CEO


                                        NORTH STAR EXPLORATION, INC.

                                        By:
                                            ------------------------------------
                                                    Walter W. Tyler
                                                    President


                                       42
<PAGE>

                                    EXHIBIT B
                        CONVEYANCE OF OVERRIDING ROYALTY
  (Attached to and forming a part of the Amended and Restated Option Agreement
                        dated effective January 1, 2002
            between Doyon, Limited and North Star Exploration, Inc.)

RECORD THIS INSTRUMENT IN THE _______________ RECORDING DISTRICT

RETURN THIS INSTRUMENT TO:  Doyon, Limited
                            Doyon Plaza
                            1 Doyon Place
                            Suite 200
                            Fairbanks, Alaska 99701-2941
                            Attn: Vice President, Lands and Natural Resources

INDEX THIS INSTRUMENT AS FOLLOWS:

         Grantor: North Star Exploration, Inc.

         Grantee: Doyon, Limited

********************************************************************************

                        CONVEYANCE OF OVERRIDING ROYALTY

THIS CONVEYANCE OF OVERRIDING ROYALTY (this "Conveyance"), given this ____ day
of _____________, 200_, by NORTH STAR EXPLORATION, INC. ("North Star"), a Nevada
corporation the address of which is 12600 West Colfax, #C-500, Lakewood,
Colorado 80215-3735, to DOYON, LIMITED, an Alaska Native regional corporation
the address of which is Doyon Plaza, 1 Doyon Place, Suite 200, Fairbanks, Alaska
99701-2941.

                                   WITNESSETH:

THAT FOR and in consideration of $10.00 and other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, North
Star and Doyon hereby agree and act as follows:

1. Definitions

      As used in this Conveyance, unless the context otherwise requires, the
following terms have the following meanings:

      "Affiliate" means a person, partnership (limited, general or otherwise),
limited liability company, joint venture, corporation, or other entity or form
of enterprise which, whether through


                                      B-1
<PAGE>

equity ownership or through contractual obligations: (i) can control, either
directly or indirectly, or be controlled by a party hereto, or such party's
successors or assigns, or (ii) is under the common control, with a party hereto,
or such party's successors or assigns, directly or indirectly, of a third person
or other entity.

      "Alluvial Placer Gold Occurrences" means those gold occurrences which have
resulted from the operation of rivers and streams including the sediments laid
down in river and stream beds, flood plains, lakes, fans at the foot of mountain
slopes, and estuaries and which can be developed through use of traditional
placer mining techniques employing screening and trapping by use of gravity
separation only; if minerals need to be crushed or otherwise processed prior to
gravity separation, those materials and the gold found therein are not alluvial
placers.

      "Base Metals" means copper, lead, tin, zinc, and non-precious metals.

      "Fair Market Value" of Mineral Products shall be determined on a unit
basis as follows:

      (i)   Refined gold bullion shall be valued on the basis of the average of
            the daily London Bullion Brokers Second Gold Fixing for the five
            business days prior to the deposit of the bullion into North Star's
            account at the refiner's place of business;

      (ii)  Refined silver bullion shall be valued on the basis of the average
            of the daily Handy-Harman Noon Silver Quotation for the five
            business days prior to the deposit of the bullion into North Star's
            account at the refiner's place of business;

      (iii) Base Metals shall be valued on the basis of an agreed, recognized
            published index value for the particular metal, such as the London
            Metals Exchange ("LME"). In the absence of such agreed indexed
            value, the Fair Market Value shall be the proceeds actually received
            by North Star during the calendar quarter from the sale of such
            refined or processed metals, subject to Section 15 of the Lease Form
            in the case of agreements or arrangements between North Star and
            North Star's Affiliates;

      (iv)  Platinum Group Metals shall be valued on the greater of the average
            of the daily Englehard quotation for: [A] industrial platinum, or
            [B] industrial palladium, for the five business days prior to the
            deposit of the metal into North Star's account at the refiner's
            place of business; and

      (v)   As to all other Mineral Products (i.e., to the extent not covered in
            clauses (i), (ii) or (iii) above, the Fair Market Value shall be
            equal to the amount of the proceeds actually received by North Star
            during the calendar quarter from the sale of such other Mineral
            Products, subject to Section 15 of the Lease Form in the case of
            agreements or arrangements between North Star and North Star's
            Affiliates.


                                      B-2
<PAGE>

      "Feasibility Study" means a written report prepared by an independent
mining consultant selected by North Star and approved by Doyon (whose approval
shall not be unreasonably withheld) setting forth in detail an analysis of the
economic and commercial viability of conducting operations for the production
and sale of Mineral Products from the Lands that recommends that all or part of
the Lands should be brought into commercial production. It shall also describe
in detail the method by which commercial production should be achieved and
continued, including, where applicable, reasonably anticipated exploration costs
which a joint venture formed under the Option Agreement or Lease Agreement would
undertake to identify and quantify new mining reserves on the Lands and shall
also contain an analysis of applicable environmental and reclamation laws and an
estimate of the cost of complying with such laws. Such report shall be in such
form as is ordinarily necessary to satisfy substantial international financing
institutions for the purpose of determining the advisability of providing
project financing on a commercially competitive basis taking into consideration
all relevant criteria deemed to be both normal and prudent for the mining
industry in the United States. During the preparation of any Feasibility Study,
North Star shall make available to Doyon for review all drafts of the
Feasibility Study as they become available to North Star together with all data
upon which the Feasibility Study or drafts are based; provided, however, nothing
herein contained shall be deemed to give Doyon any right of approval with
respect to such drafts. Upon reasonable notice Doyon shall be invited to attend
all formal project review meetings between the consultant and North Star held in
connection with the preparation of any Feasibility Study.

      "Lands" means the particular lands depicted or described in Exhibit __ and
described on Schedule __ (Part 1) attached hereto [all of the lands included
within the Subject Property].

      ["Lease Agreement" means that certain Mining Lease dated ____________,
____, between Doyon and North Star, a memorandum of which was recorded on
__________, _____, at Book ____, Page ____, _____________ Recording District.]

      "Lease Form" means that certain Form of Mining Lease constituting Exhibit
F to the Option Agreement.

      "Mineral(s)" means all substances (whether metallic or non-metallic)
occurring naturally in the earth but excluding Other Minerals.

      "Mineral Products" means all Ores produced from the Subject Property which
are sold, processed, or refined for their Mineral content or their Other
Minerals content and all products derived from such processing or refining
including, without limitation, dore bullion, precipitates, and concentrates of
Minerals or Other Minerals.

      "Net Smelter Returns" means the Fair Market Value of Mineral Products,
less, but only to the extent actually incurred or paid by North Star, the
following (and only the following, without duplication):

      (i)   Charges and costs, if any, for transportation (including related
            storage and insurance costs) from North Star's mine, mill, or other
            processing or refining facility on the Subject Property to the
            places where the Mineral Products and


                                      B-3
<PAGE>

            Minerals are sold; plus charges and costs, if any, for
            transportation (including related storage and insurance costs) of
            Mineral Products to any contract mill or refinery and from there to
            the places where such Mineral Products are sold;

      (ii)  Smelter or refinery costs and charges, including assaying and
            sampling costs, umpire charges and penalties, if any, incurred upon
            smelting or refining Mineral Products. In the event smelting or
            refining is carried out in facilities owned or controlled, in whole
            or in part, by North Star, or by an Affiliate of North Star, charges
            and penalties for such operations shall mean the amount North Star
            would have incurred if such operations were carried out at
            facilities not owned or controlled by North Star then offering
            comparable services for comparable products on prevailing terms; and

      (iii) Sales, use, gross receipts, severance and other taxes, if any,
            payable with respect to severance, removal, sale, or disposition of
            Mineral Products but excluding any taxes on net income as well as
            any revenue or net proceed taxes.

With respect to heap leaching, in situ leaching or other solution mining
methods, in determining Net Smelter Returns there shall be no deduction
whatsoever for any processing, recovery or refining costs incurred up to the
point at which the final Mineral Product produced or refined by North Star is
obtained, including without limitation the costs of mining, crushing, dump
preparation, pad construction and preparation, distribution of leach solutions
or other mining and preparation costs, transportation of solutions or slurries
to the refining processes, refining of slurry or concentrates, preparation of
dore bullion or other refined Mineral Products for sale to a purchaser or
delivery for final treatment by a third party, and the costs of reclamation or
other environmental compliance relating to any of the foregoing.

      "Option Agreement" means that certain Amended and Restated Option
Agreement dated effective January 1, 2002, between Doyon and North Star, a
memorandum of which was recorded on ________, _____, at Book __, Page __,
____________ Recording District.

      "Ore" means all material produced from the Subject Property that contains
one or more Minerals and which in the sole discretion of North Star justifies
either (i) mining, extracting, or recovering from a place in the Subject
Property and selling or delivering to a processing plant or refiner for physical
or chemical treatment, or (ii) treating in situ in the Subject Property by
chemical, solution, or other methods; said term shall also include all
Mineral-bearing solutions, nature or introduced, recovered by or for North Star
from the Subject Property and sold, processed, or refined by or for North Star,
and all Mineral and non-Mineral components of all such materials and solutions.

      "Other Minerals" means all Alluvial Placer Gold Occurrences, geothermal
resources, sand, gravel, shot rock, aggregate, rock, building stone, limestone,
peat, coal, lignite, oil, gas, other liquid or gaseous hydrocarbons, and all
other substances occurring and producible naturally only as gases, liquids, or
fluids from wells.


                                      B-4
<PAGE>

      "Platinum Group Metals" means platinum, palladium, iridium, osmium,
rhenium and rhuthenium.

      "Precious Minerals" means gold, silver and other precious minerals (such
as diamonds) and any such by-product minerals produced from Ores, but not
including any Platinum Group Metals.

      "Subject Property" means the particular interests in the Lands owned by
North Star and described on Schedule __ (Part 2) attached hereto.

2. Conveyance

      North Star hereby GRANTS, CONVEYS and SPECIALLY WARRANTS (as set forth
below) to Doyon and its successors and assigns a royalty interest in and to the
Subject Property equal to the following, TO HAVE AND TO HOLD FOREVER:

      The amount, calculated from time to time, by subtracting (A) the royalties
      or other interests in Minerals, Other Minerals or Mineral Products derived
      from the Subject Property that were reserved by or are otherwise owed to
      the party or parties from whom North Star acquired the Subject Property or
      such party's or parties' predecessors-in-interest from (B) the Net Smelter
      Returns royalty that would be payable under Section 4.4 of the Lease Form
      if the Subject Property were subject to a lease in the form of the Lease
      Form; provided, however, that in no case shall the royalty payable to
      Doyon hereunder be less than one percent (1%) of the Net Smelter Returns
      derived from or that would be attributable to the Subject Property if the
      Subject Property were subject to a lease in the form of the Lease Form.

      North Star hereby SPECIALLY REPRESENTS, COVENANTS, and WARRANTS to Doyon
and its successors and assigns that (1) North Star owns the Subject Property
free and clear of any liens, encumbrances, or other interests of third parties
arising by, through, or under North Star, but not otherwise, (2) North Star has
the right and power to make and deliver this Conveyance, and (3) North Star
shall defend the title conveyed to Doyon by this Conveyance.

3. Other Provisions

      Doyon hereby acknowledges that North Star does not now and shall never
have any express or implied obligation to explore, develop, or mine the Lands.

      Doyon hereby acknowledges that North Star may use the Lands for any and
all purposes that North Star deems necessary or desirable, including but not
limited to the construction, use, and maintenance of tailings dams and ponds,
waste dumps, or other facilities necessary or desirable to support mining
operations on lands other than the Lands.

      If North Star ever elects to abandon any or all of the Subject Property,
North Star shall first offer such interests to Doyon, for no additional
consideration. Doyon shall have a 45-day


                                      B-5
<PAGE>

period in which to elect to receive a conveyance and assignment of such offered
interests. If Doyon timely elects to receive such a conveyance and assignment,
North Star shall promptly execute, acknowledge, and deliver the same to Doyon
and Doyon shall promptly accept such conveyance and assignment and expressly
assume in writing any and all obligations of North Star, if any, respecting such
interests.

      The grant made hereby is effective only with respect to the Subject
Property. If the Subject Property comprises less than 100% of the working
interest in the Lands, then the royalty payable to Doyon hereunder shall be
equal to the product of (A) the royalty that would be payable hereunder if the
Subject Property comprised 100% of the working interest in the Lands times (B)
the percentage of said working interest included in the Subject Property.

4. Notice of Right to Acquire Undivided Interest

      The parties to this Conveyance hereby notify all other persons that
pursuant to [Section 13.2(b) and Exhibit E of the Option Agreement] [Section 19
of the Lease Agreement] North Star has granted to Doyon the option to acquire an
undivided portion of the interest of North Star in the Subject Property, which
option is exercisable by Doyon upon the delivery to Doyon of a Feasibility Study
relating to the Subject Property.

GIVEN on the date first set forth above.

                                    NORTH STAR EXPLORATION, INC.

                                    By:
                                      ------------------------------------------
                                                      President

STATE OF ALASKA                     )
                                    ) ss.
BOROUGH OF _________                )

      On this ___ day of ___________, 200_, personally appeared
__________________, who acknowledged himself to be the President of North Star
Exploration, Inc., and who acknowledged before me that he, as such President,
being authorized so to do, executed the foregoing Conveyance of Overriding
Royalty for the purposes therein contained.

      In witness whereof I hereunto set my hand and official seal.

[ S E A L ]
                                        ----------------------------------------
                                        Notary Public

                                        My commission expires:
                                                              ------------------


                                      B-6
<PAGE>

                                    EXHIBIT C
                 THIRD PARTY PROPERTY WORKING INTEREST ELECTIONS
  (Attached to and forming a part of the Amended and Restated Option Agreement
                         dated effective January 1, 2002
            between Doyon, Limited and North Star Exploration, Inc.)

1. Doyon's Election.

      Within 150 days after North Star's submission to Doyon of (i) two (2)
copies of a Feasibility Study for a Mine to be developed within acquired Third
Party Property within the Area of Interest; (ii) an accounting of the
expenditures made by North Star on that acquired Third Party Property; and,
(iii) evidence of North Star's good faith intention to develop a Mine consistent
with the recommendations in the Feasibility Study expressed by, for example,
certified copies of the authorizing resolutions of the boards of directors of
North Star and all relevant Affiliates, Doyon may elect to participate in the
proposed Mine as a working interest participant at any level of working interest
between a minimum of ten percent (10%) of one hundred percent (100%) of the
interest acquired by North Star, notwithstanding any subsequent conveyance by
North Star to third parties and a maximum of twenty percent (20%) of one hundred
percent (100%) of such interest, by providing written notice to North Star. The
right to acquire such working interest shall be free and clear of any
encumbrances or burdens created by, through, or under North Star except for the
requirement to reimburse prior expenditures as provided in Section 2 of this
Exhibit C, and shall be a burden on any transfers of such interests by North
Star to Affiliates or to third parties. Doyon and North Star recognize the high
risks and uncertainties involved in the interpretation of any information
provided by North Star pursuant to a Feasibility Study. North Star's
interpretation or analysis of any information shall be made in good faith and
based on its expertise, provided however that North Star makes no
representations or warranties respecting the accuracy or completeness of any
information and shall not be liable or responsible to Doyon or third parties for
any damages or injury arising out of or resulting from any information or
reliance thereon.

2. Contribution by Doyon upon Election.

      If Doyon elects to participate in a proposed Mine after submission by
North Star of a Feasibility Study for a Mine, then within 60 days after its
election to participate Doyon shall contribute to a joint venture formed
pursuant to Section 3 of this Exhibit C, an amount as its initial contribution
equal to Doyon's required proportionate share of North Star's expenditures on
the relevant acquired Third Party Property from the effective date of the
acquisition of the Third Party Property calculated using the following equation:

                                  A = BC/(1-B)

where A equals Doyon's initial contribution amount due, B equals Doyon's chosen
percentage interest expressed as a decimal, and C equals North Star's cumulative
expenditures.


                                      C-1
<PAGE>

Such contribution shall be applied by the manager of the joint venture to pay
one hundred percent (100%) of venture expenses until such funds are exhausted,
with the income tax deductions for such expenses, if any, being allocated to
Doyon in Doyon's discretion. If Doyon fails to timely make the contribution
required by this Section 2, then its election to participate shall be null and
void and any joint venture prepared pursuant to Section 3 below shall be of no
further force and effect and Doyon shall, upon request, provide North Star with
evidence in writing, in recordable form, indicating that Doyon has no working
interest in the proposed Mine and no participating interest in any joint venture
prepared for the proposed Mine.

3. Negotiation of Joint Venture.

      The parties agree to negotiate in good faith a form of joint venture
agreement by not later than __________, 200_ to control the joint operation of
those areas in which Doyon elects to participate. If the parties are unable to
agree upon such a form, Model Form Mining Venture Agreement Form 5A published by
the Rocky Mountain Mineral Law Foundation ("Form 5A"), as amended from time to
time and modified to include the points listed below, shall serve as the basis
for the joint venture agreement between the parties. The parties contemplate
that, among other things, the joint venture agreement will provide as follows:

      (i)   North Star shall act as manager subject to removal by Doyon for
            breach of its duty of care as set forth in the current Form 5A or
            upon the occurrence of any such event as gives rise to a deemed
            offer to resign as manager under the current Form 5A;

      (ii)  a management committee, consisting of two representatives of Doyon
            and two representatives of North Star, shall be established to
            determine overall policy, objectives, procedural methods and actions
            under the agreement, with voting to be in accordance with the
            parties' respective participating interests;

      (iii) North Star, shall be entitled to charge the venture account in
            accordance with the Accounting Procedure to the current Form 5A, but
            the administrative charge set forth in Section 2.13 of said
            Accounting Procedure may not exceed the following percentage of
            "Allowable Costs" during any particular phase:


                                      C-2
<PAGE>

            After delivery of Feasibility Study and before
            Commercial Production, on Allowable Costs
            incurred through use of independent contractors:              1.5%

            After delivery of Feasibility Study and before
            Commercial Production, on all other Allowable Costs:          3.0%

            After Commercial Production has been achieved:                3.0%

     (iv)   there shall be a right of first offer provision, which shall be
            different from and separate from any rights of a party under that
            certain Equity Participation Agreement dated as of the same date as
            the Option Agreement, under which a party shall have the right to
            purchase the other party's interest in the joint venture upon any
            attempted transfer of interest or material default by the other
            party as well as a right to require a party desiring to transfer or
            to obtain project financing for its interest to make reasonable
            efforts to transfer or obtain project financing for the other
            party's interest in the joint venture simultaneously and on
            substantially similar terms and conditions, but such right of first
            refusal shall have no application to a party's Sale or Distribution
            to the Public (as defined in the Option Agreement) of all or part of
            such party's interest provided that such party offers the other
            party "piggyback" rights whereby it will include in such public sale
            or distribution the same proportion of the other party's interest in
            the joint venture as the proportion of the offering party's interest
            that is included in such sale or distribution;

     (v)    there shall be dilution of a party's participating interest on a
            pro-rata basis because of a timely election by the diluting party
            not to pay its proportionate share of costs or an equity reduction
            resulting from another cause, provided that if a party's
            participating interest drops below 5%, that party's participating
            interest shall be converted to a 2% net proceeds interest royalty;

     (vi)   the parties shall have the right to take in kind their share of
            production of Mineral Products from the Premises;

     (vii)  the agreement shall form a general partnership for a limited purpose
            under the laws of the State of Alaska and for federal and state tax
            purposes;

     (viii) record title to the acquired Third Party Property shall be held in
            the partnership name;

     (ix)   Alaska law shall govern the interpretation of the agreement; and

     (x)    there shall be a one (1) mile area of interest provision similar to
            the area of interest provision contained in the Mining Lease.


                                      C-3
<PAGE>

     (xi)   The parties intend that in using Form 5A they will incorporate
            necessary changes required by tax law changes as passed from time to
            time.


                                      C-4
<PAGE>

   Pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended
portions of this document have been omitted. The omitted portion has been filed
            separately with the Securities and Exchange Commission.


                                      D-1

<PAGE>



                                    EXHIBIT E
                              AMENDED AND RESTATED
                         EQUITY PARTICIPATION AGREEMENT
    (Attached to and forming a part of Amended and Restated Option Agreement
                     dated effective as of January 1, 2002
            between Doyon, Limited and North Star Exploration, Inc.)

      THIS AMENDED AND RESTATED EQUITY PARTICIPATION AGREEMENT (this
"Agreement"), dated effective as of May 27, 1997, but executed by the parties on
the dates shown below, is between Doyon, Limited and EMEX Corporation, a Nevada
corporation ("EMEX").

                                    RECITALS

      A. Doyon and North Star Exploration, Inc., a Nevada corporation, ("North
Star") have entered into an agreement (the "1997 Option Agreement") dated
effective May 27, 1997 and have amended and restated the 1997 Option Agreement
by that certain Amended and Restated Option Agreement dated effective January 1,
2002 (the "2002 Option Agreement").

      B. The purposes of North Star include exploration for and development of
minerals on land and interests owned by Doyon, or within the Area of Interest or
Buffer Zone (as defined in the 2002 Option Agreement) of the Doyon lands and
interests, in the State of Alaska.

      C. At the date of the execution of the 1997 Option Agreement, the
shareholders of North Star were David H. Peipers; The Cornerhouse Limited
Partnership, a New York limited partnership of which David H. Peipers is the
general partner; The Windsome Limited Partnership, a New York limited
partnership of which David H. Peipers is the general partner; and Universal
Equities Ltd., a Delaware corporation controlled by Milton E. Stanson and
Vincent P. Iannazzo. The said David H. Peipers, The Cornerhouse Limited
Partnership, The Windsome Limited Partnership, Universal Equities Ltd., Milton
E. Stanson and Vincent P. Iannazzo are herein referred to as the "Other
Investors."

      D. As a condition to entering into the 2002 Option Agreement, (i) EMEX has
agreed contemporaneously to entering into this Agreement, (ii) EMEX desires to
ratify Doyon's ten percent (10%) equity interest in each of North Star, Zeus
Consolidated Holdings, Inc., Platinum-Palladium Holdings, Inc., Alaska Energy
Fuels, Inc. and Northway Holdings Corporation (collectively the "Other
Entities"), (iii) Doyon desires to obtain the commitment of EMEX to allow Doyon
the opportunity to maintain its equity interest in North Star and the Other
Entites, and to acquire an interest in certain other entities in which EMEX or
the Other Entities may acquire an equity interest in the future, all on the
terms and conditions set forth herein, (iv) North Star and EMEX desire to grant
to Doyon the right to receive certain consideration in the event North Star
transfers, assigns or sublets an interest in the 2002 Option Agreement or the
Doyon


                                       E-1
<PAGE>

Property and North Star and EMEX are willing to grant these considerations to
Doyon as partial consideration for Doyon's execution of the 2002 Option
Agreement.

      NOW, THEREFORE, in consideration of the foregoing and the other
agreements, representations and covenants set forth below, the parties hereto
agree as follows:

      1.    Representation by EMEX. EMEX hereby covenants, represents and
            warrants to Doyon that (i) the Other Investors have exchanged all
            their interests in North Star for shareholder interests in EMEX,
            (ii) the Other Investors own no continuing interest in North Star
            other than through their interest in EMEX, the parent company of
            North Star, and (iii) EMEX is the successor of all equity interests
            in North Star formerly owned by the Other Investors.

      2.    Grant of Equity Interest in North Star. EMEX hereby ratifies and
            confirms its, or the Other Investors', grant to Doyon of a ten
            percent (10%) equity interest in North Star and agree, to the extent
            not already accomplished, they promptly shall deliver to Doyon stock
            certificates evidencing Doyon's equity interest in North Star.

      3.    Preemptive Rights in North Star. In the event that EMEX acquires an
            equity interest in North Star from North Star after the date of this
            Agreement, EMEX shall offer to Doyon the right to acquire, on the
            same terms and at EMEX's acquisition cost, that portion of EMEX's
            interest in the new equity of North Star sufficient to maintain
            Doyon's proportionate interest in the total equity of North Star
            then held by Doyon and EMEX in the aggregate to the proportion of
            such aggregate equity Doyon held immediately prior to EMEX's
            acquisition of the new equity interest in North Star. For purposes
            of this paragraph 3, Doyon's proportionate interest in the equity of
            North Star shall include any such equity interest Doyon acquires
            directly from North Star at the time EMEX acquires its new equity
            interest in North Star.

      4.    Participation in Other Entities. In the event that North Star, EMEX
            or the Other Entities, or any of them, acquire an equity interest in
            any entity other than North Star that holds or proposes to hold any
            mineral rights in the State of Alaska (or any entity that holds such
            rights) North Star or EMEX or the Other Entities, as the case may
            be, shall offer to Doyon the right to acquire, on the same terms and
            for the same acquisition cost, that portion of North Star's, EMEX's
            or the Other Entities' equity interest in the entity equal to the
            percentage interest of Doyon in the combined equity interest of
            Doyon and EMEX in North Star. The provisions of this paragraph 4
            shall not apply to acquisitions by North Star, EMEX or the Other
            Entities of (a) less than 1% of the equity in any publicly traded
            company, or (b) an equity interest in those companies holding the
            mineral rights listed on Schedule 1 attached hereto, unless any such
            company increases its interest in mineral rights in the State of
            Alaska after May 27, 1997. The parties recognize that pursuant to
            Section 3 of that certain Equity Participation Agreement dated


                                      E-2
<PAGE>

            May 27, 1997 among the parties hereto (the "Original Participation
            Agreement") the Other Investors or EMEX have heretofore granted
            equity interest to Doyon in the following entities in the following
            percentages:

              Entity                            Doyon Shares      % Ownership
              ------                            ------------      -----------
              North Star Exploration, Inc.         2,000,000               10%
              Zeus Consolidated                        2,500               10%
                 Holdings, Inc.
              Platinum Palladium                   2,000,000               10%
                 Holdings, Inc.
              Northway Holdings                          200               10%
                 Corporation
              Alaska Energy Fuels, Inc.            2,000,000               10%

            The parties intend that if pursuant to the Original Participation
            Agreement the Other Investors or EMEX fail to grant equity interests
            to Doyon in entities created by either EMEX or the Other Investors
            in accordance with the terms of the Original Participation
            Agreement, then EMEX shall promptly cause said grant to be made to
            Doyon and certificates evidencing the grant delivered to Doyon.

      5.    Procedures. Whenever North Star or EMEX is required to make an offer
            to Doyon under paragraphs 3 or 4 above, such offer shall be made in
            writing within 30 days of North Star's or EMEX's purchase, shall
            contain all of the information needed by Doyon to evaluate the
            offer, and shall be sent in accordance with the provisions of
            paragraph 9. If such notice is not provided, Doyon shall continue to
            have the right to purchase such equity interest until such notice is
            provided. Doyon shall have 30 days after receipt of the offer to
            purchase all, but not less than all, of the equity interests
            offered, and to pay for such interests by wire transfer to an
            account provided by the offeror in the notice of the offer.

      6.    Purchases by Other Investors. For purposes of this Agreement, North
            Star, EMEX or the Other Entities shall be deemed to have purchased
            equity interests as described in paragraphs 3 and 4 above if such
            purchases were made either directly by North Star, EMEX or such
            Other Entities or indirectly for their beneficial interest, which
            shall include any purchases for or on behalf of any person or entity
            controlled by, controlling, or under common control with, EMEX.

      7.    Registration and Sales Rights. To the extent permissible under
            applicable laws and regulations, EMEX hereby grants to Doyon all
            registration rights (demand, piggy back, or otherwise) and all other
            rights granted to EMEX by North Star or any of the Other Entities
            that assist or facilitates such holder's sale or other transfer of
            shares of North Star or the applicable entity, all with the
            intention of providing to Doyon the opportunity to sell or otherwise
            transfer its equity interest in North Star or the Other Entities
            equal to the opportunity to sell or otherwise transfer shares held
            by EMEX or the Other Entities. If EMEX desires to sell any

                                      E-3
<PAGE>

            of its shares, it shall promptly notify Doyon of its intention and
            shall provide Doyon with the opportunity to sell in the same
            transaction that percentage of Doyon's shares of North Star or such
            Other Entities equal to the percentage of EMEX shares that EMEX
            proposes to sell in the transaction. The rights of Doyon set out in
            the previous two sentences shall terminate at such time as Doyon's
            shares in North Star or in such Other Entities are freely tradeable
            on the Toronto Exchange or a comparable national Canadian or U.S.
            stock exchange, or other foreign stock exchange approved by the
            parties hereto.

      8.    Transfer Consideration. In the event that North Star elects pursuant
            and subject to the provisions of Section 16 of the 2002 Option
            Agreement to transfer, assign or sublet an interest in the 2002
            Option Agreement or the Doyon Property or any interest that is
            acquired thereunder or is subject thereto for cash consideration or
            a stock or equity interest, then EMEX and North Star agree that
            Doyon shall receive ten percent (10%) of such cash, stock and equity
            interest that is either distributed to North Star's shareholders or
            if not distributed, used by North Star for corporate purposes other
            than funding for the 2002 Option Agreement or any Mining Leases
            issued pursuant thereto. Any stock or equity interest received by
            Doyon pursuant to this paragraph 8 shall carry with it the same
            preemptive rights, participation rights, sales rights, registration
            rights and tag along rights granted to Doyon by this Agreement.

      9.    Notices. All notices, requests, demands and other communications
            provided for by this Agreement shall be in writing and shall be
            deemed to have been given when hand delivered, when received if sent
            by telecopier or by same day or overnight recognized commercial
            courier service (provided written or electronic confirmation of
            receipt is received) or three business days after being mailed in
            any general or branch office of the United States Postal Service,
            enclosed in a registered or certified postpaid envelope, addressed
            to the address of the parties stated below or to such changed
            address as such party may have fixed by notice:

                   To Doyon:

                   Doyon, Limited
                   Doyon Plaza
                   Suite 200
                   Fairbanks, Alaska 99701-2941
                   Attention:  Vice-President, Land and Natural Resources
                   Fax:  (907) 459-2062
                   Telephone:  (970) 459-2030

                            with copies to

                   General Counsel
                   Doyon, Limited
                   Doyon Plaza


                                      E-4
<PAGE>

                   Suite 300
                   Fairbanks, Alaska 99701-2941
                   Fax:  (907) 459-2060
                   Telephone:  (970) 459-2000

                            and

                   Holme Roberts & Owen LLP
                   1700 Lincoln, Suite 4100
                   Denver, CO 80203
                   Attention:  Thomas A. Richardson and Frank Erisman
                   Telecopier:  (303)866-0200
                   Telephone:  (303) 861-7000

                   To North Star:

                   North Star Exploration, Inc.
                   12600 West Colfax, #C-500
                   Lakewood, CO  80215-3735
                   Attn:  Walter W. Tyler
                   Fax:  (303) 986-0500
                   Telephone:  (303) 986-0100

                   To EMEX:

                   EMEX Corporation
                   12600 West Colfax, #C-500
                   Lakewood, CO  80215-3735
                   Attn:  Walter W. Tyler
                   Fax:  (303) 986-0500
                   Telephone:  (303) 986-0100


                                      E-5
<PAGE>

      10.   Miscellaneous.

            a.    Intention. This Agreement is intended (i) to provide Doyon
                  with the opportunity to maintain its proportionate interest in
                  North Star, (ii) to allow Doyon to acquire an equity interest
                  in other entities in which EMEX may invest that have purposes
                  similar to North Star, i.e., to acquire and develop mineral
                  interests in the State of Alaska, and (iii) to provide Doyon
                  with registration rights and sales rights for Doyon's equity
                  interests on a similar basis as EMEX and the Other Entities.
                  This Agreement shall be interpreted liberally to accomplish
                  such intention.

            b.    Governing Law. This Agreement shall be governed by the laws of
                  the State of Alaska.

            c.    Term. This Agreement shall terminate two years after the later
                  of (i) the date the 2002 Option Agreement is terminated; or
                  (ii) the date of termination of the last remaining Mining
                  Lease created pursuant to the 2002 Option Agreement.

            d.    Original Participation Agreement Superceded. The Original
                  Participation Agreement is hereby amended, replaced and
                  superceded in its entirety by this Agreement.

      IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first set forth above.

                                      DOYON, LIMITED


                                      By
                                        ----------------------------------------
                                                 Orie Williams
                                                 President and CEO
                                      Date Executed:   _______________, 2002

                                      NORTH STAR EXPLORATION, INC.


                                      By
                                        ----------------------------------------
                                                 Walt W. Tyler
                                                 President
                                      Date Executed:   _______________, 2002


                                      E-6
<PAGE>

                                      EMEX CORPORATION, a Nevada corporation


                                      By
                                        ----------------------------------------
                                                 President
                                      Date Executed:   _______________, 2002




                                      E-7
<PAGE>

                                   SCHEDULE 1

                          EXISTING OWNERSHIP INTERESTS

                 (Attached to and forming a part of Amended and
                     Restated Equity Participation Agreement
                          dated effective May 27, 1997
                   between Doyon, Limited and EMEX Corporation

      The gold and other mineral claims in the Chandalar and Talkeetna Districts
set forth as follows:

      1.    Chandalar Claims

            Auri Nos. 1-143; and

      2.    Talkeetna Claims

            OC Nos. 1-78.



                                      E-8