Document:

<PAGE>   1
                                                                  EXHIBIT 10.8.3

     [SASKATCHEWAN                               PETROLEUM AND NATURAL GAS LEASE
     ENERGY AND MINES LOGO]                                  MARSDEN

Withdrawn from: 06-Feb-2001 Sale PCL483                   PN48362

This Agreement, effective 06-Feb-2001

BETWEEN:

HER MAJESTY THE QUEEN in Right of the Province of Saskatchewan, as represented
by the Minister of Energy and Mines, (the "Lessor").

                                     -and-

GEOCAN ENERGY INC.                                         70.0000%

TIMBERWOLF ENERGY INC.                                     20.0000%

TIMBERWOLF RESOURCES LTD.                                  10.0000%
the ("Lessee")

GRANT

1.  In consideration of the rents and royalties reserved and excepted in this
Lease; and subject to:

       (a) the terms and conditions of this Lease; and

       (b) The Crown Minerals Act (the "Act") and any applicable regulations
(the "Regulations") made or continued under that Act, including but not limited
to The Petroleum and Natural Gas Regulations, 1969 (the "Petroleum
Regulations"), as that Act or those Regulations may be amended, revised, or
substituted from time to time.

the Lessor grants and leases to the Lessee the right to explore for, work,
recover, remove, and dispose of, the petroleum and natural gas within the
meaning of the Petroleum Regulations, (the "Petroleum"), insofar as the
Petroleum is the property of the Lessor and the Lessor has the right to grant
the same, that may be found within, upon or under the following lands (the
"leased area"):

<TABLE>
<CAPTION>
LOCATION    SEC    TWP    RGE    MER

PETROLEUM & NATURAL GAS FROM THE SURFACE TO THE TOP PRECAMBRIAN
<S>         <C>    <C>    <C>    <C>
   01        4     45     28      3

   02        4     45     28      3 (FRACTION)

   07        4     45     28      3 (FRACTION)

   08        4     45     28      3

   09        4     45     28      3

   10        4     45     28      3 (FRACTION)

   15        4     45     28      3 (FRACTION)

PETROLEUM & NATURAL GAS FROM THE BASE MANNVILLE GROUP TO THE TOP PRECAMBRIAN

   16        4     45     28      3

TOTAL HECTARES:   105.22             Total Acres:  260.00      (more or less)
</TABLE>

HERITAGE SENSITIVE

TERM
2. The term of this Lease shall be for a period ending five years from the
first day of April, 2001, provided that this Lease will be continued at the
expiration of this term if the requirements for continuance in the Petroleum
Regulations have been satisfied by the Lessee.

                                  LESSEE COPY
<PAGE>   2

                                      -2-

ROYALTY

3. In respect to all Petroleum produced, saved or recovered from the
leased area, there is hereby excepted and reserved to the Lessor the royalty
upon the Petroleum that is prescribed by the Act and the Regulations, which
royalty shall be paid or delivered by the Lessee to the Lessor in the manner and
time that is so prescribed.

NO SURFACE RIGHTS

4. This Lease does not convey to the Lessee any right or interest in the surface
of the leased area or any mineral other than the Petroleum granted by this
Lease.

RATES, TAXES & ASSESSMENTS

5. The Lessee shall pay all rates, taxes and assessments that may be charged or
be payable during the term, or the continuation of, this Lease, in respect of
the leased area and the operations under this Lease.

COMPLIANCE WITH LAWS

6. The Lessee shall comply with the Act and the Regulations and all other laws
in force in the Province of Saskatchewan applicable to the Lessee's operations
under this Lease, including, without limiting the generality of the foregoing,
laws relating to occupational health and safety, environmental and public
protection and safety, resource conservation, management and development, and
surface rights.

ACTS AND REGULATIONS - INCORPORATION INTO LEASE

7(1). The Act and the Regulations shall be deemed to be incorporated into, and
form part of the terms and conditions of this Lease. Where there is any conflict
between this Lease and the Act and the Regulations, the Act and the Regulations
shall govern.

7(2). The Lessee acknowledges and agrees that its rights, interests, duties and
obligations under this Lease shall be deemed to be amended or varied, in whole
or in part, in accordance with any amendments to, or substitutions of, the Act
and the Regulations, including, without limiting the generality of the
foregoing, amendments or substitutions made to the Act or the Regulations after
the execution or issuance of this Lease or any renewal, continuation, or
substitution of this Lease.

OPERATIONS

8(1). The Lessee shall conduct all operations under this Lease in a diligent,
careful and workmanlike manner and shall take all reasonable and necessary steps
to prevent injury and damage to life and property.

8(2). The Lessee shall not unduly interfere with other petroleum and natural gas
operations or other mining operations in the leased area, or in any manner cause
undue public or private damage, inconvenience or nuisance.

POOLING

9(1). The Lessee is authorized to pool the leased area or part thereof with
other mineral lands to complete a drainage unit.

9(2). In the event of such pooling:

     (a) the Lessee shall promptly enter into an Addendum agreement with the
     Lessor, in a form prescribed by the Lessor, which Addendum shall describe
     the areas to be pooled and the ratio mentioned in clause 9(2)(b); and

     (b) the royalties excepted and reserved in this Lease shall be calculated
     and paid on the basis of the ratio that the surface area of the leased area
     included in the pooled drainage unit bears to the total surface area of the
     mineral lands in the pooled drainage unit.

9(3). Drilling operations on, or production of petroleum from, any mineral lands
in the pooled drainage unit shall have the same effect in continuing this Lease
in force and effect as if such operations or production were upon or from the
leased area included in the pooled drainage unit.

CANCELLATION

10(1). Notwithstanding anything else in this Lease, this Lease may be cancelled
by the Lessor if there has been a breach by the Lessee of any of the provisions
of this Lease or of any of the provisions of the Act or the Regulations relating
to this Lease.

10(2). Unless the Regulations provide for the automatic lapse of this Lease, the
Lessor shall not cancel this Lease pursuant to clause 10(1) unless the Lessor
has given written notice to the Lessee that this Lease may be cancelled and the
Lessee has not remedied or commenced to remedy the default to the satisfaction
of the Lessor within sixty (60) days after receipt of the notice by the Lessee.

10(3). Any right, including any right of action, of the Lessor against the
Lessee in respect of any breach or default shall not be prejudiced, lost, or
merged by the cancellation of this Lease and the Lessor shall have the same
remedies for the recovery of any royalties, rents, payments or damages due or
accruing due at the time of cancellation as if this Lease remained in full force
and effect.

TERMINATION - LESSOR'S RIGHTS

11(1). On the termination of this Lease by cancellation, surrender, or
expiration, the Lessee shall comply with all directions or orders of the Lessor
or any other official of the Province of Saskatchewan respecting the
preservation, clean up, and restoration of the leased area and facilities in the
leased area with respect to operations conducted by or on behalf of the Lessee.

11(2). Any costs incurred by the Lessor as a result of the Lessee's failure to
comply with any direction or order mentioned in clause 11(1), which failure
shall be communicated to the Lessee, shall be a debt due by the Lessee to the
Lessor and may be recovered by the Lessor as provided for by law.

WAIVER

12. No waiver by the Lessor of a breach by the Lessee of any covenant,
obligation, condition, restriction or stipulation contained in this Lease, in
the Act, or in the Regulations, shall take effect or be binding upon the Lessor
unless such waiver is expressed in writing by the Lessor, and any waiver so
expressed shall apply only to the particular breach so waived and shall not
limit or affect the Lessor's rights with respect to any other or future breach.
<PAGE>   3

                                      -3-

INDEMNITY

13.  The Lessee shall keep harmless and indemnify the Lessor, its Ministers,
officials, agents and employees, past, present and future, from and against all
actions, suits, claims and demands arising out of or in connection with the
operations carried on by the Lessee, its employees, agents, licensees and
contractors, deriving from this Lease.

ERRORS

14.  The Lessor may at any time by notice in writing to the Lessee revise this
Lease to correct errors.

LESSOR

15.  For the purposes of this Lease, "Lessor" includes any person appointed by
the Lessor to perform and exercise any of the duties imposed and powers
conferred by this Lease, the Act and the Regulations.

NOTICES

16.  Any notice or document required to be given or served pursuant to this
Lease, the Act or the Regulations shall be given or served by personal service
or registered mail to:

                         Saskatchewan Energy and Mines
                         1914 Hamilton Street
                         REGINA, Saskatchewan S4P 4V4

In the case of the Lessee, at the address for service as indicated by the
records of the department pursuant to Section 82 of the Petroleum Regulations.

ENUREMENT

17.  This Lease shall enure to the benefit of and shall be binding upon the
parties to this Lease and their respective heirs, executors, administrators,
successors and assigns.

HEADINGS

18.  The headings used in this Lease are for convenience of use only and shall
not be considered in the interpretation of this lease.

IN WITNESS WHEREOF the Lessor and the Lessee have executed this Lease.
SIGNED, SEALED AND DELIVERED

                                    /s/ [ILLEGIBLE]
                                    --------------------------------------------
                                    LESSOR
                                    Director of Geology & Petroleum Lands Branch

                                    /s/ WAYNE WADLEY
-----------------------------       --------------------------------------------
Witness                             LESSEE
with affidavit                      with seal        [ILLEGIBLE]

                                    /s/ WAYNE WADLEY
                                    --------------------------------------------
                                    LESSEE           [ILLEGIBLE]

                                    /s/ WAYNE WADLEY
                                    --------------------------------------------
                                    LESSEE<PAGE>   1
                                                                    EXHIBIT 10.9

[ALBERTA LOGO]
RESOURCE DEVELOPMENT

                        PETROLEUM AND NATURAL GAS LEASE

                                 No. 0499120101

Term Commencement Date:

1999 December 02

Lessee:

GEOCAN ENERGY INC.                                                   70.0000000%
                                                              undivided interest

TIMBERWOLF ENERGY INC.                                               20.0000000%
                                                              undivided interest

TIMBERWOLF RESOURCES LTD                                             10.0000000%
                                                              undivided interest

<PAGE>   2

                                      -2-

     WHEREAS Her Majesty is the owner of the minerals in respect of which
rights are granted under this Lease;

     THEREFORE, subject to the terms and conditions of this Lease, Her Majesty
grants to the Lessee, insofar as Her Majesty has the right to grant the same,
the exclusive right to drill for and recover the Leased Substances within the
Location, together with the right to remove from the Location any Leased
Substances recovered, for the term of five years computed from the Term
Commencement Date and, subject to the Mines and Minerals Act, for so long after
the expiration of that term as this Lease is permitted to continue under that
Act.

     RESERVING AND PAYING to Her Majesty,

     (a)  in respect of each year during which this Lease remains in effect, a
          clear yearly rental computed at the rate prescribed by, and payable in
          accordance with, the Mines and Minerals Act, and

     (b)  the royalty on all Leased Substances recovered pursuant to this Lease,
          that is now or may hereafter from time to time be prescribed by, and
          that is payable in accordance with, the Mines and Minerals Act, such
          royalty to be calculated free of any deductions except those that are
          permitted under the Mines and Minerals Act.

1(1) In this Lease, a reference to the Mines and Minerals Act or to any other
     Act of the Legislature of Alberta referred to in section 2(2)(b) of this
     Lease shall be construed as a reference to

     (a)  that Act, as amended from time to time,

     (b)  any replacement of all or part of that Act from time to time enacted
          by the Legislature, as amended from time to time, and

     (c)  any regulations, orders, directives or other subordinate legislation
          from time to time made under any enactment referred to in clause (a)
          or (b), as amended from time to time.

 (2) In this Lease,

     (a)  "Her Majesty" means Her Majesty in right of Alberta, as represented by
          the Minister of Resource Development of the Province of Alberta;

     (b)  "Leased Substances" means the minerals described under the heading
          "Description of Location and Leased Substances" in the Appendix to
          this Lease;

     (c)  "Location" means the subsurface area or areas underlying the surface
          area of the Tract and described in the Appendix to this Lease under
          the heading "Description of Location and Leased Substances";
<PAGE>   3
                                      -3-

         (d) "Term Commencement Date" means the date shown on the first page
              of this Lease as the Term Commencement Date;

         (e) "Tract" means the tract or tracts of land described under the
              heading "Description of Location and Leased Substances" in the
              Appendix to this Lease.

2. This Lease is granted upon the following conditions:

     (1) The Lessee shall pay to Her Majesty the rental and royalty reserved
         under this Lease.

     (2) The Lessee shall comply with the provisions of

         (a) the Mines and Minerals Act, and

         (b) any other Acts of the Legislature of Alberta that prescribe, apply
             to or affect the rights and obligations of a lessee of petroleum
             and natural gas rights that are the property of Her Majesty, or
             that relate to, apply to or affect the Lessee in the conduct of its
             operations or activities under this Lease.

     (3) The provisions of the Acts referred to in subsection (2) of this
         section are deemed to be incorporated in this Lease.

     (4) In the event of conflict between a provision of this Lease and a
         provision referred to in subsection (2) of this section, the latter
         provision prevails.

     (5) The Lessee shall not claim or purport to exercise any rights,
         prerogatives, privileges or immunities that would otherwise exempt the
         Lessee from compliance with any of the provisions of the Mines and
         Minerals Act or of any other Act of the Legislature of Alberta referred
         to in subsection (2)(b) of this section.

     (6) Natural gas produced pursuant to this Lease shall be used within
         Alberta unless the consent of the Lieutenant Governor in Council to
         its use elsewhere is previously obtained.

     (7) The Lessee shall keep Her Majesty indemnified against

         (a) all actions, claims and demands brought or made against Her Majesty
             by reason of anything done or omitted to be done, whether
             negligently or otherwise, by the Lessee or any other person in the
             exercise or purported exercise of the rights granted and duties
             imposed under this Lease, and

         (b) all losses, damages, costs, charges and expenses that Her Majesty
             sustains or incurs in connection with any action, claim or demand
             referred to in clause (a).
<PAGE>   4
                                      -4-

(8)  The use in this Lease of the word "Lessee", "Lease", "Leased Substances"
     or "rental," or of any other word or expression,

     (a)  does not create any implied covenant or implied liability on the part
          of Her Majesty, and

     (b)  does not create the relationship of landlord and tenant between Her
          Majesty and the Lessee for any purpose.

(9)  This Lease is also subject to the special provisions, if any, contained in
     the Appendix to this Lease.

EXECUTED on behalf of the Minister of Resource Development of the Province of
Alberta at Edmonton, Alberta.

                                           /s/ AMY [ILLEGIBLE]
                                           -----------------------------------
                                           For Minister of Resource Development
                                           on behalf of Her Majesty
<PAGE>   5
                                      -5-

                                    APPENDIX

                                       TO

                          5 YEAR PLAINS PETROLEUM AND
                        NATURAL GAS LEASE NO. 0499120101

AGGREGATE AREA:

80 HECTARES

DESCRIPTION OF LOCATION AND LEASED SUBSTANCES:

4-01-049:  14SW,L14

PETROLEUM AND NATURAL GAS TO THE BASE OF THE MANNVILLE GRP
AS DESIGNATED IN DRRZD 4
INTERVAL: 2 557.00 - 2 985.00 FEET
KEY WELL: 00/06-16-041-08W4/0
LOG TYPE: INDUCTION ELECTRICAL

SPECIAL PROVISIONS:

NIL

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