<PAGE>

                                                                    EXHIBIT 3.72


                            SUBSCRIPTION AGREEMENT

                        (THE "SUBSCRIPTION AGREEMENT")

                              OPUS MINERALS INC.


The undersigned (the "Subscriber") hereby subscribes for and agrees to purchase
680,000 units (the "Units") of Opus Minerals Inc. (the "Company"), each unit
comprised of one common share and one common share purchase warrant of the
Company, at a price of US $2.25 per Unit (the "Subscription Price"), for
aggregate consideration of US $1,530,000 all on the terms and subject to the
conditions set forth in Schedule A attached hereto.


--------------------------------------------------------------------------------
                            EXECUTION BY SUBSCRIBER

<TABLE>
<S>                                          <C>
                                             Ming Capital Enterprises
                                             Name of Subscriber

/s/ M. Montanari                             50 Shirley Street
----------------
Signature of Individual Subscriber or        P.O. Box N7755
Authorized Signatory of Subscriber           Nassau, Bahamas
(if Subscriber is not an individual)         Address of Subscriber

                                             Marco Montanari
                                             Name of Contact Person, if Subscriber not an individual

                                             (242)    326-5528
                                             Telephone Number of Subscriber or Contact Person

                                             (242)  328-2935
                                             Facsimile Number of Subscriber or Contact Person
-----------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------
</TABLE>

Executed by the Subscriber this 24/th/ day of July, 2000.
<PAGE>

Please complete the following section ONLY if you require the certificate(s)
representing the Securities to appear in the name of an intermediary, such as
your broker, or require the certificate(s) to be delivered to an address other
than that shown on page 1.

--------------------------------------------------------------------------------
REGISTRATION INSTRUCTIONS              DELIVERY INSTRUCTIONS
--------------------------------------------------------------------------------


Name to appear on certificate(s)       Name and account reference, if applicable


--------------------------------       ---------------------------------------


Account reference, if applicable       Contact Person


Address of Intermediary                Address for Delivery


--------------------------------       ----------------------------------------

                                       (-----)---------------------------------
                                       Telephone Number of Contact Person

-------------------------------------------------------------------------------

ACCEPTED by the Company this 8/th/ day of August, 2000.

OPUS MINERALS INC.



Per:      /s/ S. J. Hall
         ----------------------
         Authorized Signatory
<PAGE>

                                      -3-


                                  SCHEDULE A

In consideration of the covenants and agreements herein, and the payment of one
dollar ($1.00) made by each party to the other, the receipt and sufficiency of
which is acknowledged by each party, the parties agree as follows:

(1)  Offering
     --------

     The undersigned acknowledges that the Company is offering the Units on a
private placement basis. Subject to any requisite regulatory approval, the
Company will sell the Units to the undersigned on the terms and conditions set
forth herein. A copy of the term sheet outlining the features of the Units is
attached hereto as Appendix "A" provided, however, that in the event of any
inconsistency between Appendix "A" and this Subscription Agreement, the
provisions of this Subscription Agreement shall prevail.

(2)  Description of Units
     --------------------

     The Units herein subscribed for form part of a larger offering of up to
680,000 Units to be issued by the Company, each Unit comprising:

     (1)  one common share (the "Shares") of the Company; and

     (2)  one common share purchase warrant (the "Purchase Warrants"), each
          whole Purchase Warrant entitling the holder thereof to purchase one
          common share (the "Warrant Shares") of the Company on or before the
          second anniversary following the Closing Date, as defined below, at an
          exercise price of US $3.00 per Warrant Share.

(The Shares, Purchase Warrants and Warrant Shares are hereinafter collectively
referred to as the "Underlying Securities".)

2.   Payment
     -------

     The Subscription Price must accompany this subscription and shall be made
by cheque or bank draft in US dollars and payable to Opus Minerals Inc., In
Trust, at par in Toronto, Ontario.

3.   Registration and Delivery Instructions
     --------------------------------------

     The Subscriber must complete, sign and return by courier to Opus Minerals
Inc., Attention: Elizabeth Kirkwood, at Suite 745, 1 First Canadian Place,
Toronto, Ontario, M5X 1E2:

     (1)  an executed copy of this Subscription Agreement;
<PAGE>

                                      -4-

     (2)  any other documents required pursuant to subparagraph 7(r); and

     (3)  the payment referred to in paragraph 2 hereof.

     The Subscriber (or if applicable, others for whom it is contracting
hereunder) shall complete, sign and return to the Company as soon as possible on
request by the Company any other documents, questionnaires, notices and
undertakings as may be required of the Subscriber by regulatory authorities and
applicable law.

4.   Closing
     -------

     The closing for the transactions contemplated herein (the "Closing") will
be completed at the offices of Weir & Foulds at 130 King Street West, Suite
1600, Toronto, Ontario, M5X 1J5 or at such other place as the Company and the
Subscriber shall agree at 10:00 a.m. (Toronto Time) (the "Closing Time") on July
___, 2000 or such earlier or later date or time as the Company and the
Subscriber may agree (the "Closing Date"). The transactions contemplated herein
may close in one or more subsequent tranches after the initial Closing Date.

     This executed Subscription Agreement is open for acceptance or rejection in
whole or in part by the Company in its absolute discretion in each case at any
time prior to the Closing Time, notwithstanding prior receipt by the Subscriber
of notice of acceptance of the Subscriber's subscription. Confirmation of
acceptance or rejection of a subscription will be forwarded to the Subscriber
promptly after acceptance or rejection has been made. If this subscription is
rejected in whole and if the Subscriber has delivered a certified cheque or bank
draft representing the Subscription Price for the Units, then such cheque or
bank draft will be promptly returned to the Subscriber without deduction or
interest. If this subscription is accepted only in part and the Subscriber has
delivered a certified cheque or bank draft as aforesaid, a cheque representing
the portion of the Subscription Price for that portion of the Subscriber's
subscription for Units which is not accepted will be promptly returned to the
Subscriber without interest. By accepting a subscription in whole or in part the
Company agrees that the Subscriber will be entitled to the benefits of the
representations, warranties and covenants of the Company contained herein.

     Certificates representing the Shares (individually, a "Share Certificate",
and collectively, the "Share Certificates") and Purchase Warrants (individually,
a "Purchase Warrant Certificate", and collectively, the "Purchase Warrant
Certificates") will be available for delivery on the Closing Date against
payment of the aggregate Subscription Price in the manner specified above.

5.   Prospectus Exemptions
     ---------------------
     The sale and delivery of the Underlying Securities comprising the Units to
the Subscriber (or others for whom it is contracting hereunder) is conditional
upon such sale being exempt from the requirements as to registration and exempt
from the requirement to file a prospectus as defined in applicable securities
legislation or upon the issuance of such rulings, orders, consents or approvals
as may be required to permit such sale without the requirement of filing a
prospectus.
<PAGE>

                                      -5-

     The Subscriber on its own behalf (or on behalf of others for whom it is
contracting hereunder) represents, warrants and covenants to the Company(and
acknowledges and agrees that the Company and its counsel are relying thereon)
that:

     (1)  it (or others for whom it is contracting hereunder) has received a
          term sheet in the form attached hereto as Appendix A setting out the
          principal terms of this Subscription Agreement and the offering of
          Units.

     (2)  it (or others for whom it is contracting hereunder) has not been
          provided with, nor has it requested, nor does it have any need to
          receive an offering memorandum as defined in applicable securities
          legislation (an "Offering Memorandum") or sales or advertising
          literature or any other documents (other than annual financial
          statements, interim financial statements or any other document the
          content of which is prescribed by statute or regulation) describing
          the business and affairs of the Company which has been prepared for
          delivery to and to be reviewed by prospective purchasers in order to
          assist these purchasers in making an investment decision in respect of
          the Units;

     (3)  in making its decision to execute this subscription and purchase the
          Units (on its own behalf or on behalf of those for whom it is
          contracting hereunder) it has relied solely upon publicly available
          information relative to the Company and such decision has not been
          based upon any verbal or written representations as to fact or
          otherwise made by or on behalf of the Company;

     (4)  the sale of the Units was not accompanied by nor solicited through any
          advertisement in printed public media, radio, television or
          telecommunications, including electronic display;

     (5)  it (or others for whom it is contracting hereunder) has been
          independently advised that the Units are being offered for sale only
          on a "private placement" basis and that the sale and delivery of the
          Underlying Securities comprising the Units to the Subscriber (or
          others for whom it is contracting hereunder) are conditional upon such
          sale being exempt from the requirement to file a prospectus and the
          requirement to deliver an offering memorandum under any applicable law
          relating to the sale of the Units or upon the issuance of such orders,
          consents or approvals as may be required to permit such sale without
          the requirement of filing a prospectus or delivering an offering
          memorandum; and has further been independently advised as to
          applicable resale restrictions in the jurisdiction in which it
          resides, confirms that no representation has been made to it by or on
          behalf of the Company with respect thereto, acknowledges that it is
          aware of the characteristics of the Underlying Securities comprising
          the Units, the risks relating to an investment therein and of the fact
          that it (or others for whom it is contracting hereunder) may not be
          able to resell the Units and Underlying Securities except in
          accordance with exemptions under applicable securities legislation and
          regulatory policy.
<PAGE>

                                      -6-

6.   Representations, Warranties and Covenants of the Subscriber
     -----------------------------------------------------------

     The Subscriber (on its own behalf or on behalf of others for whom it is
contracting hereunder) hereby represents, warrants and covenants to the Company
(and acknowledges that the Company and its counsel are relying thereon), which
representations and warranties shall survive closing, that:

     (1)  In the case of a purchase by the Subscriber of Units as principal for
          its own account and not for the benefit of any other person (within
          the meaning of applicable securities legislation), the Subscriber is
          purchasing the Units as principal for its own account, and not for the
          benefit of any other person or company, and not with a view to the
          resale or distribution of all or any of the Units, and this
          Subscription Agreement has been authorized, executed and delivered by,
          and constitutes a legal, valid and binding agreement of the
          Subscriber, and if the Subscriber is subject to applicable securities
          legislation of a Province of Canada, the Subscriber is:

          (1)  one of the following:

               (1)  if subject to applicable securities legislation of the
                    Province of Alberta, a bank, a loan corporation, trust
                    corporation, treasury branch or credit union or a subsidiary
                    of such an entity where such entity owns beneficially all of
                    the voting securities of that subsidiary;

               (2)  if subject to applicable securities legislation of the
                    Province of Alberta, an insurance company licensed under the
                    Insurance Act (Alberta) or a subsidiary of such insurance
                    company where such insurance company owns beneficially all
                    of the voting securities of the subsidiary;

               (3)  if subject to applicable securities legislation of the
                    Province of British Columbia, a savings institution or an
                    insurer or a subsidiary of such savings institution or
                    insurer where such savings institution or insurer owns
                    beneficially all of the voting securities of the subsidiary,
                    except the voting securities required by law to be owned by
                    directors of that subsidiary;

          (2)  recognized or designated as an exempt purchaser within the
               meaning of applicable securities legislation and, if subject to
               the securities legislation of one of the Provinces of Alberta,
               British Columbia or Ontario, is not an individual; or

          (3)  purchasing a sufficient number of Units such that the aggregate
               acquisition cost to the Subscriber of such Units is not less than
               $150,000 or, if subject to the securities legislation of the
               Provinces of Alberta or British Columbia, is not less than
               $97,000, and is not an individual or, if an individual, the
<PAGE>

                                      -7-

               Subscriber has complied with the requirements of applicable
               securities legislation;

     (2)  in the case of the purchase by the Subscriber of Units as agent for a
          disclosed principal, each beneficial purchaser of the Units for whom
          the Subscriber is acting is purchasing as principal for its own
          account and not for the benefit of any other person; the Subscriber is
          an agent with due and proper authority to execute this Subscription
          Agreement and all other documentation in connection with the purchase
          of the Units on behalf of the beneficial purchaser; and this
          Subscription Agreement has been duly authorized, executed and
          delivered by or on behalf of, and constitutes the legal, valid and
          binding agreement of, the disclosed principal; and the beneficial
          purchaser:

          (1)  is recognized or designated as an exempt purchaser within the
               meaning of applicable Canadian provincial securities legislation
               and, if subject to the securities legislation of one of the
               Provinces of Alberta, British Columbia or Ontario, is not an
               individual; or

          (2)  is purchasing a sufficient number of Units such that the
               aggregate acquisition cost to the beneficial purchaser of such
               Units is not less than $150,000 or, if subject to the securities
               legislation of the Provinces of Alberta or British Columbia, is
               not less than $97,000, and is not an individual or, if an
               individual, the beneficial purchaser has complied with the
               requirements of applicable securities legislation;

     (3)  in the case of the purchase by the Subscriber of Units as trustee or
          as agent for a principal which is undisclosed or identified by account
          number only, this Subscription Agreement has been duly authorized,
          executed and delivered by, and constitutes a legal, valid and binding
          agreement of, the Subscriber acting in such capacity, and either:

          (1)

               (1)  if subject to applicable securities legislation of the
                    Province of Alberta,

                    the Subscriber is:

                    (1)  a trust corporation as defined in such securities
                         legislation, and any amendments thereto, trading as a
                         trustee or an agent; or

                    (2)  a portfolio manager or a person or a company trading as
                         an agent that is exempt from registration as a
                         portfolio manager under applicable securities
                         legislation,

                    for accounts that are fully managed by the Subscriber,
<PAGE>

                                      -8-

               (2)  if subject to applicable securities legislation of the
                    Province of British Columbia, the Subscriber is:

                    (1)  a trust company registered or an insurer licensed
                         purchasing or selling as an agent or trustee; or

                    (2)  a registered portfolio manager or a portfolio manager
                         exempt from such registration purchasing or selling as
                         an agent, for accounts that are fully managed by the
                         Subscriber; or

               (3)  if subject to the applicable securities legislation of the
                    Province of Ontario, the Subscriber is a trust company
                    registered under the Loan and Trust Corporations Act
                    (Ontario), an insurance company licensed under the Insurance
                    Act (Ontario) or a credit union to which the Credit Unions
                    and Caisses Populaires Act, 1994 (Ontario) applies, and is
                    purchasing the Units as trustee or as agent for accounts
                    that are fully managed by the Subscriber;

          (2)  the beneficial purchaser of the Units for whom the Subscriber is
               acting is an individual or corporation and is purchasing as
               principal for its own account, and not for the benefit of any
               other person, and

               (1)  is purchasing a sufficient number of Units such that the
                    beneficial purchaser's aggregate acquisition cost of such
                    Units is not less than $150,000 or, if subject to the
                    securities legislation of the provinces of Alberta or
                    British Columbia, is not less than $97,000; or

               (2)  is recognized or designated as an exempt purchaser within
                    the meaning of applicable securities legislation and, if
                    subject to the securities legislation of one of the
                    provinces of Alberta, British Columbia or Ontario, is not an
                    individual;

     (4)  if the Subscriber is not an individual or a corporation and does not
          fall within one of the categories specified in clauses (i) to (iii)
          inclusive of subparagraph (f) below, each member of the partnership,
          syndicate, trust or other unincorporated organization which is the
          beneficial purchaser, or each beneficiary of the trust which is the
          beneficial purchaser, as the case may be, is an individual who is
          purchasing Units having an aggregate acquisition cost to such
          individual of not less than $150,000 (if resident of Ontario) or
          $97,000 (if resident of Alberta or British Columbia),

     (5)  neither the Subscriber nor any party on whose behalf it is acting has
          been established, formed or incorporated solely to acquire or permit
          the purchase of the Units without a prospectus in reliance on an
          exemption from the prospectus requirements of
<PAGE>

                                      -9-

          applicable securities legislation; or if established for such purpose
          the share or portion of any member or partner of the partnership,
          syndicate or unincorporated organization, any beneficiary of the trust
          or any shareholder of the company of the aggregate acquisition cost to
          the Subscriber of the securities being purchased is less than $150,000
          (if resident in Ontario) or $97,000 (if resident in British Columbia
          or Alberta);

     (6)  the Subscriber is purchasing as principal and is not a corporation,
          partnership, trust, fund, association, or any other organized group of
          persons created, or used primarily, to permit the purchase of the
          Units (or other similar purchases) by a group of individuals whose
          individual share of the aggregate acquisition cost of the Units is
          less than the prescribed amount or, if not purchasing the Units as
          principal, it is duly authorized to enter into this subscription and
          to execute all documentation in connection with the purchase on behalf
          of each beneficial purchaser, it acknowledges that the Company may in
          the future be required by law to disclose on a confidential basis to
          securities regulatory authorities the identity of each beneficial
          purchaser of Units for whom it may be acting, and it is:

          (1)  a trust company or insurance company that has been authorized to
               carry on business under the laws of a province or territory of
               Canada;

          (2)  a portfolio manager registered or exempt from registration under
               the laws of a province or territory of Canada;

          (3)  a portfolio manager in a jurisdiction other than Canada, provided
               that the total asset value of the investment portfolio it manages
               on behalf of its clients is not less than $20,000,000, and that
               it provides the Company with certification of such in the
               required form; or

          and it is purchasing the Units as an agent or trustee for accounts
          that are fully managed by it; or

          (4)  if it is resident in Ontario it falls within one of the following
               categories: (1) pension plans; (2) groups of pension plans under
               common management; (3) organizations of members of a family fund
               formed to make investments of family funds; (4) testamentary
               trusts and estates; (5) organizations which have primary ongoing
               business activities other than investing in securities; (6)
               mutual funds other than private mutual funds within the meaning
               of Section 1(1) of the Securities Act (Ontario); (7) group
               registered retirement savings plans or group deferred profit
               sharing plans; or (8) partnerships, interests in which are
               offered by prospectus, where the partnership invests in
               securities in reliance upon Section 72(1)(d) of the Securities
               Act (Ontario) and Section 27 of the Regulation made thereunder.
<PAGE>

                                      -10-

     (7)  if the Subscriber is resident in Ontario, :

          (1)  the Subscriber is purchasing sufficient Units so that the
               aggregate acquisition cost of the Units to the Subscriber is not
               less than $150,000 and:

               (1)  the aggregate acquisition cost is to be immediately
                    satisfied by the payment of cash or other immediately
                    available funds: or

               (2)  the acquisition cost is satisfied in whole or in part by the
                    incurring or assumption of a liability by the purchaser, and

                    (1)  the Subscriber is primarily liable for the liability
                         and there is no understanding, arrangement or
                         expectation that the liability or the obligation to pay
                         it will be waived; and

                    (2)  the acquisition cost, including the liability that is
                         incurred or assumed by the Subscriber, has a fair value
                         of not less than $150,000;

          (2)  the Subscriber is not an investment club or, if it is an
               investment club, the share or portion of each member of the
               investment club of the aggregate acquisition cost to the
               investment club of the securities being purchased is at least
               $150,000;

          (3)  the Subscriber is:

               (1)  purchasing the Units as principal and no other person,
                    corporation, firm or other organization will have a
                    beneficial interest in the Units; or if not purchasing the
                    Units as principal, is duly authorized to enter into this
                    subscription agreement and to execute all documentation in
                    connection with the purchase on behalf of each beneficial
                    purchaser of Units, acknowledges that the Company may in the
                    future be required by law to disclose on a confidential
                    basis to securities regulatory authorities the identity of
                    each beneficial purchaser of Units for whom it may be
                    acting, and is acting as agent for one or more disclosed
                    beneficial purchasers, each of which is purchasing as a
                    principal for its own account, not for the benefit of any
                    other person, and not with a view to the resale or
                    distribution of all or any of the Units and the aggregate
                    acquisition cost of the Units to each such purchaser is not
                    less than Cdn.$150,000 to be immediately satisfied by cash
                    payment in full as required by OSC Rule 45-501 and, each
                    such purchaser is not a partnership, syndicate,
                    unincorporated organization, trust, company or, any other
                    organized group of persons or entity created or being used
                    primarily to permit the purchase of the Units (or other
                    similar
<PAGE>

                                      -11-

                    purchases) without a prospectus if the share or portion of
                    any member or partner of the partnership, syndicate or
                    unincorporated organization, any beneficiary of the trust or
                    any shareholder of the company of the aggregate Subscription
                    Price is less than $150,000 without a prospectus; or

               (2)  if not purchasing as principal, a trust corporation
                    registered under the Loan and Trust Corporations Act, and
                    the acquisition cost of Units to each beneficial purchaser
                    for whom it may be acting is less than $150,000 to be
                    immediately satisfied by cash payment in full is required by
                    OSC Rule 45-501; or

               (3)  if not purchasing as principal, a portfolio advisor within
                    the meaning of OSC Rule 45-504, and is purchasing the Units
                    on behalf of managed accounts, within the meaning of OSC
                    Rule 45-504; or

               (4)  if the exemption pursuant to Section 72(1)(a) of the
                    Securities Act (Ontario) is available to the Subscriber:

                    (1)  a bank listed in Schedule I or II to the Bank Act
                         (Canada), or the Business Development Bank of Canada
                         incorporated under the Business Development Bank of
                         Canada Act (Canada),

                    (2)  a credit union or league to which the Credit Unions and
                         Caisses Populaires Act, 1994 applies,

                    (3)  a loan corporation or trust corporation registered
                         under the Loan and Trust Corporations Act,

                    (4)  an insurance company licensed under the Insurance Act,

                    (5)  Her Majesty in right of Canada or any province or
                         territory of Canada, or

                    (6)  a subsidiary of any company referred to in subclause A,
                         B, C or D, where the company owns all of the voting
                         shares of the subsidiary,

                    (7)  a dealer registered in the category of broker,
                         investment dealer or securities dealer,

                    (8)  any municipal corporation or public board or commission
                         in Canada,
<PAGE>

                                      -12-

                         who purchases as principal;

          (8)  the Subscriber acknowledges that:

               (1)  as the Underlying Securities are subject to a hold period
                    under applicable Canadian Securities legislation, the
                    Company may be required to legend the certificates
                    representing the Underlying Securities in substantially the
                    following form:

                    "THE SECURITIES REPRESENTED HEREBY WERE ISSUED PURSUANT TO
                    AVAILABLE EXEMPTIONS FROM REGISTRATION AND PROSPECTUS
                    REQUIREMENTS UNDER APPLICABLE SECURITIES LEGISLATION. ALL OF
                    THE SECURITIES MAY BE OFFERED FOR SALE OR SOLD, PLEDGED,
                    TRANSFERRED OR OTHERWISE DISPOSED OF IN ONTARIO ONLY ON OR
                    AFTER EXPIRY OF THE APPLICABLE HOLD PERIOD AND PROVIDED AT
                    THE TIME OF SUCH OFFER, SALE, PLEDGE, TRANSFER OR OTHER
                    DISPOSITION, THE COMPANY HAS BEEN A REPORTING ISSUER IN
                    ONTARIO FOR AT LEAST 12 MONTHS AND NO UNUSUAL EFFORT IS MADE
                    TO PREPARE THE MARKET OR TO CREATE A DEMAND FOR THE
                    SECURITIES AND NO EXTRAORDINARY COMMISSION OR CONSIDERATION
                    IS PAID IN RESPECT THEREOF. THE SECURITIES MAY BE SO
                    OFFERED, SOLD, PLEDGED, TRANSFERRED OR OTHERWISE DISPOSED OF
                    IN ONTARIO PRIOR TO THAT DATE IF AN EXEMPTION IS OTHERWISE
                    AVAILABLE FROM THESE REQUIREMENTS OR IF QUALIFIED BY
                    PROSPECTUS.", and

               (2)  as the Underlying Securities have not been and will not be
                    registered under the United States Securities Act of 1933,
                    as amended (the "U.S. Securities Act"), the Company may be
                    required to legend the certificates representing the
                    Underlying Securities;

          (9)  the Subscriber and each beneficial purchaser for whom it is
               acting are resident in the province set out in their address in
               this Subscription Agreement; or (ii) the Subscriber is not a
               citizen or resident of Canada, or a corporation, partnership, or
               other entity created in or organized under the laws of Canada or
               any province or territory thereof (collectively a "Canadian
               Person") and such Subscriber is not purchasing the Units or the
               Underlying Securities for the account of any Canadian Person;

          (10) the Subscriber, whether acting as principal, trustee or agent, is
               neither a "U.S. Person" (as such term is defined in Regulations S
               under the U.S. Securities Act,

<PAGE>

                                      -13-

               which definition includes but is not limited to, a natural person
               resident in United States, an estate or trust of which any
               executor or administrator or trustee, respectively, is a U.S.
               Person and any partnership or corporation organized or
               incorporated under the laws of the United States) nor purchasing
               the Units, directly or indirectly, for the account or benefit of
               a U.S. Person or a person in the United States for resale in the
               United States, and the Subscriber does not have any agreement or
               understanding (either written or oral) with any U.S. Person or a
               person in the United States respecting:

               (1)  the transfer or assignment of any rights or interest in any
                    of the Units; or

               (2)  the division of profits, losses, fees, commissions, or any
                    financial stake in connection with this subscription;

          (11) if the Subscriber is a resident of a jurisdiction other than
               Canada, the purchase of the Units by such Subscriber does not
               contravene any of the applicable securities legislation in the
               jurisdiction in which it is resident and does not trigger (i) any
               obligation to prepare and file a prospectus or similar document,
               or any other report with respect to such purchase, and (ii) any
               registration or other obligation on the part of the Company;

          (12) the Underlying Securities are subject to resale restrictions
               under applicable Canadian provincial securities legislation and
               rules of regulatory bodies having jurisdiction, and the
               Subscriber (or the others for whom it is contracting hereunder)
               covenants to comply with all relevant securities legislation
               concerning any resale of the Underlying Securities, and shall
               consult with its own legal advisors with respect to such
               compliance;

          (13) no offer of Units was made to the Subscriber (or the others for
               whom it is contracting hereunder) in the "United States" (as
               defined in Regulation S under the U.S. Securities Act) and the
               Subscriber did not execute this Subscription Agreement in the
               United States;

          (14) the activities of the Subscriber (or the others for whom it is
               contracting hereunder) contemplated hereunder are not a scheme to
               avoid the registration requirements of the U.S. Securities Act;

          (15) the Subscriber (or the others for whom it is contracting
               hereunder) has no intention to distribute, and shall not
               transfer, either directly or indirectly, any of the Underlying
               Securities to any person within the United States or to "U.S.
               Persons" (as defined in Regulation S under the U.S. Securities
               Act);
<PAGE>

                                      -14-

          (16) if the Subscriber is an individual, he or she has attained the
               age of majority and in every case he or she is legally competent
               to execute this Subscription Agreement and to take all actions
               required pursuant hereto;

          (17) if the Subscriber is other than an individual, it is legally
               formed and validly exists and is competent to execute the
               Subscription Agreement and to take all actions required pursuant
               thereto and all approvals necessary for the Subscriber to execute
               and deliver this Subscription Agreement have been obtained;

          (18) if the Subscriber is required by applicable securities
               legislation, policy or order or by the Company, it will execute,
               deliver and file, or assist the Company in filing, or provide to
               the Company such reports, undertakings and other documents with
               respect to the issue of the Units or the Underlying Securities
               issued pursuant to the exercise thereof as may be required by any
               securities commission, or other regulatory authority;

          (19) upon acceptance by the Company, this Subscription Agreement will
               constitute a legal, valid and binding contract of the Subscriber
               enforceable against the Subscriber in accordance with its terms
               and will not violate or conflict with the terms of any
               restriction, agreement or undertaking respecting purchases of
               securities by the Subscriber;

          (20) it is responsible for obtaining such legal advice as it considers
               necessary in connection with the execution, delivery and
               performance by it of this Subscription Agreement and the
               transactions contemplated hereunder, and it should consult its
               own legal advisors with respect to applicable resale restrictions
               and it is solely responsible (and that the Company is not in any
               manner responsible) for complying with such restrictions. If it
               is not resident in Canada, it represents and warrants that such
               execution, delivery and performance shall not contravene any
               applicable laws of the jurisdiction in which it is resident;

          (21) it is hereby acknowledged that no prospectus has been filed by
               the Company with the Ontario Securities Commission, or a
               securities commission in any other jurisdiction, in connection
               with the issuance of the Units and the issuance is exempted from
               the prospectus requirements available under the provisions of the
               applicable securities legislation and application securities
               regulations (the "Securities Legislation") and as a result:

               (1)  the Subscriber is restricted from using most of the civil
                    remedies available under the Securities Legislation in
                    respect of its purchase of the Units;

               (2)  the Subscriber has not received information that would be
                    required to be contained in a prospectus prepared in
                    accordance with the Securities Legislation; and
<PAGE>

                                      -15-

               (3)  the Company is relieved from certain obligations that would
                    otherwise apply under the Securities Legislation;

          (22) the legal counsel retained by the Company (the "Company's
               Counsel") are acting as counsel to the Company, and not as
               counsel to the Subscriber. The relationship of the Company's
               Counsel with the Subscriber is limited solely to the provision of
               customary commercial legal opinions at the Closing Time and to
               responding to any questions which the Subscriber may have
               regarding the terms of the documents to be delivered in
               connection with this Unit offering transaction;

          (23) the Subscriber has such knowledge in financial and business
               affairs as to be capable of evaluating the merits and risks of
               its investment and it, or, where it is not purchasing as
               principal, each beneficial purchaser, is able to bear the
               economic risk of loss of its investment; and

          (24) the Subscriber (or the others for whom it is contracting
               hereunder) will execute and deliver within the applicable time
               periods all documentation as may be required by applicable
               Canadian securities legislation and regulations to permit the
               purchase of the Units on the terms herein set forth;

7.        Reliance Upon Representations, Warranties and Covenants
          -------------------------------------------------------

          The Subscriber acknowledges that the representations and warranties
and covenants contained in this Subscription Agreement are made with the intent
that they may be relied upon by the Company (and its counsel) in determining its
suitability to purchase the Units and the Subscriber hereby agrees to indemnify
the Company against all losses, claims, costs, expenses and damages or
liabilities which they may suffer or incur caused or arising from their reliance
thereon. The Subscriber further agrees that by accepting the Units the
Subscriber shall be representing and warranting that the foregoing
representations and warranties are true as at the Closing Time with the same
force and effect as if they had been made by the Subscriber at the Closing Time
and that they shall survive the purchase by the Subscriber of the Units.
Furthermore, the Subscriber undertakes to notify the Company immediately of any
change in any representation, warranty or other information relating to the
Subscriber set forth herein which takes place prior to the Closing Time.
<PAGE>

                                      -16-

8.   Acknowledgement and Waiver
     --------------------------

     The Subscriber, on its own behalf and on behalf of others for whom the
Subscriber is contracting hereunder, has acknowledged that it has not received
or requested any Offering Memorandum or sales or advertising literature
describing the business and affairs of the Company, and that the decision to
purchase the Units was not made on the basis of information provided to it in an
Offering Memorandum, or sales or advertising literature describing the business
and affairs of the Company.  Accordingly, the Subscriber, and the others for
whom the Subscriber is contracting hereunder, hereby waive, to the fullest
extent permitted by law, any rights of withdrawal, rescission or compensation
for damages to which it might otherwise be entitled.

     The Subscriber, on its own behalf and on behalf of others for whom the
Subscriber is contracting hereunder, is aware and has been advised that any
investment in the Company is speculative and involves a high degree of risk,
that substantial financing for the Company will be required in the future, and
that there is no assurance that such additional financing can be obtained.

THE SUBSCRIBER HAS RECEIVED SUCH INDEPENDENT ADVICE FROM INDEPENDENT LEGAL,
ACCOUNTING AND TAX PROFESSIONAL ADVISORS AS THE SUBSCRIBER HAS DETERMINED
NECESSARY TO MAKE A DECISION TO PURCHASE THE UNITS.

9.   Costs
     -----

     The Subscriber acknowledges and agrees that all costs and expenses incurred
by the Subscriber (including any fees and disbursements of any special counsel
retained by the Subscriber) relating to the purchase of the Units shall be borne
by the Subscriber, other than any private placement fees, agency fees or
commission which shall be borne by the Company as set out above.

10.  Governing Law
     ------------

     This Subscription Agreement is governed by the laws of the Province of
Ontario and the federal laws of Canada applicable therein.  The Subscriber, in
his or her personal or corporate capacity and, if applicable, on behalf of each
beneficial purchaser for whom he is acting, irrevocably attorns to the
jurisdiction of the courts of the Province of Ontario.

11.  Survival
     -------

     This Subscription Agreement, including without limitation the
representations, warranties and covenants contained herein, shall survive and
continue in full force and effect and be binding upon the Subscriber
notwithstanding the completion of the purchase of the Units by the Subscriber
pursuant hereto, the completion of the issue of the Units and the Underlying
Securities, and any subsequent disposition by the Subscriber of the Units or any
of the Underlying Securities.

12.  Assignment
     ----------
<PAGE>

                                      -17-

     This Subscription Agreement is not transferable or assignable.  The
benefits under this Subscription Agreement are transferrable and assignable by
the parties hereto, subject to the applicable law.

13.  Reliance on Facsimiles
     ----------------------

     The Company shall be entitled to rely on delivery of a facsimile copy of
this executed Subscription Agreement, and acceptance by the Company of such
facsimile shall be legally effective to create a valid and binding agreement
between the undersigned and the Company in accordance with the terms hereof.

14.  Entire Agreement
     ----------------

     This Subscription Agreement contains the entire agreement of the parties
hereby relating to the subject matter hereof and there are no representations,
warranties, covenants or other agreements relating to the subject matter hereof
except as stated or referred to herein.

15.  French Language
     ---------------

     The undersigned parties hereby request that this Subscription Agreement and
any related documents be drafted only in the English language.  Les parties
soussignees demandent par les presentes que le present contrat d'achat ainsi que
tous les documents y afferents soient rediges en langue anglaise seulement.

16.  Time is of the Essence
     ----------------------

     For the purposes of this Subscription Agreement, time is of the essence.

17.  Counterparts
     ------------

     This Agreement may be executed in as many counterparts as may be necessary
and by facsimile, each of such counterparts so executed will be deemed to be an
original and such counterparts together will constitute one and the same
instrument and notwithstanding the date of execution will be deemed to bear the
date as of the day and year first above written.
<PAGE>

                                  APPENDIX A


                                  TERM SHEET
                                  ----------

                              OPUS MINERALS INC.

                          Private Placement of Units


Issuer:                  Opus Minerals Inc. (the "Company").

Offering:                Up to 680,000 Units at a price of US $2.25 per Unit.
                         Each Unit consists of one common share of the Company
                         and one common share purchase warrant of the Company,
                         exercisable at an exercise price of US $3.00 for two
                         years from the date of closing.

Amount:                  US $1,530,000 Maximum

Price:                   US $2.25 per Unit

Issue Type:              Private Placement in Ontario, [**] and in such other
                         jurisdictions as may be agreed by the Company.

Minimum Subscription:    $150,000 for subscribers resident in or subject to the
                         laws of Ontario and [**].

Use of Proceeds:         The net proceeds of the Offering, after deducting the
                         expenses of the Offering is intended to be used as
                         follows:

                         (I)   $**** for the **;

                         (II)  $**  for the completion of **;

                         (III) $** for the purchase of ***; and

                         (IV)  $** for working capital.

Resale Restrictions:     The Units are being offered in reliance upon available
                         exemptions to the prospectus requirements under
                         applicable Ontario securities laws. The Shares and
                         Purchase Warrants purchased hereunder, and Common
                         Shares acquired upon exercise of the Purchase Warrants
                         may not be resold
<PAGE>

                         following the closing of the offering, except in
                         reliance upon available exemptions to the prospectus
                         requirements or pursuant to a prospectus.

Closing:                 Closing is scheduled to occur on or about July *, 2000.
                         Subject to the agreement of the Company, this Offering
                         may close in one or more subsequent tranches after that
                         initial Closing Date.