Exhibit 10.2

                             DATED DECEMBER 3, 1998




                            (1) TOUCAN MINING LIMITED

                                     - and -

                        (2) TOUCAN GOLD CORPORATION INC.

                                     - and -

                               (3) ANAGRAM LIMITED

                                     - and -

                                 (4) MINMET PLC



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

                             SUPPLEMENTAL AGREEMENT
                        --------------------------------








                            MATHESON ORMSBY PRENTICE
                                   SOLICITORS
                               POUNTNEY HILL HOUSE
                            6 LAURENCE POUNTNEY HILL
                                     LONDON
                                    EC4R 0BL

                               TEL: 0171 404 0998
                               FAX: 0171 583 5644


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         THIS AGREEMENT is made the 3rd day of December, 1998.

                                     BETWEEN

(1)      TOUCAN MINING LIMITED, a private limited company incorporated under the
         laws of the Isle of Man and whose registered office is at Celtic House,
         Victoria Street, Douglas, Isle of Man ("the Optionor"); and

(2)      TOUCAN GOLD  CORPORATION  INC., a public limited  company  incorporated
         under the laws of the State of Delaware and whose  Principal  Executive
         Offices are situate at 8201  Preston  Road,  Suite 600,  Dallas,  Texas
         75225, USA ('the Parent"); and

(3)      ANAGRAM LIMITED, a private limited company  incorporated under the laws
         of the Isle of Man and whose  registered  office  is at  Celtic  House,
         Victoria Street, Douglas, Isle of Man ("the Optionee"); and

(4)      MINMET PLC, a public  limited  company  incorporated  under the laws of
         Ireland and whose registered office is at 10 Fitzwilliam Square, Dublin
         2 ("Minmet")

                                     WHEREAS

         (A) An Option Agreement was executed  between the Optionor,  the Parent
and the Optionee on the day of December 1998 (the "Option  Agreement")  relating
to the grant of an option to the  Optionee to purchase  the entire  issued share
capital of Mineradora de Bauxita Ltda and to acquire the Inter-Company  Debt (as
defined in the Option Agreement).

         (B) Minmet has agreed to purchase the entire  issued  share  capital of
the Optionee  subject to the parties  thereto  entering  into this  Supplemental
Agreement so that the Option Agreement is amended in the manner set out herein.

         (C) The parties hereby  further agree that,  save as set out hereunder,
the terms of the  Option  Agreement  shall  continue  to apply as set out in the
Option  Agreement and that the terms defined therein shall have the same meaning
whenever used herein.

         NOW IT IS HEREBY AGREED as follows:

         1. The terms of the Share Purchase Agreement between the Optionor,  the
Parent and the Optionee which is annexed to the Option  Agreement in Schedule II
are amended so that:

                  (a) Clause 3 thereof is deleted  and the  following  clause is
inserted as Clause 3:

                           "3.1 The  consideration  for the  sale  and  purchase
                  hereunder  of the Shares  (the  "Consideration")  shall be the
                  allotment  to the Vendor of  25,000,000  ordinary  shares (the
                  "Consideration  Shares")  in  Minmet  plc  of  10  Fitzwilliam
                  Square, Dublin 2 ("Minmet").



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                           3.2 The Vendor  covenants and undertakes  with Minmet
                  that it will hold and will not transfer or  otherwise  dispose
                  of any Consideration Shares referred to at 3.1 above otherwise
                  than in accordance with this Clause 3, namely:  (i) the Vendor
                  may sell up to 3,000,000  Consideration  Shares in each of the
                  three 6 month periods after the date hereof,  and it is hereby
                  agreed  that  any  Consideration  Shares  not  disposed  of in
                  earlier  periods  may be  added  to  those  saleable  in later
                  periods,   (ii)  in  addition  the  Vendor  will  be  free  to
                  distribute such number of Consideration  Shares as would equal
                  the  number of  shares  of the  Parent in issue at the time in
                  each of the second and third six month periods. The Vendor and
                  Minmet  further  agree  that the  Consideration  Shares not so
                  distributed  in a second  period of six months will be aded to
                  those  available for  distribution  in the third period of six
                  months.

                           3.3  Notwithstanding  the provision of Clause 3.2 the
                  Consideration Shares may be placed through Minmet's brokers in
                  agreement  with  Minmet  at any time  after  the date  hereof.
                  Minmet undertakes to act reasonably in respect of all requests
                  for sale of the Consideration Shares from the Vendor.

                           3.4 The Consideration  Shares allotted hereunder will
                  rank pari passu in all respects with those ordinary  shares of
                  Minmet in issue on the date  hereof,  and  Minmet  agrees  and
                  undertakes to make application and otherwise  procure that the
                  Consideration Shares allotted to the Vendor hereunder shall be
                  quoted  or  otherwise  dealt in on a pari  passu  basis as the
                  other ordinary shares in issue on the date hereof.

                           3.5

                                    3.5.1   In the event of:

                                            (a)   any subdivision, consolidation
                  or similar reorganisation of the Consideration Shares;

                                            (b)   any dividend or other distri-
                  bution by Minmet, subdivision,  consolidation, reorganisation,
                  repurchase or exchange  of the Consideration  Shares or  other
                  securities of Minmet or other similar  corporate   transaction
                  or  event occurring in  respect of or affecting the Considera-
                  tion  Shares such that an  adjustment is necessary in order to
                  preserve (as far as possible) the equivalent economic value of


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                  the rights of the Vendor  immediately  prior to  the  relevant
                  transaction  or event,  having  regard to any diluting or con-
                  centrating  effect of the relevant  transaction or event;

                  the auditors  for the time being of Minmet  shall  certify the
                  appropriate  adjustment  to all  or  any of the  Consideration
                  Shares  and  their  determination  shall  (save in the case of
                  manifest error) bind Minmet and the Vendor.

                                    3.5.2 Any adjustment made in accordance with
                  3.5.1 above  shall take  effect from the date of the  relevant
                  transaction or event, or, if earlier, the record date for that
                  transaction or event.  Notice of any adjustment  shall be sent
                  to the Vendor within 28 days together with a share certificate
                  in respect of any additional  Consideration Shares to which it
                  is thereby entitled.

                  (b) Schedule III thereof is deleted and the provisions set out
         in Schedule I hereto are inserted in its place as Schedule III.

         2. The terms of the  Assignment of Loan Note between the Parent and the
Optionee which is annexed to the Option  Agreement in Schedule IV are amended so
that Clause 1 thereof is deleted and the following Clause inserted as Clause 1:

                  "1 In consideration of the payment of US$250,000 by Minmet plc
         of 10 Fitzwilliam  Square,  Dublin 2, Ireland  ("Minmet") to the Vendor
         (the receipt of which is hereby  acknowledged)  and the grant by Minmet
         to the Vendor of 7,700,000  warrants in Minmet pursuant to the terms of
         the Warrant Instrument  attached hereto, the Vendor as beneficial owner
         assigns  to Minmet all that the Debt due and owing to the Vendor by the
         Debtor and all interest due and to become due for the same and the full
         benefit and advantage of the same to hold to Minmet absolutely."

         The  Warrant  Instrument  referred  to above will be in the form of the
Instrument  attached  hereto and  initialed  by the parties  for  identification
purposes.

         3.       Guarantee

                  3.1 Minmet  hereby  guarantees  to the Optionor and the Parent
that the Optionee  will duly observe and perform all of the  obligations  on its
part  contained in the Option  Agreement  together with any and all  obligations
arising upon the exercise of the Options  contained  therein and will pay to and
indemnify  the  Optionor  and the  Parent as the case may be in  respect  of all
losses damages  expenses and costs  resulting from the breach by the Optionee of
such obligations.

                  3.2 This  guarantee  shall not be  discharged  by  either  the
Optionor  or the  Parent  giving to the  Optionee  time or other  indulgence  in
respect of its obligations  under the Option Agreement and/or the Share Purchase
Agreement.


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         4.       Governing Law

         This  Agreement  shall be governed by and  construed in all respects in
accordance with the laws of England and Wales and the parties agree to submit to
the  non-exclusive  jurisdiction  of the English  Courts as regards any claim or
matter arising in relation to this Agreement.


         AS WITNESS the hands of the  authorised  representative  of the parties
hereto the day and year first before written.



TOUCAN MINING LIMITED


By:  /s/ R.P. Jeffcock
     --------------------------
     R.P. Jeffcock



TOUCAN GOLD CORPORATION


By:  /s/ R.P. Jeffcock
     --------------------------
     R.P. Jeffcock



ANAGRAM LIMITED


By:  /s/ David Walsh
     --------------------------
     David Walsh




MINIMET PLC


By:  /s/ Michael Nolan
     --------------------------
     Michael Nolan


By:  /s/ Gordon P. Riddler
     --------------------------
     Gordon P. Riddler
       
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                                   SCHEDULE I

            Completion Arrangements for the Share Purchase Agreement
                         and the Assignment of Loan Note


At Completion:

1.       Board Meetings

         The Vendor shall  procure  that a Board  Meeting of the Company is duly
         convened and held at which valid resolutions are passed:

         (a)      that  the  transfers  referred  to in  paragraph  2  below  be
                  approved,  and that the  Purchaser be forthwith  placed on the
                  register  of  members  of the  Company  as the  holder  of the
                  Shares;

         (b)      that there be appointed as directors and secretary of the
                  Company such persons as the Purchaser may nominate;

         (c)      that the  resignations of  the directors  and  secretaries and
                  auditors referred to in paragraph 2 below be accepted; and

2.       A Board  Meeting of the  Purchaser  is duly  convened and held at which
         valid resolutions are passed:

         (a)      approving  the purchase of the Shares and the entering into of
                  this  Agreement and any other  documents to be entered into by
                  the  Purchaser  and  authorising  such persons  signing on the
                  Purchaser's behalf to do so;

         (b)      that the allotments to the Vendor of the  Consideraton  Shares
                  be approved  subject to the  restrictions on sale contained in
                  Clause 3.2.

3.       Delivery by the Vendor

         The Vendor shall deliver to the Purchaser's Solicitors:

         (a)      copies certified as correct by the Secretary of the Company of
                  the  resolutions  passed at the Board Meetings  referred to in
                  paragraph 1 above;

         (b)      duly  executed  transfers  of  the  Shares  in  favour  of the
                  Purchaser or  its nominees  together with  the relevant  share
                  certificates;

         (c)      any powers of  attorney or other  authorities  under which any
                  transfers  have been executed  which shall be duly stamped and
                  executed;


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         (d)      the statutory books,  certificate(s) of  incorporation  and of
                  incorporation on change  of name, up to date as at Completion,
                  and the Common Seal of the Company;

4.       Delivery by the Purchaser

         The Purchaser shall deliver to the Vendor's solicitors:

         (a)      Share Certificates in respect of the Consideration Shares; and

         (b)      certified copies of all board resolutions in relation to the
                  issue of the Consideration Shares to the Vendor; and

         (c)      a bank draft for US$250,000; and

         (d)      warrant  certificates in respect of 7,700,000  ordinary shares
                  in Minmet issued pursuant to the Warrant Instrument.

5.       Release of Sureties, etc.

         The  Vendor  shall  procure  that  the  Company  be  released  from any
         guarantee, surety, indemnity,  mortgage, charge or other security given
         by it in respect of all or any of the  obligations of the Vendor or any
         shareholder, director, officer or employee of the Vendor.


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                                   SCHEDULE II

                              The Option Agreement


                          (Omitted. See Exhibit 10.3)




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