EXHIBIT 4.57


                      OPTION AGREEMENT - MASKOOTCH PROPERTY

THIS AGREEMENT is made for reference June 23, 2004,

BETWEEN:

         1304850 ONTARIO INC.
         PERRY ENGLISH
         Box 414
         Souris, Manitoba
         ROK2CO

         (the "Optionor")

AND:

         AMADOR GOLD CORP.
         16493 - 26th Avenue
         Surrey, British Columbia
         V3S 9W9

         (the "Optionee")

WHEREAS:

A.       The Optionor is the registered  and  beneficial  owner of mining claims
located in  Maskootch  Lake in the Red Lake Mining  Division  of  Ontario,  more
particularly described in Schedule "A" to this Agreement (the "Property"); and

B.       The Optionor has agreed to grant an option to the Optionee to acquire a
100% an interest in the Property on the terms described herein.

THEREFORE  in  consideration  of the mutual  covenants  and  agreements  in this
Agreement, the parties agree as follows:

1.       DEFINITIONS AND INTERPRETATION

1.1      For the purposes of this Agreement:

(a)      "Affiliate" means any person, partnership,  joint venture,  corporation
         or other form of enterprise which directly or indirectly  controls,  is
         controlled  by,  or is  under  common  control  with,  a party  to this
         Agreement.  For purposes of the  preceding  sentence,  "control"  means
         possession,  directly  or  indirectly,  of the power to direct or cause
         direction  of  management  and  policies  through  ownership  of voting
         securities, contract, voting trust or otherwise;

(b)      "Net Smelter Returns" has the meaning prescribed in Schedule "B";

(c)      "NS  Royalty"  means the royalty in favour of the Optionor to which the
         Property  is  subject,  which is an amount  equal to 2% of Net  Smelter
         Returns;





(d)      "Option"  means an  exclusive  option  granted to the  Optionee  by the
         Optionor  to  acquire  up to an  undivided  100%  legal and  beneficial
         interest  in  and  to  the  Property   (subject  to  the  NS  Royalty),
         exercisable in the manner described at section 3;

(e)      "Option  Period"  means  the  period  commencing  on the  date  of this
         Agreement and ending one day after the day on which the last Payment at
         paragraph 3.2 is required to be made;

(f)      "Payment"  means a payment in cash or certified  cheque by the Optionee
         to the Optionor;

(g)      "Property" has the meaning ascribed in recital "A" of this Agreement;

(h)      "Property   Rights"   means   all   licences,    permits,    easements,
         rights-of-way,  certificates and other approvals  obtained by either of
         the parties,  either  before or after the date of this  Agreement,  and
         necessary  for the  development  of the  Property or for the purpose of
         placing the Property into production or of continuing production on the
         Property; and

(i)      "Shares"  means  fully  paid and  non-assessable  common  shares in the
         capital  of  the  Optionee,   issued   pursuant  to   exemptions   from
         registration and prospectus  requirements contained in sections 45(2)(2
         1) and 74(2)(18) of the SECURITIES ACT (British Columbia).

1.2      For the  purposes  of this  Agreement,  except as  otherwise  expressly
provided or unless the context otherwise requires:

(a)      "this  Agreement"  means this mining option agreement and all Schedules
         attached hereto;

(b)      any reference in this Agreement to a designated "Section",  "Schedule",
         "paragraph"  or other  subdivision  refers to the  designated  section,
         schedule, paragraph or other subdivision of this Agreement;

(c)      the words  "herein" and  "hereunder"  and other words of similar import
         refer to this Agreement as a whole and not to any particular Section or
         other subdivision of this Agreement;

(d)      the word  "including",  when following any general  statement,  term or
         matter, is not to be construed to limit such general statement, term or
         matter to the specific items or matters set forth immediately following
         such word or to similar items or matters,  whether or not  non-limiting
         language (such as "without limitation" or "but not limited to" or words
         of similar import) is used with reference  thereto but rather refers to
         all other  items or  matters  that  could  reasonably  fall  within the
         broadest possible scope of such general statement, term or matter;

(e)      any reference to a statute  includes and,  unless  otherwise  specified
         herein,  is a reference  to such  statute and to the  regulations  made
         pursuant  thereto,  with all amendments  made thereto and in force from
         time to time,  and to any  statute  or  regulations  that may be passed
         which has the effect of  supplementing  or superseding  such statute or
         such regulation;

(f)      any reference to "party" or "parties" means the Optionor, the Optionee,
         or both, as the context requires;

(g)      the headings in this  Agreement are for  convenience  of reference only
         and do not affect the interpretation of this Agreement;


                                       2



(h)      words  importing  the masculine  gender  include the feminine or neuter
         gender and words in the  singular  include the plural,  and vice versa;
         and

(i)      all references to currency refer to Canadian dollars.

1.3      The following are the Schedules to this Agreement, and are incorporated
into this Agreement by reference:

         Schedule "A":              The Property
         Schedule "B":              NS Royalty

Wherever any term or  condition,  expressed or implied,  in any of the Schedules
conflicts or is at variance with any term or conditions of this  Agreement,  the
terms or conditions of this Agreement will prevail.

2.       REPRESENTATIONS AND WARRANTIES OF THE OPTIONOR AND THE OPTIONEE

2.1      The Optionor represents and warrants to the Optionee that:

(a)      the Optionor is the  beneficial  owner of the Property and the Optionor
         has the full  right,  power,  capacity  and  authority  to enter  into,
         execute and deliver this Agreement;

(b)      the  Property is held by the Optionor is free and clear of and from all
         liens, charges and encumbrances;

(c)      the Optionor  holds all  permits,  licences,  consents and  authorities
         issued by any government or governmental  authority which are necessary
         in connection  with the ownership and operation of its business and the
         ownership of the Property;

(d)      to the best of the Optionor's knowledge, the Property has been properly
         staked,  located  and  recorded  pursuant  to the  applicable  laws and
         regulations  of Ontario and all mining claims  comprising  the Property
         are in good standing;

(e)      there is no adverse  claim or challenge  against or to the ownership of
         or title to any part of the Property  and, to the best of the knowledge
         of the Optionor  there is no basis for such adverse  claim or challenge
         except for a general claim by aboriginal peoples in British Columbia to
         the ownership of British Columbia which may affect the Property;

2.2      The  representations  and  warranties  contained in  paragraph  2.1 are
provided for the exclusive  benefit of the Optionee,  and a breach of any one or
more  representations or warranties may be waived by the Optionee in whole or in
part at any time without  prejudice to its rights in respect of any other breach
of the same or any other representation or warranty, and the representations and
warranties contained in paragraph 2.1 will survive the execution and delivery of
this Agreement.

2.3      The Optionee represents and warrants to the Optionor that:

(a)      the Optionee is a valid and subsisting  corporation  duly  incorporated
         and in good standing under the laws of the  jurisdiction in which it is
         incorporated, continued or amalgamated;

(b)      the Optionee has the full right, power, capacity and authority to enter
         into, execute and deliver this Agreement and to be bound by its terms;


                                       3



(c)      the consummation of this Agreement will not conflict with nor result in
         any breach of its constituting documents or any covenants or agreements
         contained  in or  constitute  a default  under any  agreement  or other
         instrument  whatever  to which the  Optionee is a party or by which the
         Optionee is bound or to which the Optionee may be subject; and

(d)      no  proceedings  are pending  for,  and the  Optionee is unaware of any
         basis for, the institution of any proceedings leading to the placing of
         the Optionee in bankruptcy  or subject to any other laws  governing the
         affairs of insolvent parties.

(e)      The  representations  and  warranties  contained in  paragraph  2.3 are
         provided for the exclusive benefit of the Optionor, and a breach of any
         one or more representations or warranties may be waived by the Optionor
         in whole or in part at any time  without  prejudice  to its  rights  in
         respect of any other breach of the same or any other  representation or
         warranty; and the representations and warranties contained in paragraph
         2.3 of will survive the execution and delivery of this Agreement.

3.       OPTION

3.1      The Optionor  hereby grants the Option to the Optionee  which Option is
exercisable by the Optionee:

(a)      issuing to the Optionor 100,000 Shares as follows:

         (i)      25,000 Shares upon execution of this Agreement;
         (ii)     25,000 Shares by June 23, 2005;
         (iii)    25,000 Shares by June 23, 2006; and
         (iv)     25,000 Shares by June 23, '2007.

(b)      making the following Payments to the Optionor:

         (i)      $5,000 upon execution of this Agreement;
         (ii)     $8,000 on or before June 23, 2005;
         (iii)    $15,000 on or before June 23, 2006;
         (iv)     $20,000 on or before June 23, 2007;
         (v)      $40,000 on or before June 23, 2008.

3.2      The  Optionor  and  the  Optionee   acknowledge  and  agree  that  upon
completion  of all of the  Payments  and  Share  issuances  set out  above,  the
Optionee shall have earned a 100% interest in the Property. Each of the Payments
and  issuances  of Shares are  required to be made in order for the Option to be
exercised,  and the  Optionee  will not be  entitled  to any refund of  Payments
previously  made or  Shares  previously  issued  if it  fails or  elects  not to
exercise the Option in full.

3.3      The  Optionee  has  the  right  to  accelerate  the  schedule  of  work
Expenditures, Payments and Share issuances outlined above and by so doing reduce
the time for earning its 50% interest.

3.4      Except as specifically  provided  elsewhere  herein,  this is an option
agreement only and until the exercise of the Option,  nothing  herein  contained
and no act done nor payment or share issuance made hereunder  shall obligate the
Optionee to do any further act or acts or to make any further payments or shares
issuances  (other than the  requirements  specified in paragraph 3.1), and in no
event shall this Agreement or any act done or any payment or share issuance made
be construed as an  obligation of the Optionee to do or perform any work or make
any payments or share issuances on or with respect to the Property.


                                       4



4.       PROPERTY EXPLORATION AND MAINTENANCE

4.1      The Optionor agrees that it will submit such reports of its exploration
activities on the Property to the appropriate  government  authorities as may be
required to maintain the Property in good standing during the Option Period, and
will, if requested by the Optionee,  further provide copies of such  information
to the Optionee.

5.       ROYALTIES ENCUMBERING PROPERTY

5.1      The Optionee  acknowledges  and agrees that to the extent  described in
Schedule  "B",  the  Property  is  subject  to the NS  Royalty  in favour of the
Optionor.  The Optionor has given the Optionee the right to purchase one percent
(1%) of the NS Royalty for ONE MILLION DOLLARS ($1,000.000).

6.       RIGHT OF ENTRY

Throughout  the Option  Period,  the Optionor will have the  exclusive  right in
respect of the Property to:

(a)      enter the Property; and

(b)      bring and erect upon the Property such buildings,  plant, machinery and
         equipment as the  Optionee may deem  necessary or desirable in its sole
         discretion.

7.       RECORDING OF AGREEMENT

7.1      The Optionor and the Optionee will execute and deliver such  additional
documentation  as legal  counsel for the Optionor and the Optionee  determine is
necessary in order to duly register and record in the  appropriate  registration
and recording offices notice that the Optionor's interest in and to the Property
is subject to and bound by the terms of this Agreement.

8.       CONDITIONS PRECEDENT

8.1      The  obligation  of  the  Optionee  to  consummate   the   transactions
contemplated  under this Agreement is subject to the following  conditions which
are to the Optionee's sole benefit and may be waived in writing by the Optionee:

(a)      the  Optionee  and  the  Optionor  will  have  received  the  requisite
         regulatory   approvals  to  the   transactions   contemplated  in  this
         Agreement; and

(b)      the Optionee  will be satisfied as to the title to the Property held by
         the Optionor.

8.2      The  Optionee  and the  Optionor  will use their best efforts to assist
each other in obtaining the requisite regulatory approvals to this Agreement.

8.3      This Agreement will terminate if the conditions  described in paragraph
8.1 are not satisfied on or before 45 days from the date of this Agreement.


9.       OBLIGATIONS DURING OPTION PERIOD

9.1      During the Option  Period,  unless  this  Agreement  is  terminated  in
accordance  with  paragraph  14, the  Optionor  covenants  and  agrees  with the
Optionee that the Optionor will:


                                       5



(a)      maintain  the  Property  in good  standing  by  doing  and  filing  all
         assessment  work or making  payments in lieu thereof and by  performing
         all other acts which may be  necessary in order to keep the Property in
         good standing and free and clear of all liens and other charges arising
         from or out of the Optionor's activities on the Property;

(b)      do all work on the  Property  in a good and  workmanlike  manner and in
         accordance  with  sound  mining  and   engineering   practices  and  in
         compliance with all applicable laws, bylaws,  regulations,  orders, and
         lawful  requirements of any  governmental  or regulatory  authority and
         comply  with  all  laws  governing  the  possession  of  the  Property,
         including,  without limitation,  those governing safety,  pollution and
         environmental matters;

(c)      deliver to the Optionee  (immediately after receipt by the Optionor all
         engineering  and  geological  reports  and assay  results in respect of
         samples  taken from the Property  (together  with  reports  showing the
         location from which the samples were taken and the type of samples) and
         report  to the  Optionee  on a  monthly  basis in  respect  of all data
         relevant to the Property,  including, without limitation,  opinions and
         field  results,  provided that the Optionee will indemnify and save the
         Optionor  harmless  with  respect  to any use made by the  Optionee  of
         interpretive data prepared by and received from the Optionor;

(d)      permit  the  Optionee,  at his own  risk  and  expense,  access  to the
         Property at all  reasonable  times and to all  records  prepared by the
         Optionor in connection with the Expenditures; and

10.      RIGHTS AND OBLIGATIONS AFTER TERMINATION OF OPTION

10.1     If this  Agreement  and  the  Option  will  terminate  pursuant  to the
provisions of paragraph 14, then:

(a)      the  Optionee  will  deliver a deed of quit claim or other  appropriate
         instrument to the Optionor in recordable form whereby the Optionee will
         acknowledge and agree that it has no interest either legal or equitable
         in and to the Property; and

(b)      the Optionee  will deliver,  at no cost to the Optionor,  within thirty
         (30) days after the date of such  termination,  copies of all  reports,
         maps,  assay  results  and other  relevant  technical  data  (including
         interpretative  data)  compiled  by or in the  possession  or under the
         control of the  Optionee  with  respect to the  Property  and all core,
         pulps,  samples and other  materials  relevant  to the  Property in the
         possession or under the control of the Optionee.

11.      NO ENCUMBRANCES AGAINST PROPERTY

11.1     During the Option Period, neither the Optionee nor the Optionor will be
entitled to grant any  mortgage,  charge or lien of or upon the  Property or any
portion thereof without the prior written consent of the other party.

12.      FORCE MAJEURE

12.1     If either  party is at any time during the Option  Period  prevented or
delayed in complying with any of the provisions of this Agreement (the "Affected
Party") by reason of strikes, lockouts, labour, power or fuel, shortages, fires,
wars,  acts of God, civil  disturbances,  governmental  regulations  restricting
normal  operations,  shipping  delays or any other reason or reasons  beyond the
reasonable control of the Affected Party (provided that lack of sufficient funds
to carry out  exploration  on the  Property  will be deemed not to be beyond the
reasonable  control  of the  Affected  Party),  then  the time  limited  for the
performance by the


                                       6



Affected Party of its obligations hereunder will be extended by a period of time
equal in length to the period of each such prevention or delay.  Nothing in this
paragraph  13.1 or this  Agreement will relieve either Party from its obligation
to maintain the claims  comprising  the Property in good  standing and to comply
with all applicable laws and regulations  including,  without limitation,  those
governing safety, pollution and environmental matters.

12.2     The Affected Party will give notice to the other party of each event of
force majeure under  paragraph  12.1 within 7 days of such event  commencing and
upon cessation of such event will furnish the other party with written notice to
that effect  together with  particulars  of the number of days by which the time
for  performing  the  obligations of the Affected Party under this Agreement has
been extended by virtue of such event of force majeure and all preceding  events
of force majeure.

13.      CONFIDENTIAL INFORMATION

13.1     The terms of this Agreement and all information  obtained in connection
with the  performance of this  Agreement  will be the exclusive  property of the
parties hereto and except as provided in paragraph  13.2,  will not be disclosed
to any third party or the public without the prior written  consent of the other
party, which consent will not be unreasonably withheld.

13.2     The consent required by paragraph 13.1 will not apply to a disclosure:

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

(b)      to any third party to whom the disclosing party contemplates a transfer
         of all or any part of its interest in this Agreement;

(c)      to a governmental  agency or to the public which such party believes in
         good faith is required by pertinent  laws or regulation or the rules of
         any applicable stock exchange; or

(d)      to an investment dealer, broker, bank or similar financial institution,
         in confidence if required as part of a due diligence  investigation  by
         such financial  institution in connection with a financing  required by
         such party or its  shareholders  or affiliates  to meet,  in part,  its
         obligations under this Agreement.

14.      DEFAULT AND TERMINATION

14.1     If at any time during the Option  Period,  a party is in default of any
requirement of this Agreement or is in breach of any provision contained in this
Agreement,  the party affected by the default (the  "Non-Defaulting  Party") may
terminate this Agreement by giving written notice of termination to the Optionee
but only if:

  (a)      it  will  have  given  to  the  other  party  written  notice  of the
           particular  failure,  default,  or  breach  on the part of the  other
           party; and

  (b)      the other party has not,  within 30 days  following  delivery of such
           written  notice of default,  cured such  default or commenced to cure
           such  default,  it being  agreed by the  Optionee  that  should it so
           commence  to  cure  any  default  it  will  prosecute  such  cure  to
           completion without undue delay.

14.2     Notwithstanding  any termination of this  Agreement,  the Optionee will
remain liable for those  obligations  specified in Section 10 and Section 15 and
the Optionor will remain liable for its obligations under Section 15.


                                       7



15.      INDEMNITY

15.1     The Optionor covenants and agrees with the Optionee (which covenant and
agreement  will  survive  the  execution,   delivery  and  termination  of  this
Agreement) to indemnify and save harmless the Optionee  against all liabilities,
claims, demands,  actions, causes of action, damages, losses, costs, expenses or
legal fees  suffered or incurred by the  Optionee,  directly or  indirectly,  by
reason of or arising out of any warranties or representations on the part of the
Optionor  herein  being untrue or arising out of work done by the Optionor on or
with respect to the Property.

15.2     The Optionee covenants and agrees with the Optionor (which covenant and
agreement  will  survive  the  execution,   delivery  and  termination  of  this
Agreement) to indemnify and save harmless the Optionor  against all liabilities,
claims, demands,  actions, causes of action, damages, losses, costs, expenses or
legal fees suffered or incurred by reason of or arising out of any warranties or
representations  on the part of the Optionee  herein being untrue or arising out
of the Optionee and its duly authorized representatives accessing the Property.

16.      GOVERNING LAW

16.1     This  Agreement  will be construed and in all respects  governed by the
laws of the Province of Ontario and the laws of Canada applicable in Ontario.

17.      NOTICES

17.1     All notices,  payments and other required communications and deliveries
to the parties  hereto will be in writing,  and will be addressed to the parties
as follows or at such other  address as the  parties  may  specify  from time to
time:

         to the Optionor:
                  Box 414
                  Souris, Manitoba
                  ROK2CO
                  Fax: 204-483-3641

         to the Optionee:
                  Amador Gold Corp.
                  16493 - 26th Avenue
                  Surrey, British Columbia V3S 9W9
                  Fax: 604-536-5358

17.2     Notices  must be  delivered,  sent by telex,  telegram,  telecopier  or
mailed by  pre-paid  post and  addressed  to the party to which  notice is to be
given.  If notice is sent by telex,  telegram or telecopier or is delivered,  it
will be deemed to have been given and  received at the time of  transmission  or
delivery.  If notice is  mailed,  it will be  deemed to have been  received  ten
business days  following  the date of the mailing of the notice.  If there is an
interruption in normal mail service due to strike,  labour unrest or other cause
at or prior to the time a notice is  mailed  the  notice  will be sent by telex,
telegram or telecopier or will be delivered.

17.3     Either  party  hereto may at any time and from time to time  notify the
other  party in writing of a change of  address  and the new  address to which a
notice will be given thereafter until further change.


                                       8



18.      ASSIGNMENT

18.1     The Option and the Optionee's rights hereunder may be assigned,  either
in whole or in part, by the Optionee to an Assignee provided that:

(a)      the Optionor gives its prior written consent to such assignment,  which
         consent may not be unreasonably withheld by the Optionor;

(b)      the Optionee at the time of  assignment is not in default of any of the
         obligations,  warranties or  representations  given  hereunder or to be
         performed by it pursuant to this Agreement;

(c)      the Optionee will not be relieved of any duty or  obligation  hereunder
         unless the Optionee has assigned its entire interest in this Agreement;
         and

(d)      each Assignee prior to the effective  date of the assignment  agrees in
         writing  with the Optionor to be bound by the terms and  conditions  of
         this Agreement.

19.      ENTIRE AGREEMENT

19.1     This Agreement  constitutes the entire  agreement  between the Optionor
and the  Optionee  and  will  supersede  and  replace  any  other  agreement  or
arrangement, whether oral or in writing, previously existing between the patties
with respect to the subject matter of this Agreement.

20.      CONSENT OR WAIVER

20.1     No consent or waiver,  express or implied,  by either  party  hereto in
respect of any breach or default by the other party in the  performance  by such
other party of its obligations  under this Agreement will be deemed or construed
to be a consent to or a waiver or any other breach or default.

21.      FURTHER ASSURANCES

21.1     The parties will promptly execute,  or cause to be executed,  all bills
of sale,  transfers,  documents,  conveyances  and other  instruments of further
assurance which may be reasonably  necessary or advisable to carry out fully the
intent and  purpose of this  Agreement  or to record  wherever  appropriate  the
respective  interests  from  time to time of the  parties  hereto  in and to the
Property.

22.      SEVERABILITY

22.1     If  any  provision  of  this  Agreement  is  or  will  become  illegal,
unenforceable or invalid for any reason whatsoever, such illegal,  unenforceable
or invalid provisions will be severable from the remainder of this Agreement and
will not  affect the  legality,  enforceability  or  validity  of the  remaining
provisions of this Agreement.

23.      ENUREMENT

23.1     This  Agreement  will enure to the  benefit of and be binding  upon the
parties hereto and their respective successors and assigns.

24.      AMENDMENTS

24.1     This  Agreement may only be amended in writing with the mutual  consent
of all parties.


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25.      AREA OF INFLUENCE

25.1     The lands included  within 1.5 kilometres from a line drawn parallel to
the  Property  boundaries  commencing  June 23, 2004 shall  describe the area of
influence.

26.      TIME

26.1     Time will be the essence of this Agreement.

27.      COUNTERPARTS

27.1     This  Agreement  may be executed in any number of  counterparts  and by
facsimile  transmission with the same effect as if all parties hereto had signed
the same document.  All counterparts  will be construed  together and constitute
one and the same agreement.


IN WITNESS  WHEREOF the parties  hereto have executed this Agreement the day and
year first above written.


1304850 ONTARIO INC.
FOR RUBICON MINERALS

By:  /s/ Perry English
- --------------------------------
Perry English (Optionor)


AMADOR GOLD CORP.

By:  /s/ Kevin Leonard
- --------------------------------
Kevin Leonard, Project Geologist


                                       10



                                  SCHEDULE "A"
                            to the Agreement between
                                PERRY ENGLISH and
                                AMADOR GOLD CORP.


                                  THE PROPERTY

                 32 claim units known as the "Maskootch Claims"
                         covering an area of 1280 acres)
                    in the Red Lake Mining Division, Ontario
                                  consisting of

                                                          EXPIRY         EXPIRY
CLAIM NAME        RECORD NO.        NO. OF UNITS          MONTH           YEAR
- ----------        ----------        ------------         -------         ------

3004393              --                  8               Feb. 17          2006
3004394              --                 16               Feb. 17          2006
3004395              --                  8               Feb. 17          2006


                                       11



                                  SCHEDULE "B"

                            to the Agreement between

                                PERRY ENGLISH AND

                                AMADOR GOLD CORP.

                          NS ROYALTY NET SMELTER RETURNS


The  Property  shall be  subject  to the NS  Royalty,  being  2% of Net  Smelter
Returns,  payable annually to the Optionor.  For the purposes of calculating the
NS Royalty,  "Net Smelter  Returns" means the actual proceeds  received from any
mint, smelter,  refinery or other purchaser for the sale of ores, metals (metals
shall  include  bullion) or  concentrates  produced  from the Property and sold,
after deducting from such proceeds the following charges to the extent that they
were not deducted by the purchaser in computing  payment:  smelting and refining
charges;  penalties;  smelter assay costs and umpire assay costs;  deductions of
the  nature  of  profit  sharing  with  any  mint,  smelter,  refinery  or other
purchaser; cost of freight and handling of ores, metals or concentrates from the
Property to any mint,  smelter,  refinery or other  purchaser;  marketing costs;
insurance  on such  ores,  metals or  concentrates;  custom  duties;  severance,
royalties,  Ad valorem or mineral  taxes of the like and export and import taxes
or tariffs payable in respect of said ores, metals or concentrates.


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