EXHIBIT 4.19

                   Pledge Agreement, dated July 8, 2005, among

                                 0724000 BC Ltd.
                       Bulakashu Mining Company Ltd., and
                                Marsa Gold Corp.





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                                PLEDGE AGREEMENT



THIS AGREEMENT made the 8th day of July, 2005

BETWEEN:
                  CENTRASIA  MINING CORP.  (FORMERLY  "MAGELLAN GOLD CORP."),  a
                  British Columbia  corporation with an address of 300 - 1055 W.
                  Hastings St., Vancouver, BC V6E 2E9, Canada

                  (the "Lender")

AND:
                  MARSA GOLD CORP., a Kyrgyz limited  liability  company with an
                  address of Kyrgyz Republic, Bishkek, microregion 11, 6-46

                  (the "Guarantor")

AND:
                  BULAKASHU  MINING  COMPANY  LTD,  a Kyrgyz  limited  liability
                  company with an address of 37, Baitik Baatyr St.,  Oktyabrskiy
                  district, Bishkek, 720005, Kyrgyz Republic


                  (the "Company")

WHEREAS:

A.                Under the loan agreement of September 24, 2004, the Lender has
                  lent the Company  US$110,000 to date, and may lend the Company
                  additional  sums pursuant to an Agreement of even date between
                  the Guarantor,  the Company,  the Lender,  Baradero  Resources
                  Limited and Magellan  Gold (BVI) Inc. (the  "Bulakashu  Option
                  Agreement"),  and the  Lender has  refused  to do so  without,
                  among other things, a personal guarantee of repayment from the
                  undersigned.

B.                The  Guarantor  has agreed to guarantee the current and future
                  indebtedness of the Company to the Lender, whether pursuant to
                  the Bulakashu Option  Agreement or otherwise,  pursuant to the
                  terms of a  guarantee  dated the date of this  Agreement  (the
                  "Guarantee"); and

C.                The Guarantor has agreed to execute and deliver this Agreement
                  to the Lender as security for the payment and  performance  of
                  all of the Liabilities (as hereinafter defined) of the Company
                  and the Guarantor to the Lender.

NOW THEREFORE THIS AGREEMENT WITNESSES that in consideration of the premises and
the  agreements  herein  contained,  the  Guarantor  and the Lender  covenant as
follows:

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                                      -2-


1.       PLEDGE.  The  Guarantor  assigns,  mortgages,  charges,  pledges to and
         grants to the Lender a security interest in the participating  interest
         held by the Guarantor in the Company.

         The above participating  interest is referred to herein as the "Pledged
         Interest".

2.       REPRESENTATIONS AND WARRANTIES.  The Guarantor  represents and warrants
         to the Lender that:

         (a)      it is the legal and beneficial owner of the Pledged Interest;

         (b)      the Pledged Interest is valid,  fully-paid,  in the capital of
                  the Company;

         (c)      the  Pledged   Interest  is  free  and  clear  of  all  liens,
                  mortgages,  charges and  security  interests  other than those
                  created under this Agreement in favour of the Lender; and

         (d)      to the best of Guarantor's knowledge,  the Pledged Interest is
                  not subject to any cease trade order,  stop transfer or resale
                  restriction, or any similar restriction that would restrict or
                  prevent the Lender from assigning or  transferring  such share
                  upon the  occurrence of a default  hereunder,  except for such
                  restrictions imposed by law or the constating documents of the
                  Company.

3.       TITLE  TRANSFER  ON  DEFAULT.  On the date of a material  breach of the
         Bulakashu  Option Agreement by any party thereto other than the Lender,
         Baradero Resources Limited or Magellan Gold (BVI) Inc., the Liabilities
         shall become immediately due and payable and the Lender may at any time
         after that date have the  Guarantor to transfer to the Lender the title
         to the Pledged Interest through execution of agreement, other documents
         and  taking  other  actions  in  accordance  with any  applicable  law,
         including,  but not limited to, take or cause to be taken all corporate
         actions approving  transfer of Pledged Interest,  to have the Bulakashu
         charter  amended and  reregistered  with the Ministry of Justice of the
         Kyrgyz Republic.

4.       COSTS AND EXPENSES.  All costs and charges  incurred by or on behalf of
         the Lender in connection  with the  collection of amounts due and owing
         under the  Guarantee,  this  Agreement or with reference to the Pledged
         Interest  or  its  realization   (including   without   limitation  all
         reasonable  legal  fees and  court  costs  and all  expenses  of taking
         possession  of,  protecting  and  realizing  upon the Pledged  Interest
         including costs and charges in connection  with realizing,  collecting,
         selling,  transferring or delivering the Pledged Interest or exercising
         or  enforcing  any rights under them) will be added to and form part of
         the  Liabilities  and will be a first  charge  on the  proceeds  of any
         realization,   collection,   sale,  transfer,   delivery,  exercise  or
         enforcement.

5.       APPLICATION  OF PROCEEDS.  The proceeds of  disposition  of the Pledged
         Interest will be applied by the Lender on account of the Liabilities in
         such  manner,  order and  priority  as the  Lender  may in its sole and
         absolute discretion determine. If, after the realization or disposition
         of the Pledged Interest and  satisfaction of the Liabilities  there are
         any surplus  Pledged  Interest or proceeds of  disposition,  the Lender
         will  account  for  such  surplus  Pledged   Interest  or  proceeds  of
         disposition to the Guarantor.


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                                      -3-



6.       NO  MERGER.  This  shall  be a  continuing  agreement  and the  Pledged
         Interest  will not  operate by way of merger of any of the  Liabilities
         and no judgment  recovered  by the Lender will operate by way of merger
         of or in any way affect the  security  now or in the future held by the
         Lender  in  respect  of the  Liabilities  or in  respect  of any  other
         obligations of the Guarantor.

7.       LENDER TO  EXERCISE  CARE.  The Lender will be bound to exercise in the
         keeping  of the  Pledged  Interest  only the same  degree of care as it
         would exercise concerning its own securities at the same place.

8.       APPOINTMENT OF ATTORNEY-IN-FACT. The Guarantor hereby agrees to execute
         and deliver to the Lender a Power of  Attorney in the form  attached to
         this Agreement to be dated the same date as this Agreement, pursuant to
         which the Guarantor shall appoint Douglas S. Turnbull, on behalf of the
         Lender, as the  attorney-in-fact of the Guarantor,  with full power and
         authority to exercise all rights of the Guarantor as a  participant  of
         the Company  including  executing  and  delivering  any  amendments  or
         modifications to the Charter of the Company, and to transfer, pledge or
         otherwise dispose of the Pledged Interest.

9.       ATTACHMENT.  The Guarantor and the Lender  acknowledge that it is their
         intention that the security  interests created by this Agreement attach
         on execution by the Guarantor and that value has been given.

10.      ALTERATION OF CAPITAL. In the event of any change to the capital of the
         Company, the term "Pledged Interest" will be considered to refer to the
         Pledged  Interest  described  in paragraph 1 as  increased,  decreased,
         amended or supplemented and the Guarantor will deliver  immediately any
         replacement  accompanied  by powers of attorney,  certified  directors'
         resolutions  and such other  documents  or  instruments  the Lender may
         require, to be held in accordance with the terms of this Agreement.

11.      DISCHARGE.  On the  Closing  Date (as defined in the  Bulakashu  Option
         Agreement)  the  Guarantor  will  cause  the  Pledged  Interest  to  be
         transferred  to the  Lender.  In the  event of the  termination  of the
         Bulakashu Option Agreement  pursuant to section 12 thereof,  the Lender
         will return the Pledged  Interest , will transfer the Pledged  Interest
         to the  Guarantor,  and will  release  the  Pledged  Interest  from the
         assignment,  mortgage,  charge,  hypothecation,   pledge  and  security
         interest  created by this Agreement and will execute and deliver to the
         Guarantor  such  releases  and   reassignments  as  the  Guarantor  may
         reasonably require for such purpose.

12.      BINDING  EFFECT.  The provisions of this Agreement will be binding upon
         and enure to the  benefit  of the Lender  and the  Guarantor  and their
         respective successors and assigns.

13.      GOVERNING  LAWS.  This Agreement will be governed by and interpreted in
         accordance with the laws of British Columbia.  All disputes arising out
         of or in connection with this  Agreement,  or in respect of any defined
         legal relationship associated therewith or derived therefrom,  shall be
         referred to and finally resolved by arbitration in the English language
         using  a sole  arbitrator  under  the  rules  of the  British  Columbia
         International  Commercial  Arbitration Centre. The appointing authority
         or tribunal  shall be the  British  Columbia  International  Commercial
         Arbitration  Centre.  The case  shall be  administered  by the  British
         Columbia International Commercial Arbitration Centre in accordance with
         its  Rules.  The  place  of  arbitration  shall be  Vancouver,  British
         Columbia, Canada.


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                                      -4-


14.      NOTICES. In this Agreement:

         (a)      any notice or communication  required or permitted to be given
                  under this Agreement will be in writing and will be considered
                  to have  been  given  if  delivered  by hand,  transmitted  by
                  facsimile transmission or mailed by prepaid registered post to
                  the address or facsimile transmission number of each party set
                  out on the first  page  hereof  or to such  other  address  or
                  facsimile  transmission  number as any party may  designate in
                  the manner set out above; and

         (b)      notice  or  communication  will be  considered  to  have  been
                  received:

                  i.       if hand-delivered during business hours on a Business
                           Day, upon receipt by a responsible  representative of
                           the receiver,  and if not delivered  during  business
                           hours,  upon the commencement of business on the next
                           Business Day;

                  ii.      if sent by  facsimile  transmission  during  business
                           hours on a Business  Day,  upon the sender  receiving
                           confirmation   of  the   transmission,   and  if  not
                           transmitted   during   business   hours,   upon   the
                           commencement  of business on the next  Business  Day;
                           and

                  iii.     if mailed by prepaid  registered  post upon the fifth
                           business day following  posting;  except that, in the
                           case of a disruption  or an  impending or  threatened
                           disruption  in  postal   services   every  notice  or
                           communication  will be  delivered  by hand or sent by
                           facsimile transmission.

15.      COUNTERPARTS.  This Agreement may be executed in several  counterparts,
         each of which so executed will be considered to be an original and such
         counterparts together will be one and the same instrument.

16.      FURTHER  ASSURANCES.  The  Guarantor  will from  time to time,  whether
         before or after the  occurrence of any default  hereunder,  do all such
         acts and things and execute  and  deliver  all such  deeds,  transfers,
         assignments  and  instruments as the Lender may reasonably  require for
         perfecting the security interest  constituted by this Agreement and for
         facilitating  the sale of the Pledged  Interest in connection  with any
         realization and for exercising all powers,  authorities and discretions
         conferred upon the Lender. The Guarantor  covenants and agrees with the
         Lender  to  discharge  or  cause  to  be   discharged   forthwith   any
         encumbrances  which  may rank  equal  or in  priority  to the  Lender's
         security  interest herein,  and to provide the Lender with satisfactory
         evidence or other  confirmation  that any encumbrances or liens against
         the Guarantor do not encumber the Pledged Interest .

17.      SEVERABILITY. If any term of this Agreement is determined to be invalid
         or   unenforceable,   in  whole  or  in  part,   such   invalidity   or
         unenforceability  will attach only to such term, and all other terms of
         this Agreement will continue in full force and effect.

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                                      -5-



18.      ACKNOWLEDGEMENT AND WAIVER. The Guarantor hereby acknowledges receiving
         a copy of this  Agreement  and waives  all  rights to receive  from the
         Lender a copy of any financing statement, financing change statement or
         verification statement filed or issued, as the case may be, at any time
         in respect of this Agreement or any amendment thereto.

IN WITNESS  WHEREOF the parties have entered into this  Agreement as at the date
first above written.

CENTRASIA MINING CORP.


Per: /s/ Douglas Turnbull
    ------------------------------
         Authorized Signatory


BULAKASHU MINING COMPANY LTD



Per:  /s/ Oleg Kim
    ------------------------------
         Authorized Signatory


MARSA GOLD CORP.


Per:  /s/ Dmitriy Vedeshkin-Ryabov
    ------------------------------
         Authorized Signatory


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                           [LETTERHEAD OF MARSA GOLD]
                MARSA GOLD CORP. KRYGYZ REPUBLIC, BISHEK, 11 mkp

                                POWER OF ATTORNEY


         MARSA GOLD ("MARSA GOLD")  Limited  Liability  Company,  a legal entity
created  and  existing  under  the  laws  of the  Kyrgyz  Republic,  having  its
registered office located at: Kyrgyz Republic,  Bishkek, 11th microregion,  6-46
is a shareholder of Bulakashu  Mining Company LTD,  organized  under the laws of
the Kyrgyz Republic ("BULAKASHU").

         Marsa Gold hereby  constitutes  and appoints Mr. Douglas S. Turnbull of
300 - 1055 W. Hastings St.,  Vancouver,  BC V6E 2E9 CANADA, for and on behalf of
Centrasia Mining Corp., as its true and lawful  attorney-in-fact with full power
and authority to do on behalf of and in the name of Marsa Gold the following:

         1.       To  exercise  all  rights of Marsa  Gold as a  participant  of
                  Bulakashu including executing and delivering any amendments or
                  modifications to the Charter of Bulakashu; and

         2.       To transfer,  pledge or otherwise dispose of the participating
                  interest held by Marsa Gold in Bulakashu.

This  power of  attorney  is issued on July 12,  2005 and is valid for three (3)
years.

IN WITNESS  WHEREOF,  the  undersigned  has set his hand and affixed the seal of
Marsa Gold on this July 12, 2005.


         By:      /s/ D.G. VEDESHKIN-RYABOV
                  --------------------------------------
                  Signature of Authorized Representative


                  D.G. VEDESHKIN-RYABOV
                  --------------------------------------
                  Name of Authorized Representative


                  GENERAL DIRECTOR
                  --------------------------------------
                  Title


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