Silver Wheaton Exercises Right to Acquire 12.5% of Life of Mine Silver Production From the Loma de La Plata Zone of the Navidad Project

By Silver Wheaton Corp., PRNE
Wednesday, February 24, 2010

VANCOUVER, February 25, 2010 - Silver Wheaton Corp. ("Silver Wheaton" or the "Company") (TSX, NYSE: SLW)
is pleased to announce that it has elected to convert its debenture with Pan
American Silver Corp. ("Pan American") into an agreement to acquire an amount
equal to 12.5% of the life of mine silver production from the Loma de La
Plata zone of the Navidad project ("Navidad"). Navidad is located in the
Province of Chubut, Argentina, and is one of the largest undeveloped silver
deposits in the world. The Loma de La Plata zone contains approximately 25%
of the measured and indicated silver resources within the Navidad deposit
(see Aquiline Resources Inc. ("Aquiline") press release dated April 16,
). Pan American inherited the debenture as a result of its recent CDN$626
acquisition of Aquiline, the previous owner of the Navidad project
(see Pan American press releases dated October 14, 2009 and January 26,
). Silver Wheaton and Pan American expect to finalize the definitive
terms of the silver purchase agreement by the end of 2010.


Subject to finalizing the definitive terms of the agreement, Silver
Wheaton will pay Pan American upfront cash payments totaling US$32.4 million
to acquire an amount equal to 12.5% of all payable silver produced from the
Loma de La Plata zone at Navidad for the lesser of US$4.00 or the prevailing
market price per ounce of silver delivered. The upfront payments will be made
on an installment basis and will commence following the satisfaction of
certain conditions, including receipt of all necessary permits to proceed
with construction. Silver Wheaton will not be required to contribute to
further capital or exploration expenditures.

"It is very exciting to have a silver stream on one of the top five
silver deposits in the world to be developed by Pan American, a leading North
American silver company. This now gives Silver Wheaton a stake in the
production from three of the world's five largest silver deposits, a
considerable achievement for a company that was formed just over five years
ago," said Peter Barnes, Chief Executive Officer of Silver Wheaton. "Once in
production, Navidad has the potential to increase our long-term silver
production by approximately two million ounces per annum."

"Navidad is a world-class silver project and a flagship growth asset for
Pan American. With eight operating mines in the Americas, Pan American has
demonstrated an exceptional track record of successfully building and
operating mines, including the Manantial Espejo mine, commissioned in 2009
and located in Argentina. We are confident that the Navidad project will
deliver long term value for our shareholders."


Navidad is located in the Province of Chubut, Argentina, and is one of
the largest undeveloped silver deposits in the world. It is made up of eight
zones, seven of which should be amenable to mining in a series of open pits.
The Loma de La Plata zone is one of the highest grade zones within the
Navidad deposit and represents approximately 25% of the project's measured
and indicated silver resources. Metallurgical testing has indicated that this
zone is more receptive to conventional flotation processing than several of
the surrounding zones with forecast silver recoveries of approximately 80%
(see Aquiline October, 2008 preliminary economic assessment).

There is currently a law in the Province of Chubut prohibiting open-pit
mining and the use of cyanide. However, based on Pan American's public
disclosure, they believe that they are uniquely positioned to develop Navidad
due to their successful operating and development experience in Argentina,
their exemplary community and government relations, and their strong
environmental and safety record.

The silver resources contained within the Loma de La Plata zone, of which
12.5% would be attributable to Silver Wheaton, are as follows:

         RESOURCE             Tonnage            Grade           Contained
      CLASSIFICATION             Mt               g/t               Moz
     Indicated                 29.1              169.0             158.1
     Inferred                   1.3               76.0               3.2

Mr. Randy V.J. Smallwood, P.Eng., President of Silver Wheaton, is a
"qualified person" as such term is defined under National Instrument 43-101,
and has reviewed and approved the contents of this news release.

     1.  Mineral Reserves and Mineral Resources have been calculated in
         accordance with the standards of the Canadian Institute of Mining,
         Metallurgy and Petroleum and National Instrument 43-101.2.

     2.  Mineral Resources which are not Mineral Reserves, do not have
         demonstrated economic viability.

     3.  Mineral Resources are estimated as of April 16, 2009 and are as
         disclosed by Pan American Silver Corp. in their press release of
         October 14, 2009.

     4.  Pamela De Mark, B.Sc., P.Geo., MAusIMM, Senior Consultant (Snowden
         Mining Industry Consultants) is the Qualified Person responsible
         for the resource estimation.

     5.  Mineral Resources are reported above a silver equivalent cut-off of
         50 g/t which has been calculated using metal prices of $12.52/oz Ag
         and US$0.50 /lb Pb without considering variable recoveries for the
         two metals.


The information contained herein contains "forward-looking statements"
within the meaning of the United States Private Securities Litigation Reform
Act of 1995 and "forward-looking information" within the meaning of
applicable Canadian securities legislation. Forward-looking statements, which
are all statements other than statements of historical fact, include, but are
not limited to, statements with respect to the future price of silver and
gold, the estimation of mineral reserves and resources, the realization of
mineral reserve estimates, the timing and amount of estimated future
production, costs of production, reserve determination and reserve conversion
rates. Generally, these forward-looking statements can be identified by the
use of forward-looking terminology such as "plans", "expects" or "does not
expect", "is expected", "budget", "scheduled", "estimates", "forecasts",
"intends", "anticipates" or "does not anticipate", or "believes", or
variations of such words and phrases or statements that certain actions,
events or results "may", "could", "would", "might" or "will be taken",
"occur" or "be achieved". Forward-looking statements are subject to known and
unknown risks, uncertainties and other factors that may cause the actual
results, level of activity, performance or achievements of Silver Wheaton to
be materially different from those expressed or implied by such
forward-looking statements, including but not limited to: fluctuations in the
price of silver and gold; the absence of control over mining operations from
which Silver Wheaton purchases silver or gold and risks related to these
mining operations including risks related to fluctuations in the price of the
primary commodities mined at such operations, actual results of mining and
exploration activities, economic and political risks of the jurisdictions in
which the mining operations are located and changes in project parameters as
plans continue to be refined; and differences in the interpretation or
application of tax laws and regulations; as well as those factors discussed
in the section entitled "Description of the Business - Risk Factors" in
Silver Wheaton's Annual Information Form available on SEDAR at and in Silver Wheaton's Form 40-F on file with the U.S.
Securities and Exchange Commission in Washington, D.C. Forward-looking
statements are based on assumptions management believes to be reasonable,
including but not limited to: the continued operation of the mining
operations from which Silver Wheaton purchases silver or gold, no material
adverse change in the market price of commodities, that the mining operations
will operate and the mining projects will be completed in accordance with
their public statements and achieve their stated production outcomes, and
such other assumptions and factors as set out herein. Although Silver Wheaton
has attempted to identify important factors that could cause actual results
to differ materially from those contained in forward-looking statements,
there may be other factors that cause results not to be as anticipated,
estimated or intended. There can be no assurance that forward-looking
statements will prove to be accurate. Accordingly, readers should not place
undue reliance on forward-looking statements. Silver Wheaton does not
undertake to update any forward-looking statements that are included or
incorporated by reference herein, except in accordance with applicable
securities laws.


For further information on Mineral Reserves and Mineral Resources and on
Silver Wheaton more generally, readers should refer to Silver Wheaton's
Annual Information Form for the year ended December 31, 2008, and other
continuous disclosure documents filed by Silver Wheaton since January 1,
, available on SEDAR at Silver Wheaton's Mineral
Reserves and Mineral Resources are subject to the qualifications and notes
set forth therein. Mineral Resources which are not Mineral Reserves do not
have demonstrated economic viability.

Cautionary Note to United States Investors Concerning Estimates of
Measured, Indicated and Inferred Mineral Resources: The information contained
herein uses the terms "Measured", "Indicated" and "Inferred" Mineral
Resources. United States investors are advised that while such terms are
recognized and required by Canadian regulations, the United States Securities
and Exchange Commission does not recognize them and expressly prohibits U.S.
registered companies from including such terms in their filings with the SEC.
"Inferred Mineral Resources" have a great amount of uncertainty as to their
existence, and as to their economic and legal feasibility. It cannot be
assumed that all or any part of an Inferred Mineral Resource will ever be
upgraded to a higher category. Under Canadian rules, estimates of Inferred
Mineral Resources may not form the basis of feasibility or other economic
studies. United States investors are cautioned not to assume that all or any
part of Measured or Indicated Mineral Resources will ever be converted into
Mineral Reserves. United States investors are also cautioned not to assume
that all or any part of an Inferred Mineral Resource exists, or is
economically or legally mineable. United States investors are urged to
consider closely the disclosure in Silver Wheaton's Form 40-F, a copy of
which may be obtained from Silver Wheaton or from

For further information: Brad Kopp, Vice President, Investor Relations,
Silver Wheaton Corp., Tel: +1-800-380-8687, Email:,

For further information: Brad Kopp, Vice President, Investor Relations, Silver Wheaton Corp., Tel: +1-800-380-8687, Email: info at, Website:

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