August 30 th , 2011
Excelsior Mining Corp. (TSX-V: MIN) to announce that the initial hydr ological and metallurgical tests complete. Results are being compiled and will be r eleased within the next several weeks are finalized. The Gunnison Property is
“We look forward to releasing these results in Sept e as an ISR (in- situ recovery) project “These results will be used to complete a Preliminary Economic Assessment expected later this year.”
The hydrological program consist ed pumping and injecting water to determine the permeability of the mineralization supplement the two historical hydrological holes dr illed by 1990’s that demonstrated Gunnison can be mined using ISR techniques.
The metallurgical program consisted of sending samp les from two drill holes to Hazen Laboratory in Denver, Colorado for column leach testing.
understanding of in-situ copper extraction on the Gu
Excelsior’s exploration work on the Gunnison Property is supervised by Stephen Twyerould, Fellow of AUSIMM, President and CEO of Excelsior and a Twyerould has reviewed and is responsible for the technical info release.
About Excelsior
Excelsior is an exploration and development company with a porphyry belt of Arizona. The Gunnison Copper Project is located close to the required infrastruc and with its in- situ recovery potential, is intended for near consists of experienced professionals with proven t rack record production.
Further details about Excelsior can be found at: about the Gunnison Copper Project can be found in t he technical report filed on SEDAR at www.sedar.com entitled: Gunnison Copper Project, Cochise County, Arizona, USA, Mineral Resource of the North Star and South Star Deposits dated June 2010.
ON BEHALF OF THE EXCELSIOR BOARD
T: 604-681-8030
F: 604-681-8039
NEWS RELEASE
Completes Hydrological and Metallurgical Programs
(TSX-V: MIN) (OTCQX: EXMGF) V: MIN) (OTCQX: EXMGF) (Frankfurt: 3XS) (“ Excelsior ological and metallurgical tests on the Gunnison Copper Property complete. Results are being compiled and will be r eleased within the next several weeks are finalized. The Gunnison Property is located within the copper porphyry belt in southern Arizona.
“We look forward to releasing these results in Sept e mber as they are crucial in developing this deposit situ recovery) project ,” says Stephen Twyerould, President and CEO of Excels ior.
These results will be used to complete a Preliminary Economic Assessment expected later this year.” ed of drilling two holes within the North Star deposit determine the permeability of the mineralization .
supplement the two historical hydrological holes dr illed by Magma Copper Corporation in the mid Gunnison can be mined using ISR techniques.
The metallurgical program consisted of sending samp les from two drill holes to Hazen Laboratory in Denver, Colorado for column leach testing. The c olumn leach tests will greatly improve the current situ copper extraction on the Gu nnison Property.
Excelsior’s exploration work on the Gunnison Property is supervised by Stephen Twyerould, Fellow of AUSIMM, President and CEO of Excelsior and a Qualified Person as defined by NI 43 responsible for the technical info rmation contained in this news Excelsior is an exploration and development company with a copper project located within the copper porphyry belt of Arizona. The Gunnison Copper Project is located close to the required infrastruc situ recovery potential, is intended for near -term production. The Excelsior team consists of experienced professionals with proven t rack record s of advancing projects towards Further details about Excelsior can be found at: http://www.excelsiormining.com . Further information about the Gunnison Copper Project can be found in t he technical report filed on SEDAR at entitled: Gunnison Copper Project, Cochise County, Arizona, USA, Mineral Resource of the North Star and South Star Deposits dated June 2010.
ON BEHALF OF THE EXCELSIOR BOARD
"Stephen Twyerould" President & CEO
Completes Hydrological and Metallurgical Programs (OTCQX: EXMGF) (Frankfurt: 3XS) Excelsior ”) is pleased Gunnison Copper Property are complete. Results are being compiled and will be r eleased within the next several weeks once they the copper porphyry belt in southern Arizona.
as they are crucial in developing this deposit says Stephen Twyerould, President and CEO of Excels ior.
These results will be used to complete a Preliminary Economic Assessment expected later this year.” of drilling two holes within the North Star deposit and included This new data will Magma Copper Corporation in the mid The metallurgical program consisted of sending samp les from two drill holes to Hazen Laboratory in olumn leach tests will greatly improve the current Excelsior’s exploration work on the Gunnison Property is supervised by Stephen Twyerould, Fellow of Qualified Person as defined by NI 43 -101. Mr.
rmation contained in this news copper project located within the copper porphyry belt of Arizona. The Gunnison Copper Project is located close to the required infrastruc ture term production. The Excelsior team of advancing projects towards Further information about the Gunnison Copper Project can be found in t he technical report filed on SEDAR at entitled: Gunnison Copper Project, Cochise County, Arizona, USA, Mineral www.excelsiormining.com
Cautionary Note Regarding Forward-Looking Information
Information set forth in this news release may invo lve forward-looking statements under applicable sec urities laws. Forward-looking statements are statements that relate to future, no t past, events. In this context, forward-looking st atements often address expected future business and financial performance, and ofte n contain words such as "anticipate", "believe", "p lan", "estimate", "expect", and "intend", statements that an action or event "may", "might", "could", "should", or "will" be taken or occur, or other similar expressions. All statements, other than statements of historical fact, included herein including, without limitation; statements about the completion of a Preliminary Economic Assessment and the potent ial to use in-situ recovery methods on the Gunnison Copper Project are forward-looking statements. By their nature, forwar d-looking statements involve known and unknown risk s, uncertainties and other factors which may cause our actual results, perform ance or achievements, or other future events, to be materially different from any future results, performance or achievements express ed or implied by such forward-looking statements. S uch factors include, among others, the following risks: the need for additiona l financing; operational risks associated with mine ral exploration; fluctuations in commodity prices; title matters; environmental liab ility claims and insurance; reliance on key personn el; the potential for conflicts of interest among certain officers, directors or promoters with certain other projects; the absence of di vidends; competition; dilution; the volatility of our common share price and volume and the additional risks identified the management dis cussion and analysis section of our interim and most recent annual financial sta tement or other reports and filings with the TSX Ve nture Exchange and applicable Canadian securities regulations. Forward-looking st atements are made based on management's beliefs, es timates and opinions on the date that statements are made and Excelsior und ertakes no obligation to update forward-looking sta tements if these beliefs, estimates and opinions or other circumstances shoul d change, except as required by applicable securiti es laws. Investors are cautioned against attributing undue certainty to forward-looking statements.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility fo r the adequacy or accuracy of this release, and no securities regulatory authority has either approved or disapproved of the contents of this release.