VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 8, 2011) - Endeavour Silver Corp. (TSX:EDR)(NYSE Amex:EXK)(DBFrankfurt:EJD) announced today that for the seventh consecutive year, the Company has grown its silver and gold resources in Mexico. 

Endeavour released today its updated NI 43-101 reserve and resource estimates to December 31, 2010 (see table below) for its two producing silver mines (the Guanacevi Mine in Durango State and the Guanajuato Mine in Guanajuato State) and two exploration projects (the Parral Project in Chihuahua and Arroyo Seco Project in Michoacán) in Mexico. 

Endeavour's reserves dipped by year-end as a result of mine production exceeding forecast targets and mine development falling behind schedule. Notwithstanding the decrease in reserves the Company's Indicated Resources gained 16% to 27.4 million oz. and Inferred Resources increased by 62% to 29.7 million oz. In addition, the Company plans to accelerate mine development this year in order to once again expand the reserves in 2011. The reserve and resource highlights are as follows:

2010 Reserve/Resource Highlights

  • Silver Proven and Probable Reserves down 19% to 13.4 million ounces (oz); Guanacevi 12.0 million oz and Guanajuato 1.4 million oz.
  • Gold Proven and Probable Reserves down 9% to 40,000 oz; Guanacevi 22,000 oz and Guanajuato 18,000 oz.
  • Silver Equivalent Proven and Probable Reserves down 18% to 15.9 million oz; Guanacevi 13.4 million oz and Guanajuato 2.5 million oz.
  • Silver Indicated Resources up 16% to 27.4 million oz; Guanacevi 17.2 million oz, Guanajuato 7.6 million oz and Parral 2.6 million oz.
  • Gold Indicated Resources up 53% to 182,000 oz; Guanacevi 34,000 oz, Guanajuato 101,00 oz and Parral 47,000 oz.
  • Silver Equivalent Indicated Resources up 19% to 37.3 million oz; Guanacevi 19.2 million oz, Guanajuato 13.1 million oz and Parral 5.0 million oz.
  • Silver Inferred Resources up 62% to 29.7 million oz; Guanacevi 14.5 million oz, Guanajuato 7.3 million oz, Parral 2.7 million oz and Arroyo Seco 5.2 million oz.
  • Gold Inferred Resources up 52% to 169,000 oz; Guanacevi 30,000 oz, Guanajuato 100,000 oz, Parral 37,000 oz, Arroyo Seco 2,000 oz.
  • Silver Equivalent Inferred Resources up 52% to 38.9 million oz; Guanacevi 16.3 million oz, Guanajuato 12.8 million oz, Parral 4.5 million oz, Arroyo Seco 5.3 million oz.
    • Mineral resources are exclusive of the mineral reserves.
    • Proven Reserves are determined as being with 10 meters of development while Probable reserves are a further 15 meters. In both cases mine plans have been developed on the reserves.
    • Mine plans are developed on the Reserves and Indicated Resources but the Resources are discounted in the mine plan.
    • Mineral reserves have demonstrated economic viability whereas mineral resources do not.
    • 2009 silver equivalents based on 65:1 silver:gold ratio, base metals not included.
    • 2010 silver equivalents based on 50:1 silver:gold ratio for exploration and 65:1 for the mines, base metals not included.
    • All assumptions used are listed at the bottom of the reserve and resource summary table.

Bradford Cooke, Chairman and CEO, commented, "We are gratified to see our combined reserves and resources rise once again to a record high last year, notwithstanding our 6th consecutive year of production growth. The numbers speak to the ability and success of our exploration team at discovering new, high grade silver-gold deposits year after year within these historic Mexican silver districts."

"Last year, it was our Epsilon/La Blanca/Noche Buena discoveries in the San Pedro area of Guanacevi, the Lucero/Karina/Fernanda/Daniela discoveries in Guanajuato and the San Juanico extension in Parral that helped drive our resource growth. In 2011, Endeavour will continue to focus on the organic growth of its reserves/resources in Guanacevi and Guanajuato through its ongoing strategic acquisition and exploration programs within these districts."

"However, we are also looking to new acquisitions such as the San Sebastian properties in Jalisco and other pending property deals to help fuel our resource growth this year. Management will continue to evaluate M&A opportunities as a means to accelerate Endeavour's growth profile."

Barry Devlin, M.Sc., P. Geo., the Vice President of Exploration for Endeavour, is the Qualified Person who reviewed this news release and supervised the updated reserve and resource estimates. Endeavour mine and exploration personnel prepared the updated reserves and resources to December 31, 2010 for the Guanacevi and Guanajuato mines.

Endeavour retained Micon International Limited (Micon) to independently audit the updated reserves and resources for the Guanacevi and Guanajuato mines and also for the Parral project. The Qualified Persons for Micon are William J. Lewis, B.Sc., P.Geo., Charley Murahwi, M.Sc., P.Geo, MAusIMM, Dibya Kanti Mukhopadhyay, MAusIMM, Robert J. Leader, P.Eng.,. Micon's report for the Parral project has been filed on Sedar and the reports for Guanacevi and Guanajuato will be filed on SEDAR before the end of March once they have been completed. The Arroyo Seco report was authored by David St Clair Dunn B.Sc.,P.Geo and Barry Devlin M.Sc., P. Geo, who are both Qualified Persons and it will be filed on Sedar at the same time as the Guanacevi and Guanajuato reports.

Reserves and Resources (as of December 31, 2010)
Reserves Proven & Probable
Description  Tonnes Ag g/t Au g/t Ag oz Au oz
 Guanacevi 576,000 313 0.62 5,796,000 11,400
 Guanajuato 141,000 189 2.50 856,000 11,300
Total Proven 717,000 289 0.98 6,652,000 22,700
 Guanacevi 815,800 237 0.40 6,219,000 10,500
 Guanajuato 100,000 158 2.20 508,000 7,100
Total Probable 915,800 228 0.60 6,727,000 17,600
Total Proven & Probable 1,632,800 255 0.77 13,379,000 40,300
Resources Indicated  
Description  Tonnes Ag g/t Au g/t Ag oz Au oz
 Guanacevi 1,653,700 258 0.56 13,719,000 29,600
 Guanajuato 1,443,000 163 2.18 7,554,000 101,100
Total Indicated 3,096,700 214 1.31 21,273,000 130,700
Total Indicated 3,096,700 214 1.31 21,273,000 130,700
Resources Inferred
Description Tonnes Ag g/t Au g/t Ag oz Au oz
 Guanacevi 1,426,000 261 0.60 11,982,000 27,500
 Guanajuato 1,475,000 155 2.11 7,345,000 100,000
Total Inferred 2,901,000 207 1.37 19,327,000 127,500
Silver-Gold-Lead-Zinc Resources (as of December 31, 2010)  
Description Tonnes Ag g/t Au g/t Ag oz Au oz Pb % Zn %
Resources Indicated  
Guanacevi 655,200 166 0.21 3,497,000 4,500 0.61   1.02  
Parral 1,631,000 49 0.90 2,590,000 47,200 2.87   2.86  
Total Indicated 2,286,200 83 0.70 6,087,000 51,700 2.22   2.33  
Description Tonnes Ag g/t Au g/t Ag oz Au oz Pb % Zn %
Resources Inferred  
Guanacevi 644,100 125 0.14 2,582,000 3,000 1.15   2.13  
Parral 1,302,900 63 0.88 2,659,000 36,900 2.55   2.28  
Arroyo Seco 738,200 220 0.07 5,221,000 1,700 0.65   0.18  
Total Indicated 2,685,200 121 0.48 10,462,000 41,600 1.69   1.67  
1. Reserve cutoff at Guanacevi is 122 g/t Ag       
2. Reserves cutoff at Guanajuato is 102 g/t Ag       
3. Mining mining width is 1.5 meters       
4. Dilution is 15% after it has been diluted to a minimum mining width if required    
5. Resources cutoff for the Guanajuato and Guanacevi projects is 100 Ag eq     
6. Resources Silver equivalent is 50:1 for Silver to Gold      
7. Reserve Silver equivalent is 62:1 for Silver to Gold which is the three year trailing average ratio as required in reserve estimation 
8. At the Paral project a cut off using a NSR of $40 is used with the prices listed below
9.  The cutoff used for Arroyo Seco was 100 g/t Ag
Net Smelter Return (NSR) Cut-off Parameters for the Parral Project
Description Parameter
Gold Price US $1,000 per oz
Silver Price US $16 per oz
Lead Price US $0.65 per lb
Zinc Price US $0.65 per lb
Gold Recovery (Overall) 75%
Silver Recovery (Overall) 71%
Lead Recovery (Overall) 80%
Zinc Recovery (Overall) 74%
Smelter Terms Based on generic contract

These reserve and resource statements were classified following the definitions and guidelines of the Canadian Institute of Mining, Metallurgy and Petroleum CIM standards and definitions on Mineral Resources and Reserves and the guidelines of NI 43-101. 


Bradford Cooke, Chairman and CEO

About Endeavour Silver Corp. – Endeavour Silver is a mid-cap silver mining company focused on the growth of its silver production, reserves and resources in Mexico. Since start-up in 2004, Endeavour has posted six consecutive years of growing silver production, reserves and resources. The organic expansion programs now underway at Endeavour's two operating silver mines in Mexico combined with its strategic acquisition and exploration programs should help Endeavour achieve its goal to become the next premier mid-tier silver mining company.


This news release 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. Such forward-looking statements and information herein include, but are not limited to, statements regarding Endeavour's anticipated future performance, including silver and gold production, timing and expenditures to develop new silver mines and mineralized zones, silver and gold grades and recoveries, cash costs per ounce, capital expenditures and sustaining capital and the use of proceeds from the Company's recent financing. The Company does not intend to, and does not assume any obligation to update such forward-looking statements or information, other than as required by applicable law. Forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Endeavour and its operations to be materially different from those expressed or implied by such statements.

Such factors include, among others: fluctuations in the prices of silver and gold, fluctuations in the currency markets (particularly the Mexican peso, Canadian dollar and U.S. dollar); changes in national and local governments, legislation, taxation, controls, regulations and political or economic developments in Canada and Mexico; operating or technical difficulties in mineral exploration, development and mining activities; risks and hazards of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected geological conditions, pressures, cave-ins and flooding); inadequate insurance, or inability to obtain insurance; availability of and costs associated with mining inputs and labour; the speculative nature of mineral exploration and development, diminishing quantities or grades of mineral reserves as properties are mined; the ability to successfully integrate acquisitions; risks in obtaining necessary licenses and permits, and challenges to the company's title to properties; as well as those factors described in the section "risk factors" contained in the Company's most recent form 40F/Annual Information Form filed with the S.E.C. and Canadian securities regulatory authorities. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or information, there may be other factors that cause results to be materially different from those anticipated, described, estimated, assessed or intended. There can be no assurance that any forward-looking statements or information will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements or information. Accordingly, readers should not place undue reliance on forward-looking statements or information.

Contact Information: Endeavour Silver Corp.
Hugh Clarke
(604) 685-9775 or Toll Free at 877-685-9775
(604) 685-9744 (FAX)