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Inmet Announces Mineral Reserves and Resources as at December 31, 2012
Published : February 11, 2013
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TORONTO, CANADA--(Marketwire - Feb. 11, 2013) -

All dollar references in US $

Inmet Mining Corporation (Inmet) (News - Market indicators) announces updated mineral reserves and resources as at December 31, 2012 as reported in the table below. Inmet's share of consolidated contained metal in reserves and resources, net of 2012 mining, and on a pro forma basis reflecting a current 80% ownership of Cobre Panama, has changed from the reported Mineral Reserves and Resources as at December 31, 2011 as follows: 

  • Proven and probable copper reserves have increased by 22% to 10.5 million tonnes contained copper from 8.5 million tonnes in 2011.

  • Proven and probable gold reserves have increased by 1.7 million contained gold ounces.

  • Measured and indicated copper resources have increased by 133,000 tonnes.

  • Inferred copper resources have increased by 155,000 tonnes.

The main changes by individual mine or development property, net of 2012 mining, are as follows (on a 100% ownership basis) and quoted on a contained metal basis:

Cobre Panama

  • Reserves increased by 2.5 million tonnes of copper, 2.2 million ounces of gold, 27 million ounces of silver and 24,000 tonnes of molybdenum. These increases to reserves reflect the addition of the Balboa, Brazo and Botija-Abajo deposits, resulting in an increase of 27% to total estimated copper, and 43% to total estimated gold.

  • The Cobre Panama mineral reserves have been estimated using a conservative $2.25/lb copper price, unchanged from the 2011 copper price assumption. The reserves will be re-estimated in 2013 using a $3.00/lb copper price.

  • The mine life has been extended from 31 years to 40 years with continued potential for further extension, and drilling underway at the next target area.

Las Cruces

  • Reserves increased by 43,000 tonnes of copper based on the results of a 2012 infill drilling program.

  • Inferred resources increased by 15,000 tonnes of copper, based on the same reason as above.

  • Addition of 38 million tonnes of primary sulphide inferred resources grading 1.1% copper, 2.6% zinc, 1.3% lead, and 27 g/t silver, for contained metal estimated to be 400,000 tonnes of copper, 1 million tonnes of zinc, 500,000 tonnes of lead, and 33.4 million ounces of silver, with no recovery estimates applied. The cut-off grade is 1.0% copper equivalent (CuEq) assuming a potential underground extraction method with a total site operating cost of approximately $50 per tonne.

  • No significant change to the gossan mineral resources first estimated in 2012.

  • Expected mine life to end in 2022, based on current secondary copper reserves. Our primary sulphide studies to be undertaken this year will target a throughput range of 2.5 to 4 million tonnes per year. If these studies demonstrate economic viability, this would translate into an expected additional 10 to 15 years of mine life. 

Çayeli

  • Reserves increased by 6,000 tonnes of copper and 24,000 tonnes of zinc, mainly as a result of using a copper price assumption of $2.75/lb instead of the $2.25/lb copper price used for the estimate as at December 31, 2011.

  • Measured and indicated resources increased by 51,000 tonnes of copper to 205,000 tonnes of copper and by 36,000 tonnes of zinc to 156,000 tonnes of zinc, mainly as a result of using a copper price assumption of $2.75/lb instead of the $2.25/lb copper price used for the estimate as at December 31, 2011.

  • Expected mine life based on current reserves unchanged at 2019, with potential at current production rates, for further extension by up to 3 years as work continues to convert resources to reserves.

Pyhäsalmi

  • Reserves increased by 5,000 tonnes of copper and 2,000 tonnes of zinc, mainly as a result of using a copper price assumption of $2.75/lb instead of the $2.25/lb copper price used for the estimate as at December 31, 2011.

  • Measured resources increased by 6,000 tonnes of copper and 4,000 tonnes of zinc, mainly as a result of using a copper price assumption of $2.75/lb instead of the $2.25/lb copper price used for the estimate as at December 31, 2011. 

  • Expected mine life to end in 2019.

The year end 2012 mineral reserves and resources table is as follows:

TABLE 1

Mineral reserves
                    Contained Metal (x 1000)  
  Category Tonnes Cu Zn Pb Au Ag S Mo Cu
tonnes
Zn Pb Au   Ag Mo Inmet's
    (x 1000) % % % g/t g/t % % tonnes tonnes ounces   ounces tonnes Interest
Cobre
Panama
Proven 258,000 0.57 - - 0.14 1.60 - 0.010 1,453 - - 1,118   13,000 24 80%
  Probable 2,800,000 0.37 - - 0.07 1.30 - 0.006 10,360 - - 6,170   118,000 168 80%
  Total 3,058,000 0.38 - - 0.07 1.33 - 0.006 11,813 - - 7,300   131,000 192 80%
          Inmet's share (80%) 9,450 - - 5,840   104,800 154  
Las
Cruces
Proven 2,644 6.72 - - - - - - 178 - - -   - - 100%
  Probable 11,488 5.14 - - - - - - 590 - - -   - - 100%
  Total 14,132 5.44 - - - - - - 768 - - -   - - 100%
Çayeli Proven 4,490 3.02 3.19 - 0.36 27.0 - - 136 143 - 52   3,898 - 100%
  Probable 2,585 3.12 4.42 - 0.43 36.0 - - 81 114 - 36   2,992 - 100%
  Total 7,075 3.06 3.64 - 0.39 30.3 - - 216 258 - 89   6,824 - 100%
Pyhäsalmi Proven 8,482 1.07 1.85 - 0.40 14.0 42 - 91 157 - 109   3,818 - 100%
  Probable - - - - - - - - - - - -   - - 100%
  Total 8,482 1.07 1.85 - 0.40 14.0 42 - 91 157 - 109   3,818 - 100%
          Inmet's share (100%) 1,075 415   198   10,642    
          Grand Total Inmet's share 10,526 415   6,038   115,442 154  
 
Mineral resources (inclusive of mineral reserves)
                    Contained Metal (x 1000)  
  Category Tonnes Cu Zn Pb Au Ag S Mo Cu
tonnes
Zn Pb Au   Ag Mo Inmet's
    (x 1000) % % % g/t g/t % % tonnes tonnes ounces   ounces tonnes Interest
Cobre
Panama
Measured 262,000 0.56 - - 0.13 1.5 - 0.009 1,476 - - 1,118   13,000 24 80%
  Indicated 3,941,000 0.34 - - 0.06 1.2 - 0.005 13,342 - - 7,888   157,000 214 80%
  Total 4,203,000 0.35 - - 0.07 1.3 - 0.006 14,820 - - 9,006   170,000 239 80%
          Inmet's share (80%) 11,856 - - 7,205   136,000 191  
Cobre
Panama
Inferred 3,686,000 0.23 - - 0.04 1.0 - 0.004 8,318 - - 4,396   115,000 156 80%
          Inmet's share (80%) 6,654 - - 3,517   92,000 125  
 
Mineral resources (exclusive of mineral reserves)
                    Contained Metal (x 1000)  
  Category Tonnes Cu Zn Pb Au Ag S Mo Cu
tonnes
Zn Pb Au   Ag Mo Inmet's
    (x 1000) % % % g/t g/t % % tonnes tonnes ounces   ounces tonnes Interest
Las Cruces Measured - - - - - - - - - - - -   - - 100%
(Secondary) Indicated - - - - - - - - - - - -   - - 100%
  Total - - - - - - - - - - - -   - - 100%
  Inferred 453 5.14 - - - - - - 23 - - -   - - 100%
Las Cruces Measured - - - - - - - - - - - -   - - 100%
(Gossan) Indicated 958 - - 5.81 3.85 109.0 - - - - 56 119   3,356 - 100%
  Total 958     5.81 3.85 109.0 - - - - 56 119   3,356 - 100%
  Inferred 1,834 - - 1.88 2.32 40.0 - - - - 35 137   2,383 - 100%
Las Cruces Measured - - - - - - - - - - - -   - - 100%
(Primary) Indicated - - - - - - - - - - - -   - - 100%
  Total - - - - - - - - - - - -   - - 100%
  Inferred 38,231 1.05 2.61 1.29 - 27.2 - - 401 999 495 -   33,396 - 100%
Çayeli Measured 4,460 2.67 1.74 - 0.34 10.0 - - 119 78 - 48   1,362 - 100%
  Indicated 3,230 2.67 2.42 - 0.56 18.0 - - 86 78 - 58   1,869 - 100%
  Total 7,690 2.67 2.03 - 0.43 13.4 - - 205 156 - 106   3,231 - 100%
  Inferred 760 2.67 6.83 - - - - - 20 52 - -   - - 100%
Pyhäsalmi Measured 8,036 0.63 0.51 - - - 43 - 51 41 - -   - - 100%
  Indicated - - - - - - - - - - - -   - - 100%
  Total 8,036 0.63 0.51 - - - 43 - 51 41 - -   - - 100%
  Inferred - - - - - - - - - - - -   - - 100%
          Inmet's share (100%) 256 197 56 225   6,587 - 100%
    (not including inferred resources)                

Notes to mineral reserves and resources table

Mineral reserves and resources are shown on a 100% basis for each property. Mineral resources are exclusive of mineral reserves, except for Cobre Panama.

Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade and contained metal content.

The mineral reserve and resource estimates are prepared in accordance with the CIM Definition Standards On Mineral Resources and Mineral Reserves, adopted by CIM Council on November 14, 2004, and updated November 27, 2010 and the CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines, adopted by CIM Council on November 23, 2003, using geostatistical and/or classical methods, plus economic and mining parameters appropriate to each project. You will find the definitions and guidelines at www.cim.org.

Estimates for all operations are prepared by or under the supervision of a qualified person as defined in National Instrument 43-101 (usually an engineer or geologist).

There are no known environmental, permitting, legal, taxation, political or other relevant issues that would materially affect the estimates of the mineral reserves.

Mineral resources which do not form part of the mineral reserves do not have demonstrated economic viability.

The Qualified Persons identified below have reviewed the technical content of this release.

Cobre Panama

Mineral resources as at August, 2012, were estimated by Robert Sim, P. Geo., of SIM Geological Inc. Mineral reserves as at December 13, 2012 were estimated by William Rose, P.E., of WLR Consulting, Inc., a qualified person under National Instrument 43-101. Both mineral reserves and mineral resources remained unchanged at December 31, 2012.

Reserve estimates are based on the following assumptions:

  • copper price: US $2.25 per pound

  • gold price: US $1,000 per ounce

  • silver price: US $16 per ounce

  • molybdenum price: US $13.50 per pound

  • Mining costs: US $1.66 per tonne of ore mined, US $1.96 per tonne of waste mined and

  • Milling and general and administration cost: US $5.27 - $5.52 per tonne of ore milled (depending on the deposit), average life of mine metallurgical recoveries: 89 percent for copper, 55 percent for gold, 44 percent for silver and 53 percent for molybdenum.

Mineral resources include mineral reserves.

Resource grades are estimated using ordinary kriging with a nominal block size of 25 metres by 25 metres by 15 metres. Resources are limited inside a pit shell defined by a copper price of US $2.60 per pound, $1.75 per tonne mining cost, $7.02 per tonne total site operating cost, and are tabulated at a cut-off grade of 0.15 percent copper.

Las Cruces

Mineral resources as at December 31, 2012, were estimated by Robert Sim, P. Geo., of SIM Geological Inc. Mineral reserve estimates as at December 31, 2012 were prepared under the supervision of Joseph Boaro, P. Eng. (Director, Mining, Inmet Mining).

Reserve estimates are based on the following assumptions:

  • copper price: US $2.75 per pound

  • exchange rate: EUR1.00 = US $1.30

  • open pit cut-off: 1 percent copper

Resource estimates for the gossan material are based on a cut-off grade of 1 gram per tonne gold.

Resource estimates for the primary sulphide material are based on a cut-off grade of 1% copper equivalent (CuEq) based upon the following formula:

CuEq = [Cu% + (Zn% x 0.360) + (Pb% x 0.360) + (Ag gpt x 0.0106)]

Çayeli

Mineral resources as at December 31, 2012, were estimated by Robert Sim, P. Geo., of SIM Geological Inc. Mineral reserve estimates as at December 31, 2012 were prepared under the supervision of Joseph Boaro, P. Eng. (Director, Mining, Inmet Mining).

Reserve estimates are based on the following assumptions:

  • copper price: US $2.75 per pound

  • zinc price: US $1.00 per pound

  • net smelter return cut-off: US $65 per tonne.

Resource estimates include only material in addition to those used to generate reserves and are based on the same metal prices and a lower net smelter return cut-off: US $59 per tonne.

Pyhäsalmi

Mineral reserve and resource estimates as at December 31, 2012 prepared under the supervision of Timo Maki, EurGeol., European Federation of Geologists (Chief Geologist, Pyhäsalmi).

Mineral reserve estimates are based on the following assumptions:

  • copper price: US $2.75 per pound

  • zinc price: US $1.00 per pound

  • exchange rate: EUR1.00 = US $1.30

  • net smelter return cut-off: EUR31.81 per tonne.

Resource estimates are based on the geological limits of the massive sulphides.

Forward looking information

Securities regulators encourage companies to disclose forward-looking information to help investors understand a company's future prospects. This press release contains forward-looking information. These are "forward-looking" because we have used what we know and expect today to make a statement about the future. Forward-looking statements usually include words such as may, expect, anticipate, and believe or other similar words. Capital and operating cost estimates are forward-looking statements, and are based on assumptions that we believe to be reasonable. However, actual events and results could be substantially different because of the risks and uncertainties associated with our respective business or events that happen after the date of this press release. You should not place undue reliance on forward-looking statements.

About Inmet

Inmet is a Canadian-based global mining company that produces copper and zinc. We have three mining operations: Çayeli (Turkey), Las Cruces (Spain) and Pyhäsalmi (Finland), and own 80% of the Cobre Panama development project, currently in construction.

This press release is also available at www.inmetmining.com.



Inmet Shareholder Contact:
Inmet Mining Corporation
Flora Wood
Director, Investor Relations
+1 416 361 4808
or
Inmet Mining Corporation
Scott Herr
Vice President, Mining
+1 416 860 3983
www.inmetmining.com
or
Laurel Hill Advisory Group
North American Toll Free: +1 877 452 7184
Banks and Brokers and collect calls outside North America:
+1 416 304 0211
assistance@laurelhill.com
or
Inmet Media Contact:
Longview Communications Inc.
David Ryan
+1 416 649 8007
dryan@longviewcomms.ca
Data and Statistics for these countries : Finland | Panama | Spain | Turkey | All
Gold and Silver Prices for these countries : Finland | Panama | Spain | Turkey | All
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TORONTO (IMN.TO)
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24hGold TrendPower© : -5
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