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OVERVIEW

Bear Creek's flagship Corani Property, situated in an emerging mineral district of southeastern Peru, is both an advanced bulk-tonnage project positioned for pre-feasibility and metallurgical studies and an exploration project with excellent potential for new silver-rich discoveries. The project consists of three adjacent open-pittable deposits - Main Corani, Minas Corani and Corani Este - that collectively host measured and indicated resources containing 327 million ounces of silver, 3.97 billion pounds of lead and 2.46 billion pounds of zinc, with another 35 million ounces of silver in the inferred category.

Bear Creek acquired Corani as a grassroots prospect in early 2005, and reported its first resource estimate in March of 2006, just nine months after collaring the first drill hole. Main Corani, the original discovery outcrop, was intensely drilled in the early stages of exploration, but the focus soon shifted to Corani Este and Minas Corani because of their higher grades. A second estimate increased resources by 27% in July of 2006, and in late 2007 Bear Creek updated its resources for the forth time that year based on assay results from 487 drill holes and 25 surface trenches. This work established Corani as a world-class silver project with robust base-metal credits and strong silver mineralization in the high-grade cores of all three deposits.

Bear Creek continues to advance Corani through ongoing exploration programs, which by mid-April, 2007, brought drilling on the project to 76,625 metres in 455 holes. Drilling is focused on expanding known mineralization and testing priority targets under thin cover. Multi-disciplinary studies are providing the necessary elements for a pre-feasibility study, including advanced metallurgical test-work to design the optimum processing flow-sheet, maximize recoveries of silver and other metals, and ensure the production of quality concentrates.

Bear Creek's discovery costs at Corani average US$0.04 per ounce of silver, including option payments but excluding base metals, with less than 20% of the 56-square-kilometre project explored to date. This achievement reflects the success of the Company's generative strategy focused on discovering world-class deposits in under-explored regions through advanced exploration techniques and geological concepts.

LOCATION AND PROPERTY STATUS

The Corani Project is situated midway between the cities of Cusco and Puno in the Department of Puno, and is easily accessible by road from the Cusco or Juliaca airports, both served by commercial airlines.

Corani lies within an emerging mineral district and shares geological and mineralogical similarities with other economic silver-rich deposits in nearby regions. Because the high-altitude district is poorly suited for agriculture, local residents have historically supported mining activities and the development of mine-related infrastructure.

On January 15th 2008, Bear Creek announced that the final payment of US$3 million, had been made to Rio Tinto Mining and Exploration Ltd. ("Rio Tinto") resulting in Bear Creek owning 70% of the Corani silver and base-metals deposit. According to the terms of the final Option and Shareholders Agreement (the "Agreement") dated March 15th, 2007 upon Bear Creek earning its 70% interest, the parties entered into a joint venture agreement, with Rio Tinto having a 30% interest.

However, on March 7th 2008, Bear Creek announced that it had entered into an agreement (the "Purchase Agreement") with its Joint Venture partner Rio Tinto Mining and Exploration Ltd. ("Rio Tinto") to purchase Rio Tinto's remaining 30% interest in the Corani silver and base-metals deposit and extinguish all of Bear Creek's future payment obligations, royalties and Rio Tinto's back-in rights under the existing option agreement. Upon completion of the purchase, Bear Creek will own a 100% interest in the deposit, which contains 327 million ounces of silver in measured and indicated resources (248.2M tonnes @ 40.9 g/t Ag).

Bear Creek has agreed to pay Rio Tinto total consideration of US$75 million payable as follows: (i) US$30 million by issue of 3,871,000 Bear Creek common shares at a price of US$7.75 per share (representing approximately 7.5% of Bear Creek post-transaction); (ii) US$20 million in cash payable on the earlier of: December 31, 2008 or 15 business days following a change of control of Bear Creek; and (iii) US$25 million in cash payable on the earlier of: December 31, 2009 or 180 days following a change of control of Bear Creek.

Under the terms of the Purchase Agreement, should Rio Tinto wish to dispose of its Bear Creek shares, the Company has certain rights to arrange for purchasers to acquire their shares. In addition, Rio Tinto has agreed, subject to certain limitations, to vote its shares in Bear Creek in favour of matters proposed by management of Bear Creek until the earlier of 12 months from the closing date or change of control of Bear Creek or the disposition by Bear Creek of more than 50% of the Corani or Santa Ana deposits.

The closing of the acquisition of the Rio Tinto interest under the Purchase Agreement is subject to, among other things, all necessary regulatory and stock exchange approvals and the absence of material adverse changes in the affairs of Bear Creek. The balance of the purchase price is to be secured by a General Security Agreement in favour of Rio Tinto in addition to a mortgage on the Corani property, subordinated to project financing.


GEOLOGY AND MINERALIZATION

The emerging Corani District lies within a regional-scale volcanic belt hosting many other deposits in southeastern Peru, and is considered prospective for low-sulphidation epithermal systems. In addition to silver-rich mineralization typically hosted in veins, breccias and stockworks, the Corani Property hosts several gold and antimony zones.
These combined features are indicative of the type of epithermal mineralization often associated with distal zoning around a porphyritic intrusion, suggesting potential for large-scale porphyry deposits.

Silver at Corani occurs mostly in silver-rich tetrahedrite. Sphalerite is the only source of zinc mineralization, while lead is found primarily in galena, and to a lesser degree as a lead phosphate. These sulphide minerals all respond well to conventional flotation recovery methods.

EXPLORATION AND RESOURCE DEVELOPMENT

Bear Creek was attracted to the Corani Property by the presence of gold-silver anomalies within a large area of intense alteration that together suggested potential for bulk-tonnage precious-metals deposits. A successful early-stage exploration program in early 2005 was followed by a first-phase drilling program in June of that year. Nine months later, Bear Creek released its first resource estimate of 250 million ounces of silver within three adjacent open-pittable deposits, with Corani Este alone hosting half the total resource (in all categories).

By July of 2006, total resources had increased 27% to 257 million ounces of silver, 2.8 billion pounds of lead and 1.58 billion pounds of zinc in the measured and indicated categories, with another 60 million ounces of silver in the inferred category. At this stage, drilling had also confirmed the presence of high-grade cores in all three deposits.

At year-end 2006, Bear Creek updated its resource estimate for the third time that year, which include resources for the high-grade cores, which lie within a computer-generated pit-shape that could be mined at a waste-to-ore stripping ratio of 1.85:1 or less. These cores provide potential for faster payback of capital and improved project economics.

SCOPING STUDY AND PRELIMINARY ECONOMIC ASSESSMENT

The PEA is based upon mining assumptions derived from mine planning sequences completed by IMC and metallurgical test work performed by SGS Laboratories, G&T Metallurgical, and Dawson Metallurgical. The mining sequence primarily derives ore from the higher-grade starter pits (see Resource Estimate section below) in Years 1-6 and increases production from the global resource in later years. Mine-life will likely extend well beyond the 12.5 year depending on ongoing metallurgical test work and future silver prices. All resource categories were used, including Inferred resources. Note that in the mine sequence, only 131.5M tonnes of the 248.4M contained in the global resource tonnes are mined.

Key Assumptions for the Corani Project – Base Case

Item

 

Annual ore production – years 1 to end of life (tonnes)

10,500,000

Overall Process Recovery – Silver

80%

Overall Process Recovery – Lead – Into Lead and Bulk Cons

58%

Overall Process Recovery – Zinc – Into Zinc and Bulk Cons

61%

Total Processed Tonnes

131,460,000

Average Silver Grade (g/t)

60.6 g/t

Average Lead Grade (%)

0.99%

Average Zinc Grade (%)

0.56%

Recovered ounces of silver (total)

204.7 million

Recovered pounds of lead (total)

1.66 billion

Recovered pounds of zinc (total)

995 million

Overall stripping ratio

1.56 to 1

Life of mine (mining only) years

11.5

Life of mine (processing) years

12.5



Resource prices determined in the resource model of November '07 utilizing three-year backward and two-year forward metals prices weighted 60:40 were maintained for the PEA base case. Using January 14 metals prices, Bear Creek's 70% interest in Corani has an NPV of $878M and a 59.5% IRR.

The scoping study determines that the project has a number of favorable characteristics:
  • Positive economics with excellent exposure to up-side silver and base metals prices
  • Well-defined resources open to expansion and convertible to reserves
  • Over 106M oz silver at lower grades in the current resource not considered in the current production schedule
  • Favorable infrastructure; power and access
  • Available local water supply
  • Well-defined permitting path
  • Local population acceptance

Note: in accordance with NI43-101, mineral resources that are not mineral reserves do not have demonstrated economic viability. The preliminary assessment includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves, and there is no certainty that the preliminary assessment will be realized.

RESOURCE ESTIMATE

The Scoping Study/PEA is based upon an updated resource estimation and mine sequencing performed in Dec '07 by IMC based upon 86,299 meters of drilling in 487 diamond drill holes completed through Nov. '07. Previous resource estimates used a silver cut-off value to establish the lower limit of the resource. The company now employs a Net Smelter Return (NSR) method to determine the break between ore and waste. For the global resource, metal prices in the assumptions noted below were employed. To determine the final pit limits for the production schedule used in the Scoping Study metal prices of $8.50 per ounce for silver, $0.50 per pound for lead and $0.75 per pound for zinc were used. This results in a production plan that generates higher grades and less tonnes than the global resource. Therefore, the sequencing assumptions used in the PEA are felt to be conservative and significant silver, lead, and zinc contained in the global resource represent up-side potential as process recoveries are improved and/or metals prices continue to strengthen. The following assumptions were used in the global resource estimates:
  • Mining Cost (Ore and Waste) - $1.25 per tonne
  • Processing Costs - $8.50 per tonne
  • General and Administration costs $0.85 per process tonne
  • Silver Recovery: 80%
  • Lead Recovery 60%
  • Zinc Recovery 60%
  • Resource prices
    • Price $12 per ounce
    • Lead Price $0.93 per pound
    • Zinc Price $1.19 per pound
  • Other parameters including transportation and refining charges were based on IMC's database of equivalent projects. The current resource estimates are:

Bear Creek Mining, Corani Project Silver Zone
Mineral Resource Based on $9.35/tonne NSR cut-off and Prudent Open Pit Constraints
November 16, 2007

 

 

 

Contained Metal

Deposit

Category

Ktonnes

Silver

Lead

Zinc

Silver

Lead

Zinc

 

 

 

Gm/t

%

%

Million Ozs

Million Lbs

Million Lbs

 

 

 

 

 

 

 

 

 

Main

Measured

10,025

42.3

0.80

0.37

13.6

176.8

81.8

 

Indicated

64,250

30.0

0.57

0.43

62.0

807.4

609.1

 

Meas+ Ind

74,275

31.7

0.60

0.42

75.6

984.2

690.9

 

 

 

 

 

 

 

 

 

 

Inferred

11,928

33.1

0.57

0.36

12.7

149.9

94.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minas

Measured

6,168

53.4

1.05

0.44

10.6

142.8

59.8

 

Indicated

106,970

38.2

0.75

0.38

131.4

1,768.7

896.1

 

Meas+ Ind

113,138

39.0

0.77

0.38

142.0

1,911.5

955.9

 

 

 

 

 

 

 

 

 

 

Inferred

19,698

32.5

0.54

0.39

20.6

234.5

169.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Este

Measured

20,523

63.3

0.91

0.69

41.8

411.7

312.2

 

Indicated

40,485

52.0

0.75

0.57

67.7

669.4

508.7

 

Meas+ Ind

61,008

55.8

0.80

0.61

109.5

1,081.1

820.9

 

 

 

 

 

 

 

 

 

 

Inferred

1,526

30.4

0.41

0.21

1.5

13.8

7.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total

Measured

36,716

55.9

0.90

0.56

66.0

731.3

453.8

All

Indicated

211,705

38.4

0.70

0.43

261.1

3,245.5

2,013.9

Deposits

Meas+ Ind

248,421

40.9

0.73

0.45

327.1

3,976.8

2,467.7

 

 

 

 

 

 

 

 

 

 

Inferred

33,152

32.6

0.54

0.37

34.8

398.2

271.2

 

 

 

 

 

 

 

 

 


Higher-grade cores- Similarly to previous resource estimates, the Corani resource continues to have minable high grade cores. In the current resource estimate 54% of the silver, 49% of the lead and 38% of the zinc contained within the Measured and Indicated categories are found in the high grade core that represents 29% of the Measured and Indicated tonnes. Importantly, 98% of the higher-grade resource silver ounces are contained in Measured and Indicated resources.

Bear Creek Mining, Corani Project Silver Zone
High Grade Core Contained in Smaller Open Pit Shapes
NSR Cut-off grade $19.60/tonne
16 November 2007

 

 

 

Contained Metal

Deposit

Category

Ktonnes

Silver

Lead

Zinc

Silver

Lead

Zinc

 

 

 

Gm/t

%

%

Million Oz

Million Lb

Million Lb

 

 

 

 

 

 

 

 

 

Main

Measured

3,877

77.9

1.34

0.26

9.7

114.5

22.2

 

Indicated

11,389

67.0

1.03

0.38

24.5

258.6

95.4

 

Meas+ Ind

15,266

69.8

1.11

0.35

34.2

373.1

117.6

 

 

 

 

 

 

 

 

 

 

Inferred

1,071

65.1

0.79

0.50

2.2

18.7

11.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minas

Measured

3,027

77.5

1.53

0.50

7.5

102.1

33.4

 

Indicated

26,642

66.1

1.34

0.41

56.6

787.1

240.8

 

Meas+ Ind

29,669

67.3

1.36

0.42

64.1

889.2

274.2

 

 

 

 

 

 

 

 

 

 

Inferred

795

63.5

0.97

0.35

1.6

17.0

6.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Este

Measured

11,122

93.8

1.23

0.97

33.5

301.6

237.8

 

Indicated

16,057

88.5

1.14

0.85

45.7

403.6

300.9

 

Meas+ Ind

27,179

90.7

1.18

0.90

79.2

705.2

538.7

 

 

 

 

 

 

 

 

 

 

Inferred

39

66.6

0.60

0.24

0.1

0.5

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total

Measured

18,026

87.6

1.30

0.74

50.7

518.2

293.4

All

Indicated

54,088

72.9

1.22

0.53

126.8

1,449.3

637.1

Deposits

Meas+ Ind

72,114

76.6

1.24

0.59

177.5

1,967.5

930.5

 

 

 

 

 

 

 

 

 

 

Inferred

1,905

64.5

0.86

0.43

3.9

36.2

18.1

 

 

 

 

 

 

 

 

 


Higher-grade zinc cores- the higher-grade zinc occurs in discrete pods. The current resource estimate shows that in the measured and indicated categories 43% of the zinc occurs in 10% of the tonnes. The zinc extraction has been designed in the mine sequencing in order to optimize zinc recoveries from the higher-grade pods where recoveries are markedly greater.

Bear Creek Mining, Corani Project
High Grade Zinc Areas at 1% Zinc cut-off of Global Resource
16 November 2007

 

 

Zn

Pb

Ag

Contained

 

Ktonnes

%

%

gm/t

M Lbs Zn

Measured

5,800

2.19

1.42

81.2

280.0

Indicated

19,709

1.79

0.99

45.5

777.8

Total M&I

25,509

1.88

1.09

53.6

1,057.8

 

 

 

 

 

 

Inferred

2,994

1.61

0.52

24.8

106.3



METALLURGICAL AND ENGINEERING STUDIES

Over 300 flotation and leach tests have been performed on material specifically chosen form the deposit to reflect the different grades and rock types seen at Corani. These tests have shown that over 95% of the deposit is amenable to conventional flotation and/or leach recovery methods. For processing the ore the following process scheme is envisioned and is illustrated in a simplified flow below:
  • Primary Crushing
  • Primary Grinding -- to approximately K80 80µm
  • Flash flotation of the primary grind cyclone underflow
  • Lead-Silver rougher flotation followed by regrind and cleaner flotation
  • Zinc rougher flotation followed by regrind and cleaner flotation
  • Bulk scavenger flotation of lead-silver and zinc flotation tailings to recover additional metal values
  • Regrinding of the concentrates will be to a K80 of approximately 20µm
  • Cyanide leaching will be employed for the treatment of the western ores from the Minas and Main zones. For the scoping study has been assumed that 25% of the total ore tonnes will be treated by leaching.
  • Cyanide leaching of the cleaner flotation tailings may be included to improve overall recovery in the flotation plant on selected tailings streams.
  • Overall recovery
    • Silver 80%
    • Lead 60%
    • Zinc 60%



The results of ongoing metallurgical studies have provided an important component for the project scoping study, which has already satisfactorily addressed other aspects of a proposed mine, including power, access, transportation, water, community relations and infrastructure. The Corani Project is advancing to the pre-feasibility stage, which will include environmental and socio-economic studies and programs.

Corani has been transformed from a grassroots prospect into one of the most important undeveloped silver deposits in the world within several years, yet still has excellent potential for resource expansion and new discoveries through ongoing exploration and development programs.


MAPS AND SECTIONS
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:Show image 'Corani Silver-Lead-Zinc Resource Map January 15th, 2008' in New Window:
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Corani Silver-Lead-Zinc Resource Map January 15th, 2008
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:Show image 'Corani Silver Zone Drill Hole Map June 28th, 2007' in New Window:
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Corani Silver Zone Drill Hole Map June 28th, 2007
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:Show image 'Corani District Exploration Potential Map January 17, 2008' in New Window:
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Corani District Exploration Potential Map January 17, 2008
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:Show image 'Corani Drill Hole Map with New Resource - December 5, 2006' in New Window:
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Corani Drill Hole Map with New Resource - December 5, 2006
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:Show image 'Corani C-C Cross Section January 15, 2008' in New Window:
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Corani C-C Cross Section January 15, 2008
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:Show image 'Corani Este photo with Resource Block - June 15th, 2006' in New Window:
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Corani Este photo with Resource Block - June 15th, 2006
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:Show image 'Corani District Map January 15th, 2008' in New Window:
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Corani District Map January 15th, 2008
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:Show image 'Looking east over gold target showing strong associated alteration and example of mineralized structural zone' in New Window:
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Looking east over gold target showing strong associated alteration and example of mineralized structural zone
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Drilling and Trenching Results

  • Corani Silver-Lead-Zinc Resource Map January 15th, 2008.
  • Locations of drill holes being added to resource model, Oct '07
  • Corani Drill Results, October 3, 2007
  • Corani Silver Zone Drill Hole Map June 28th, 2007
  • Corani Drilling Summary, March 22, 2007: Excel Format
  • Corani District Exploration Potential Map January 17th, 2008
  • Corani Drill Hole Map with New Resource - December 5, 2006
  • Corani District Map January 15th, 2008.
  • Corani Gold Zone Map, Apr 19, 2006
  • Compiled Announced Drill Results, Apr 19, 2006: Excel Format
  • Corani Reported Intervals Weighted Averages, Feb 20, 2006
  • Corani C-C Cross Section January 15th, 2008
  • Corani Este photo with Resource Block - June 15th, 2006
  • Corani Drill Analysis Results - Dec 5, 2005
  • Corani Project Mineral Resource Technical Report by IMC -- October 4th, 2006
  • Corani Trench Map, Sep 12, 2005
  • Corani Grade/Thickness Contour Map, Sep 12, 2005
  • Corani Drill Hole Cross Section A-A Map, Sep 12, 2005
  • Corani Drill Hole Cross Section B-B Map, Sep 12,2005
  • Corani T-4 Cross Section Map, Sep 12, 2005
  • Corani Geophysical Map, Sep 12, 2005
  • Corani IP Response Map, Sep 12, 2005
  • Corani Trenches 18 - 22, Sep. 12, 2005