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China
Jiama Mine

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 Location:
16 km S from Maizhokunggar, China

  Regional Office:
No.9 Andingmenwai Road Dongcheng Distric
Beijing
China
100011
Phone  ...  Subscription required
Fax+86-10-56353627
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Copper
  • Gold
  • Silver
  • Molybdenum
  • Lead
  • Zinc
Mining Method
  • Truck & Shovel / Loader
  • Cut & Fill
  • Sub-level caving
Production Start...
Mine Life30 years (as of Jan 1, 2019)
The Jiama project is one of the largest copper gold polymetallic mines in China.


Owners

Source: p. 7
CompanyInterestOwnership
China Gold International Resources Corp. 100 % Indirect
Tibet Huatailong Mining Development Co. Ltd. (operator) 100 % Direct
Jiama Copper-Polymetallic Mine is owned and operated by Tibet Huatailong Mining Development Co. Ltd., a wholly-owned subsidiary of China Gold International Resources Corp. Ltd.

Contractors

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Deposit Type

  • Porphyry
  • Skarn


Summary:

The Jiama deposit is a structurally controlled stratiform skarn-type copper-polymetallic system. The majority of high grade mineralisation is associated with shear zone contacts between the Duodigou and Linbuzong formations and shear related folding. The zone of mineralisation within fault hosted skarn alteration measures kilometres in both strike and dip and remains open at depth to the northeast.

Mineralisation is also associated with granite porphyry dykes intruding the ‘Duodigou Marble’ and observed within the overlying hornfels of the Linbuzong Formation.

Although both deposit types are of lower grade than that of the skarn, the hornfels style of mineralisation may potentially be of further economic value in the future.

Three types of copper-polymetallic mineralisation are recognised in the project area, these include skarn, hornfels and porphyry hosted deposits.

High grade copper-polymetallic mineralisation is associated with skarn type alteration within shear zone contacts between the Duodigou and Linbuzong formations. This stratiform fault zone is tabular to lenticular in shape, has a variable dip, strikes west-northwest and hosts the primary lode.

The mineralised body itself has a 60° near surface dip angle which flattens to an average dip of 10° with depth. Thicknesses vary between 2 m to 240 m, averaging 33 m, its strike length is approximately 2,400 m and its length down dip ranges between 150 to 1,900 m. It ........


Mining Methods

  • Truck & Shovel / Loader
  • Cut & Fill
  • Sub-level caving


Summary:

Conventional mining methods have been proposed for the open pit and underground operations.

China Gold currently mine the Jiama deposit as an open pit and underground mine and intend to continue and expand both operations. The Jiama underground workings are currently accessed via declines and adits, with future plans to include a conveyor drive for ore haulage, vertical shaft for waste haulage and decline expansion for improved access. The current mining activity is limited to hand-held air leg mining for both development and stoping.

Conventional selective mining methods using truck and shovel are planned to be employed to extract the mineralised material from the proposed open pits. Mining is planned to occur on shallow flitches, typically 3m to 4m high, which will enable better grade control of the mineralised zones.

The open pits are the Jiaoyan and South Pit. The Jiaoyan pit will be mined in two stages and South pit four stages.

Mining of Phase II will commence in two open pits and an extensive underground mine including; Jiaoyan Pit, South Pit and the underground mine respectively. The open pits and underground expansion will be developed simultaneously. The Open pits will be separated from the underground operation by a crown pillar that will be maintained between the base of South Pit and the upper Underground Mine. Stope voids will be progressively backfilled beneath the base of the pit floor to reduce the potential for o ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Copper M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required1217940
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Molybdenum lbs  ......  Subscription required  ......  Subscription required
Lead lbs  ......  Subscription required  ......  Subscription required
Zinc lbs  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Tonnes processed  ......  Subscription required  ......  Subscription required12,348,777 t10,431,401 t
Daily processing capacity  ......  Subscription required  ......  Subscription required50,000 t28,000 t6,000 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,364,892 t2,132,483 t
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Reserves at December 31, 2021:
Mineral Resourses reported at a 0.3% Cu Equivalent Cut off grade.
The cut-off grade for Mineral Reserves has been estimated at copper equivalent grades of 0.3% Cu (NSR) for the open pits and 0.45% Cu (NSR) for the underground mine.

CategoryTonnage CommodityGradeContained Metal
Proven 18.48 Mt Copper 0.6 % 110.5 kt
Proven 18.48 Mt Gold 0.19 g/t 0.114 M oz
Proven 18.48 Mt Silver 7.67 g/t 4.559 M oz
Proven 18.48 Mt Molybdenum 0.05 % 9.1 kt
Proven 18.48 Mt Lead 0.02 % 4 kt
Proven 18.48 Mt Zinc 0.01 % 2.7 kt
Probable 356.44 Mt Copper 0.6 % 2,127 kt
Probable 356.44 Mt Gold 0.16 g/t 1.844 M oz
Probable 356.44 Mt Silver 10.25 g/t 117.524 M oz
Probable 356.44 Mt Molybdenum 0.03 % 121.1 kt
Probable 356.44 Mt Lead 0.12 % 427.7 kt
Probable 356.44 Mt Zinc 0.07 % 236.2 kt
Proven & Probable 374.92 Mt Copper 0.6 % 2,238 kt
Proven & Probable 374.92 Mt Gold 0.16 g/t 1.958 M oz
Proven & Probable 374.92 Mt Silver 10.13 g/t 122.083 M oz
Proven & Probable 374.92 Mt Molybdenum 0.03 % 130.3 kt
Proven & Probable 374.92 Mt Lead 0.12 % 431.7 kt
Proven & Probable 374.92 Mt Zinc 0.06 % 238.9 kt
Measured 92.99 Mt Copper 0.38 % 356.9 kt
Measured 92.99 Mt Gold 0.07 g/t 0.224 M oz
Measured 92.99 Mt Silver 5.1 g/t 15.236 M oz
Measured 92.99 Mt Molybdenum 0.04 % 34 kt
Measured 92.99 Mt Lead 0.04 % 33.5 kt
Measured 92.99 Mt Zinc 0.02 % 16.8 kt
Indicated 1,330 Mt Copper 0.4 % 5,307 kt
Indicated 1,330 Mt Gold 0.1 g/t 4.315 M oz
Indicated 1,330 Mt Silver 5.53 g/t 236.515 M oz
Indicated 1,330 Mt Molybdenum 0.03 % 456 kt
Indicated 1,330 Mt Lead 0.05 % 613.1 kt
Indicated 1,330 Mt Zinc 0.03 % 380 kt
Measured & Indicated 1,423 Mt Copper 0.4 % 5,664 kt
Measured & Indicated 1,423 Mt Gold 0.1 g/t 4.539 M oz
Measured & Indicated 1,423 Mt Silver 5.5 g/t 251.752 M oz
Measured & Indicated 1,423 Mt Molybdenum 0.03 % 489 kt
Measured & Indicated 1,423 Mt Lead 0.05 % 646.6 kt
Measured & Indicated 1,423 Mt Zinc 0.03 % 396.8 kt
Inferred 406.1 Mt Copper 0.31 % 1,247 kt
Inferred 406.1 Mt Gold 0.1 g/t 1.317 M oz
Inferred 406.1 Mt Silver 5.13 g/t 66.926 M oz
Inferred 406.1 Mt Molybdenum 0.03 % 123 kt
Inferred 406.1 Mt Lead 0.08 % 311 kt
Inferred 406.1 Mt Zinc 0.04 % 175 kt

Commodity Production Costs:

CommodityUnits202120202019201820172016
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.89 / lb   -1.11 / lb   -1.01 / lb  
Cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.25 / lb   2.05 / lb   2.09 / lb  
Cash costs Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.36 / lb†   0.94 / lb†   1.09 / lb†  
Total cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2.97 / lb   2.47 / lb   2.49 / lb  
Total cash costs Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 2.08 / lb†   1.36 / lb†   1.48 / lb†  
† Net of By-Product.
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Financials:

Units202120202019201820172016
Capital expenditures M USD 137.7   207   143.7  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 383.8   178.2   111  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 34.9   50.5  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 8   64.9  
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Proposed Heavy Mobile Equipment as of January 31, 2014:
HME TypeSizeQuantity
Backhoe 5 cu. m ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Press Release 2018
Annual Report 2017
Annual Report 2016
Annual Report 2015
Technical Report 2014
Pre-Feasibility Study Report 2012
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