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Peru
Coricancha Mine

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 Location:
4 km S from San Mateo, Peru

  Regional Office:
Cal. Coronel Inclan No. 211, Ofic. 509
Lima
Peru
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WebsiteWeb
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  • Mining
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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Backfill
Production Start...
Mine Life3.75 years (as of Jan 1, 2018)
Coricancha has been on care and maintenance since August 2013 and the Company continues to evaluate options for this asset.


Owners

Source: p. 81
CompanyInterestOwnership
Great Panther Mining Ltd. 100 % Indirect
Great Panther Coricancha SA. (operator) 100 % Direct

Contractors

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Deposit Type

  • Vein / narrow vein
  • Hydrothermal


Summary:

The CMC is a polymetallic hydrothermal, brittle low sulphidation deposit hosted in the andesitic rocks of the Rímac Formation. The veins exhibit pinch-swell type behavior typical of hydrothermal systems found within compressional and extensional structural environments. Vein widths reach upwards of 2.0 m and with a mean width of 0.6 m. The veins are known to split into two or more branches separated by waste rock materials.

The CMC property is almost entirely underlain by the Rímac Formation andesitic volcanic rocks. The base of the sequence is composed of brecciated volcanic rocks overlain by andesitic flows, agglomerate and tuff towards the top of the Cerro Huamanjune at approximately 4,500 masl elevation.

Mineralization at CMC is that of an anastomosed system where most of the secondary and tertiary veins branch off either from the main vein or the secondary veins. This has produced the necessary conduits to be filled by mineralized hydrothermal fluids. The overall system trends towards the NE at approximately 15°, and the veins are primarily sub-vertical to steeply NW dipping. It is thought that the anastomosed vein system is part of a larger tectonic shear zone with associated secondary and tertiary tensional veins.

The three main veins on the CMC property include the Wellington, Constancia and Animas veins. These veins define three structurally dislocated blocks from which a series of secondary and tertiary tensional veins splits off. ........


Mining Methods

  • Cut & Fill
  • Backfill


Summary:

With all of this previous activity, CMC has established mine access portals, level development, raises and underground infrastructure that, in most cases, can be utilized for future operations. The proposed CMC restart considers utilizing existing mine infrastructure, access portals, rail transfer levels, ramps, and ancillary mine systems to produce approximately 550 tpd (198,000 tonnes per year) from underground mining. Multiple veins will be mined at the same time and sequenced to maximize value. A ramp-up period will be needed since existing access levels can be rehabilitated to allow for stope development.

Due to the geometry of the mineralized zones, highly selective mining methods must be used for all veins at CMC. Two mining methods are proposed, both as variants of the overhand cut-and-fill (CAF) mining methods. In cases where the vein width is narrower than 0.50 m, resue mining will be used. Resue mining involves selectively blasting and removing mineralized material, prior to blasting waste, to make-up the total minimum mining width of 0.90 m. This mining process is slower and more labor intensive than traditional overhand CAF, but it reduces the amount of waste rock that is shipped to the process plant.

In cases where the vein width is greater than 0.50 m, traditional overhand CAF mining will be used with waste rock as the backfill. In both cases, production stope dimensions are 50 m high by 60 m along strike. These two methods have been histo ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits20142013Avg. Annual (Projected)LOM (Projected)
Zinc Payable metal M lbs 24
Lead Payable metal M lbs  ......  Subscription required
Copper Payable metal M lbs  ......  Subscription required
Silver Metal in zinc concentrate koz  ......  Subscription required
Silver Metal in doré koz  ......  Subscription required
Silver Metal in lead concentrate koz  ......  Subscription required
Silver Metal in copper conc. koz  ......  Subscription required
Silver Payable metal koz  ......  Subscription required
Gold Metal in zinc concentrate koz  ......  Subscription required
Gold Metal in copper conc. koz  ......  Subscription required
Gold Metal in lead concentrate koz  ......  Subscription required
Gold Metal in doré koz  ......  Subscription required
Gold Payable metal koz  ......  Subscription required
Silver Equivalent Metal koz  ......  Subscription required  ......  Subscription required
Gold Equivalent Metal koz  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt 10
Lead Concentrate kt  ......  Subscription required
Copper Concentrate kt  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate M lbs 2.2
Lead Metal in concentrate M lbs  ......  Subscription required
Copper Metal in concentrate M lbs  ......  Subscription required

Operational Metrics:

Metrics20142013
Tonnes milled 2 kt51 kt

Reserves at December 31, 2017:
Cut-offs are based on an estimated $140 Net Smelter Return (NSR)/tonne.

CategoryTonnage CommodityGradeContained Metal
Measured & Indicated 752,759 t Zinc 3.26 %
Measured & Indicated 752,759 t Lead 2.06 %
Measured & Indicated 752,759 t Copper 0.53 %
Measured & Indicated 752,759 t Silver 200 g/t
Measured & Indicated 752,759 t Gold 5.8 g/t
Measured & Indicated 752,759 t Silver Equivalent 999 g/t 24.2 M oz
Inferred 943,160 t Zinc 3.25 %
Inferred 943,160 t Lead 1.45 %
Inferred 943,160 t Copper 0.64 %
Inferred 943,160 t Silver 209 g/t
Inferred 943,160 t Gold 5 g/t
Inferred 943,160 t Silver Equivalent 934 g/t 28.36 M oz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 2, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Preliminary Economic Assessment 2018
Press Release 2018
Press Release 2017
Annual Report 2014
Year-end Mineral Reserves 2012
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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