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Dominican Republic
Cerro De Maimon Mine

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 Location:
5 km SE from Maimon, Dominican Republic

  Address:
El Copey-Los Martínez Highway, Km 3
Maimón
Dominican Republic
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Copper
  • Gold
  • Silver
  • Zinc
Processing
  • Dewatering
  • Filter press plant
  • Flotation
Mine Life2037
The Cerro de Maimón North (“CDMN”) deposit on the Cerro de Maimón Exploitation Concession has been in production as an open pit since September 2008. Mining of the CDMN open pit was completed in 2020, with the open pit void to be utilised as a tailings facility. Mining of the CDMN underground mine commenced in 2020 and will provide continuous production as the Cerro de Maimón South (“CDMS”) comes on track. The Dominican Republic Operations underground will be extended from North to South.


Owners

Source: p. 7
CompanyInterestOwnership
Shenzhen Zhongjin Lingnan Nonfemet Co.,Ltd. 100 % Indirect
Perilya is owned by Zhongjin Lingnan Mining (HK) Company Limited of Hong Kong. It bought the remaining 48% of the shares that it did not already own in December 2013, and de-listed Perilya from the Australian Stock Exchange. Zhongjin Lingnan is a wholly owned subsidiary of Shenzhen Zhongjin Lingnan Nonfemet Co., Limited, China, which is 39.23% owned by the Government of the People’s Republic of China, and is listed on the Shenzhen stock exchange.

Deposit Type

  • VMS


Summary:

Mineralization in the massive sulphide deposit consists of closely packed, rounded to angular grains of pyrite (generally around 200 microns in diameter) with lesser, interstitial chalcopyrite and sphalerite (generally 5 to 50 microns in diameter). The ore mineral assemblage (in order of decreasing abundance) is pyrite, chalcopyrite, chalcocite, bornite, sphalerite, galena, and tetrahedrite. Base metal sulphides are very fine grained. Bornite, tennantite-tetrahedrite, and galena occur in trace amounts as inclusions within pyrite and filling interstices between grains. Gangue minerals include quartz, sericite, chlorite, rare calcite, and barite.

The massive sulphide deposit has been affected by supergene oxidation and copper enrichment. Chalcocite and covellite partially replace chalcopyrite, sphalerite and bornite. Copper grades of the protore, generally between 2% and 3%, are locally enriched to as much as 10%. These zones of enrichment are irregularly distributed within massive sulphide lenses and are observed above, below and within mainly primary massive sulphide lenses.


Mining Methods


Summary:

Mining of the CDMN open pit was completed in 2020, with the open pit void to be utilised as a tailings facility. Mining of the CDMN underground mine commenced in 2020 and will provide continuous production as the Cerro de Maimón South (“CDMS”) comes on track. The DR Operations underground will be extended from North to South.

In 2020 infill and extensional drilling on CDMN continued to provide better definition and higher confidence on ore lenses and provide guidance for effective mine planning. CDMN drilling in the first half of 2021 will be prioritised to define potential life of mine extensions beneath the open pit crown pillar and southerly extensions.


Crushing and Grinding
Crusher / Mill TypeModelSizePowerQuantity
Jaw crusher 1
Cone crusher 1
Ball mill 1

Summary:

The crushing plant includes a jaw crusher, cone crusher and a sizing screen for 8mm product.


Processing

  • Dewatering
  • Filter press plant
  • Flotation

Source: Subscription required

Summary:

The ore is trucked to separate sulfide and oxide ore processing plants. The sulfide plant produces a copper, gold and silver concentrate by flotation, and a zinc flotation circuit was added in 2015 to produce a zinc-silver concentrate also. The 700 tonnes per day oxide plant produced a gold-silver precipitate and was closed in April 2015 on exhaustion of the oxide reserves. The sulfide plant has a design throughput of 1,300 tonnes per day.

The sulphide mill, sized for 1300 t/d throughput, comprises a grinding unit, flotation cells arranged for roughing-scavenging, a regrind ball mill, and cleaner flotation cells. Copper concentrate produced in flotation will be dewatered by a thickener and pressure filter prior to shipment in trucks to the port. Reagent preparation and delivery systems (lime, flotation collectors, copper sulphate and frother) are provided.

CommodityParameter
Copper Concentrate Grade, %
Gold Head Grade, g/t
Gold Concentrate Grade, g/t
Silver Head Grade, g/t
Silver Concentrate Grade, g/t

Production:
2018 production data is represented for the period from January to October.

CommodityProductUnits2020201820172016201520142013
Copper Metal in concentrate t  ......  Subscription required6,5308,5498,3146,8849,26310,379
Gold Metal in conc./ doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in conc./ doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Concentrate kt
Gold Metal in concentrate oz
Gold Metal in doré oz
Silver Metal in doré oz
Silver Metal in concentrate oz
Subscription required - Subscription is required.

Operational Metrics:

Metrics2018
Annual processing capacity 1,300 t
Tonnes processed

Reserves at January 30, 2017:
The Mineral Resources do not include the current 2.6 Mt reserves below CDM's open pit mine.
Cut-off at 0.8% Cu.

CategoryTonnage CommodityGradeContained Metal
Measured 676 kt Copper 3 % 20,220 t
Measured 676 kt Gold 1.5 g/t 36 koz
Measured 676 kt Silver 54 g/t 1,299 koz
Measured 676 kt Zinc 4.5 % 30,230 t
Indicated 5,320 kt Copper 2.4 % 129,300 t
Indicated 5,320 kt Gold 1.3 g/t 248 koz
Indicated 5,320 kt Silver 46 g/t 8,614 koz
Indicated 5,320 kt Zinc 3.2 % 167,580 t
Measured & Indicated 5,996 kt Copper 2.5 % 149,500 t
Measured & Indicated 5,996 kt Gold 1.3 g/t 283 koz
Measured & Indicated 5,996 kt Silver 47 g/t 9,914 koz
Measured & Indicated 5,996 kt Zinc 3.3 % 197,810 t
Inferred 2,496 kt Copper 2.4 % 60,560 t
Inferred 2,496 kt Gold 1.4 g/t 120 koz
Inferred 2,496 kt Silver 47 g/t 4,173 koz
Inferred 2,496 kt Zinc 3.1 % 77,310 t
Total Resource 8,492 kt Copper 2.5 % 209,760 t
Total Resource 8,492 kt Gold 1.4 g/t 405 koz
Total Resource 8,492 kt Silver 47 g/t 14,087 koz
Total Resource 8,492 kt Zinc 3.2 % 275,150 t


Heavy Mobile Equipment as of July 18, 2018:
HME TypeModelQuantity
Drill ....................... Subscription required
Drill ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 1, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
Press Release 2018
Corporate Presentation 2017
Annual Report 2012
Technical Report 2007
Subscription required - Subscription is required.

Aerial view:

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