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Dominican Republic
Cerro De Maimon Mine

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 Location:
5 km SE from Maimon, Dominican Republic

  Address:
251 Adelaide Terrace Level 8
Perth
Western Australia, Australia
6000
Phone  ...  Subscription required
Fax61 8 6330 1099
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
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  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)


Owners

 
CompanyInterestOwnership
Perilya Ltd. 100 % Direct

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

  • Truck & Shovel / Loader


Summary:

Standard truck and excavator mining techniques are planned by GlobeStar in the open pit mining operations, utilizing back-hoe excavators and articulated haul trucks to move both ore and waste during initial mining operations. Once the pit area has been opened up and sufficient hard rock mining faces developed, GlobeStar plans to introduce rigid body trucks in order to increase productivity and increase the economies of scale. Mining operations will be carried out by a mining contractor working under the supervision of CMD.


Crushing and Grinding


Processing

  • Flotation
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)

Source: Subscription required

Summary:

Ore mined from both the oxide (gossan) and sulphide zones will be processed in the mill utilizing separate circuits for the two ore types, after treatment in a common crushing plant. The products will be gold-silver (doré) bullion and copper concentrate. A zinc flotation circuit is not considered at this time, but may be added later subject to satisfactory metallurgical test results.

The current mill design, which is at the stage of detailed engineering and procurement, is based generally on the concepts applied in the 2004 feasibility study by Pincock, Allen and Holt and the Update report by Behre Dolbear. These previous studies differed mainly in the scheduling of the ore processing and capacity of the milling operation.

The crushing plant includes a jaw crusher, cone crusher and a sizing screen for 8mm product. The two ore types will be crushed in campaigns of several days and the products stored on separate stockpiles.

The oxide mill, sized for 70 ........

Recoveries & Grades:

CommodityParameter2012
Copper Concentrate Grade, %  ......  Subscription required
Gold Head Grade, g/t 1.25
Gold Concentrate Grade, g/t  ......  Subscription required
Silver Head Grade, g/t 13.8
Silver Concentrate Grade, g/t  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityProductUnits2012
Copper Metal in concentrate t 11,504
Copper Concentrate t 51,360
Gold Metal in concentrate oz  ......  Subscription required
Gold Metal in doré oz  ......  Subscription required
Silver Metal in doré oz  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required

Operational Metrics:

Metrics20122011
Tonnes processed 714,113 t681,578 t

Reserves at December 1, 2012:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Sulphide & Mixed 2,740 kt Copper 2.6 % 71.2 kt
Proven Oxide 590 kt Gold 1.62 g/t 30.7 koz
Proven Sulphide & Mixed 2,740 kt Gold 0.91 g/t 80.2 koz
Proven Oxide 590 kt Silver 28 g/t 531 koz
Proven Sulphide & Mixed 2,740 kt Silver 29.8 g/t 2,625 koz
Probable Sulphide & Mixed 2,630 kt Copper 1.78 % 46.7 kt
Probable Oxide 311 kt Gold 1.5 g/t 15 koz
Probable Sulphide & Mixed 2,630 kt Gold 0.78 g/t 65.9 koz
Probable Oxide 311 kt Silver 24.9 g/t 249 koz
Probable Sulphide & Mixed 2,630 kt Silver 25.3 g/t 2,139 koz
Proven & Probable Sulphide & Mixed 5,370 kt Copper 2.2 % 117.9 kt
Proven & Probable Oxide 901 kt Gold 1.58 g/t 45.7 koz
Proven & Probable Sulphide & Mixed 5,370 kt Gold 0.85 g/t 146.1 koz
Proven & Probable Oxide 901 kt Silver 26.9 g/t 780 koz
Proven & Probable Sulphide & Mixed 5,370 kt Silver 27.6 g/t 4,764 koz


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 29, 2021
....................... Subscription required ....................... Subscription required Jan 29, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 29, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 29, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2012
Technical Report 2007
Subscription required - Subscription is required.

Aerial view:

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