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Ghana
Nzema Mine

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 Location:
53 km WNW from Takoradi, Ghana

  Regional Office:
Site Office Nkroful
P.O. Box ES 31
Essiama
Ghana
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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
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2023


Owners

Source: p. 1
CompanyInterestOwnership
Government of Ghana 10 % Indirect
Nguvu Holdings Ltd. 90 % Indirect
Adamus Resources Limited (operator) 100 % Direct
Adamus Resources Limited is the first mine to be owned by Nguvu Holdings (formerly known as BCM Investments Limited). The mine was acquired from Endeavour Mining in 2017. Nguvu Holdings has 90% economic interest in the mine, with the Government of Ghana holding the remaining 10%.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Mesothermal


Summary:

The mineral deposits on the property include Salman Trend and Adamus deposits and also several smaller deposits (Bokrobo, Akropon, Nfutu, Aliva and Avrebo). Salman Trend gold deposits are believed to be associated with the same beltmargin shear zones that host the other Ashanti Belt gold deposits and has many characteristics typical of these deposits.

Major gold deposits in Ghana are hosted by proterozoic rocks of the West African Craton, including the Birimian Supergroup, a series of metavolcanic and metasedimentary rocks, the Tarkwaian Group, comprising fluvial metasedimentary rocks, and various gabbroic to granitic intrusives. Gold mineralization within the Birimian Supergroup is structurally controlled and associated with mesothermal quartz veins and sulphide concentrations, while both mesothermal shear hosted and palaeoplacer gold deposits occur in the Tarkwaian Group. The Nzema Project is within the Birimian Supergroup rocks with minor granitic intrusions, bounded by large granitoid bodies to the west and east, and is devoid of Tarkwaian Group rocks.

The Salman Trend is defined by a semi continuous +200ppb gold in soil anomaly extending for at least 9 kilometres along the Salman Shear Zone. Approximately 8.5 kilometres of strike extent has been drill tested to date with several discrete, multi-lode gold deposits identified along the shear zone. Significant oxide gold deposits within the Salman Trend include, from south to north, Salman South, Salma ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining method is conventional open pit mining including drilling, blasting, loading and hauling operations. Mining activities is by owner mining.

Drilling and blasting is performed on 6 to 15m benches, depending on geological and geotechnical settings of a given deposit, with blasted material excavated in discrete 3m high flitches.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required103,731115,62187,710
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics2017201620152014
Total tonnes mined 6,873 kt9,295 kt8,144 kt8,769 kt
Ore tonnes mined 1,427 kt1,000 kt1,310 kt1,366 kt
Tonnes milled 1,499 kt1,761 kt1,783 kt1,587 kt
Stripping / waste ratio 3.81 8.3 5.22
Annual processing rate 1.6 kt of ore1.6 Mt of ore
Waste 8,295 kt6,834 kt

Reserves at June 30, 2017:

CategoryTonnage CommodityGradeContained Metal
Proven 2.1 Mt Gold 2.73 g/t 181 koz
Probable 1.3 Mt Gold 2.7 g/t 110 koz
Proven & Probable 3.3 Mt Gold 2.72 g/t 291 koz
Measured 21.1 Mt Gold 1.37 g/t 929 koz
Indicated 12 Mt Gold 1.31 g/t 502 koz
Measured & Indicated 33.1 Mt Gold 1.35 g/t 1,431 koz
Inferred 5.9 Mt Gold 1.29 g/t 243 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs (sold) Gold USD 1,062 / oz  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 981 / oz  
All-in sustaining costs (sold) Gold USD 858 / oz   1,167 / oz  
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Operating Costs:

Units20162015
OP mining costs ($/t mined) USD 4.644.73
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
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Financials:

Units202120202019201820172016
Capital expenditures (planned) M USD 5  
Sustaining costs M USD 3.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 131   107  
Operating Income M USD -2.5  
After-tax Income M USD -88.9  
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Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Dozer (crawler) ....................... Subscription required ....................... Subscription required Apr 2, 2013
Drill ....................... Subscription required ....................... Subscription required Apr 2, 2013
Excavator ....................... Subscription required ....................... Subscription required Apr 2, 2013
Excavator ....................... Subscription required ....................... Subscription required Apr 2, 2013
Excavator ....................... Subscription required ....................... Subscription required Apr 2, 2013
Grader ....................... Subscription required ....................... Subscription required Apr 2, 2013
Grader ....................... Subscription required ....................... Subscription required Apr 2, 2013
Loader ....................... Subscription required ....................... Subscription required Apr 2, 2013
Truck (haul) ....................... Subscription required ....................... Subscription required Apr 2, 2013
Truck (haul) ....................... Subscription required ....................... Subscription required Apr 2, 2013
Truck (haul) ....................... Subscription required ....................... Subscription required Apr 2, 2013
Truck (haul) ....................... Subscription required ....................... Subscription required Apr 2, 2013
Truck (haul) ....................... Subscription required 100 t ....................... Subscription required Feb 24, 2023
Truck (water) ....................... Subscription required ....................... Subscription required Apr 2, 2013
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
....................... Subscription required ....................... Subscription required Subscription required Jan 31, 2023
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Staff:

Total WorkforceYear
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Other 2023
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Press Release 2018
Press Release 2018
Corporate Presentation 2017
Management Discussion & Analysis 2016
Management Discussion & Analysis 2015
Other 2015
Technical Report 2012
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