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DRC
Twangiza Mine

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 Location:
23 km SW from Lubarika, DRC

  Regional Office:
374, Avenue Colonel Mondjiba, Commune de Ngaliema
Kinshasa
DRC
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusTemporary Suspension
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life14 years (as of Jan 1, 2015)
There are no production activities in the Twangiza Mine since 2019.


Owners

Source:
CompanyInterestOwnership
Baiyin International Investment Ltd. 34.5 % Indirect
Shomka Capital Limited 65.5 % Indirect
Shomka Resources Ltd. (operator) 100 % Direct
Canadian miner Banro Corporation has agreed to sell its Namoya Mining gold mine in Democratic Republic of Congo to a consortium of investors including Baiyin International Investment and Shomka Resources.

The Chinese company bought Barno's Twangiza mine in January for 1$.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Sediment-hosted


Summary:

The Twangiza property can be divided into three distinct litho-structural terrains which can be seen in the figure below. The eastern terrain is characterised by N-S trending Neoproterozoic sediments, which are part of the Itombwe synclinorium, a regional-scale fold which extends southwards from the Twangiza area for about 150 km.

The sediments in the Neoproterozoic terrain are generally very weakly metamorphosed. The dominant lithology is mudstone, often with a significant amount of carbonaceous material. Subordinate units of siltstone are commonly interbedded with the mudstone, being slightly coarser, more siliceous and harder. Quartz wacke and sandstone occur locally, but are usually confined to relatively thin beds or lenses which lack continuity.

In the vicinity of the Twangiza Main and North deposits, the Neoproterozoic sediments have been intruded by porphyritic sills, ranging in thickness from less than 1 m to over 50 m. The sills have undergone extensive hydrothermal alteration and the original composition is difficult to determine. However, it is possible that the sills are part of a suite of alkaline intrusive rocks that were emplaced along the line of the present-day Western Rift, at about 750 Ma. Small granitic intrusions have been found in the Neoproterozoic rocks, and have been locally exploited for tin by colonial prospectors and artisanal miners. It is believed these granites are younger than the G4 tin granites which were emplaced at 9 ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining operations are based on conventional open cast techniques. Excavation of the ore and waste rock on 2.5m high mining benches will be performed by hydraulic excavators in backhoe configuration loading out to 40 tonne nominal capacity articulated dump trucks (Bell B40D or Cat equiv.). Mining is free dig in the oxide zone with any harder transition and fresh materials drilled and blasted on 5.0 m benches.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits201920182017201620152014
Gold koz  ......  Subscription required10111010413698
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics2017201620152014
Total tonnes mined 10,668,945 t3,284,874 t3,595,645 t
Ore tonnes mined 2,208,446 t2,061,730 t1,927,744 t
Tonnes milled 1,772,065 t of ore1,673,178 t of ore1,714,593 t of ore1,358,726 t of ore
Stripping / waste ratio 3.83 0.59 0.84
Waste 1,223,144 t1,618,047 t

Reserves at December 31, 2015:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven 6.21 Mt Gold 2.19 g/t 0.44 M oz
Probable 21.47 Mt Gold 2.01 g/t 1.39 M oz
Proven & Probable 27.67 Mt Gold 2.05 g/t 1.82 M oz
Measured & Indicated Oxide 11.06 Mt Gold 1.89 g/t 0.67 M oz
Measured & Indicated Transitional sulphide 88.29 Mt Gold 1.42 g/t 4.02 M oz
Inferred Oxide 1.56 Mt Gold 1.2 g/t 0.06 M oz
Inferred Transitional sulphide 8.27 Mt Gold 1.17 g/t 0.31 M oz

Commodity Production Costs:

CommodityUnits20162015
Cash costs Gold USD 712 / oz   553 / oz  
All-in sustaining costs (AISC) Gold USD 873 / oz   657 / oz  

Financials:

Units2016
Capital expenditures M USD 23  
After-tax Income M USD 4.1  
EBITDA M USD 40.7  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 3, 2022
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Staff:

EmployeesYear
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
Corporate Presentation 2017
Corporate Presentation 2017
Press Release 2016
Annual Information Form 2015
Annual Report 2015
Technical Report 2015
Technical Report 2011
Other 2009
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