• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Eritrea
Bisha Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
40 km W from Akordat, Eritrea
  Address:
61, Mariam Gimby PO Box 4276
Asmara
Eritrea
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Eritrea
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News
Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Zinc
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2028
The Bisha Copper-Zinc Mine is the key in production large-scale zinc mine in Eritrea.

Infrastructure construction for the Asheli Underground Mining Project is well underway.

Owners

Source: p. 5,379
CompanyInterestOwnership
Eritrean National Mining Corp. 45 % Indirect
Zijin Mining Group Co., Ltd 55 % Indirect
The Zijin Mining Group ultimately owns 55% equity interest in Bisha through Nevsun Eritrea, while Eritrean National Mining Corporation owns 45% equity interest in BMSC.

Contractors

Subscription required - Subscription is required.

Deposit Type

  • VMS

Summary:

The Bisha and Harena are large precious- and base metal-rich VMS deposits; Northwest, Hambok and Asheli are small to medium size VMS deposits.

The Property is underlain by Neoproterozoic upper green schist to lower amphibolite facies volcanics and sedimentary units of the Augaro Adobha Belt.

The Bisha Main deposit is a series of four massive sulphide lenses that occur over a 1.2 km north-south trending strike extent. The thickness of the lenses is variable up to 70 m. Mineralisation extends to a depth of 600 m below surface.

The massive sulphide bodies comprise a southern zone and a northern zone. The main part of the southern zone strikes approximately 345° and dips steeply to the west, with strike and dip lengths of some 600 m and 500 m respectively. The main part of the northern zone strikes approximately 0° and dips steeply to the west, with strike and dip lengths of some 500 m and 100 m respectively. The southern zone plunges 45° to the south. In the hanging walls of both the southern and northern zones, there are two smaller massive sulphide pods interpreted to be folded limbs of the two main zones.

The Gossan varies in composition from highly siliceous and ferruginous to massive goethite– hematite–jarosite. The Oxide Zone is up to 50 m deep and is composed of hematite, quartz and clays; in places, original rock textures are preserved. The Oxide zone is enriched in Au, Pb, Ba and Mo and depleted in Cu, Zn, Cd and Co.

Mining Methods

  • Truck & Shovel / Loader

Summary:

The Bisha Main and Harena deposits are mined as a conventional open pit operation. At Bisha Main, most of the in-pit haulage for waste will be carried out using 65-tonne haulage trucks and 10 m3 excavators, in 5 m benches. To control mining dilution and to increase selectivity smaller excavators will be utilised for ore mining. Harena pit will be mined using the same mining fleet and also in 5 m benches.

Waste rock will be moved and hauled to multiple rock storage facilities based on their geochemical characteristics and period of operation. Some of the mineralised waste will be stockpiled near the pit so that it can be recovered if commodity prices increase from current levels.

Mine design criteria:
- Bench height (final wall) - 10 m. Ore and waste will be mined in 5.0 m working benches.
- Bench face angle - 63°, 67°, 70°. Mainly 70°.
- Catch bench width - 6 m to 8.3 m. Varies based on the geotechnical zone, on final walls.
- Geotechnical berm - 16 m. At 140 m vertical intervals.
- Inter-Ramp angle - 39° to 46°. Varies by zone.
- Haulage road width - 32.5 m. Two way roads, includes berm and ditch.
- Maximum road slope 10%.
- Rock dump face angle - 34°. 25 m lifts and overall slope of 26°.

The Bisha Main ultimate pit is oriented in south-north direction. It broadly consists of two adjoining sections, a smaller pit in the north and the main pit to the south. The pit is ~1,400 m long (south to north) and ........

Crushing and Grinding
Source: Subscription required

Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.

Production:

CommodityUnits2023202220212020201920182017
Copper M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required3718
Zinc M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold oz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Annual ore mining capacity  ......  Subscription required
Annual mining capacity  ......  Subscription required  ......  Subscription required32 Mt22 Mt
Annual processing capacity  ......  Subscription required  ......  Subscription required2.4 Mt2.4 Mt2.4 Mt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required7.8
Ore tonnes mined  ......  Subscription required  ......  Subscription required2,050,000 t
Waste  ......  Subscription required  ......  Subscription required15,960,000 t
Tonnes processed  ......  Subscription required  ......  Subscription required2,233,000 t
Subscription required - Subscription is required.

Reserves at December 31, 2022:
NSR is the value of ore per tonne after deduction of refining costs, mining areas with different resources based on USD31/tonne, USD31/tonne, USD32/ tonne, USD33/tonne, USD100/tonne; Mining areas with different reserves based on USD42.24/tonne, USD42.56/ tonne, USD42.92/tonne, USD43.22/ tonne USD44.32/tonne, USD44.63/tonne

CategoryTonnage CommodityGradeContained Metal
Proven t Copper 19,000 t
Proven t Zinc 98,000 t
Probable t Copper 84,000 t
Probable t Zinc 421,000 t
Proven & Probable t Copper 0.77 % 103,000 t
Proven & Probable t Zinc 3.89 % 519,000 t
Measured & Indicated t Copper 397,100 t
Measured & Indicated t Zinc 1,087,500 t
Inferred t Copper 405,040 t
Inferred t Zinc 2,000,100 t
Total Resource t Copper 0.97 % 802,140 t
Total Resource t Zinc 3.75 % 3,087,600 t

Commodity Production Costs:

CommodityUnits20172016
C1 cash costs Zinc USD 0.97 / lb  
C1 cash costs Copper USD 1.72 / lb   1.04 / lb  
C1 cash costs Zinc USD 0.88 / lb†  
† Net of By-Product.

Financials:

Units2022202120202019201820172016
Sustaining costs M USD 26.1  
Capital expenditures M USD 37.4   90.1  
Operating Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gross profit M 12.6  USD
After-tax Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Cash Flow M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required

Water Supply
Source: Subscription required

- subscription is required.

Heavy Mobile Equipment as of December 31, 2016:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required 4.633 m blade width ....................... Subscription required
Drill ....................... Subscription required 229 mm ....................... Subscription required
Drill ....................... Subscription required 150 mm ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required 4.677 m blade width ....................... Subscription required
Grader ....................... Subscription required 4.267 m blade width ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Truck (haul) 65 t ....................... Subscription required
Truck (water) 56781 l ....................... Subscription required
Truck (water) 30283 l ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Aug 23, 2023
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Technical Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.