• 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
Tanzania
North Mara Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
23 km SE from Tarime, Tanzania

  Regional Office:
Tan House Tower, Plot Number 34/1 Ursino South, New Bagamoyo Road Post Office Box 1081
Dar es Salaam
Tanzania
Phone  ...  Subscription required
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 Tanzania
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • 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 / Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole open stoping
  • Cemented backfill
Processing
  • Gravity separation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • AARL elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life9 years (as of Jan 1, 2017)
The mine is a combined open pit and underground operation from two deposits, Gokona (underground) and Nyabirama (open pit).
Latest NewsBarrick Gold Corporation: Twiga a Triumph of Partnership     October 23, 2020


Owners & OPERATOR

Source: p. 176
CompanyInterestOwnership
Government of Tanzania 16 % Indirect
Barrick Gold Corp. 84 % Indirect
Twiga Minerals Corporation Ltd. (operator) 100 % Direct
On January 24, 2020, Barrick announced that the Company had ratified the creation of Twiga Minerals Corporation at a signing ceremony with the President of Tanzania, formalizing the establishment of a joint venture between Barrick and the GoT and resolution of all outstanding disputes between Barrick and the GoT, including the lifting of the previous concentrate export ban, effective immediately. The GoT will receive a free carried shareholding of 16% in each of the former Acacia mines (Bulyanhulu, Buzwagi and North Mara), and will receive its half of the economic benefits from taxes, royalties, clearing fees and participation in all cash distributions made by the mines and Twiga, after the recoupment of capital investments. Twiga will provide management services to the mines.

Deposit Type

  • Vein / narrow vein


Summary:

The North Mara Mine is situated within the Mara Greenstone Belt. The underlying geology comprises felsic and mafic volcanics intercalated with sediments which are intruded by various granitoid and gabbroic plutonic rocks. Tertiary volcanic lava flows partially cover the underlying Archaean geology and the ore bodies are structurally controlled, shear-hosted lode gold deposits. There are several types of gold mineralisation including shear-zone-related quartz vein and disseminated gold.


Mining Methods

  • Truck & Shovel / Loader
  • Longhole open stoping
  • Cemented backfill


Summary:

The mine is a combined open pit and underground operation from two deposits, Gokona (underground) and Nyabirama (open pit).

At Gokona, Acacia utilizes an existing exploration decline for initial access to the planned underground mine. Two major declines are included in the mine plan.

The mining method utilised in the operation is Long Hole Open Stoping (“LHOS”) with Cemented Aggregate Fill (“CAF”).


Crushing and Grinding


Processing

  • Gravity separation
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • AARL elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Both oxide and sulphide reserves are mined and processed by conventional carbon-in-leach (CIL) technology.

The ore is hauled in 80 tonne dump trucks up to the Run of Mine (ROM) pad at Nyabirama. The ore is drawn out of the ROM bin and fed onto a vibrating grizzly screen by means of an apron feeder. The undersize material passes through the grizzly onto a conveyor belt while the oversize material passes through a jaw crusher which discharges onto the same conveyor belt. The ore is fed onto a banana screen via a two tier conveyor system. The undersize from the banana screen passes onto a conveyor belt which feeds the SAG mill feed stock pile while the oversize material is fed into a secondary cone crusher. The crushed ore from the secondary stockpile is tipped onto the SAG feed stockpile.

The ore is drawn from underneath the SAG mill feed stockpile onto the SAG mill feed conveyor belt by means of three vibrating feeders. It is fed into the SAG mill for primary g ........

Recoveries & Grades:

CommodityParameter2019201820172016201520142013
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 4.543.94.53.63.53.5
Subscription required - Subscription is required.

Production:

CommodityUnits201920182017201620152014
Gold koz  ......  Subscription required  ......  Subscription required324378287274
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required15,996 kt15,408 kt16,265 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required3,192 kt3,659 kt2,569 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required2,830 kt2,833 kt2,804 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Annual milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven & Probable In-Situ (OP) 17.86 Mt Gold 1.49 g/t 0.87 M oz
Proven & Probable In-Situ (UG) 6.9 Mt Gold 5.4 g/t 1.19 M oz
Proven & Probable Total 25 Mt Gold 2.57 g/t 2.02 M oz
Measured In-Situ (OP) 2.74 Mt Gold 2.37 g/t 0.21 M oz
Measured In-Situ (UG) 0.88 Mt Gold 6.13 g/t 0.18 M oz
Measured Total 3.69 Mt Gold 3.28 g/t 0.38 M oz
Indicated In-Situ (OP) 32.14 Mt Gold 1.73 g/t 1.79 M oz
Indicated In-Situ (UG) 11.9 Mt Gold 4.57 g/t 1.79 M oz
Indicated Total 44.07 Mt Gold 2.52 g/t 3.57 M oz
Inferred In-Situ (OP) 2.14 Mt Gold 1.1 g/t 0.071 M oz
Inferred In-Situ (UG) 7.5 Mt Gold 4.5 g/t 1.083 M oz
Inferred Total 9.64 Mt Gold 3.7 g/t 1.155 M oz

Commodity Production Costs:

CommodityUnits2019201820172016201520142013
Cash costs (sold) Gold USD 410 / oz† 590 / oz† 623 / oz† 659 / oz†
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required 513 / oz
Total cash costs Gold USD  ......  Subscription required†  ......  Subscription required† 509 / oz†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required 777 / oz
All-in sustaining costs (AISC) Gold USD  ......  Subscription required†  ......  Subscription required† 773 / oz†
All-in sustaining costs (sold) Gold USD 733 / oz† 915 / oz† 947 / oz† 1,227 / oz†
All-in costs Gold USD  ......  Subscription required  ......  Subscription required 808 / oz
All-in costs Gold USD  ......  Subscription required†  ......  Subscription required†
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2019201820172016201520142013
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 50.1   88.1   93.7  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 19.7   18.1   38.4  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 335.71   347.34   365.39  
Operating Income M USD  ......  Subscription required
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 67.2   81.4   -208.31  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 134.63   156.31   167.51  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 17, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
Annual Report 2017
Annual Report 2016
Other 2016
Annual Report 2014
Other 2014
Project Description 2009
Subscription required - Subscription is required.

News:

NewsDate
Barrick Gold Corporation: Twiga a Triumph of Partnership October 23, 2020

Aerial view:

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2020 MDO Data Online Inc.