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Zimbabwe
Arcturus Mine

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 Location:
30 km E from Harare, Zimbabwe

  Address:
Arcturus
Zimbabwe
Phone+263-74-2021
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Shaft Depth 800 m
Production Start1907
Mine Life16 years (as of Jan 1, 2015)
The most recent full year production data were publicly available for 2015 (as of May 25, 2021).

The mine was acquired by Businessman Tawanda Nyambirai in 2017.

Apr 20, 2022 - Arcturus Mine's new US$7million gold processing plant is 65 percent complete and set for completion by the third quarter this year.


Owners

Source: p. 18
CompanyInterestOwnership
TN Securities (Pvt) Ltd. 100 % Indirect
TN gold is a mining company owned by Business mogul Tawanda Nyambira. The company owns Arcturus Gold Mine which previously belonged to Britain based Metallon Gold.

Contractors



Deposit Type

  • Hydrothermal


Summary:

Arcturus is situated (in the Enterprise belt) in the southern limb of the Harare Greenstone Belt. Orebodies generally comprise individual lenses which range from 0.2 m to 5.0 m in width and dip from 55° to 70°.

The Arcturus gold mine, located within the Shamvaian Group, is hosted in the Iron Mask Formation, which comprises a succession of metamorphosed felsic volcanics and associated metasediments including prominent bands of sulphide-facies iron formation, phyllites, meta-arenites, and quartzose schists (Oberthur et al., 2000). The mineralized shear zones in the Arcturus mine are characterized by silicification, biotite, and K-feldspar alteration. Gold mineralization is associated with pyrrhotite, arsenopyrite, and also occurs as free gold, which contributed up to 10% of production.

There are 6 major reefs at Arcturus: Venus, Arcturus, West, Slate, Saturn, Planet.
Venus.
- Ore bodies are irregularly – shaped, discontinuous and lenticular.
- Reefs comprise well banded to laminated siliceous lithologies that consist of millimetre to centimetre units of pink-brown, cherty layers of k-feldspar-quartz-biotite-arsenopyrite which alternate with amphibole – diopside – epidote – plagioclase units containing pyrrhotite and pyrite.
- Pyrrhotite and arsenopyrite are the dominant sulphides.
- Free gold is rare.
- The reefs are arranged in an en echelon array in the alteration zone.
- The ore bodies trend south-easterly and dip at 55 - 70 degrees to the north-east.
- The payshoots show variable pitch towards the west.
- Ore body widths vary from less than a metre to 30 metres.

Venus – Dolerite Dyke.
* The dolerite dyke (25 – 40m thick) dipping 60 degrees SW exists around 2 – 3 level.
* Ore bodies above the dyke were mined from surface.
* The intrusion of the dyke resulted in a reverse movement which subsequently resulted in a vertical displacement of 80 – 90m.


Mining Methods

Source:

Summary:

The current hoisting capacity is 15 ktpm. The average mined grade is 4.2g/t Au.


Crushing and Grinding


Processing

  • Gravity separation
  • Concentrate leach
  • Carbon in solution (CIS)
  • Carbon in pulp (CIP)
  • Elution

Source: Source

Summary:

Ore is processed through conventional crushing, milling, gravity recovery and a combination of carbon-in-solution and -pulp processes.

The current milling capacity is 15 ktpm.


Production:

CommodityUnits20152014
Gold oz 7,2428,316


Reserves at June 30, 2014:

CategoryTonnage CommodityGradeContained Metal
Proven 296 kt Gold 6.19 g/t 59 koz
Probable 854 kt Gold 5.1 g/t 140 koz
Proven & Probable 1,150 kt Gold 5.4 g/t 199 koz
Total Resource 7,331 kt Gold 4.4 g/t 1,046 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
CEO Tawanda Nyambirai LinkedIn Oct 11, 2022
Mine Manager Shingirayi Mwanza LinkedIn Oct 11, 2022
Production Manager Ashleigh Nyambirai LinkedIn Oct 11, 2022


Corporate Filings & Presentations:

DocumentYear
Other 2022
Other 2021
Press Release 2017
Annual Result 2016
Corporate Presentation 2015
Other 2015
Corporate Presentation 2014

Aerial view:

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