Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Shaft Depth |
800 m |
Production Start | 1907 |
Mine Life | 2031 |
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. |
Source:
p. 18
Company | Interest | Ownership |
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.
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.
Source:
Summary:
The current hoisting capacity is 15 ktpm. The average mined grade is 4.2g/t Au.
Processing
- Gravity separation
- Concentrate leach
- Carbon in solution (CIS)
- Carbon in pulp (CIP)
- Elution
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:
Commodity | Units | 2015 | 2014 |
Gold
|
oz
| 7,242 | 8,316 |
Reserves at June 30, 2014:
Category | Tonnage | Commodity | Grade | Contained 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
|
Mine Management:
Job Title | Name | Profile | Ref. Date |
CEO
|
Tawanda Nyambirai
|
|
Oct 11, 2022
|
Mine Manager
|
Shingirayi Mwanza
|
|
Oct 11, 2022
|
Production Manager
|
Ashleigh Nyambirai
|
|
Oct 11, 2022
|
Corporate Filings & Presentations: