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Zimbabwe
Blanket Mine

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 Location:
14 km NW from Gwanda, Zimbabwe

  Regional Office:
4th Floor, No. 1, Quadrum Office Park Constantia Boulevard Floracliffe
Johannesburg
South Africa
1725
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  • Overview
  • Owners
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  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Underhand stoping
  • Longhole open stoping
Production Start...
Mine Life2027
Blanket Gold Mine is a well-established Zimbabwean gold mine, which operates at a depth of approximately 750 meters below surface. Blanket also holds brownfield exploration and development projects both on the existing mine area and on its satellite properties which are within trucking distance of the Blanket metallurgical recovery plant.

Blanket Mine:
-One of the highest yields in the gold industry;
-Mining area has eight ore shoots in the producing;
-Approximately 1,200 tonnes of ore per day.


Owners

Source: p. 3
CompanyInterestOwnership
Caledonia Mining Corporation plc 64 % Indirect
Ownership Tree
The Blanket Mine operates under a mining lease ML40 issued to Blanket Mine (1983) (Pvt) Ltd, which is incorporated in Zimbabwe and a 64% owned, indirect subsidiary of Caledonia Mining Corporation Plc.

Contractors

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Deposit Type

  • Hydrothermal
  • Replacement


Summary:

DEPOSIT TYPES
The Blanket orebodies comprise up to 10% of precious metals. The Blanket mineralisation is hydrothermally emplaced and associated with the regionally developed D2 deformation characterised by areas of high strain wrapping around relatively undeformed remnants of the original basaltic flows. Wider orebodies occur within the more ductile tensional high strain areas. Two main types of mineralisation are recognised at Blanket, namely Disseminated Sulphide Reefs (DSR) and quartz-filled reefs and shears. A third type of mineralisation may be evidenced in the form of auriferous sulphide minerals as a replacement of the iron-rich minerals along the hinges of the folds in BIF.

MINERALISATION
Mining at Blanket occurs over a 3 km strike that includes from north to south, the deposits of Lima, Eroica, Sheet, AR Main, AR South, Feudal, Blanket Section (Blanket 1 to Blanket 6) and Jethro. The main Blanket underground workings are connected to Lima by a 2 km long haulage which follows the strike of the main fabric.

Wall rock alteration typically comprises silica-pyrite-muscovite within a broader carbonate alteration halo. Quartz-carbonate altered rock forms the most commonly recognised alteration assemblage. Gold is deposited at crustal levels within and near the brittle-ductile transition zone at:
• depths of between 6 km and 12 km;
• pressures between 1 and 3 kilobars; and
• temperatures between 200ºC and 400ºC.

The d ........


Mining Methods

  • Underhand stoping
  • Longhole open stoping


Summary:

Blanket Mine uses two mining methods which are well suited to the nature of the greenstone belt deposits. The orebodies range from generally steeply dipping sheet-like deposits of a few meters in width, to pipe-shaped and massive deposits with widths more than 50 m. The extreme variation within the Blanket Mine mineral deposits, necessitates modification of the exact mining methods that suits the specific characteristics of each mineral deposit The general practice on Blanket Mine is to implement one of two tailored mining methods, determined mainly by the width of the mineral deposit.

The two mining methods utilised are:
- Long-hole stoping in wider mineral deposits (orebody widths generally more than 3 m); and
- Underhand stoping in narrow mineral deposits (orebody widths generally less than 3 m).

Long-Hole Stoping
Blanket Mine uses long-hole stoping in the orebodies with a width greater than 3 m. It can also be applied in instances where the ground conditions render an area unsafe to be mined using conventional underhand stoping method. Long-hole stoping is a selective and highly productive mining method that provides good ore recovery. The method is flexible and allows for practical modifications to the mining sequence and configuration to suit the characteristics of the orebody. Long Hole drilling entails using drifter machines to drill holes which cover the full span of the sublevel interval and then blasting them. When the block has ........


Crushing and Grinding
Source: Source
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2023202220212020201920182017
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required54,51156,133
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202320222021202020192018
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required597,962 t556,331 t560,913 t
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required3,800 t3,800 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required571,061 t556,440 t545,267 t
Daily ore mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required1,200 t1,200 t
^ Guidance / Forecast.
Subscription required - Subscription is required.

Reserves at December 31, 2022:
Mineral Resources cut-off applied 1.5 g/t.

Mineral Reserves cut-off of 2.1 g/t applied.

CategoryTonnage CommodityGradeContained Metal
Proven 1,861 kt Gold 3.23 g/t 193,022 oz
Probable 2,031 kt Gold 2.92 g/t 190,945 oz
Proven & Probable 3,892 kt Gold 3.07 g/t 383,967 oz
Measured 4,642,577 t Gold 3.23 g/t 482,459 oz
Indicated 5,594,090 t Gold 3.03 g/t 544,647 oz
Measured & Indicated 10,236,667 t Gold 3.12 g/t 1,027,106 oz
Inferred 8,981,938 t Gold 2.92 g/t 842,345 oz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Cash costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 690 / oz   633 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 802 / oz†   847 / oz†  
All-in costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,128 / oz†   1,162 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 19.9   20.9  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 68.4   69.8  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21.4   20.6  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21.6   26.3  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 21.2   20.6  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 13.8   11.9  
EBITDA M USD
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 17.7   24.5  
Subscription required - Subscription is required


Water Supply
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Heavy Mobile Equipment as of December 31, 2022:
HME TypeQuantityStatus
Loader ....................... Subscription required Existing
Load-Haul-Dump (LHD) ....................... Subscription required Existing
Locomotive ....................... Subscription required Existing
Rockbreaker ....................... Subscription required Existing
....................... Subscription required ....................... Subscription required Proposed
Truck (dump) ....................... Subscription required Existing
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 9, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 14, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 14, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 9, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2023
Quarterly Report 2023
Corporate Presentation 2022
Form 20-F 2022
Management Discussion & Analysis 2022
Sustainability Report 2022
Technical Report 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Press Release 2018
Technical Report 2018
Management Discussion & Analysis 2017
Corporate Presentation 2016
Management Discussion & Analysis 2016
Technical Report 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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