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DRC
Mpama South Expansion Project (Bisie (Mpama North))

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 Location:
60 NW from Walikale, DRC

  Project Contacts:
Logu au croisement de la Nationale N°3 et de la route menant à Bisie Walikale, Nord – Kivu
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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Tin
Mining Method
  • Longhole open stoping
  • Backfill
Production Start...
Mine Life2028
June 3, 2022 - Early works completed to date since the Company’s announcement of the development decision on 29th March 2022 are as follows:
- EPCM contract awarded to Obsideo (who successfully executed the fine tin plant in 2021);
- Long lead time plant capital orders have been placed as well as steel structure orders;
- Mpama South access road completed and site clearing commenced;
- Bidding completed and under evaluation for bulk earthworks and civil contracts.
Latest NewsAlphamin Announces Successful Infill Drilling at Mpama South With Increase in Both Resource Confidence and Mineral Resources     February 10, 2023


Owners

Source: p. 27
CompanyInterestOwnership
Government of the Democratic Republic of the Congo 5 % Indirect
Industrial Development Corporation 10.86 % Indirect
Alphamin Resources Corp. 84.14 % Indirect
Ownership Tree
Alphamin Resources Corp. (Alphamin), through its jointly owned indirect subsidiary, Alphamin Bisie Mining SA (ABM), has legal title over three exploration permits (numbers: PR 10346; PR 5266; and PR 5267) and one mining permit (PE 13155). The Mpama North Mine, the Mpama South development Project and the Bisie Ridge exploration target, collectively known as the Bisie Tin Complex or Bisie Tin Mine, are located on the mining permit PE 13155.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

The tin deposit is a cassiterite-bearing vein system adjacent and possibly distal to an underlying source granite. From the composition of the mineralization, it was concluded that the mineralization has a low temperature origin, with a probable granitic source. Fluorine and lithium are absent from the ore forming fluids and base metal sulphides are scarce in the cassiterite. The deposit has up to 0.5% rare earth elements (REE) and very high-grade tin (with some sample assays reaching >60% Sn). This may indicate the source granite to be at depth below the surface.

The age of the Bisie cassiterite is 1053 Ma to 1068 Ma – it therefore may have been precipitated penecontemporaneously with deposition of the host sediments. Ore forming processes at Bisie are, therefore, either related to a granite that is also circa 1060 Ma old and as yet undiscovered, or they are associated with synsedimentary exhalative processes and unrelated to a granite intrusion. In the latter case, Bisie mineralization may be more closely analogous to Neves Corvo in Portugal, where a tin-rich, stratiform, massive sulphide deposit has formed, than it is to deposits such as San Rafael in Peru.

The first phase of exploration diamond drilling was completed at Mpama South in May 2015 and comprised 16 drillholes (plus three re-drills) drilled from east to west and spaced 50-100m apart on seven drill lines for 3,364metres. This early phase of drilling served both as a confirmatory/discovery ........


Mining Methods

  • Longhole open stoping
  • Backfill


Summary:

The access to the Mpama South underground mining areas will be via an adit and access drive developed into the side of a hill on the footwall side of the deposit. The access drive will be horizontal to a point where the deposit is intersected at which point ramps will be developed both upwards and downwards in the footwall of the deposit to access the vertical extent of the deposit.

Due to the lack of site specific data, the properties used to design the Mpama North boxcut were benchmarked to be used for the Mpama South boxcut design. This data has been used to complete a conceptual design and to provide cross-sections through the boxcut and provide the recommended support requirements for the highwall and sidewalls, at a concept level of accuracy.

The slope angles used for the Mpama North boxcut were superimposed over the topography at the Mpama South boxcut location. The sidewalls were assumed to be excavated in soft or weathered material, while the highwall will be excavated partly through soft or weathered material and partly through more competent transitional mica schist.

The soft or weathered material was assumed to extend to between 25.0m and 30.0m below surface, therefore, the boxcut would need to be 30.0m deep. The bench heights of the highwall and sidewall should be limited to 10.0m, with a berm width of 6.5m. The highwall bench face angles should be limited to 80°, the sidewall bench face angles should be limited to 45°. All bench ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityProductUnitsAvg. Annual
Tin Concentrate kt 13
Tin Metal in concentrate kt 7.2

Operational Metrics:

Metrics
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
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Reserves at May 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Indicated 0.84 Mt Tin 2.53 % 21,400 t
Inferred 4.99 Mt Tin 2.5 % 124,750 t

Commodity Production Costs:

CommodityUnitsAverage
Cash costs (sold) Tin USD  ......  Subscription required&nbs
All-in sustaining costs (sold) Tin USD  ......  Subscription required&nbs
Assumed price Tin USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
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Operating Costs:

Units2022
UG mining costs ($/t milled) USD 68.1 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
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Proposed Heavy Mobile Equipment as of April 22, 2022:
HME TypeModelQuantity
Drill ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 22, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Preliminary Economic Assessment 2022
Quarterly Report 2022
Quarterly Report 2022
Subscription required - Subscription is required.

News:

NewsDate
Alphamin Announces Successful Infill Drilling at Mpama South With Increase in Both Resource Confidence and Mineral Resources February 10, 2023

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