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Namibia
Rosh Pinah Mine (Rosh Pinah Expansion Project)

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 Location:
0 km NE from Rosh Pinah, Namibia

  Address:

Rosh Pinah
Namibia
Phone  ...  Subscription required
Fax+264-63-274-209
WebsiteWeb
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  • Overview
  • Owners
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  • Mining
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  • Costs & Financials
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
  • Gold
Mining Method
  • Longitudinal open stoping
  • Longhole open stoping
  • Transverse open stoping
  • Paste backfill
Production Start...
Mine Life2032


Owners

Source: p. 24
CompanyInterestOwnership
Trevali Mining Corp. 90 % Indirect
Rosh Pinah Zinc Corporation (Pty) Ltd. (operator) 100 % Direct
The Rosh Pinah Mine is owned by Rosh Pinah Zinc Corporation (Pty) Ltd. (“RPZC”). Trevali owns a 90% interest in RPZC and is operationally responsible for the management of RPZC, with the remainder held by PE Minerals (Namibia) (Proprietary) Limited (“PE Minerals”), Jaguar Investments Four (Proprietary) Limited (“Jaguar”) and an Employee Empowerment Participation Scheme (“EEPS”).

Contractors

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Deposit Type

  • SEDEX


Summary:

The Rosh Pinah deposit is hosted by the Rosh Pinah Formation (Hilda Subgroup of the Port Nolloth Group), forming part of the Neoproterozoic Gariep Terrane deposited onto a Palaeo-Mesoproterozoic basement of granite gneisses and supracrustals. The Gariep Terrane is divided into two distinct tectono-stratigraphic sub-terranes; the eastern, para-autochthonous Port Nolloth Group and the western, allochthonous Marmora Terrane.

The base metal sulphides (BMS) at Rosh Pinah are contained within the approximately 30 m thick mineralized horizon, which is locally termed the ore equivalent horizon (OEH). In the Property, the Rosh Pinah Formation has been shown to be at least 1,250 m thick.

The major mineralization types are:
• Microquartzite and argillite;
• Arkose / breccia;
• Carbonate.

The Rosh Pinah deposit is hosted by a thick package of turbidites comprising hinterland and contemporaneous volcanic clastics deposited in a Neo-Proterozoic rift basin during the early part of the evolution of the Gariep Terrane of southern Namibia. Metals scavenged from a primary argillite mineralization were concentrated by late hydrothermally driven carbonate alteration, providing a carbonate host. Basin inversion led to oblique continental collision and complex deformation of the deposit, resulting in two phases of disharmonic overfolding with associated faulting and shearing.

The deposit is consequently presented as a series of discrete car ........


Mining Methods

  • Longitudinal open stoping
  • Longhole open stoping
  • Transverse open stoping
  • Paste backfill


Summary:

Current mining method
Rosh Pinah is an existing operating underground mine with well-established mining methods. The current mining method is LHOS without backfill using a Primary, Secondary, and Tertiary top-down extraction sequence. Mining using this LHOS method since 1969 has resulted in significant voids within the historical and currently mined zones.

Ore is sourced from six steeply-dipping zones, with an increasing proportion sourced from the WF3 and AAB zones, as the eastern zone (EOF) and southern-central zone (SF3, SF3, and BME) are depleted.

Access to the production areas is via multiple interconnecting declines that provide fresh air intake into the mine. A new independent decline from surface to the WF3 zone is proposed.

The current mining areas use a LHOS Primary / Secondary extraction sequence with no backfill, except for WF3, which uses a LHOS Primary / Secondary / Tertiary extraction sequence with no backfill.

The current mining fleet consists of mechanized mobile and ancillary fleet including development jumbos, production drills, loaders and 30 t trucks for haulage to an underground crushing and conveying system (notionally called the Krupp). Future plans include the use of 60 t trucks to haul WF3 material directly to surface.

Current ore haulage is via a decline to the Krupp tip point comprising three ore silos in which to tip. Blending of the ore is conducted using the ore silos to maintain a cons ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Zinc Payable metal M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required948876
Lead Payable metal M lbs  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Payable metal koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Concentrate kt 1089781
Lead Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Payable metal oz  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required714,356 t627,295 t
Tonnes milled  ......  Subscription required  ......  Subscription required705,651 t641,980 t663 t560 kt
Daily milling capacity  ......  Subscription required  ......  Subscription required2,000 t2,000 t2,000 t
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Reserves at December 31, 2021:
The Rosh Pinah Underground Mine Mineral Reserve estimate is reported based on planned stopes with a net smelter return cut-off value of $50/tonne, with average metal prices of: $1.17/lb zinc, $1.00/lb lead and $24.13/oz silver.
The Rosh Pinah Underground Mine Mineral Resource estimate is reported based on a cut-off grade of 4% ZnEq.

CategoryTonnage CommodityGradeContained Metal
Proven 7.5 Mt Zinc 5.64 % 933 M lbs
Proven 7.5 Mt Lead 1.29 % 213 M lbs
Proven 7.5 Mt Silver 20.1 g/t 4,844 koz
Probable 9.25 Mt Zinc 5.9 % 1,202 M lbs
Probable 9.25 Mt Lead 1.24 % 253 M lbs
Probable 9.25 Mt Silver 19.45 g/t 5,781 koz
Proven & Probable 16.74 Mt Zinc 5.78 % 2,135 M lbs
Proven & Probable 16.74 Mt Lead 1.26 % 466 M lbs
Proven & Probable 16.74 Mt Silver 19.74 g/t 10,625 koz
Measured 10.84 Mt Zinc 7.34 % 1,755 M lbs
Measured 10.84 Mt Lead 1.87 % 447 M lbs
Measured 10.84 Mt Silver 28.3 g/t 9,865 koz
Indicated 9.1 Mt Zinc 7.42 % 1,488 M lbs
Indicated 9.1 Mt Lead 1.79 % 359 M lbs
Indicated 9.1 Mt Silver 27.8 g/t 8,132 koz
Measured & Indicated 19.94 Mt Zinc 7.38 % 3,244 M lbs
Measured & Indicated 19.94 Mt Lead 1.83 % 805 M lbs
Measured & Indicated 19.94 Mt Silver 27.71 g/t 17,764 koz
Inferred 0.78 Mt Zinc 8.09 % 139 M lbs
Inferred 0.78 Mt Lead 1.41 % 24 M lbs
Inferred 0.78 Mt Silver 47.36 g/t 1,183 koz

Commodity Production Costs:

CommodityUnits202220212020201920182017
All-in sustaining costs (AISC) Zinc USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 0.9 / lb†   0.85 / lb†  
C1 cash costs Zinc USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 0.7 / lb†   0.47 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units201920182017
Total operating costs ($/t milled) USD 545956.1

Financials:

Units20222021202020192018
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 19.5  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 92  
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -56.5  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -38.6  
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Heavy Mobile Equipment as of May 1, 2018:
HME TypeModelQuantity
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Scoop Tram ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 27, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Management Discussion & Analysis 2018
Technical Report 2018
Annual Information Form 2017
Management Discussion & Analysis 2017
Technical Report 2017
Year-end Mineral Reserves 2016
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