• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
South Africa
Prieska Mine

This page is not tailored to
devices with screen width under 750 px.
 Location:
50 km SW from Prieska, South Africa

  Project Contacts:
Dunkeld Court 16 North Rd, Dunkeld West, Randburg
Johannesburg
South Africa
2196
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in South Africa
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageRestarting
Mine TypeOpen Pit & Underground
Commodities
  • Copper
  • Zinc
Mining Method
  • Truck & Shovel / Loader
  • Drift & Fill
  • Longhole open stoping
Mine Life12 years (as of Jan 1, 2020)
The Prieska Copper-Zinc Project (Prieska Project) continues to be the primary focus of the Company’s activities and is now in the financing and pre-development stage following the completion of an updated Bankable Feasibility Study (BFS) in the June 2020 Quarter (refer ASX / JSE release 26 May 2020). Updates to Environmental Permitting are being finalised and progress continues on the selection of the EPCM contractor. Preliminary site works have been completed in readiness for construction.
Latest NewsOrion signs definitive agreements for US$87 million funding for Prieska     December 13, 2022


Owners

Source: p. 10
CompanyInterestOwnership
BEE 30 % Indirect
Orion Minerals Ltd. 70 % Indirect
Ownership Tree
Orion indirectly holds the majority ownership of Repli (70%), with the balance held by Prieska Resources (Pty) Ltd (Prieska Resources) (20%), the Orion Siyathemba Community Trust (Community Trust) (indirectly 5%) and the Orion Siyathemba Employee Trust (Employee Trust)(indirectly 5%).

Prieska Resources has BEE entrepreneurial companies as its shareholders, namely, Safika Resources (Pty) Ltd (44.72%), Kolobe Nala Investment Company (Pty) Ltd (37.97%) and Black Star Minerals (Pty) Ltd (17.31%).

Contractors

Subscription required - Subscription is required.


Deposit Type

  • VMS


Summary:

The Prieska Deposit is a VMS-style deposit, with mineralisation defined along 2.4km of a northwest-southeast trending strike extent and down to a depth of 1.25km. Mineralisation of Cu, Zn, silver (Ag) and gold (Au) is in massive sulphides distributed as a persistent lens within gneiss rock assemblages.

Satellite deposit potential has been demonstrated with recent intersections of sulphide mineralisation at Ayoba, 5km from the proposed Prieska ore processing plant. Further afield, available historical data and recent exploration work by Orion has confirmed the existence of numerous follow-up massive sulphide Cu-Zn-rich targets within the nearby mineral tenements also held by Orion.

The mineralised zone outcrop has a strike of 2,400m, is oxidised and / or affected by leached and supergene enrichment to a depth of approximately 100m and crops out as a well- developed gossan. It has a dip of between 55° and 80° to the northeast at surface and a strike of 130° to the north. Current drilling indicates that the Deep Sulphides has a strike length of at least 2860m in depth.

The thickness of the mineralised zone exceeds 30m in places but averages between 7m and 9m. The mineralised zone persists to a depth of 1,100m (as deep as 1,228m in one section) after which it is upturned due to the folding.


Mining Methods

  • Truck & Shovel / Loader
  • Drift & Fill
  • Longhole open stoping


Summary:

Both underground and open pit mining are planned for the Foundation Phase. Underground mining is planned to commence on completion of mine dewatering, shaft refurbishment and underground infrastructure establishment, expected to be 27 months from Project approval. Underground mining is forecast to build up over 20 months to a steady-state run-of-mine production rate of 200 thousand tonnes per month (ktpm) or 2.4Mtpa. Open pit mining is planned after exhausting underground material at a production rate of 100ktpm.

Tunnel development remaining from the previous mining operations allows for early access to underground production mining areas. A combination of Longhole Open Stoping with Fill (LHOSF) and Drift-and-Fill (D&F) mining methods will be used, supported with paste back-filling. Some low-profile, D&F mining is planned in the latter years, along with open-pit mining of the near-surface +105 Level Supergene Deposit in the back two years of the mining plan.

The LoM plan contains 25.2Mt of material at an average grade of 1.0% Cu and 3.3% Zn from underground and 1.9% Cu and 2.4% Zn from the open pit. This is expected to produce 226kt of Cu and 680kt of Zn contained in differentiated concentrates. The updated LoM plan contains an additional 20% RoM material compared to the BFS-19 plan.


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsLOM
Copper Concentrate kt 1,125
Copper Metal in concentrate M lbs 498
Zinc Concentrate kt  ......  Subscription required
Zinc Metal in concentrate M lbs  ......  Subscription required
Zinc Equivalent Metal in concentrate t  ......  Subscription required
Copper Equivalent Metal in concentrate t  ......  Subscription required

Operational Metrics:

Metrics
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at April 30, 2020:
Deep Sulphide Resource bottom cut-off = 4% Equivalent Zn (Zn Eq = Zn% + (Cu%*2)); +105m Level Mineral
Resource bottom cut-off = 0.3% Cu. Mineral Resources stated at zero % cut-off.

CategoryOreTypeTonnage CommodityGradeContained Metal
Probable In-Situ (OP) 0.5 Mt Copper 1.5 % 7 kt
Probable In-Situ (UG) 14 Mt Copper 1 % 146 kt
Probable Total 14.5 Mt Copper 1.1 % 153 kt
Probable In-Situ (OP) 0.5 Mt Zinc 3.3 % 16 kt
Probable In-Situ (UG) 14 Mt Zinc 3.2 % 446 kt
Probable Total 14.5 Mt Zinc 3.2 % 462 kt
Probable In-Situ (OP) 0.5 Mt Copper Equivalent 2.3 % 11 kt
Probable In-Situ (UG) 14 Mt Copper Equivalent 1.8 % 248 kt
Probable Total 14.5 Mt Copper Equivalent 1.8 % 259 kt
Indicated In-Situ (OP) 624,000 t Copper 1.54 % 10,000 t
Indicated In-Situ (UG) 18,507,000 t Copper 1.17 % 217,000 t
Indicated Total 19,131,000 t Copper 1.18 % 227,000 t
Indicated In-Situ (OP) 624,000 t Zinc 3.05 % 19,000 t
Indicated In-Situ (UG) 18,507,000 t Zinc 3.6 % 667,000 t
Indicated Total 19,131,000 t Zinc 3.59 % 686,000 t
Inferred In-Situ (OP) 1,138,000 t Copper 1.4 % 17,000 t
Inferred In-Situ (UG) 10,219,000 t Copper 1.1 % 117,000 t
Inferred Total 11,357,000 t Copper 1.2 % 134,000 t
Inferred In-Situ (OP) 1,138,000 t Zinc 1.4 % 16,000 t
Inferred In-Situ (UG) 10,219,000 t Zinc 4.1 % 417,000 t
Inferred Total 11,357,000 t Zinc 3.8 % 433,000 t
Total Resource Total 30,488,000 t Copper 1.2 % 361,000 t
Total Resource Total 30,488,000 t Zinc 3.7 % 1,119,000 t

Commodity Production Costs:

CommodityAverage
All-in sustaining costs (sold) Zinc Equivalent  ......  Subscription required&nbs
All-in sustaining costs (sold) Copper Equivalent  ......  Subscription required&nbs
Assumed price Zinc  ......  Subscription required *
Assumed price Copper  ......  Subscription required *
* According to 2020 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2020
Combined mining costs ($/t milled) AUD 38 *
Processing costs ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
OP/UG OpEx $M AUD  ......  Subscription required
Processing OpEx $M AUD 373.7
G&A costs $M AUD 142.5
Total OpEx $M AUD  ......  Subscription required
Income Taxes $M AUD  ......  Subscription required
Royalty payments $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
Net revenue (LOM) $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 8% $M AUD  ......  Subscription required
After-tax NPV @ 8% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 6, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2020
................................... Subscription required 2019
Subscription required - Subscription is required.

News:

NewsDate
Orion signs definitive agreements for US$87 million funding for Prieska December 13, 2022

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.