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Australia
McArthur River Mine

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 Location:
716 km SE from Darwin, Northern Territory, Australia

  Regional Office:
34A Bishop St
PO Box 36821 Winnellie NT 0821
Winnellie
Northern Territory, Australia
0820
Phone  ...  Subscription required
Fax61-(8)-89758170
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Hot Acid Leach
  • Crush & Screen plant
  • Flotation
  • Dense media separation
Mine Life2039
Latest NewsGlencore gets green light at McArthur River     November 20, 2020


Owners & OPERATOR

Source: p. 228
CompanyInterestOwnership
Glencore plc. 100 % Indirect
McArthur River Mining Pty Ltd. (operator) 100 % Direct

Deposit Type

  • Sediment-hosted


Summary:

The McArthur River lead-zinc-silver deposit of northern Australia is the largest known stratiform sediment-hosted base-metal deposit.

Zinc-lead-silver mineralisation occurs predominantly as ultra-fine bedded parallel sphalerite and galena rich bands hosted by dolomitic and carbonaceous pyritic siltstones, graded beds and chaotic debris flow breccia.

?The mineralisation area of the 'Here's Your Chance' deposit covers around two square kilometres and is 55 metres thick. It comprises eight recognisable and discrete zinc and lead ore zones.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The open pit excavation is being undertaken in six stages, with the first three targeting the shallowest ore. Conventional drilling, blasting, loading and haulage methods are used.

After blasting, the overburden is excavated in horizontal benches to expose the target ore, which we then remove for processing. Separating the ore and waste at the mining stage ensures a relatively pure ore is fed to the processing plant.

Excavators with up to 550 tonne capacity load 175-220 tonne haul trucks with ore or waste to be taken to stockpiles or the waste rock piles. The majority of the overburden rock from the open pit is stored at the North Overburden Emplacement Facility, or waste rock pile.


Crushing and Grinding


Processing

  • Hot Acid Leach
  • Crush & Screen plant
  • Flotation
  • Dense media separation

Flow Sheet: Subscription required

Summary:

Refining the ore:
Ore is trucked from the open pit to the processing plant where it goes through three stages of crushing and screening, pre-concentration via heavy media separation followed by flotation, oxidative leaching and dewatering.

Crushing:
The ore is crushed down to rock sizes of 9 mm through three stages of crushing commencing with a jaw crusher, followed by secondary and tertiary crushing using cone crushers. After crushing, low grade ore moves through to the Heavy Medium Plant to upgrade the ore to the target process feed grades while high grade ore moves directly through to the primary grinding stage.

Primary grinding:
The ore then moves through a primary grinding circuit at a rate of around 550 tonnes per hour. This circuit consists of a 4 megawatt SAG Mill operating in open circuit followed by a 11.5 megawatt Ball Mill running in closed circuit with hydrocyclones. Through this circuit, the ore is slurried with recycled process water ........

Recoveries & Grades:

CommodityParameter2018
Zinc Head Grade, % 9.6
Lead Head Grade, % 4.3
Silver Head Grade, g/t 45

Production:

CommodityUnits20192018201720162015
Zinc kt  ......  Subscription required  ......  Subscription required210200273
Lead kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2018
Ore tonnes mined  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGrade
Proven 71 Mt Zinc 9.5 %
Proven 71 Mt Lead 4.3 %
Proven 71 Mt Silver 42 g/t
Probable 27 Mt Zinc 8 %
Probable 27 Mt Lead 4 %
Probable 27 Mt Silver 42 g/t
Proven & Probable 98 Mt Zinc 9.1 %
Proven & Probable 98 Mt Lead 4.2 %
Proven & Probable 98 Mt Silver 42 g/t
Measured & Indicated 163 Mt Zinc 9.8 %
Measured & Indicated 163 Mt Lead 4.4 %
Measured & Indicated 163 Mt Silver 45 g/t


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 23, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 11, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 11, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 11, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 11, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 11, 2020
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Annual Review 2017
Fact Sheet 2017
Annual Report 2016
Annual Review 2016
Other 2003
Subscription required - Subscription is required.

News:

NewsDate
Glencore gets green light at McArthur River November 20, 2020

Aerial view:

Subscription required - Subscription is required.

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