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Australia
Mt Magnet Operation (Penny Project, Vivien Mine)

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 Location:
Mount Magnet, Western Australia, Australia

  Address:
Gold Operation Mount Magnet
PO Box 83
Mount Magnet
Western Australia, Austria
6638
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
Processing
  • Calcining
  • Smelting
  • Centrifugal concentrator
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life2024
The Mount Magnet project consists of numerous open pit and underground mines plus exploration targets situated on established mining and prospecting leases. The total project area covers 225km².

The Mt Magnet is a multi pit / underground operation: four open pit (Milky Way, Stellar, Eridanus, Vegas, and four underground projects (Shannon, Water Tank Hill, Hill 60, Vivien).

The economic indicators of Mt Magnet and Vivien were merged in 2019 fiscal year.
Latest NewsMACA picks up $130m Ramelius contract extension     July 22, 2020


Owners

Source: p. 14
CompanyInterestOwnership
Ramelius Resources Ltd. (operator) 100 % Indirect
Mineral tenement and land tenure status is 100% owned by Mt Magnet Gold Pty Ltd, a wholly owned subsidiary of RMS.

Deposit Type

  • Porphyry
  • Banded iron formation hosted


Summary:

The Mt Magnet project is located within the north-south striking Meekatharra-Mt Magnet greenstone belt of the Western Australian Murchison Province. The greenstone belt lithologies comprise a succession of steeply dipping and intensely deformed plus interlayered mafic and ultramafic extrusive and intrusive rocks, felsic volcanics and banded iron formations (BIF). Granitic rocks intrude the greenstone belt stratigraphy.

Banded iron formations are the dominant host rocks for gold mineralisation in the project. Gold mineralisation is typically associated the pyrite & pyrrhotite replacement of magnetite in the banded iron. High-grade ore shoots are developed along the intersection of the BIF and a swarm of northeast trending faults, colloquially referred to as Boogardie Breaks.

Significant gold mineralisation is also found in porphyritic felsic units of the Boogardie Basin. Mineralisation generally occurs as a stockwork style of sericite-silica-pyrite veining and alteration within felsic porphyry units intruded into ultramafic flow sequences. Gold mineralisation tends to occur along felsic margins adjacent to the ultramafic contact. The Cosmos area consists of this style.


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping


Summary:

The Mt Magnet is a multi pit / underground operation: four open pit (Milky Way, Stellar, Eridanus, Vegas, and four underground projects (Shannon, Water Tank Hill, Hill 60, Vivien).

Galaxy, Eridanus, Morning Star and most Mt Magnet deposits are modelled as open pit deposits. Factors include potential pit depths, minimum mineralisation widths and economic cutoffs based on current contract mining equipment and milling facilities.

UG deposits, including Hill 60, Shannon, Vivien are modelled with consideration of extraction by conventional sub-level open stoping methods.

As part of the Vivien mine life extension, the mining contractor was changed to RUC Cementation Mining. Vivien Underground Extended to June 2021.

Ramelius contracts MACA for the open pits and Byrnecut Australia for the underground mines.

MACA began works on the Mount Magnet Gold Project in 2017 for Ramelius Resources. The project extension consists of open pit mining services including drilling & blasting, and loading and hauling.


Crushing and Grinding


Processing

  • Calcining
  • Smelting
  • Centrifugal concentrator
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Concentrate leach
  • Carbon in leach (CIL)
  • Carbon in pulp (CIP)
  • Carbon adsorption-desorption-recovery (ADR)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Mt Magnet processing plant is a conventional CIL/CIP gold plant with single stage crushing, primary SAG milling in closed-circuit with a pebble crusher, and secondary closed-circuit ball milling. A centrifugal style gravity gold recovery circuit operates on a portion of the secondary milling product hydrocyclone underflow. Gravity gold concentrate is intensively leached. Cyanide leaching on the classified mill product is undertaken through two large, agitated leach tanks, two large, agitated adsorption tanks and three (of six) older Pachuca style (air agitated) adsorption tanks. Leach kinetics are improved through the addition of oxygen through the first leach tank stages of the circuit. Gold is eluted from the loaded activated carbon, it is then electrowon, calcined and smelted into gold doré as is standard practice.

Recoveries & Grades:

CommodityParameter2020201920182017
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required94.391
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required2.231.42

Production:

CommodityUnits20212020201920182017
Gold oz  ......  Subscription required ^ *  ......  Subscription required  *  ......  Subscription required  *135,597  *66,073
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
* Combined production for Mt Magnet Operation and Vivien Mine
Subscription required - Subscription is required.

Operational Metrics:

Metrics2020201920182017
Ore tonnes mined  ......  Subscription required2,338 kt1,208 kt
Tonnes milled  ......  Subscription required1,962 kt1,742 kt1,574,617 t
Annual milling capacity  ......  Subscription required2 Mt2 Mt1.8 Mt
Subscription required - Subscription is required.

Reserves at June 30, 2020:
Mt Magnet - open pits cut-off 0.6 g/t, selective UG cut-off 3.5 g/t, bulk UG cut-off grade 2.0 g/t.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 4,000,000 t Gold 0.7 g/t 95,000 oz
Proven In-Situ (OP) 91,000 t Gold 1.1 g/t 3,200 oz
Proven In-Situ (UG) 190,000 t Gold 5.9 g/t 36,000 oz
Proven Total 4,280,000 t Gold 1 g/t 134,000 oz
Probable In-Situ (OP) 5,700,000 t Gold 1.5 g/t 270,000 oz
Probable In-Situ (UG) 470,000 t Gold 3.7 g/t 55,000 oz
Probable Total 6,170,000 t Gold 1.7 g/t 330,000 oz
Proven & Probable Stockpiles 4,000,000 t Gold 0.7 g/t 95,000 oz
Proven & Probable In-Situ (OP) 5,790,000 t Gold 1.5 g/t 273,000 oz
Proven & Probable In-Situ (UG) 660,000 t Gold 4.3 g/t 91,000 oz
Proven & Probable Total 10,450,000 t Gold 1.4 g/t 460,000 oz
Measured Stockpiles 4,000,000 t Gold 0.7 g/t 95,000 oz
Measured In-Situ (OP) 790,000 t Gold 1.7 g/t 4,300 oz
Measured In-Situ (UG) 610,000 t Gold 5.8 g/t 110,000 oz
Measured Total 5,400,000 t Gold 1.4 g/t 250,000 oz
Indicated In-Situ (OP) 21,000,000 t Gold 1.6 g/t 1,000,000 oz
Indicated In-Situ (UG) 1,400,000 t Gold 6.6 g/t 310,000 oz
Indicated Total 22,400,000 t Gold 1.9 g/t 1,310,000 oz
Inferred In-Situ (OP) 16,000,000 t Gold 1.3 g/t 700,000 oz
Inferred In-Situ (UG) 2,600,000 t Gold 3.6 g/t 300,000 oz
Inferred Total 18,600,000 t Gold 1.6 g/t 1,000,000 oz
Total Resource Stockpiles 4,000,000 t Gold 0.7 g/t 95,000 oz
Total Resource In-Situ (OP) 38,000,000 t Gold 1.5 g/t 1,743,000 oz
Total Resource In-Situ (UG) 4,700,000 t Gold 4.8 g/t 720,000 oz
Total Resource Total 46,700,000 t Gold 1.7 g/t 2,600,000 oz

Commodity Production Costs:

CommodityUnits2020201920182017
All-in sustaining costs (sold) Gold AUD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold AUD 1,300 / oz 1,250 / oz
C1 cash costs Gold AUD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units202120202019
Capital expenditures (planned) M AUD  ......  Subscription required
Sustaining costs M AUD  ......  Subscription required
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required
Revenue M AUD  ......  Subscription required  ......  Subscription required
Gross profit M AUD  ......  Subscription required  ......  Subscription required
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required
After-tax Income M AUD  ......  Subscription required  ......  Subscription required
EBIT M AUD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 25, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Annual Report 2017
Corporate Presentation 2017
Other 2017
Subscription required - Subscription is required.

News:

NewsDate
MACA picks up $130m Ramelius contract extension July 22, 2020

Aerial view:

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