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Australia
Mount Belches Centre (Mount Monger Operation)

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 Location:
75 km SE from Kalgoorlie, Western Australia, Australia

  Regional Office:
PO Box 750
Kalgoorlie
Western Australia, Australia
6433
Phone  ...  Subscription required
Fax+61-8-9024-2013
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
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  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole open stoping
Processing
  • Intensive Cyanidation Reactor (ICR)
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
The Mount Belches Mining Centre is a fully serviced, independent Mining Centre located 18km from the Randalls mill and currently comprises the shallow, high-grade Maxwells and Cock-eyed Bob underground mines.


Owners

Source: p. 66
CompanyInterestOwnership
Silver Lake Resources Ltd. 100 % Indirect

Deposit Type

  • Banded iron formation hosted


Summary:

The Cock-eyed Bob is hosted within the upper ‘Santa Clause’ member of the Banded Iron Formation (BIF) of the Mount Belches group. The Mount Belches group is located in the southern Eastern Goldfields Superterrane, Yilgarn Craton, Western Australia.

The iron formation is a silicate/oxide-facies unit with over printing sulphides, and has undergone metamorphism (upper-greenschist facies) and deformation (two generations of folds). The gold deposits are hosted in both the hinge zone and along the limbs of a regional scale, chevron folded BIF package.

Gold dominantly occurs as inclusions of native gold and/or electrum within or around pyrrhotite, magnetite, and arsenopyrite, and economic mineralisation is typically restricted to the BIF horizons.

The ‘Flora Dora’ deposit is hosted within the lower ‘Maxwells’ member of the Mount Belches group and the ‘Santa’ deposit is hosted within the upper ‘Santa’’ member both members are located in the southern Eastern Goldfields Superterrane, Yilgarn Craton, Western Australia.

• Gold dominantly occurs as inclusions of native gold and/or electrum within or around pyrrhotite, magnetite, and arsenopyrite, and economic mineralisation is typically restricted to the BIF horizons.


Mining Methods

  • Longhole open stoping


Summary:

The Mount Belches mining centre is located 18km from the Randalls Mill and currently comprises the Maxwells and Cock-eyed Bob underground mines.

For Cock-eyed Bob Mechanised Longhole Open Stoping has been adopted as the primary stoping method and to minimise potential dilution, levels have been planned at 16 metre intervals. Ore strike driving will be performed with a single boom jumbo to a nominal dimension of 2.5 metres wide and 3 metres high.

Ore production at Maxwells underground commenced in October 2017, contributing 12,024 tonnes at a grade of 3.3 g/t Au for 1,271 contained ounces. Production for the quarter was sourced from ore development headings with long hole stoping activities scheduled to commence in Q3 FY17.

Santa Area - open pit mining activities completed in Q1 FY2017 with exploration drilling supporting the potential for a new underground mine.


Crushing and Grinding


Processing

  • Intensive Cyanidation Reactor (ICR)
  • Gravity separation
  • Agitated tank (VAT) leaching
  • Carbon in pulp (CIP)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

All ore from the Mount Monger Operation is processed through the 1.3 mtpa Randalls facility, located 65 km south east of Kalgoorlie and is 15 km from the Daisy Complex.

Gold recovery consists of both a gravity circuit containing two gravity concentrators an intensive cyanidation unit and hybrid CIP circuit comprising two leach tanks and six adsorption vessels. Gold is stripped from the loaded using a pressure Zadra type elution circuit consisting of two elution columns and the gold is subsequently recovered from the cathodes of the gravity and electrowinning cells.

Recoveries & Grades:

CommodityParameter20202019
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required

Production:

CommodityUnits20212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required4526
All production numbers are expressed as metal in ore. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2020:

CategoryTonnage CommodityGradeContained Metal
Proven 219 kt Gold 4.8 g/t 34 koz
Probable 1,457 kt Gold 3.9 g/t 182 koz
Proven & Probable 1,676 kt Gold 4 g/t 215 koz
Measured 580 kt Gold 6.4 g/t 119 koz
Indicated 8,889 kt Gold 3.2 g/t 920 koz
Inferred 4,457 kt Gold 3.1 g/t 445 koz
Total Resource 13,926 kt Gold 3.3 g/t 1,484 koz


Heavy Mobile Equipment:

Mine Management:

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


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Quarterly Report 2018
Annual Report 2017
Press Release 2017
Quarterly Report 2017
Quarterly Report 2016
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Aerial view:

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