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Australia
Mount Monger Operation (Aldiss Centre Mine, Daisy Centre Mine, Imperial/Majestic Mine, Mount Belches Centre Mine)

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 Location:
64 km SE from Kalgoorlie, Western Australia, Australia
  Address:
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
  • Costs & Financials
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole stoping
  • Longhole open stoping
Production Start...
The three independent and self-sufficient Mining Centres at Mount Monger are the Daisy Complex, Mount Belches and Aldiss Mining Centres. These Mining Centres feed the 1.3Mtpa Randalls processing facility.

Owners

Source: p. 69,71
CompanyInterestOwnership
Silver Lake Resources Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Orogenic
  • Vein / narrow vein
  • Banded iron formation

Summary:

DAISY COMPLEX
The deposit type is classified as an orogenic gold deposit within the Norseman-Wiluna greenstone sequence. The accepted interpretation for gold mineralisation is related to (regional D2-D3) deformation of the stratigraphic sequence during an Archaean orogeny event.

Locally, the mineralisation is characterised as a deformed vein, hosted within intermediate volcanic and volcaniclastic units and closely associated with felsic intrusive rock types of the Gindalbie Terrane. The metamorphic grade is defined as lower green-schist facies.

The Daisy Complex resource extents are 2,200m strike, 800m across strike and 1,308m down dip and open at depth. These extents host approximately 74 known ore zones (ore domains).

MOUNT BELCHES CENTRE
MAXWELLS
The Maxwells deposit is hosted within the lower ‘Maxwells’ member. 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, which 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 ........

Mining Methods

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

Summary:

DAISY CENTRE
The Daisy Complex production sourced from Haoma West, Lower Prospect, Easter Hollows and remnant mining areas. The Easter Hollows zone provides a shallower mining front and a significant exploration opportunity, with 1,000 metres of known plunge extent and improved drill access to target infill and extensional opportunities. In FY23, ore from the Daisy Mining Centre will continue to be sourced from Haoma West, Lower Prospect and the Easter Hollows lodes.

Mining at Daisy Complex utilizes a single boom jumbo for ore development and longhole stoping between sill drives.

All stope panels are assumed to have a minimum width of 2.4m and variable dilution is added at 0.0 g/t when mining each stoping block.

The mining methods employed in the study are mechanised development, longhole stoping and airleg mining which are all currently utilised at the mine.

Major assumption made for optimisation parameters include minimum stoping widths of 2.4m and maximum stope height of 15m.

Minimum mining width parameters for handheld and mechanised mining were set at 2.4 metres, based on current experience at the Daisy Complex. An additional 20% dilution factor is then applied.

Mining recovery factor of 80% was applied to account for ore loss in pillars and unplanned ore loss.

Infrastructure to support mining operations is already in place at the Daisy Complex.

MOUNT BELCHES CENTRE
Mining ........

Crushing and Grinding

Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required157,936135,837131,109
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required1,419,100 t1,269,722 t1,306,508 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required1,229,195 t1,256,120 t1,300,152 t
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1.3 Mt1.3 Mt1.3 Mt
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Reserves at June 30, 2022:
Daisy Centre
The adopted cut-off grades 1.0 g/t (less than 100m depth from surface) and 2.0 g/t (more than 100m depth from surface) for reported mineral resource.

Mount Belches Centre
The adopted cut-off grades 1.0 g/t and 2.0 g/t for reported mineral resource. A reserve cut-off grade of 3.0g/t (MAXWELLS). A reserve cut-off grade of 2.8g/t (COCK-EYED BOB). A reserve cut-off grade of 2.0g (SANTA).

Aldiss Centre
Mineral Resources: cut-off of 1.00 g/t. Ore Reserves: cut-off grade of 2.0g/t for underground the Tank South.

CategoryTonnage CommodityGradeContained Metal
Proven 3,239 kt Gold 1.3 g/t 139 koz
Probable 6,824 kt Gold 2.1 g/t 453 koz
Proven & Probable 10,064 kt Gold 1.8 g/t 592 koz
Measured 4,150 kt Gold 2.5 g/t 329 koz
Indicated 20,077 kt Gold 3 g/t 1,924 koz
Inferred 9,623 kt Gold 4.4 g/t 1,369 koz
Total Resource 33,850 kt Gold 3.3 g/t 3,622 koz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Credits (by-product) Gold AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -5 / oz   -6 / oz  
All-in sustaining costs (sold) Gold AUD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,289 / oz†   1,359 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units202220212020201920182017
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 255.6   227.5  
EBITDA M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 87.9   70  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 7, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Jul 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Quarterly Report 2022
Year-end Mineral Reserves 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
Annual Report 2018
Quarterly Report 2018
Annual Report 2017
Corporate Presentation 2017
Quarterly Report 2017
Quarterly Report 2016
Quarterly Report 2015
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