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Australia
Daisy Centre (Mount Monger Operation)

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 Location:
50 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
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole stoping
Processing
  • Gravity separation
  • Intensive Cyanidation Reactor (ICR)
  • Centrifugal concentrator
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
The Daisy Complex production sourced from Haoma West, Lower Prospect, Easter Hollows and remnant mining areas. In FY22, ore from the Daisy Mining Centre will continue to be sourced from Haoma West and Lower Prospect lodes.
Latest NewsSilver Lake halts operations at Daisy Complex     June 10, 2021


Owners

Source: p. 38
CompanyInterestOwnership
Silver Lake Resources Ltd. 100 % Indirect
The mining operations for Daisy Complex occurs on these granted Mining Leases – M26/129, M26/251, M26/38, M26/389, M26/825 and are held by Silver Lake Resources Limited.

Deposit Type

  • Orogenic
  • Vein / narrow vein


Summary:

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, 700m across strike and 1,200m down dip and open at depth. These extents host approximately 78 known ore zones (ore domains).


Mining Methods

  • Longhole stoping


Summary:

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.

Major assumption made for optimisation parameters include minimum stoping widths of 2.4m and maximum stope height of 15m. Minimum mining width parameters for hand held 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.


Crushing and Grinding


Processing

  • Gravity separation
  • Intensive Cyanidation Reactor (ICR)
  • Centrifugal concentrator
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Daisy Complex feeds the 1.3Mtpa Randalls mill.

Reasonable assumptions for metallurgical extraction are based on metallurgical processing the Daisy Complex ore through the Randalls (CIL) process facility. The current recoveries for gold are greater than 94%.

Recoveries & Grades:

CommodityParameter20212020201920182017
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required  ......  Subscription required6.47

Production:

CommodityUnits20212020201920182017
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required68,03367,106
All production numbers are expressed as metal in ore.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required298,357 t328,941 t300,201 t
Subscription required - Subscription is required.

Reserves at June 30, 2021:
Cut-off parameters are 2.0 g/t Au for resource reporting.

CategoryTonnage CommodityGradeContained Metal
Proven 94 kt Gold 8.1 g/t 25 koz
Probable 344 kt Gold 8.8 g/t 98 koz
Proven & Probable 438 kt Gold 8.7 g/t 122 koz
Measured 582 kt Gold 6.7 g/t 125 koz
Indicated 2,425 kt Gold 6.3 g/t 492 koz
Inferred 3,017 kt Gold 8.1 g/t 790 koz
Total Resource 6,024 kt Gold 7.3 g/t 1,406 koz


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 23, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 23, 2021
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Jul 23, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 23, 2021
....................... Subscription required ....................... Subscription required Subscription required Oct 23, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Quarterly Report 2018
Annual Report 2017
Quarterly Report 2017
Annual Report 2015
Other 2015
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News:

NewsDate
Silver Lake halts operations at Daisy Complex June 10, 2021

Aerial view:

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