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Australia
Geko Mine

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 Location:
24 km NW from Coolgardie, Western Australia, Australia

  Regional Office:
23 Altona Street
West Perth
Western Australia, Australia
6005
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  • Overview
  • Owners
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Carbon in pulp (CIP)
Latest NewsCoolgardie Minerals enters voluntary administration     March 4, 2019


Owners & OPERATOR

Source:
CompanyInterestOwnership
SMS Mining Services (operator)
Coolgardie Minerals Ltd. 100 % Direct
The primary focus of the company is the Bullabulling Gold Project (BGP) in Western Australia, in which it holds 100% interest.

Deposit Type

  • Sedimentary


Summary:

The deposit occurs within mafic lithologies which have been altered and deformed to a sericite-quartzbiote-hornblende schist. This schistose unit directly overlies an ultramafic sequence and gold mineralisaon is hosted within a shear zone formed at or near the contact which is dipping 60° to the south. The mineralisaon orientaon within this package dips approximately 45°south. Deep weathering has produced a laterite profile to approximately 80m depth and includes supergene enriched mineralised zones. Overlying the weathered basement rocks is a 10 20m thick transported alluvium horizon which underlies a layer of un-mineralised Cainozoic sediments. Re-interpretaon of the Geko gold deposit by Mining Plus resulted in the idenficaon of two discrete zones in the main area of mineralisaon called the Main Zone and Hangingwall Zone which are host to the majority of the mineralisaon. The Main Zone extends from the underlying fresh material into the weathered zone above and has a small supergene enriched gold zone at the top. The Hangingwall Zone isolates a local high-grade zone on the
hangingwall contact. There are also mulple small mineralised zones of varying size located within the weathering profile. In addion, there is a zone of high-grade mineralisaon that either abuts the base of an alluvium horizon or detaches and runs through the moled clay material beneath the alluvial zone.

The Geko deposit occurs within mafic lithologies which have been altered and deformed to a sericitequartz-biote-hornblende schist. This schistose unit directly overlies an ultramafic sequence and gold mineralisaon is hosted within a shear zone formed at or near the contact which is dipping 6 0° to the south. The mineralisaon orientaon within this package dips approximately 45°south. Deep weathering has produced a laterite profile to approximately 80m depth and includes supergene enriched mineralised zones. Overlying the weathered basement rocks is a 10 20m thick transported alluvium horizon which underlies a layer of un-mineralised Cainozoic sediments. A total 744 holes comprised the Geko drillhole database and, of these, 566 holesfor 38,194m were used to create a stragraphic model, with of 211 holes used for the Mineral Resource esmate, including 35 air-core holes, 20 diamond holes and 156 RC holes. Geological interpretaon
of 12 mineralisaon wireframes using a 0.5 g/t Au cut-off grade was used to constrain interpolaon of composited drillhole assay grades into a block model.


Mining Methods

  • Truck & Shovel / Loader


Summary:

CM1 has based its mining studies of the Geko Mineral Resource on a simple open-cut pit operaon, ulising contractors for mining, with mined ore transported to an offsite gold processing plant for toll milling by a third party. It is envisaged that toll milling could be undertaken at the Lakewood processing plant situated approximately 78 km by road from the mine site.


Crushing and Grinding


Processing

  • Carbon in pulp (CIP)

Source: Subscription required

Summary:

Ore processing costs and recoveries have been determined based on Geko ore being toll milled, using a contracted ore treatment facility to recover gold for an agreed cost. The exisng currently operang Lakewood gold processing facility (Lakewood), owned and operated by GMM is ancipated under the FS to be used to process the Geko ore. This mill has a capacity of approximately 0.75 Mt/a or 95–100 tonnes per hour (t/hr) and is located approximately 5 km southeast of the township of Kalgoorlie.

Lakewood uses subcontracted crushing services to crush run of mine ore down to less than 20 mm in size. The grinding circuit is comprised of a single grate discharge ball mill in closed circuit with a set of hydrocyclones. All of the mill discharge is screened at approximately 2 mm, with the +2 mm fracon reporng back to the mill feed while the -2 mm is fed to two 30” Knelson centrifugal concentrators. The cyclone overflow from the grinding circuit is screened to remove trash and then repor ........



Reserves at December 1, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven 1,238 kt Gold 1.69 g/t 67.3 koz
Probable 340 kt Gold 2.25 g/t 24.6 koz
Proven & Probable 1,578 kt Gold 1.81 g/t 91.9 koz
Measured 1,745 kt Gold 1.6 g/t 89 koz
Indicated 690 kt Gold 1.7 g/t 37 koz
Inferred 120 kt Gold 2.6 g/t 10 koz


Proposed Heavy Mobile Equipment as of December 31, 2018:
HME TypeModelQuantity
Excavator ....................... Subscription required 3
....................... Subscription required ....................... Subscription required 10
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 27, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 27, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
................................... Subscription required 2018
Subscription required - Subscription is required.

News:

NewsDate
Coolgardie Minerals enters voluntary administration March 4, 2019
Coolgardie starts production at Geko gold project November 5, 2018

Aerial view:

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