Australia

Tomingley Gold Operations

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Overview

Mine TypeUnderground
StatusActive
Commodities
  • Gold
Mining Method
  • Longhole open stoping
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SnapshotThe Tomingley Gold Operations (TGO) is an open pit and underground mining development with a 1 Mtpa processing facility (approved expansion to 1.75Mtpa). The mine is based on the extraction and treatment of ore from underground operations and remnant stockpiles from open cut mining operations. Previous open pits – Caloma, Caloma Two, Wyoming One and Wyoming Three had been completed to economic limits by June 2019. The cut back of the Caloma One pit was completed during FY23.

At TGO, open pit mining ceased in 2023 and the operation transitioned to fully underground mining at Wyoming One, Caloma One and Caloma Two.

Alkane intends to extend gold mining operations at Tomingley to include the San Antonio and Roswell (SAR) resources immediately south of the existing mine. The project involves development of an underground mine at Roswell and one large open cut pit.

At the Roswell deposit the first stope was blast in April 2024.
Related AssetTomingley Gold Extension Project

Owners

SourceSource
CompanyInterestOwnership
Alkane Resources Ltd. 100 % Indirect
Tomingley Gold Operations Pty Ltd. (operator) 100 % Direct
Tomingley Gold Operations Pty Ltd is wholly-owned subsidiary of Alkane Resources Ltd.

Deposit type

  • Porphyry
  • Vein / narrow vein

Summary:

Tomingley Deposits
Mineralisation is associated with quartz veining and alteration focused within sub-volcanic basaltic-andesite sills and adjacent volcaniclastic sediments. The deposits appear to have formed as the result of a rheological contrast between the porphyritic sub-volcanic sills and the surrounding volcaniclastic sediments, with the sills showing brittle fracture and the sediments ductile deformation, and have many similarities to well documented orogenic - lodestyle gold deposits.

Wyoming One
Mineralisation at Wyoming One is developed within a number of different zones which have been domained based on the geology, style of mineralisation and continuity of high mineralisation that can be separated:

* Porphyry – mineralisation hosted by a quartz stockwork within the carapace of a sub-volcanic sill with dimensions roughly 60m x 150m. High grade mineralisation is developed along the eastern and northern contact of the sediment and porphyry. This High Grade mineralisation on the contact has been domained separately for the estimation and is currently referred known as the “High Grade 101 porphyry lode” mentioned below. Within the main porphyry body there are several internal mineralised stacked lodes that dip 45° to the NE. These structures were evident from the close spaced open pit RC Grade control drilling. Underground Diamond drilling has confirmed these stacked lodes and the targeting and defining of more internal porphyry mineralised structures will be a focus as mining continues.

* Hangingwall – a linear zone of mineralisation situated approximately 30m to hanging wall of the ‘porphyry’ mineralisation and hosted within quartz veins within silicified fine grained sediments and a brecciated carbonaceous mudstone. This zone is lithologically constrained with these fine grained sediment package which folds around the northern end of the porphyry;

* High Grade 101 Porphyry Lode”’ –This zone was previously known as the ‘376” structure interpreted to be a bounding structure and primary fluid conduit. This High Grade zone of mineralisation is developed at the eastern and northern contact of the porphyry and incorporates some of the contact metasediments which were impacted by the mineralisation.

* Footwall – a low grade zone located in a similar stratigraphic position to the hangingwall zone but footwall to the porphyry.

Caloma
Mineralisation at Caloma is developed within a series of stacked ‘quartz lodes’ which dip shallowly to the west and hosted dominantly within the sub-volcanic sills. The lodes are cross cut by a number of barren post mineralisation dolerite dykes.

Caloma Two
Mineralisation at Caloma Two is developed within a series of ‘quartz lodes’ which dip north at flat to moderate angles and hosted dominantly within the sub-volcanic sills. Mineralisation is also developed along a sediment contact zone which appears to be a potential linking structure with the Caloma mineralisation to the north. There is also evidence for the development of an inverted saddle reef at depth. The lodes are cross cut by a number of post mineralisation dolerite dykes.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityUnits202420232022202120202019201820172016
Gold oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe48,96978,53368,83667,812
^ Guidance / Forecast.

Operational metrics

Metrics20232022202120202019201820172016
Plant annual capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1 Mt1 Mt1 Mt
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe400,187 t1,589,811 t1,222,868 t1,285,454 t
Waste OP  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Total tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe804,016 bcm3,755,265 bcm8,140,469 bcm
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe998,702 t1,092,602 t1,087,983 t1,096,105 t
Stripping / waste ratio  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe4.5 5.4 16.6 12.2
Waste OP+UG  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe657,648 bcm3,165,414 bcm7,679,110 bcm6,199,820 bcm

Production Costs

CommodityUnits20242023202220212020201920182017
All-in sustaining costs (sold) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 946 / oz   1,002 / oz   1,335 / oz  
C1 cash costs (sold) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 748 / oz   767 / oz   1,127 / oz  
^ Guidance / Forecast.

Financials

Units2023202220212020201920182017
Revenue M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 92.5   128.8   117.3  
Pre-tax Income M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 31.9   38.6   17.1  

Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNameProfileRef. Date
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EmployeesContractorsTotal WorkforceYear
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Aerial view:

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