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Australia
Tomingley Gold Operations

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 Location:
53 km SW from Dubbo, New South Wales, Australia

  Address:
Tomingley West Road
PO Box 59 PEAK HILL NSW 2869
Tomingley
New South Wales, Australia
2869
Phone  ...  Subscription required
Fax+61-2-6882-9282
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole open stoping
Processing
  • Gravity separation
  • Counter current decantation (CCD)
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life2022
The four open cut pits at Tomingley are:
Wyoming One (completed 2019), Wyoming Three (completed 2015), Caloma One (completed 2017) and Caloma Two (completed 2019).

Underground mining development commenced in 2019.
Latest NewsAlkane amps up gold production guidance     January 20, 2021


Owners & OPERATOR

Source: p. 12, 73
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:

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.

Mineralisation at Wyoming One is developed within a number of different zones:

- porphyry – mineralisation hosted by a quartz stockwork within the carapace of a subvolcanic sill with dimensions roughly 60m x 150m. High grade mineralisation is developed along the eastern contact of the zone (‘contact’ zone);

- hangingwall – a linear zone of mineralisation situated approximately 30m to hangingwall of the ‘porphyry’ mineralisation and hosted within silicified and brecciated carbonaceous mudstone. This zone is interpreted to fold around the northern end of the porphyry (northern zone);

- ‘376’ – east west zone of high grade mineralisation developed at the northern contact of the porphyry. Interpreted to be a bounding structure and primary fluid conduit. Other high grade east-west structures e.g. ‘831’ appear to be developed en-echelon and to the south of the ‘376’ zone;

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

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.


Mining Methods

  • Longhole open stoping


Summary:

Open cut mining at TGO commenced in 2014, based on four gold deposits: Wyoming One, Wyoming Three, Caloma One and Caloma Two.

Following the completion of the Wyoming Three and Caloma One open cuts in 2015 and 2017 respectively, mining in the Wyoming One and Caloma Two open cuts ceased in the 2019 financial year. An underground mine is under development at the Wyoming One deposit, with stope ore extraction anticipated later in 2019.

Alkane is also undertaking major gold exploration activities in the gold corridor between Tomingley and Peak Hill as part of a project to identify additional resources for processing at TGO.

The operation continued to perform very well as open cut mining wound to a close: mining in the Wyoming One open cut finished in December 2018 and in Caloma Two in January 2019. Medium and low-grade ore stockpiles were then processed for the balance of the financial year, enabling gold production to continue at the design feed rate of 1Mtpa. Once processing of low-grade stockpiles is finished, gold production will revert to underground ore, most likely in early 2020.

Alkane’s Board approved the development of underground operations in September 2018. These works commenced in January 2019 and continue on schedule and on budget. The main portal is located at the base of the Wyoming One open cut, with the decline spiralling down outside the ore zone past several ore levels. Production of ore from the first underground stope is scheduled before the end of calendar year 2019. TGO has recruited a team of experienced personnel in preparation for underground ore production. The original mine plan is to extract 1.24Mt of ore with grading 2.7g/t gold, for a resultant 108,000 ounces of gold.


Crushing and Grinding


Processing

  • Gravity separation
  • Counter current decantation (CCD)
  • Concentrate leach
  • Agitated tank (VAT) leaching
  • Carbon in leach (CIL)
  • Elution
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Tomingley Gold Operations processing plant utilises two stage crushing, single stage grinding and a gravity/CIL gold recovery circuit. The plant has a designated throughput of 1.25mtpa of oxide ore and 1.0mtpa of fresh (sulphide) ore. The plant has been operational since February 2014.

Recoveries & Grades:

CommodityParameter2019201820172016
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 1.662.422.152.08
Subscription required - Subscription is required.

Production:

CommodityUnits2019201820172016
Gold oz  ......  Subscription required  ......  Subscription required68,83667,812
Subscription required - Subscription is required.

Operational Metrics:

Metrics2019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required1,285,454 t
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required6,199,820 bcm
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required1,096,105 t
Stripping / waste ratio  ......  Subscription required  ......  Subscription required  ......  Subscription required12.2
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (UG) 45 kt Gold 2.7 g/t
Proven In-Situ (OP) 677 kt Gold 0.7 g/t
Proven Total 722 kt Gold 1.8 g/t
Probable In-Situ (UG) 688 kt Gold 3.2 g/t
Probable Total 688 kt Gold 1.9 g/t
Proven & Probable In-Situ (UG) 732 kt Gold 3.1 g/t 74 koz
Proven & Probable In-Situ (OP) 677 kt Gold 0.7 g/t 15 koz
Proven & Probable Total 1,409 kt Gold 2 g/t 89 koz
Measured In-Situ (UG) 88 kt Gold 3.8 g/t
Measured In-Situ (OP) 1,229 kt Gold 1.6 g/t
Measured Total 1,317 kt Gold 1.8 g/t
Indicated In-Situ (UG) 1,043 kt Gold 3.9 g/t
Indicated In-Situ (OP) 2,826 kt Gold 1.6 g/t
Indicated Total 3,869 kt Gold 2.2 g/t
Inferred In-Situ (UG) 233 kt Gold 3.2 g/t
Inferred In-Situ (OP) 1,020 kt Gold 1.2 g/t
Inferred Total 1,253 kt Gold 1.5 g/t
Total Resource In-Situ (UG) 1,364 kt Gold 3.8 g/t 165 koz
Total Resource In-Situ (OP) 5,075 kt Gold 1.5 g/t 242 koz
Total Resource Total 6,439 kt Gold 2 g/t 407 koz

Commodity Production Costs:

CommodityUnits2019201820172016
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required  ......  Subscription required 1,335 / oz 1,256 / oz
C1 cash costs Gold AUD  ......  Subscription required  ......  Subscription required 1,127 / oz 1,124 / oz
Subscription required - Subscription is required.

Financials:

Units2019201820172016
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

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

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required 2019
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2018
Annual Report 2017
Corporate Presentation 2017
Press Release 2017
Other 2016
Other 2011
Subscription required - Subscription is required.

News:

NewsDate
Alkane amps up gold production guidance January 20, 2021
Alkane drives NSW gold exploration with funding plan November 28, 2019
Alkane grows Tomingley gold project with underground development June 7, 2019

Aerial view:

Subscription required - Subscription is required.

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