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Australia
Challenger Mine

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 Location:
250 km N from Ceduna, South Australia, Australia

  Address:
Level 9, Kyle House 27 – 31 Macquarie Place
Sydney
New South Wales, Australia
2000
Phone  ...  Subscription required
Fax(+612)-9247-3434
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
  • Silver
Mining Method
  • Uppers Retreat
Processing
  • Gravity separation
  • Carbon in pulp (CIP)
Mine Life3.5 years (as of Jan 1, 2018)
Latest NewsUpdate on Deed of Company Arrangement: relief from financial reporting obligations for a period concluding on the earlier of 31 January 2021 or the occurrence of one of the events that were included in that announcement(“Extension Period”)     November 4, 2019


Owners & OPERATOR

Source:
CompanyInterestOwnership
WPG Resources Ltd. 100 % Indirect
Challenger Gold Operations Pty Ltd. (operator) 100 % Direct
CGO owns and operates the Challenger Gold project. WPG Resources Ltd (WPG) acquired CGO from Kingsgate in March 2016 and is now the sole owner of CGO. CGO is a wholly-owned subsidiary of WPG Resources Limited (WPG), which is listed on the Australian Stock Exchange (ASX:WPG).

Deposit Type

  • Banded iron formation


Summary:

The Challenger Gold Deposit area lies in the northern Gawler Craton. The gold deposit and surrounding area exemplify regolith-landform relationships of the northern Gawler Craton.

The northern Gawler Craton has been affected by extensive and prolonged tectonism, but a significant proportion of the region retains Archaean to earliest Proterozoic radiometric ages. Archaean metasediments of the Mulgathing Complex were derived at least in part from pre existing continental basement, and include banded iron-formation (BIF), chert, carbonate, calc silicate, quartzite and aluminous sediments. Komatiite and tholeiitic basalt flows are inferred to be contemporaneous with sedimentation.

The Challenger area consists predominantly of the Christie Gneiss, which is a compositionally layered granulite facies metasediment. The most prominent and persistent type of outcrop in the region is BIF, which, in places, has been complexly folded and oxidised to haematite goethite gneiss. The BIF has a typical composition of quartz-magnetite-diopside plus hypersthene, with accessory apatite and Fe sulphide. The gneiss also contains bands of pink microcline-quartz-plagioclase-gamet and layers of carbonate with accessory garnet, clinopyroxene and olivine.


Mining Methods

  • Uppers Retreat


Summary:

The Challenger resource models were used to create detailed life of mine (LOM) designs for the extraction of each resource lode. The design was based around an uphole retreat, top down stoping sequence. This mining technique has been used in the past, and will be used in the future.

Mining of the narrow vein Challenger lodes has been designed with a minimum mining width of 1.5m. Based on historical mining at Challenger an external dilution of 40% has been applied in the calculation of all reserves, unless the development has been completed and a full stope analysis has been produced indicating variations to this dilution based on geotechnical input. A specific stope extraction factor has been applied to each level in the reserve estimation, based on the geological resource model, geotechnical requirements and the extraction sequence of each orebody shoot.


Crushing and Grinding


Processing

  • Gravity separation
  • Carbon in pulp (CIP)

Source: Subscription required

Summary:

Mining and processing operations at Challenger have been conducted since 2001. Although there was a temporary suspension of operations from 15 March 2016 to early May 2016 when operations recommenced under WPG’s management, Challenger is a mature operation with reliable historical data.

The existing Challenger CIP and gravity processing facility will be utilised to extract the gold. The performance of this plant is well understood.

Recoveries & Grades:

CommodityParameter201720162015
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 2.7745
Subscription required - Subscription is required.

Production:

CommodityUnits201720162015
Gold oz 50,88248,99280,151
Silver oz  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics201720162015
Ore tonnes mined  ......  Subscription required518 kt509 kt
Tonnes processed  ......  Subscription required386 kt515 kt

Reserves at December 31, 2017:

CategoryTonnage CommodityGradeContained Metal
Proven 99.4 kt Gold 3.99 g/t 12.7 koz
Probable 437.7 kt Gold 5.97 g/t 84 koz
Proven & Probable 537.2 kt Gold 5.6 g/t 96.7 koz
Measured 246 kt Gold 5.49 g/t 43 koz
Indicated 926 kt Gold 7.44 g/t 221 koz
Inferred 449 kt Gold 6.9 g/t 100 koz
Total Resource 1,621 kt Gold 6.99 g/t 364 koz

Commodity Production Costs:

CommodityUnits201720162015
Cash costs Gold USD 1,014 / oz
Total cash costs Gold USD 763 / oz 1,059 / oz
All-in sustaining costs (AISC) Gold USD 1,532 / oz

Operating Costs:

Units2016
Combined mining costs ($/t milled) USD 164.78

Financials:

Units2015
Revenue M USD 118.36  
Pre-tax Income M USD 9.97  
EBITDA M USD 14.4  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 26, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
Annual Report 2017
Annual Report 2017
Annual Report 2016
Press Release 2016
Annual Report 2015
Project Description 2003
Subscription required - Subscription is required.

News:

NewsDate
Update on Deed of Company Arrangement: relief from financial reporting obligations for a period concluding on the earlier of 31 January 2021 or the occurrence of one of the events that were included in that announcement(“Extension Period”) November 4, 2019

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