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Australia
Kara Mine

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 Location:
25 km NE from Waratah, Tasmania, Australia

  Address:
683 Kara Road
Hampshire
Tasmania, Australia
7321
Phone  ...  Subscription required
Fax61-(03) 6435 2586
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron
  • Tungsten
Mining Method
  • Truck & Shovel / Loader
Processing
  • Gravity separation
  • Flotation
  • Magnetic separation
Mine Life25 years (as of Jan 1, 2016)
Production numbers has not been publicly available since 2017.


Owners

Source:
CompanyInterestOwnership
Tasmania Mines Ltd. 100 % Indirect

Deposit Type

  • Skarn


Summary:

A number of magnetite skarns lie within, or adjacent to, the outcrops of the Housetop, Ringwood and Kara granites. Turner (1989) lists magnetite skarns at Kara No I, Kara No 2, Sutton's, Hampshire (near the railway crossing), Redwater Creek, Laurel Creek and Peak Hill Farm. In the past, these magnetite bodies were worked sporadically as sources of iron for steel making, for example, at Pearson's workings in the Kara No 2 Main deposit. Some of the magnetite skarns contain economic concentrations of scheelite, for example Kara No 1, Eastern Ridge, Bob’s Bonanza, Location 5 and Kara 266.

Several scheelite-magnetite skarns occur on the Kara mine lease. The skarns are developed within folded Ordovician limestone rocks which are in contact with Devonian granite.

"Several scheelite-bearing garnet-diopside magnetite-amphibole- vesuvianite skarns have formed at a transitional boundary between siliceous sandstone and quartzwacke (Moina Sandstone) and overlying Gordon Group limestone. Most deposits are within a synformal structure in the Ordovician sedimentary rocks which are underlain and intruded by porphyritic and equigranular biotite-hornblende granite of the magnetite-series of the Devonian Housetop Granite.

The main deposits are within a trough-like pendant of skarn within the Housetop Granite. At Kara No.1 ore-grade scheelite mineralisation forms an irregularly-shaped blanket draped 15 25 m above the granite. Between the skarn and the granite is a tungsten-poor, quartz-epidote reaction zone. Skarn lithologies are varied but there is a sharp division between magnetite dominant and garnet (grossular-andradite) dominant units.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining operations currently consist of the mechanised excavation of weathered (oxidised) ore and overburden and blasting of fresh ore and waste rock with production blast holes - all mining operations are conducted by contract operators. Waste produced is currently utilised in tailings dam construction or placed within permanent waste storage facilities.

The current operating pit, the Stage 1 pit design, was generated and scheduled to supply high grade magnetite whilst conducting waste stripping for a Stage 2 pit. A concept of pit extensions (40m northward increments) was subsequently introduced and scheduled to maintain long term pit ore supply.


Crushing and Grinding


Processing

  • Gravity separation
  • Flotation
  • Magnetic separation

Source: Subscription required

Summary:

The extraction process for magnetite utilised gravity and magnetic separation to produce 189,935 tonnes of magnetite concentrate during 2015. Water used in the process is recirculated wherever it is viable to re-use it. The processing operations are conducted by operators employed directly by Tasmania Mines.

Scheelite concentrate continues to be intermittently produced. The process for scheelite recovery historically used gravity concentration on tables, sulphide cleaning by flotation and the removal of iron compounds by roasting and magnetic separation. Development and commissioning of a scheelite flotation circuit continues – current gravity recoveries, when operating, remain at low levels. Data for flotation recovery is not available.

Tasmania Mines produces scheelite of a single grade defined by the tungsten oxide content. High grade concentrate contains approximately 73% W03.

Recoveries & Grades:

CommodityParameter20162015
Iron (magnetite) Head Grade, % 4040
WO3 Concentrate Grade, % 7374

Production:

CommodityUnits20162015
Iron (magnetite) kt 186190
WO3 kt  ......  Subscription required  ......  Subscription required
All production numbers are expressed as concentrate.

Operational Metrics:

Metrics20162015
Ore tonnes mined 397,218 t386,462 t
Waste 416,257 t642,049 t
Tonnes processed 402,153 t391,897 t

Reserves at December 31, 2016:

CategoryTonnage CommodityGrade
Proven 9,350,000 t Iron (magnetite) 49.6 %
Proven 9,350,000 t WO3 337 g/t
Probable 624,000 t Iron (magnetite) 51.1 %
Probable 624,000 t WO3 799 g/t
Proven & Probable 9,974,000 t Iron (magnetite) 49.7 %
Proven & Probable 9,974,000 t WO3 366 g/t
Inferred 83,000 t Iron (magnetite) 59.4 %
Inferred 83,000 t WO3 2621 g/t

Financials:

Units20162015
Revenue M USD 40.6   40.7  
After-tax Income M USD 12.1   6.2  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Jan 5, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2016
Year-end Mineral Reserves 2016
Subscription required - Subscription is required.

Aerial view:

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