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Australia
Granville Project

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 Location:
5 km W from Zeehan, Tasmania, Australia

  Project Contacts:
Level 27, 111 Eagle Street
Brisbane
Queensland, Australia
4000
Phone  ...  Subscription required
Fax+61 (0)7-3303-0681
EmailEmail
WebsiteWeb
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Overview

StatusCare and Maintenance
Mine TypeOpen Pit
Commodities
  • Tin
Mining Method
  • Truck & Shovel / Loader
The Group undertook a strategic review of Granville in September 2019 in order to determine the most economically efficient means of extracting value from the project. Post the strategic review, it was decided to place Granville on care and maintenance until a suitable mine fleet is available and additional equipment is installed at the plant. The Group has assessed and considered it prudent to maintain the provision for impairment against the Ore stockpiles and Tin in tailings recognised in the prior periods.

Aus Tin Mining is maintaining these properties in good standing in a care-and-maintenance state as it fields enquiries from parties potentially willing to acquire the assets.


Owners

Source: p. 3,9
CompanyInterestOwnership
Clara Resources Australia Ltd. 100 % Indirect
During the quarter Clara Resources Australia Ltd. executed a binding term sheet for the sale of the company’s wholly owned subsidiary, Ten Star Mining Pty. Ltd (“Ten Star”). Ten Star holds the tenements and other assets, including a rehabilitation bond, relating to the Granville Tin project in Tasmania.

It is anticipated full transaction documents will be completed with an execution date on or before 15 November 2022 and a settlement date of 21 December 2022.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Skarn


Summary:

The deposit is hosted in metamorphosed Neo- Proterazoic black carbonaceous shale and calcareous quartzite of the Oonah formation overlaid by Tertiary conglomerate, gravel and grit and subsequent Quaternary stream alluvium and swamp and marsh deposits. Mineralization occurs in the horizon of scarts with a magnetite strip associated with the layers, and tin is found as a supergene at a late stage, a low-temperature formation, that is, post-dating of skarn formation, and also (in the form of silicate) released during serpentinization. The horizon of the mineralized skarn extends approximately 50 meters long (north-south) and 15 meters wide (east-west).


Mining Methods

  • Truck & Shovel / Loader


Summary:

The current pit crest dimensions are approximately 125 m long (60 m at base of pit), 45 m to 50 m (25 m to 30 m at base) wide at its maximum and 20 m deep. The proposed expansion will increase the length of the pit base to 90 m with no effective increase in pit width at the base. The footprint at the crest is expected to increase to about 180 m in length and 110 m wide, disrupting approximately 0.5ha of relatively undisturbed vegetation in the process. The final pit depth will be nominally 40 m from the crest of the footwall shale (western slope) and 60 m from the crest of the hanging-wall (eastern side). Based on the current pit slope performance, the western pit wall will follow the footwall shale down to final pit depth as a single height highwall.

Based on the geometry of the final pit, it is proposed that the expansion will occur as a single cutback to the final pit void to allow adequate room for equipment to safely operate during mining. This cutback will be taken from the eastern and southern extent of the pit, retreating from the south towards the north for each cut. Depending on ore supply a shallow drop cut may be taken initially to ensure constant feed for the plant.

A nominal ramp grade of 1V to 6.5H (15 percent) will be adopted for design, so for a pit depth of 35 m, assuming a 5 m deep goodbye cut, the ramp will need to have a horizontal length of approximately 230 m. A minimum ramp width of 11.5 m will be allowed based on 2.5 x the width ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Projected Production:

CommodityUnitsLOM
Tin kt 0.8
All production numbers are expressed as concentrate.

Operational Metrics:

Metrics
Daily milling rate 160 t *
Stripping / waste ratio 4 *
Waste tonnes, LOM 145,000 t *
Ore tonnes mined, LOM 40,000 t *
Total tonnes mined, LOM 185,000 t *
Annual milling capacity 40,000 t *
Annual ore mining rate 26,667 t *
* According to 2016 study.

Reserves at :




Proposed Heavy Mobile Equipment as of December 21, 2016:
HME TypeModelSizeQuantityLeased or
Contractor
Bulldozer ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 22, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Quarterly Report 2022
................................... Subscription required 2021
Annual Report 2018
Environmental Assessment 2017
Technical Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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