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Australia
Kailis Mine (Thunderbox Operation)

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 Location:
5 km N from Leonora, Western Australia, Australia

  Address:
Level 1, 388 Hay Street PO Box 2008
Subiaco
Western Australia, Australia
6008
Phone  ...  Subscription required
Fax+61-8-6188-2111
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Overview

StatusCare and Maintenance
Mine TypeStockpile
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
At present Kailis open pit is in “care and maintenance”. All required Environment studies has been completed for current Reserve pit. All statutory government approvals including clearing permit, project management, operating licence and groundwater licences have been in granted. The existing Mining Proposal will be revised and resubmitted to accommodate future reserve pit.


Owners

Source: p. 153
CompanyInterestOwnership
Northern Star Resources Ltd. 100 % Indirect
The tenements are 100% held by Northern Star (Thunderbox) Pty Ltd, a wholly owned subsidiary of Northern Star Resources Ltd.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

Gold mineralisation at Kailis - Trump is hosted in quartz-sericite schist within a broad east-west trending, shallow to moderately dipping (40-50 degrees SSE) shear zone with a strike length in excess of 1800m. Mineralised intervals are often narrow (1-3m) but thicken to 8-20m in places. The shear zone encapsulates a high nugget mineralisation style with common occurrences of visual gold. Structural studies identified narrow sub vertical NE-SW trending quartz vein sets/structures that crosscut the main shear zone as possible controls on high grade mineralisation. The best gold grades tend to occur in the oxide and transitional zones with lower grades in the fresh rock. Mineralisation is open at depth but closed along strike.

The Kailis-Trump resource is contained within a + 40m wide shear zone which extends over a strike length of approximately 1,800m from 174,400mE to 176,200mE (MGA), and dips 30° to the south and flattens as move east toward Trump. Mineralisation is open at depth and to the west. It sits primarily within the oxide profile with economic mineralisation occurring at 30m below surface to 120m depth.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Kailis deposit has successfully been mined by open pit in the past and in Stage 1 and Stage 2.

The mining method employed at Kailis open pit was conventional open pit with hydraulic excavator and dump truck fleet, and drill and blast activity.

The Kailis reserve pit is designed as a successive cutback to the previously mined reserve. At present the mine is in “care and maintenance”. The cutback will be mined in appropriate manner such that it meets the operational efficiency, safety and production rates.


Crushing and Grinding
Flow Sheet: Source

The process consists of a double toggle jaw crusher followed by a SAG and Ball milling circuit.

Metso Outotec has been chosen to supply its Premier SAG Mill for Northern Star Resources’ Thunderbox gold mine expansion. The expansion should double the throughput of the Thunderbox operation.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits20192018
Gold oz  ......  Subscription required65,000
All production numbers are expressed as metal in ore.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018
Waste  ......  Subscription required2,489,391 t
Ore tonnes mined  ......  Subscription required147,864 t871,000 t
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Reserves at June 30, 2020:
The Ore Reserve is estimated at a cut-off grade of 0.60g/t.

CategoryTonnage CommodityGradeContained Metal
Probable 79 kt Gold 2 g/t 5 koz
Indicated 490 kt Gold 2.3 g/t 36 koz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 7, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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