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Australia
Bronzewing Mine

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 Location:
117 km SE from Wiluna, Western Australia, Australia

  Address:
Level 1, 388 Hay Street,
PO Box 2008 Subiaco WA 6904
Subiaco
Australia
6904
Phone  ...  Subscription required
Fax+61-8-6188-2111
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Overview

StatusCare and Maintenance
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life4 years (as of Jan 1, 2019)
The Bronzewing Operations are in a care and maintenance phase. Bronzewing and Orelia open pits are currently undergoing development.

Bronzewing Project have been re-distributed into the likely processing option either Thunderbox or Jundee.


Owners

Source: p. 76
CompanyInterestOwnership
Northern Star Resources Ltd. 100 % Indirect
The Bronzewing Project`s tenements are variously registered (via Northern Star or wholly owned subsidiaries), with Northern Star Resources Limited being the 100% registered owner.

Contractors

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Deposit Type

  • Hydrothermal
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

Orelia is Archean gold mineralized deposit that is part of the Yandal Greenstone belt. The stratigraphy dips approximately 60 degrees towards the west and strikes north south. The oldest and the most western unit is the ultramafic sequence, towards the east, the komatiite unit has a sharp contact with a 2-5m massive sulphide/breccia unit. This contact is the Calista shear. The stratigraphic sequence east of the Calista shear and massive sulphide unit consists of a series of basaltic units. This includes massive and pillowed tholeiitic basalt, basaltic lithic lapilli tuff, and interflow sedimentary rocks. In the middle of this sequence lies the Orelia dolerite that has been classified as an ophitic basalt. Further towards the east the next unit is a felsic zone dominated by sandstones, siltstones and mudstones with intercalations poorly sorted volcaniclastics tuffs of dacitic composition. This felsic unit is intruded by 2 dolerites Cumberland in the east and Lotus in the west. The whole Orelia stratigraphy is intruded by a suite of late intermediate dioritic to lamprophyre dykes ranging from 0.5m to 2-3m in width. The sequence appears to be upright with the older Ultramafic member thrusted over the basaltic and felsic units. The main host rocks of mineralisation at Orelia-Cockburn are deformed and altered tholeiitic basalts, and intermediate to felsic volcaniclastic rocks. It appears that the structures in the main mineralised corridors exploit the rheological contacts betwe ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Bronzewing Operations are in a care and maintenance phase. Bronzewing and Orelia open pits are currently undergoing development. The selected mining method for the Orelia deposit is of a bench mining open pit method. The proposed open pit cutback will be mined using conventional open pit mining methods (drill, blast, load and haul) utilising similar class excavators and trucks used in other NSR open pit mining operations. A mining recovery factor of 95% has been applied reporting of Open pit Reserve physicals. A minimum mining width down to 25 m for final pit extraction from the base of pit has been used. The Orelia pit will be mined in two stages (1A and 1B). The Stage 1A pit will deepen the floor of the existing pit to target higher grade, lower strip ratio ore. The Stage 1B pit will include a cutback to the west and north walls as well as deepening below the Stage 1A floor. MINING All the defined Mineral Resource Estimates at the Yandal Gold Project are within an open pit mining environment and are a lode style of mineralisation requiring a degree of mining selectivity. The material to be excavated will be predominantly free dig from surface with blasting required deeper in the oxidation profile and into the fresh ore zones. Given these conditions, conventional open pit mining techniques using drill and blast with material movement by hydraulic excavator and trucks will be employed. The project scale and selectivity would suit 120 t – 200 t class excavators in ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Gold oz 95,000379
All production numbers are expressed as metal in doré.


Reserves at March 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 3,600 kt Gold 2 g/t 234 koz
Probable 11,891 kt Gold 1.5 g/t 557 koz
Proven & Probable 15,491 kt Gold 1.6 g/t 791 koz
Measured 2,800 kt Gold 2.6 g/t 237 koz
Indicated 17,116 kt Gold 1.9 g/t 1,045 koz
Inferred 5,310 kt Gold 1.5 g/t 263 koz
Total Resource 25,226 kt Gold 1.9 g/t 1,545 koz



Proposed Heavy Mobile Equipment as of April 23, 2019:
HME TypeModelSizeQuantity
Excavator ....................... Subscription required 200 t ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 31, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Fact Sheet 2018
Feasibility Study Report 2018
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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