Source:
p. 28
| Company | Interest | Ownership |
|
IGO Ltd.
|
100 %
|
Indirect
|
On 20 June 2022, IGO Limited acquired 100% of the issued capital of Western Areas Limited. Western Areas was an ASX listed Australian-based mining and exploration company with a portfolio of operating and development stage mines. It owns a 100% interest in the Forrestania Operation (consisting of the Flying Fox and Spotted Quoll underground mines and the Cosmic Boy processing facility) and the Cosmos Project, both located in Western Australia, together with a substantial exploration portfolio.
Contractors
- Subscription is required.
Summary:
The deposit lie within the Forrestania Greenstone Belt, which is part of the Southern Cross Province of the Yilgarn Craton in Western Australia. The main deposit type is the komatiite hosted, disseminated to massive nickel sulphide deposits, which include the Spotted Quoll deposit. The mineralisation occurs in association with the basal section of high MgO cumulate ultramafic rocks.
The strike length of the Mineral Resource is nominally 300m on average, with a range of 25m to 520m, depending on depth below surface. The nominal mean dip length is 1,500m.
The elevation (RL) below the pre-existing pit is 1250mRL and the maximum depth of the Mineral Resource is 250mRL. The mean thickness of the mineralised zone is 3.1m, with a maximum thickness of 13.4m.
The deposit is located within the traditional footwall of the basal ultramafic metasediment contact, which was probably the original locus for sulphide deposition from an overlying pile of komatiite flows. Subsequent metamorphism, deformation, and intrusion of granitoid sills has contributed to a complex setting, with mineralisation now occupying a possible shear zone within the footwall sediments, 15-20m (stratigraphical) beneath the basalt/ultramafic contact.
The deposit is principally a body of matrix magmatic sulphide mineralisation in which the original pentlandite and pyrrhotite assemblage has been overprinted by arsenic-bearing assemblages dominated by gersdorffite and minor nick ........
Mining Methods
- Longhole open stoping
- Paste backfill
Summary:
Spotted Quoll is an underground mine which is a part of Forestania operation.
The mining method used is predominantly longhole stoping with a top-down sequence and paste filling of resultant voids.
A 3.0 m minimum mining width is used. The average length of stable stopes is between 10m and 30m. The average stope height is between 7m and 15m. Other geotechnical parameters are contained in the current Ground Control Management Plan.
The planned stope dilution is 0.5m (hanging wall) and 0.1–0.2m (footwall). Unplanned dilution (from host rock and paste) is 8.0% in weight at 0% Ni. The standard SG for dilution is 2.8t/m3 . A grade of 0% Ni is assigned to all material outside the block model. Ore recovery is 98%, and metal recovery is 98%. The pillar factor for unplanned pillars is 0%. Production rates reflect current mining performances and practice.
Being an operating mine, all infrastructure (apart from future capital development and external plants) is present and used on site, and allowance for new infrastructure, based on technical studies, is made in the CAPEX of the LOM.
Source:
Source:
Summary:
- subscription is required.
Production:
| Commodity | Units | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Nickel
|
kt
| ...... | ...... | ...... | 14 | 16 |
All production numbers are expressed as metal in ore.
- Subscription is required.
Operational Metrics:
| Metrics | 2021 | 2020 | 2019 | 2018 | 2017 |
|
Ore tonnes mined
| ...... | 340,808 t | 324,395 t | 346,455 t | 354,659 t |
- Subscription is required.
Reserves at June 30, 2023:
Mineral Reserve cut-off grade of 0.40% Ni.
Mineral Resource cut-off grade of 1.0% Ni.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
0.005 Mt
|
Nickel
|
3.02 %
|
0.2 kt
|
|
Probable
|
0.4 Mt
|
Nickel
|
3.17 %
|
11.8 kt
|
|
Proven & Probable
|
0.4 Mt
|
Nickel
|
3.17 %
|
12 kt
|
|
Measured
|
0.005 Mt
|
Nickel
|
3.02 %
|
0.2 kt
|
|
Indicated
|
0.4 Mt
|
Nickel
|
6.08 %
|
22.8 kt
|
|
Inferred
|
0.1 Mt
|
Nickel
|
3.7 %
|
5.4 kt
|
|
Total Resource
|
0.5 Mt
|
Nickel
|
5.39 %
|
28.3 kt
|
| HME Type | Model | Leased or
Contractor | Ref. Date |
|
Drill
|
.......................
|
|
Dec 31, 2020
|
|
Drill (long hole)
|
.......................
|
|
Dec 31, 2020
|
|
Load-Haul-Dump (LHD)
|
.......................
|
|
Dec 31, 2020
|
|
Load-Haul-Dump (LHD)
|
.......................
|
|
Oct 11, 2023
|
- Subscription is required.
Mine Management:
| Job Title | Name | Profile | Ref. Date |
|
.......................
|
.......................
|
|
Sep 29, 2022
|
- Subscription is required.
Corporate Filings & Presentations:
- Subscription is required.
News:
- Subscription is required.