Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
|
| Production Start | ...  |
Mining operations continued and on 22 September 2021, following a significant and rapid decrease in the iron ore price, GWR halted mining operations temporarily to assess the market with mining re-commencing in January 2022.
In July 2022 the Group signed a Binding Term Sheet to grant the mining rights to C4 to Gold Valley Iron Ore Pty Ltd. |
Source:
p. 1
Subsequent to year-end 2022, the rights over the mining operations, along with the existing inventories and mining equipment, were sold.
On 20 July 2022, the GWR Group announced the signing of a binding term sheet to sell the rights to mine the C4 Iron Ore Deposit, residual rights to income from the JWD Iron Deposit and plant, equipment and existing inventories associated with the C4 Iron Ore Deposit to Gold Valley Iron Ore Pty Ltd (“GV”).
Key Terms of the Mining Rights Agreement:
- GV granted the right to mine remaining iron ore from the C4 Deposit.
- GV granted all GWR’s rights in relation to the JWD Deposit pursuant to the terms of the existing Mining Rights Agreement between GWR and Wiluna Fe Pty Ltd and the right to mine any iron ore from the JWD Deposit that is not mined pursuant to the Mining Rights Agreement between GWR and Wiluna Fe Pty Ltd.
Contractors
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Summary:
The Wiluna West project covers a 25 km strike length over the Joyners Find Greenstone Belt, near the northern margin of the Yilgarn Craton. The Joyners Find Greenstone Belt is a narrow (5 km to 10 km) north-south striking greenstone belt comprising low ridges of BIF (in the central and eastern portion) intercalated with mafic and ultramafic schists with minor chert and clastic sediment horizons. The Joyners Find Greenstone Belt strikes north and dips steeply to the west. Folds developed during the D2 deformation event are observed in the BIF ridges as tight to isoclinal folds oriented north-south with west dipping axial planes. The BIF ridges are variably deformed and intensely folded.
Two regional dextral shear zones are recognised: the Joyner’s Find Shear Zone (JFSZ) strikes to the north through the centre of the belt and is parallel to the lithological strike; and the Brilliant Shear Zone (BSZ) which is oriented north-northwest.
There are three main Banded Iron Formation (BIF) units which form ridges within the project area (Units A, B and C). High grade DSO hematite mineralisation occurs within units B and C with grade occurrences of up to 69% Fe. Iron mineralisation occurs within BIFs surrounded by inter-bedded mafic and ultramafic schist units. The two main ridges show distinctive mineralisation styles with B ridge showing a much lower proportion of remnant bedding and generally a significantly higher portion of haematite especially in the top 20 m ........
Summary:
The deposit is outcropping and mining of the C4 pit commenced in December 2020.
The Stage 1 pit will extract 1Mt of high-grade and high quality (low impurities) DSO product with a low strip ratio of 1:1.25.
Additional to this there is significant opportunity to delineate further pods of surface ore and extend the project life from not just C4, but other shallow deposits at the WWIOP adjacent to C4.
Mining in the Stage 1 pit was completed in late March and mining is now focused on the Stage 2 pit cutback, moving to two shifts from the first of April 2022. Increased quantities of ore are expected in the pit and only two benches remain to be mined before the high-grade iron ore is exposed which is up to 120 m wide. Mining of this ore will underpin an increase in the number of shipments to two per month.
GWR halted mining operations temporarily to assess the market with mining re-commencing in January 2022.
Source:
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Flow Sheet:
Summary:
Ore processing consists of crushing and screening of the ore through a modular constructed two-stage crushing and screening plant to produce lump and fines using an electric powered modular mounted crushers, screens and portable conveyors. The plant produce two products: a lump product which is between 31.5mm and 6.3 mm product and a fine product (- 6.3 mm).
Reserves at July 8, 2011:
The Mineral Resources as at 30th June 2022 at Wiluna West C4 are unchanged from July 08, 2011.
C4 DSO hematite mineral Resource reported above a 50% Fe cut off.
| Category | Tonnage | Commodity | Grade |
|
Indicated
|
18.5 Mt
|
Iron (hematite)
|
61.17 %
|
|
Inferred
|
3.1 Mt
|
Iron (hematite)
|
58 %
|
|
Total Resource
|
21.6 Mt
|
Iron (hematite)
|
60.72 %
|
Financials:
| | Units | 2022 | 2021 |
|
Revenue
|
M AUD
| ...... | ...... |
|
Pre-tax Income
|
M AUD
| ...... | ...... |
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