Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ... |
Mine Life | 2028 |
The Sanjiv Ridge (Corunna Downs) mine involves the mining of five open pits (Split rock, Razorback, Shark Gully, Runway North and Runway South).
Official operations commenced in February 2021. |
Source:
p. 17
The Sanjiv Ridge (Corunna Downs) mine is 100% owned by Atlas Iron Limited.
Atlas Iron Limited was acquired by Hancock Prospecting Pty Ltd, through its wholly-owned subsidiary Redstone Corporation Pty Ltd in December 2018.
Contractors
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Summary:
The Sanjiv Ridge (Corunna Downs) Project comprises five separate deposits: Split Rock, Shark Gully, Glen Herring, Razorback and Runway.
The project area is located within the Kelly and Coongan greenstone belts of the East Pilbara Craton, between the Shaw and Corunna Downs granitoid complexes (Figure 2). The deposits are located in the Cleaverville Formation of the Gorge Creek Group. The Cleaverville Formation hosted high-grade (+60% Fe) deposits at Goldsworthy, Shay Gap, Yarrie and Nimingarra that were mined as early as 1966 but are now closed.
The Cleaverville Formation comprises metamorphosed BIF and cherty BIF together with some interbedded siltstone and chert units and outcrops as a northeast trending plateau extending for some 20 km (Hermawan, 2016). To the north, the Cleaverville Formation and Warrawoona Group are unconformably overlain by the Mount Roe Basalt (the basal unit of the Fortescue Group) and sandstones with beds of conglomerate of Croydon Group, Lalla Rookh Sandstone.
Mineralisation
The majority of the mineralisation at Corunna Downs is gœthitic near surface and has probably been formed by supergene processes. This is reflected in the chemistry, which indicates that an overall grade of between 55% Fe and 57% Fe is dominant in the area. The deposits have a hard-cap (hydrated zone) dominated by vitreous gœthite extending to approximately 30 m in some places.
There are some indications that a higher grade, metamo ........
Summary:
The Project involves mining five open pits (Split rock, Razorback, Shark Gully, Runway North and Runway South), using conventional drill and blast, load and haul methods to extract an iron ore resource of approximately 23.1 million tonnes (Mt) over a mine life of approximately six years.
Source:
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Source:
Summary:
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Production:
Commodity | Units | 2022 * | 2021 |
Iron Ore
|
Mt
| ...... * | ...... * |
Reserves at June 30, 2018:
Mineral resources: cut-off 50% Fe
Ore reserves: cut-off 51%-53% Fe
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade |
Probable
|
20,900 kt
|
Iron
|
57 %
|
Indicated
|
51,100 kt
|
Iron
|
57.2 %
|
Inferred
|
13,000 kt
|
Iron
|
57 %
|
Total Resource
|
64,100 kt
|
Iron
|
57.2 %
|
Corporate Filings & Presentations:
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