Mineralisation at Eastern Range occurs as haematite/goethite mineralisation hosted within the banded iron formations of the Brockman Formation.

The Pilbara region comprises a large part of the ancient continental shield of Western Australia which is comprised of both Proterozoic and Archaean rocks. The Pilbara is overlain by the Proterozoics deposited in the Hamersley and Bangernall Provinces.

The BIF is a member of the ~620 m thick Brockman Iron Formation which makes up part of the 2.63 2.45 Ga Hamersley Group. The Hamersley Group comprises almost 2.5 km of consecutive sedimentary and volcanic rocks located within the ca. 80,000 km2 Hamersley Province of the Pilbara craton in North West Australia, approximately 1100 km north of Perth. In the lower part, it consists of dolomite, shale and BIF, while the upper part consists of dolerite, various lava types and BIF with minor amounts of tuffs and shales. Underlying the Hamersley Group, is the 2.78–2.63 Ga Fortescue Group, which consists of flood basalts and rhyolites. These volcanics were laid down on the uplifted and eroded Pilbara block. This volcanic succession may contain remnants of a Large Igneous Province (LIP).

The Brockman Iron Formation ofthe Hamersley Group is divided into four sub-lithostratigraphic units, namely the lowermost Dales Gorge Member (BIF), the Whaleback Shale Member, the Joffre Member (BIF), and the uppermost Yandicoogina Shale Member. After deposition, these laterally ex ........

The Eastern Range iron ore mine is located in the Pilbara region of Western Australia, with the closest town being Paraburdoo, 8 km to the north. It falls within the local authority of the Shire of Ashburton. The mine is operated by Rio Tinto as part of the Greater Paraburdoo mining hub. Operations at Eastern Range span deposits at 23-24 East, 32 East, 37-42 East, 42 East and future mining at 42EE and the 47E deposits.

Ore is extracted using traditional open pit, drill and blast and load and haul methods.

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