The Mount Webber Project consists of three deposits:
• Gibson/Daltons – one deposit split on a tenement boundary;
• Fender – located to the southwest on the same banded iron formation (BIF) unit as Gibson/Daltons; and
• Ibanez – located slightly to the west of Gibson on a parallel BIF outcrop.

The Project is located within the Archaean age Granite greenstone terrane of the Pilbara Craton, with the deposits occurring within the Gorge Creek and Sulphur Springs Groups of the Pilbara Supergroup (Slomp, 2017). Complex folding and faulting have resulted from the deposits being located between two large granitoid complexes – the Shaw Granitoid Complex to the east and the Yule Granitoid Complex to the west (Hermawan, 2013).

The deposits are hosted within the Pincunah Banded Iron Member (Hickman, 2013) of the Kangaroo Caves Formation. The Pincunah Banded Iron Member comprises red-black BIF, chert, tuff, siltstone and shale and is unconformably underlain by the Warrawoona Group mafic and ultramafic lithologies. The BIF and chert of the Pincunah Banded Iron Member form steep-sided ridges with flat-topped summits. The Pincunah Banded Iron Member has been informally divided into Upper and Lower BIF units separated by a thin chert unit.

One dolerite intrusive has been identified in the Fender deposit that cuts the entire sequence, but this has had no apparent effect on the mineralisation.

Mineralisation
The mineralisation has ........

The mining approach to the Mount Webber deposit is by conventional open pit mining methods using drill and blast methods. Mined material is mined in 6 m-high benches. The blasted rock is loaded across two 3 m-high flitches by backhoe excavators into rigid body trucks.

The contractor provides the mining and processing equipment, completes operations and maintenance activities. The mining of ore at Mt Webber is contracted to BGC Contracting Pty Ltd (now NRW Contracting Pty Ltd).

Stage 1 mining at Mt Webber began in July 2014 at a rate of 3 Mtpa. In late 2014 mining increased to 6 Mtpa following completion of Stage 2 developments. Production increased to approximately 9 Mtpa beginning in August 2017. Mining was reduced back to 7.8 Mtpa between November 2017 to February 2018 before increasing again to approximately 9 Mtpa thereafter. As at August 2020 the Mt Webber mine life is estimated to be 2.5 years depending on future mine plans and ultimate production rates.

Ore and waste is differentiated through grade control practices and ore is trucked to the run-of mine (ROM) stockpile. Ore is segregated into grade categories, namely:
• H0 - +60% Fe
• H1 – 57.5 to 60% Fe
• H2 – 55 to 57.5% Fe (Ibanez and Fender)
• H2 – 53.5 to 57.5% Fe (Gibson/Daltons)
• H3 – 53.5 to 55% Fe (Ibanez and Fender)
• H3 – 50 to 53.5% Fe (Gibson/Daltons).

Material is classified as waste when the grade is below 53.5% Fe for Ibanez and F ........

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