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Hunter Valley and Hail Creek help boost Rio's coal reserves

RIO Tinto’s total coal ore reserves for all deposits have increased by 397 million tonnes, from 2,106 million tonnes to 2,504Mt, with increases in ore reserves coming from its Hunter Valley Operations in New South Wales where reserves increased by 309Mt to 890 Mt and Hail Creek in Queensland where reserves increased by 127Mt to 253Mt.

Lou Caruana
Hunter Valley and Hail Creek help boost Rio's coal reserves

Total mineral resources exclusive of ore reserves have increased by 1,376Mt, from 5,429Mt to 6,805Mt.

These increases to Mineral Resources include HVO Mineral Resources increasing by 458 Mt to 1,831Mt; Warkworth Mineral Resources increased by 138Mt to 613 Mt; Hail Creek Mineral Resources increased by 419Mt to 591Mt; Kestrel and Kestrel West Mineral Resources increased by 164Mt to 306Mt; and Winchester South Mineral Resources increased by 164Mt to 356Mt.

Rio Tinto’s Mt Robert contains a maiden Mineral Resource estimate of 31Mt.

“The upgrades have resulted from a program of orebody knowledge and strategic mine planning optimisation undertaken at Rio Tinto Coal Australia,” the company said. “They are based on a rigorous examination of all Rio Tinto Coal Australia leases that included consolidating and analysing a large volume of new and legacy geology data sets for all sites; reinterpreting and standardising all of the New South Wales and Queensland geology models, employing an expanded range of available data sets; updating the strategic mine planning processes and tools used to estimate Ore Reserves; and adopting more efficient Mineral Resource estimation methods.”

These increases in ore reserves and mineral resources reflect a continuation of the work announced in 2014.

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