Changes to Pilbara Mineral Resources
28 February 2019
On 28 February 2019 Rio Tinto announced to the Australian Securities Exchange (ASX) increases in Mineral Resources at its Pilbara iron ore operations in Western Australia.
This announcement was made in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves, 2012 (JORC Code) and the ASX Listing Rules. A copy of the full announcement is available on Rio Tinto's website at www.riotinto.com/reservesandresources.
In 2018, technical work was conducted across multiple deposits with over 700,000 m drilled. A portion of this has contributed to the significant changes in the following Mineral Resources:
|
Mineral Resources |
Music Hall / Old Vic |
First reporting of Mineral Resources for Music Hall and Old Vic has added to Hamersley Iron: · 225 Mt of Marra Mamba ore; and · 58 Mt of Detrital ore. |
Western Hill |
Update to the Mineral Resources for Western Hill has added to the Robe River JV: · 112 Mt of Brockman ore; · 42 Mt of Brockman Process ore; and · 12 Mt of Detrital ore. |
Changes in Mineral Resources estimates at Rio Tinto's Pilbara iron ore operations between 31 December 2017 and 31 December 2018 are as follows:
|
Tonnage (Mt) |
2017 Mineral Resources |
22,538 |
Music Hall / Old Vic increases |
283 |
Western Hill increases |
166 |
Net amount of other changes |
332 |
2018 Mineral Resources |
23,319 |
Rio Tinto's Mineral Resources are set out in full in its annual report released on 28 February 2019. Mineral Resources are reported as dry in-situ tonnages in addition to Ore Reserves.
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