Super Porphyry 2003 - 04
Super Porphyry Cu/Au Deposits of the World
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In the Grasberg Pit  -   Left:  Widodo Margotomo of Freeport (centre) points out aspects of the geology of the orebody to Stuart Hayward (Newcrest Mining - Australia), Liu Jianbing (Ivanhoe Mines - China), Peter Pelly (BHP Billiton - South Africa) and Colin McMillan (Newcrest Mining - Australia).   Right:  The group then studied mineralised and altered breccias and intrusives within the Grasberg Igneous Complex at a range of selected locations.   The pit visit was followed later in the day by briefings on both mine exploration and the geology of the underground deposits to be visited next day.   Photographs by Mike Porter
[Explanation] [Grasberg rocks]

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