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The East Sunda Arc, Indonesia - an emerging world-class porphyry Cu-Au province


Cooke, DR and Zhang, L and Maryono, A and Rompo, I and Harrison, RL and Hoschke, T, The East Sunda Arc, Indonesia - an emerging world-class porphyry Cu-Au province, Proceedings of the 15th SGA Biennial Meeting: Life with Ore Deposits on Earth, volume 3, 27-30 August 2019, Glasgow, Scotland, pp. 951-954. ISBN 9780852619643 (2019) [Refereed Conference Paper]

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Copyright 2019 Society for Geology Applied to Mineral Deposits (SGA)

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The East Sunda arc extends from western Java to Sumbawa in Indonesia and contains at least four world-class porphyry Cu-Au deposits (Batu Hijau, Elang, Tumpangpitu and Sori Onto), along with several porphyry and epithermal prospects. Late Miocene to Pliocene porphyry mineralization was associated with the emplacement of composite tonalite intrusive complexes emplaced into andesitic volcanic and volcaniclastic rocks. The geodynamic setting involved the subduction of the Roo Rise beneath the Sunda arc, with the porphyry deposits forming along the arc segment where the basement transitions from the Sundaland craton beneath eastern Java to oceanic crust beneath Sumbawa. The deposits have mineralized central domains associated with potassic alteration that has been extensively overprinted by intermediate argillic alteration (e.g., Batu Hijau and Elang), and/or advanced argillic alteration (e.g., Tumpangpitu and Sori Onto). High sulfidation epithermal gold mineralization has overprinted the Tumpangpitu porphyry in the Tujuh Bukit district, where an extensive lithocap is well-developed and has overprinted several porphyry deposits and prospects. Lithocaps also define the upper parts of Sori Onto and Elang, where they are superimposed over porphyry mineralization. Only the structural root zones of the Batu Hijau lithocap are preserved due to the greater degree of uplift and exhumation in SW Lombok.

Item Details

Item Type:Refereed Conference Paper
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Other mineral resources (excl. energy resources)
Objective Field:Other mineral resources (excl. energy resources) not elsewhere classified
UTAS Author:Cooke, DR (Professor David Cooke)
UTAS Author:Zhang, L (Dr Lejun Zhang)
UTAS Author:Maryono, A ( Adi Maryono)
UTAS Author:Harrison, RL (Miss Rachel Harrison)
UTAS Author:Hoschke, T (Mr Terence Hoschke)
ID Code:138766
Year Published:2019
Deposited By:CODES ARC
Deposited On:2020-04-28
Last Modified:2020-05-28

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