| Burrows, David R., Rennison, Michael, Burt, David, Davies, Rod (2020) The Onto Cu-Au Discovery, Eastern Sumbawa, Indonesia: A Large, Middle Pleistocene Lithocap-Hosted High-Sulfidation Covellite-Pyrite Porphyry Deposit. Economic Geology, 115 (7). 1385-1412 doi:10.5382/econgeo.4766 | Journal (article/letter/editorial) | no. 7, pp. 1385–1412 The Onto Cu-Au Discovery, Eastern Sumbawa, Indonesia: A Large, Middle Pleistocene...Davies2 1 Vale 2 Global Exploration, Highway 17 West, Copper Cliff, Ontario, Canada P0M 1N0 Cobre Nuevo...project on eastern Sumbawa Island, Indonesia. A very large and blind copper-gold deposit (Onto) was discovered...to 600 m above sea level. In the area drilled at Onto, the diatreme breccia, all porphyry intrusions and...quartz-dickite to quartz-alunite and quartz-pyrophyllite ± diaspore alteration. The alteration package |
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