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K silicate alteration is all but obliterated in the upper parts of some gold-rich porphyry deposits, for ex-ample, Dizon (Sillitoe and Gappe, 1984), Guinaoang (Sillitoe and Angeles, 1985), Marte (Vila et al., 1991), and Tanamá (Cox, 1985). Intermediate argillic alteration varies in both intensity and mineralogy.
27 de nov. de 2017 · Sillitoe RH (2010) Porphyry copper systems. Econ Geol 105: 3–41. Mineral Resources to Discover - 14th SGA Biennial Meeting 2017, Volume 1. 294. Citations (16)
Richard H. Sillitoe Porphyry copper systems (in A group of papers on porphyry Cu deposits, Lawrence D. Meinert) Economic Geology and the Bulletin of the Society of Economic Geologists (January 2010) 105 (1): 3-41
6 de feb. de 2018 · Consequently, few magmatic suites in Japan and South Korea provide propitious environments for porphyry Cu exploration, with the last hope believed to lie at depth below late Miocene–Pliocene advanced argillic lithocaps, several of which contain relatively minor high-sulfidation epithermal Au mineralization.
Richard H Sillitoe. Eleven gold‐rich porphyry copper and 14 epithermal gold deposits around the Pacific rim contain > 200 t (‐7 million oz) of gold. These large porphyry‐type deposits ...
1 de may. de 2019 · PDF | On May 1, 2019, Richard H. Sillitoe and others published Geology of the Josemaría Porphyry Copper-Gold ... Deposit age assignments based on Sillitoe et al. (1991, 2013, 2016), Kay ...
Porphyry type mineralization developed in Ali Javad quartz monzonitic porphyry stock and Eocene pyroclastic and volcanic country rocks. Ali Javad porphyry intrusion has shoshonitic nature and shows characteristics of volcanic arc granitoids that it is have been emplaced in a post-collision tectonic setting.
