High-temperature Acid Fluids and Associated Alteration and Mineralization: Extended Abstracts of the 3rd Symposium on Deep-Crust Fluids "High-Temperature Acid Fluids and Associated Alteration and Mineralization", Held at Tsukuba, October 1990
Yukihiro Matsuhisa, Masahiro Aoki, J. W. Hedenquist
Geological Survey of Japan, 1991 - Acids - 110 pages
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6"O values acid alteration acid sulfate acid-sulfate alteration alteration and mineralization alteration type alteration zone alunite alunite zone andesite anhydrite Aoki breccia caldera chloride clay crater DACITE depth dickite discharges drill hole Econ enargite environment epithermal epithermal gold equilibrium constant eruption Esan fluid inclusion formation fracture fumaroles Geological Survey geothermal field gold deposits gold mineralization groundwater Hatchobaru Hedenquist high sulfidation deposits high temperature hot springs hydrothermal alteration hydrothermal system Iceland Imbanguila Dacite interaction isotopic composition Izu Oshima Japan Japanese Kamikita Kamikita area kaolinite Kasuga Keywords Kirishima Koshimizu Kuroko Kyushu low sulfidation magmatic fluids Matsuhisa metals meteoric water mineral zones mineralogy Mining Geol molar volumes NaCl neutral pH occur oxygen isotopic permeability phase G porphyry copper pressure dependence propylitic pyrite PYROCLASTICS quartz reaction redox saline sea water silica silicified smectite solution steam-heated sulfur surface Survey of Japan thermal vapor veins volcanic Volcaniclastics wairakite zeolite