Book Chapter
Spatial and Temporal Relationships between Hydrothermal Alteration Assemblages at the Palinpinon Geothermal Field, Philippines—Implications for Porphyry and Epithermal Ore Deposits
Andrew J Rae, David R Cooke, David Phillips, Chris Yeats, Chris Ryan, Danilo Hermoso
Volcanic, Geothermal, and Ore-Forming Fluids | Society of Economic Geologists | Published : 2005
DOI: 10.5382/sp.10.13
Abstract
Abstract The Palinpinon geothermal field (Negros Island, Philippines) is a high-temperature, liquid-dominated geothermal system. Hydrothermal alteration assemblages in the Nasuji-Sogongon region are associated with the Nasuji pluton and include K silicate (biotite, magnetite), calc-silicate (garnet, clinopyroxene), hypogene advanced argillic (andalusite, zunyite), propylitic (tremolite-actinolite, epidote), and distal illite (smectite, illite) and steam-heated advanced argillic (amorphous silica, kaolinite, alunite) assemblages. Biotite alteration and associated veins formed from magmatic-hydrothermal fluids that had temperatures from 267° to >600°C, salinities of 26 to ..
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