DURING the course of hydrocarbon evolution and migration, large quantities of H<sub> </sub>2S are often produced.This process is most familiar to petroleum geologists, and may lead to forming of natural ga...DURING the course of hydrocarbon evolution and migration, large quantities of H<sub> </sub>2S are often produced.This process is most familiar to petroleum geologists, and may lead to forming of natural gas deposits. Themost important H<sub>2</sub>S-forming reactions are bacterial sulfate reduction （BSR）, and thermochemical sulfatereduction （TSR）. Whereas BSR is restricted to relatively low temperature （【100℃） and shallowdepths, TSR becomes important at elevated temperature （】150℃） and greater depth of burial. BecauseH<sub>2</sub>S is highly soluble in water, any groundwater in the vicinity of a TSR-active zone will also become enriched in H<sub>2</sub>S. The central hypothesis of this paper is that hot groundwaters associated with TSR in carbonate terrains acquire the ability to transport gold and other elements （e.g. Ag, Hg, As, Sb, Tl）展开更多
文摘DURING the course of hydrocarbon evolution and migration, large quantities of H<sub> </sub>2S are often produced.This process is most familiar to petroleum geologists, and may lead to forming of natural gas deposits. Themost important H<sub>2</sub>S-forming reactions are bacterial sulfate reduction （BSR）, and thermochemical sulfatereduction （TSR）. Whereas BSR is restricted to relatively low temperature （【100℃） and shallowdepths, TSR becomes important at elevated temperature （】150℃） and greater depth of burial. BecauseH<sub>2</sub>S is highly soluble in water, any groundwater in the vicinity of a TSR-active zone will also become enriched in H<sub>2</sub>S. The central hypothesis of this paper is that hot groundwaters associated with TSR in carbonate terrains acquire the ability to transport gold and other elements （e.g. Ag, Hg, As, Sb, Tl）
