In Nanla area, the vegetation colour anomaly on remote sensing image is a reflection of the hydrothermal alteration, which can be regarded as an indirect indication in ore prospecting.
Gold bodys are metasomatic vains, and was generated by diorite and surrounding rock which suffered multi-stage breccia, silicification and sericite hydrothermal alteration.
Petrological and mineralogical examinations of core material can be used to identify hydrothermal alterations.
The origin of Kaolins in the South China is related to acid igneous rocks, such as granite etc, and most of them belong to weathering (residual) types, or to hydrothermal alteration types.
The Baguamiao gold deposit of Feng County, Shaanxi is an extraordinary gold deposit, which genesis is related to brittle-ductile shear and magma hydrothermal alteration.
The original rocks of the mineral deposit are rhyolite and tuff. Due to hydrothermal alteration under proper conditions the ore can be formed. It is also shown that the bentonites are calcareous ones.
Illite jade, in vein, was discovered in some copper mine, located in Daye county, HubeiProvince, and is a rind hydrothermal alteration rock from anorthosite.
Mylonitization and hydrothermal alteration impacts on U-Pb system of zircons:A case study of Fangcheng syenites in eastern Qinling Orogen
國文精選館
