Process of rock fracturing triggered by geofluid

Abstract

Geofluid is considered to have important effect on earthquake-generation related to the subduction zone. We report the identified distinctive distribution of the different degrees of cataclasites in Hiraodai-Karst, showing rounded or elliptical mapped patterns. Using microstructural data, mineral chemistry, fluid-inclusion study and Rb-Sr isotope data, we shed light on the formation mechanism of the cataclastic rocks, age of fracturing, and also report the multiple hydrofracturing events related to comparatively high temperature and low salinity fluid.