Formation process of cataclasite exposed in Hiraodai-Karst

Abstract

We studied the formation process of cataclasite of crystalline limestone exposed in Hiraodai-Karst, based on field survey, microstructural observation, measurements of homogenization and melting temperatures of fluid inclusions, and measurement of Rb/Sr isotope ratio of fluid inclusion and host calcite grains. The result suggests strongly that the cataclasite was generated by multiple hydrofracturing events related to comparatively high temperature and low salinity geofluid, which was in contact with the crystalline limestone for a long duration of time.