Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2015 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-P03
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S2: Water Rock Interaction (Joint session with SRG)
Formation process of cataclasite exposed in Hiraodai-Karst
*Jun-ichi ANDOSaya IshiyamaShun'ichi NakaiKaushik DasYasuhiro Ota
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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.

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© 2015 Japan Association of Mineralogical Sciences
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