2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
[R8-09]Significance of talc-calcite vein from the Yaeyama metamorphic rocks
*Masahiro Yoshikawa1, Kenji Asakura1, Takao Hirajima1(1. Kyoto Uni.)
Keywords:
Talc,Calcite,Yaeyama metamorphic rocks
To investigate fliud activity in the Yaeyama metamorphic rocks, we studied mineral veins developed in the metamorphic rock. Here we report talc(Tlc)-calcite(Cal) bg.vein developed in mafic schist with epidote and actinolite. The following reaction is inferred from the development of Tlc in the vein:
6Cal+5Tlc+4SiO2=3Act+6CO2+2H2O
Thermodynamic analysis suggest that Tlc-Cal assemblage can be formed by infiltration of H2O-rich fluid during the exhumation stage.
6Cal+5Tlc+4SiO2=3Act+6CO2+2H2O
Thermodynamic analysis suggest that Tlc-Cal assemblage can be formed by infiltration of H2O-rich fluid during the exhumation stage.