caa a22 4500 465790747 CHVBK 20180323112023.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00310644 doi (NATIONALLICENCE)springer-10.1007/BF00310644 Nishiyama Tadao Department of Geology, Faculty of Science, Kyushu University 33, 812, Fukuoka, Japan aut CO2-metasomatism of a metabasite block in a serpentine melange from the Nishisonogi metamorphic rocks, southwest Japan [Elektronische Daten] [Tadao Nishiyama] Local fluid migration through a serpentine melange caused successive carbonation of a metabasite block (about 80 meter in diameter) during the uplift stage of the glaucophanitic metamorphic rocks, the Nishisonogi metamorphics, southwest Japan. The block shows a zonal sequence as follows. Zone 1: original greenschist (Am+Ep+ Chl+Ab+Sph+Qtz). Zone 2: epidote disappears by the reaction Ep+Am+CO2+H2O=Chl+Cc+Qtz. Zone 3: balc appears by the reaction Am+CO2+H2O=Ta+Cc+ Qtz. Zone 4:sphene breakdowns by the reaction Sph+ CO2=Rt+Cc+Qtz. Zone 5: amphibole disappears by the two simultaneous reactions, Am+CO2=Do+Ta+Qtz and Ta+Cc+CO2=Do+Qtz+H2O. Zone 7: albite is replaced by chlorite, calcite, dolomite and quartz, and the assemblage of Do+Cc+Chl+Rt+Qtz is stable. Analyses of phase relations indicate an introduction of CO2-rich fluid into the greenschist body during regional metamorphism. The CO2-rich fluid may have formed by devolatilization reactions between serpentinite and graphite-bearing metasediments. The fluid migrated within the melange through a channelized pathway and into the greenschist body from a deeper part of the melange. Springer-Verlag, 1990 Contributions to Mineralogy and Petrology Springer-Verlag 104/1(1990-01-01), 35-46 0010-7999 104:1<35 1990 104 410 https://doi.org/10.1007/BF00310644 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00310644 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Nishiyama Tadao Department of Geology, Faculty of Science, Kyushu University 33, 812, Fukuoka, Japan aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 104/1(1990-01-01), 35-46 0010-7999 104:1<35 1990 104 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer