Mg2Si2O6-CaMgSi2O6-CaFeSi2O6-Fe2Si2O6系の高温常圧における相関係

大井 修吾; 三宅 亮

doi:10.14824/jakoka.2016.0_192

2016 Annual Meeting of Japan Association of Mineralogical Sciences

Session ID : R7-03

DOI https://doi.org/10.14824/jakoka.2016.0_192

Conference information

Host: Japan Association of Mineralogical Sciences

R7: Petorology, mineralogy and economic geology (Joint session with SRG)

Phase relationships in Mg₂Si₂O₆-CaMgSi₂O₆-CaFeSi₂O₆-Fe₂Si₂O₆ system at high temperature and atmospheric pressure

*Shugo Ohi, Akira Miyake

Author information

Keywords: Orthopyroxene, phase diagram, Mg₂Si₂O₆-CaMgSi₂O₆-CaFeSi₂O₆-Fe₂Si₂O₆ system, phase relationship

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

In recent year, we developed the hypothetical phase diagram in the Mg2Si2O6-Fe2Si2O6. The purpose of present study is to research phase relationships in pyroxene quadrilateral system by synthetic experiments.Experimental results of Ca_0.05(Mg_xFe_1-x)_1.95Si₂O₆ (x = 0.05, 0.10, 0.15, 0.20, 0.30 0.40) showed that the reaction of HT-Opx = Ppx + Pig occurred at 1345-1360, 1280-1310, 1260-1300 and 1370-1390 °C, respectively. We rebuilt phase diagrams based on these result.

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