AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS
Exchange reactions of Fe^<2+> and Mg^<2+> between orthopyroxene and cordierite (abbreviated to Opx and Crd, respectively) : [chemical formula] were experimentally investigated in the Mg-rich portion of the pyrope (Mg_3Al_2Si_3O_<12>)-almandine (Fe_3Al_2Si_3O_<12>) system at t...
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Division of Earth Sciences, Department of Biosphere and Geosphere Sciences, Faculty of Science, Ehime University
1997
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ftnipr:oai:nipr.repo.nii.ac.jp:00002852 2023-05-15T13:49:00+02:00 AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS サカイ サトシ カワサキ トシスケ Satoshi SAKAI Toshisuke KAWASAKI 1997-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2852 http://id.nii.ac.jp/1291/00002852/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2852&item_no=1&attribute_id=18&file_no=1 en eng Division of Earth Sciences, Department of Biosphere and Geosphere Sciences, Faculty of Science, Ehime University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2852 http://id.nii.ac.jp/1291/00002852/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 10, 165-177(1997-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2852&item_no=1&attribute_id=18&file_no=1 orthopyroxene cordierite Fe-Mg partitioning geothermometer granulite Departmental Bulletin Paper P(論文) 1997 ftnipr 2022-11-26T19:42:17Z Exchange reactions of Fe^<2+> and Mg^<2+> between orthopyroxene and cordierite (abbreviated to Opx and Crd, respectively) : [chemical formula] were experimentally investigated in the Mg-rich portion of the pyrope (Mg_3Al_2Si_3O_<12>)-almandine (Fe_3Al_2Si_3O_<12>) system at temperatures from 1000℃ to 1325℃ under atmospheric pressure. Combining the volume data, the distribution coefficient of Fe-Mg partitionings between these phases, K_D(=[numerical formula]), was formulated as ln K_D=(1424+7.02P)/T-0.619,where P and T are in kbar and K. This reaction is temperature-dependent and would be a useful geothermometer. The applications of this orthopyroxene-cordierite thermometer to some Antarctic granulites yield equilibration temperatures of 100℃-200℃ lower than the previous estimations. This suggests that the exchange reaction of Fe^<2+> and Mg^<2+> between orthopyroxene and cordierite continued down to closure temperatures of 500℃-600℃ caused by subsequent cooling after the peak of metamorphism. Temperature estimations using the present orthopyroxene-cordierite thermometer for the igneous suites including S-type tonalite, rhyolite and granulitic xenoliths in andesite are in good agreement with those obtained from other thermometers. Report Antarc* Antarctic National Institute of Polar Research Repository, Japan Antarctic |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
orthopyroxene cordierite Fe-Mg partitioning geothermometer granulite |
spellingShingle |
orthopyroxene cordierite Fe-Mg partitioning geothermometer granulite サカイ サトシ カワサキ トシスケ Satoshi SAKAI Toshisuke KAWASAKI AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
topic_facet |
orthopyroxene cordierite Fe-Mg partitioning geothermometer granulite |
description |
Exchange reactions of Fe^<2+> and Mg^<2+> between orthopyroxene and cordierite (abbreviated to Opx and Crd, respectively) : [chemical formula] were experimentally investigated in the Mg-rich portion of the pyrope (Mg_3Al_2Si_3O_<12>)-almandine (Fe_3Al_2Si_3O_<12>) system at temperatures from 1000℃ to 1325℃ under atmospheric pressure. Combining the volume data, the distribution coefficient of Fe-Mg partitionings between these phases, K_D(=[numerical formula]), was formulated as ln K_D=(1424+7.02P)/T-0.619,where P and T are in kbar and K. This reaction is temperature-dependent and would be a useful geothermometer. The applications of this orthopyroxene-cordierite thermometer to some Antarctic granulites yield equilibration temperatures of 100℃-200℃ lower than the previous estimations. This suggests that the exchange reaction of Fe^<2+> and Mg^<2+> between orthopyroxene and cordierite continued down to closure temperatures of 500℃-600℃ caused by subsequent cooling after the peak of metamorphism. Temperature estimations using the present orthopyroxene-cordierite thermometer for the igneous suites including S-type tonalite, rhyolite and granulitic xenoliths in andesite are in good agreement with those obtained from other thermometers. |
format |
Report |
author |
サカイ サトシ カワサキ トシスケ Satoshi SAKAI Toshisuke KAWASAKI |
author_facet |
サカイ サトシ カワサキ トシスケ Satoshi SAKAI Toshisuke KAWASAKI |
author_sort |
サカイ サトシ |
title |
AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
title_short |
AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
title_full |
AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
title_fullStr |
AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
title_full_unstemmed |
AN EXPERIMENTAL STUDY OF Fe-Mg PARTITIONINGS BETWEEN ORTHOPYROXENE AND CORDIERITE IN THE Mg-RICH PORTION OF THE Mg_3Al_2Si_3O_<12>-Fe_3Al_2Si_3O_<12> SYSTEM AT ATMOSPHERIC PRESSURE : CALIBRATION OF ITS GEOTHERMOMETRY FOR HIGH-TEMPERATURE GRANULITES AND IGNEOUS ROCKS |
title_sort |
experimental study of fe-mg partitionings between orthopyroxene and cordierite in the mg-rich portion of the mg_3al_2si_3o_<12>-fe_3al_2si_3o_<12> system at atmospheric pressure : calibration of its geothermometry for high-temperature granulites and igneous rocks |
publisher |
Division of Earth Sciences, Department of Biosphere and Geosphere Sciences, Faculty of Science, Ehime University |
publishDate |
1997 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2852 http://id.nii.ac.jp/1291/00002852/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2852&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2852 http://id.nii.ac.jp/1291/00002852/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 10, 165-177(1997-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2852&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250321676337152 |