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Thermometry of diogenites
https://nipr.repo.nii.ac.jp/records/2134
https://nipr.repo.nii.ac.jp/records/2134ff67a07e-0539-4b0f-bf5a-f0591f48ca31
名前 / ファイル | ライセンス | アクション |
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KJ00000012687 (1.2 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1987-03-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Thermometry of diogenites | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Mukherjee,Amalbikash
× Mukherjee,Amalbikash× Viswanath,T.A. |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Geology and Geophysics, Indian Institute of Technology/Department of Geology and Geophysics, Indian Institute of Technology | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Mg-Fe^<2+> exchange reaction between orthopyroxene and spinel has been calibrated thermodynamically and empirically and applied to the thermometry of diogenites. Based on regression of the orthopyroxene-spinel Mg-Fe^<2+> distribution coefficients against the Cr-mole fractions of the spinel of a number of naturally and experimentally equilibrated samples, the empirical calibration is more successful, gives internally consistent results and agrees well with independent temperature estimates of a wide range of terrestrial test samples. Uncertainty of the empirically determined temperatures, however, increases with decreasing Mg-Fe^<2+> distribution coefficient between orthopyroxene and spinel and increasing Cr-content of the spinel. Applied to a number of diogenites, the empirical calibration gives moderately high temperatures (687 and 885℃) for the Johnstown and Yamato-75032 diogenites and very high temperatures (between 1512 and 1941℃) for Y-692,-74013 and -74136 diogenites. The Johnstown and Y-75032 diogenites possibly represent thermally equilibrated orthopyroxene-spinel assemblages comparable to slowly cooled terrestrial ultramafic plutonic bodies broadly in the 700-900℃ temperature regime. The higher temperature Yamato group on the other hand appears to be disequilibrium assemblages, affected by shock-reheating, partial melting and recrystallization. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 46, p. 205-215, 発行日 1987-03 |