2000年4月
Decompression P-T path of coesite eclogite to granulite from Weihai, eastern China
LITHOS
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- 巻
- 52
- 号
- 1-4
- 開始ページ
- 97
- 終了ページ
- 108
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0024-4937(99)00086-9
- 出版者・発行元
- ELSEVIER SCIENCE BV
Granulitized coesite-bearing eclogite from Weihai, northeastern part of the Shandong peninsula, eastern China was studied in detail to reveal the modification of mineral chemistry during decompression metamorphism. Considerable modification of chemical composition is recorded in clinopyroxene that occurs both as inclusions in garnet and as a matrix mineral. Careful examination of chemical variation with the change in microstructure made it possible to estimate the equilibrium composition of minerals at the coesite eclogite and garnet granulite stages. We were able to define three reference points on the P-T path, namely, coesite eclogite (3 GPa, 660 +/- 40 degrees C), granulite (1 GPa, 700 +/- 30 degrees C) and amphibolite (0.9 Cpa, 600 +/- 20 degrees C). The path thus obtained is similar to those obtained by previous workers and supports nearly isothermal decompression of coesite eclogite. (C) 2000 Elsevier Science B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0024-4937(99)00086-9
- ISSN : 0024-4937
- Web of Science ID : WOS:000086267700007