2015年8月
Phase transitions of serpentine in the lower mantle
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
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- 巻
- 245
- 号
- 開始ページ
- 52
- 終了ページ
- 58
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.pepi.2015.05.007
- 出版者・発行元
- ELSEVIER SCIENCE BV
Phase transformations in natural serpentine and chlorite have been studied at 25-50 GPa and 900-1280 degrees C by in-situ X-ray diffraction measurements using the multianvil apparatus with sintered diamond anvils. Antigorite was found to transform to a phase assemblage including phase H, at pressures above about 35-40 GPa corresponding to those in the upper part of the lower mantle. The zero pressure bulk modulus K-0 of phase H was determined to be 160 GPa, assuming its pressure derivative K' = 4. The thermal stability of phase H is significantly enhanced by a solid solution with a delta-AlOOH component, suggesting that aluminous phase H in cold slabs would deliver a certain amount of water into the deepest part of the lower mantle. (C) 2015 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.pepi.2015.05.007
- ISSN : 0031-9201
- eISSN : 1872-7395
- Web of Science ID : WOS:000360515600005