Peridotites from the Parece Vela Rift in the Philippine Sea. Upper Mantle Material Exposed in an Extinct Back-arc Basin.:Upper Mantle Material Exposed in an Extinct Back-arc Basin
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概要
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Serpentinized peridotites and gabbros were dredged from the axial zone of the Parece Vela Basin during a cruise of S/V Takuyo in 1995. The central zone of the Parece Vela Basin is characterized by the NS trending chain of depressions forming right-step en-echelon alignment. Our petrological studies suggest that the peridotites are residues of extensive partial melting of primitive mantle peridotites. Presence of hydrous phases in the peridotites indicates that the peridotites were subjected to metasomatic event in the upper mantle beneath the Parece Vela Rift.
- 日本学士院の論文
著者
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Ishii Teruaki
Ocean Research Institute The University Of Tokyo
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OHARA YASUHIKO
Hydrographic and Oceanographic Department of Japan
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KASUGA SHIGERU
Hydrographic Department of Japan
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