Occurrences of orthopyroxene in primitive layered gabbros from the Hess Deep Rift, East Pacific Rise
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- Hoshide Takashi
- Faculty of International Resource Sciences, Akita University
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- Machi Sumiaki
- Center for Northeast Asian Studies, Tohoku University
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- Maeda Jin-ichiro
- School of Science, Hokkaido University
Bibliographic Information
- Other Title
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- 東太平洋中央海嶺ヘスディープ海盆の初生層状斑れい岩に見られる斜方輝石の産状
Abstract
One of enigmas of the layered gabbros which IODP Exp.345 drilled at the Hess Deep Rift is the fact that Opx occurs as a cumulus phase. In the Multi-textured layered gabbro which constitutes the upper unit of the Hole U1415P, we can observe the following occurrences of Opx: (1) Opx+Cpx+Pl vein parallel to the layered structure of its surrounding troctolite. (2) Undeformed Opx+Pl veinlets in kinked Ol. (3) Opx in the concave of anhedral Ol. (4) Opx in the surroundings of Cr-spl adjacent to the Ol+Pl domain. The occurrences of Opx suggest the reaction between Ol and SiO2-saturated melt.
Journal
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- Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
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Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2015 (0), 164-, 2015
Japan Association of Mineralogical Sciences
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Details 詳細情報について
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- CRID
- 1390283659839368960
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- NII Article ID
- 130007785270
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed