2022 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

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Oral presentation

R7: Petrology, Mineralogy and Economic geology (Joint Session with Society of Resource Geology)

Sat. Sep 17, 2022 9:30 AM - 12:30 PM B253 (Adv. Edu. Res. Bldg. E-2F)

Chairperson: Norikatsu Akizawa(The Univ. Tokyo), Taakuya Echigo(Akita Univ.)

9:30 AM - 9:45 AM

[R7-01] Amphibole in highly depleted peridotite

*Akihiro Tamura1, Ikuya Nishio1, Shoji Arai1, Tomoaki Morishita1 (1. Earth Sci, Kanazawa Univ.)

Keywords:Na

This study presents petrographical and geochemical features of highly depleted peridotite from the Horokanai ophiolite, Hokkaido, Japan. Melting process and condition forming the peridotite are discussed based on the model melting using Opx trace-element composition. We also show amphibole (pargasitic/edenitic) in the harzburgite, and discuss its significances in terms of boninite magma genesis and metasomatism in the ophiolite.