2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Sep 15 - Sep 19, 2021Online
日本鉱物科学会年会
2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Sep 15 - Sep 19, 2021Online

[S2-03]Sr isotopic variation of the CM1A core samples of Oman ophiolite

*Masako Yoshikawa1, Tomoyuki Shibata1, Asyraf Mohamed Aminuddin2, Ryoko Senda3, Tomoaki Morishita2(1. Hiroshima Univ., 2. Kanazawa Univ., 3. Kyushu Univ.)

Keywords:

Oman drilling project,CM1A site,crust-mantle transition zone,Sr isotopic ratio

We analyzed Sr isotopic ratios of gabbros and peridotites (dunite and harzburgite) collected from the drilling CM1A site that penetrates the crustal-mantle boundary of the Wadi Tayin massif in the southern Oman ophiolite. The Sr isotope ratios show good correlation with degree of alteration and estimated Sr isotope ratio of the solution circulated in peridotites is around 87Sr/86Sr = 0.7040.