日本地球惑星科学連合2018年大会

講演情報

[EE] 口頭発表

セッション記号 S (固体地球科学) » S-CG 固体地球科学複合領域・一般

[S-CG54] ハードロック掘削 オマーンから海洋リソスフェア,島弧形成+

2018年5月21日(月) 13:45 〜 15:15 A09 (東京ベイ幕張ホール)

コンビーナ:高澤 栄一(新潟大学理学部地質科学科)、道林 克禎(名古屋大学大学院環境学研究科地球環境科学専攻地質・地球生物学講座岩石鉱物学研究室)、Peter B Kelemen (共同)、Damon A H Teagle (Ocean & Earth Science, National Oceanography Centre Southampton, University of Southampton, SO14-3ZH, Southampton, UK)、座長:Kelemen Peter(Columbia University)、森下 知晃(金沢大学)

14:30 〜 14:45

[SCG54-09] 海洋下部地殻の白金族元素存在度とオスミウム同位体比:ICDPオマーン掘削試料から

*仙田 量子1,2鈴木 勝彦2 Phase I Science Party The Oman Drilling Project (1.九州大学比較社会文化研究院、2.海洋研究開発機構)

キーワード:白金族元素、Os同位体組成、はんれい岩、オマーン掘削計画、ICDP

It is well known that oceanic crust covers almost 70 % of Earth’s surface. It is formed at mid-ocean ridge and is subducted into mantle at convergent plate margin. However the details of the oceanic crusts are still poor understanding because they are underlying the sea water. Therefore the construction of the oceanic crusts is defined by constructions of ophiolites which were the ancient oceanic plates exposed onto land.
To have better understandings of the oceanic crust and related other things, the Oman Drilling Project starts the drilling in the oceanic lower crustal section from 2016 to 2017 in Samail ophiolite, Oman. The Samail ophiolite in the Oman is the largest and having better exposed section of the oceanic lithosphere in the world.
This time we will report the preliminary data of the PGE abundances and Os isotope ratios in the whole-rock gabbros and compering to the data from the other areas and settings. These data will be help us to better understanding of the relationships between the oceanic crust and underlying mantle and planning the future Mohole projects.