タングステン同位体トレーサーによるコア_-_マントル相互作用の検証

SAHOO YuVin; 中井 俊一; ALI Arshad

doi:10.14862/geochemproc.51.0.64.0

51th Annual Meeting of the Geochemical Society of Japan

Session ID : 1D06

DOI https://doi.org/10.14862/geochemproc.51.0.64.0

Conference information

Host: The Geochemical Society of Japan

Co-host: The Chemical Society of Japan

rock/crust, ore deposits

Investigations on core-mantle interaction with a tungsten isotopic tracer

YuVin SAHOO, *Shun'ichi NAKAI, Arshad ALI

Author information

Keywords: tungsten isotopic tracer, core-mantle interaction, ICP-MS, chemical separation, Isotopic measurements

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Seismic tomography revealed that the roots of magmas of several oceanic islands reached core-mantle boundary. We have been investigating to obtain the proof of core-mantle interaction with a tungsten isotopic tracer. It is expected that the core has a different 182W/183W from that of the silicate mantle with a decay of extinct 182Hf. We have improved tungsten separation technique. We can analyze 182W/183W with a precision better than one epsilon unit with a ICP-MS.

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