Chrolonological study of drilled cores from active hydrothermal fields in the Okinawa Trough

Ishibashi Jun―ichiro, Itatani Yushi, Onoue Tetsuji, Okazaki Yusuke, Tomita Makiko, Toyoda Shin, Arai Kazuno

doi:10.14862/geochemproc.69.0_94

Bibliographic Information

Other Title

沖縄トラフ熱水域の掘削コア試料を用いた年代学研究

Description

<p>Among sediment cores collected from Ieyama hydrothermal field in the Okinawa Trough, mineralization layers with occurrence of barite and sphalerite were identified between 53-65 mbsf. We have conducted chronological study of barite in the sediment using ²²⁶Ra‐²¹⁰Pb dating and ESR dating. The results yielded 20-90 yrs. and 350-1050 yrs. as formation ages. On the other hand, radiocarbon dating of planktic foraminifera in the surface sediment at 0.15-0.20 mbsf collected from three places in the study field yielded 900‐1500 yrs.There results provide constraint on mineralization process that occurred beneath the seafloor.</p>

Journal

Abstracts of Annual Meeting of the Geochemical Society of Japan

Abstracts of Annual Meeting of the Geochemical Society of Japan 69 (0), 94-, 2022

GEOCHEMICAL SOCIETY OF JAPAN

Keywords

Details 詳細情報について

CRID: 1390294276466835328

DOI: 10.14862/geochemproc.69.0_94

Text Lang: ja

Data Source

JaLC

Abstract License Flag: Disallowed

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