Chemical composition of marine surface sediments around Tokara Islands (GB21-2 and 21-3 Cruise), Japan

KUBOTA Ran, OHTA Atsuyuki, TACHIBANA Yoshiko, ITAKI Takuya, KATAYAMA Hajime, SUZUKI Yoshiaki, MANAKA Mitsuo

doi:10.9795/bullgsj.74.5-6_287

Bibliographic Information

Other Title

トカラ列島周辺海域（GB21-2 および21-3 航海）で採取された海底堆積物の化学組成

Abstract

<p>The concentrations of 24 elements in the 90 marine surface sediment samples collected from around Tokara Islands, were determined, and the characteristics of the chemical composition and concentration distribution were investigated. The sediments in this sea area are considered to be derived from three sources: bioclasts rich in CaO and Sr, mafic clastic materials rich in T-Fe₂O₃ and MgO, and felsic clastic materials rich in K₂O. The contribution of the three sources differs depending on the sampling area. The analysis results of the relationship between the concentrations of each element suggests that the contribution of mafic clastic particles is particularly large　in the off eastern Suwanose Island (Central zone of Tokara Islands). Samples having high Cu concentrations are distributed mainly in the Central zone of Tokara Islands, although they are not always enriched in T-Fe₂O₃ and TiO₂ concentrations. The high Cu concentration samples in Southern zone of Tokara Islands would be influenced by the early diagenesis process because they are also abundant in MnO concentrations.</p>

Journal

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN 74 (5-6), 287-300, 2023-12-28

National Institute of Advanced Industrial Science and Technology, Geological Survey of Japan

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Details 詳細情報について

CRID: 1390017289897051136

DOI: 10.9795/bullgsj.74.5-6_287

ISSN: 2186490X; 13464272

Web Site: https://www.jstage.jst.go.jp/article/bullgsj/74/5-6/74_287/_pdf

Text Lang: ja

Data Source

JaLC
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Abstract License Flag: Disallowed

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