The characteristics of the seafloor massive sulfide deposits at the hakurei site in the izena hole, the middle okinawa trough

Ryoto Yoshizumi, Youko Miyoshi, Jun Ichiro Ishibashi

研究成果: 著書/レポートタイプへの貢献

4 引用 (Scopus)

抜粋

The seafloor massive sulfide (SMS) deposits, which were found in the Izena Hole, the middle Okinawa Trough, show two modes of occurrence, namely, large sulfide mounds on the seafloor and massive sulfide bodies beneath sediments. A 610-cm long sequence of alternating beds of sediment and ore layers was drilled to investigate the lower ore body, at high rates of core recovery (average 64 %), at the northern part of the Hakurei Site in the Izena Hole, the middle Okinawa Trough. Observation on polished sections of the core samples under reflection microscope indicates that the ores (18–166 cmbsf (cm below seafloor)) above the sediment layer (166–221 cmbsf) are porous and contain acicular barite and globular sphalerite with small barite inclusions. These textures are considered to have formed as a result of rapid cooling. On the other hand, ores (221–510 cmbsf) below the sediment layer (166–221 cmbsf) had a massive layer of sphalerite and galena on top (black ore), a middle layer of pyrite and chalcopyrite-rich layer (yellow ore) and a bottom layer of sphalerite and large barite.

元の言語英語
ホスト出版物のタイトルSubseafloor Biosphere Linked to Hydrothermal Systems
ホスト出版物のサブタイトルTAIGA Concept
出版者Springer Japan
ページ561-566
ページ数6
ISBN(電子版)9784431548652
ISBN(印刷物)9784431548645
DOI
出版物ステータス出版済み - 1 1 2015

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

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  • これを引用

    Yoshizumi, R., Miyoshi, Y., & Ishibashi, J. I. (2015). The characteristics of the seafloor massive sulfide deposits at the hakurei site in the izena hole, the middle okinawa trough. : Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept (pp. 561-566). Springer Japan. https://doi.org/10.1007/978-4-431-54865-2_43