Journal of Marine Sciences ›› 2019, Vol. 37 ›› Issue (4): 60-67.DOI: 10.3969/j.issn.1001-909X.2019.04.006

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Biogenic silica content and distribution in deep sea sediments at Marcus-Wake Seamounts area in the western Pacific Ocean

MENG Fan-sheng1,2, NI Jian-yu*1,2, YAO Xu-ying1,2   

  1. 1. Second Institute of Oceanography, MNR, Hangzhou 310012, China;
    2. Key Laboratory of Submarine Geosciences, SOA, Hangzhou 310012, China
  • Received:2019-03-18 Revised:2019-05-30 Online:2019-12-15 Published:2022-11-10

Abstract: In this study, the content of bio-silicon and organic matter in the surface sediments were analyzed, which were collected by the Ocean 40 voyage in the mountain basin of the Marcus-Wick Sea area in the western Pacific, and the preliminary research on its distribution characteristics and sources were also conducted. The results show that the content of bio-silicon in the deep sea surface sediments near the Marcus-Wicker Sea area is generally low, ranging from 0.88% to 12.41%, with an average content of 2.19%. The distribution shows a high content in the southwest and a diminishing trend toward the northeast. The content of organic carbon in the surface sediments is low, and the distribution of δ13C is the same as that of bio-silicon. Sediment core studies show that the primary production of siliceous organisms in the surface waters of the study area during the past 100-200 ka is gradually increasing.

Key words: western Pacific Ocean, biogenic silica, sediments

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