海洋学研究 ›› 2019, Vol. 37 ›› Issue (4): 60-67.DOI: 10.3969/j.issn.1001-909X.2019.04.006

• 研究论文 • 上一篇    下一篇

西太平洋马尔库斯-威克海山区沉积物中生物硅含量分布

孟凡盛1,2, 倪建宇*1,2, 姚旭莹1,2   

  1. 1.自然资源部 第二海洋研究所,浙江 杭州 310012;
    2.国家海洋局 海底科学重点实验室,浙江 杭州 310012
  • 收稿日期:2019-03-18 修回日期:2019-05-30 出版日期:2019-12-15 发布日期:2022-11-10
  • 通讯作者: *倪建宇(1969-),男,研究员,主要从事海洋地球化学和海洋环境化学研究。E-mail: jianyuni@sio.org.cn
  • 作者简介:孟凡盛(1992-),男,山东东营市人,主要从事海洋地质地球化学研究。E-mail:fansheng92@gmail.com
  • 基金资助:
    中国大洋矿产资源研究与开发专项基金资助(DY135-S1-1-08)

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

摘要: 分析了大洋40航次在西太平洋马尔库斯-威克海山区山间海盆采集的表层沉积物中生物硅和有机质的含量,并对其分布特征和来源进行了初步的研究。结果表明,马尔库斯-威克海山区附近海域深海表层沉积物中生物硅含量总体较低,含量在0.88%~12.41%之间,平均含量为2.19%,分布上呈现西南含量高,向东北方向递减的趋势;深海表层沉积物中有机碳含量较低,δ13C同位素组成分布与生物硅相同。沉积物柱状样的研究表明研究区在过去的100~200 ka期间表层水体中硅质生物的初级生产力是逐渐增加的。

关键词: 西太平洋, 生物硅, 沉积物

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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