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Article Navigation >  Acta Sedimentologica Sinica  > 1997  >  15(S1): 8-15

Zhai Shikui, Zhang Jie, He Liangbiao, Zhong Juan, Chen Changan. Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough[J]. Acta Sedimentologica Sinica, 1997, 15(S1): 8-15.
Citation: Zhai Shikui, Zhang Jie, He Liangbiao, Zhong Juan, Chen Changan. Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough[J]. Acta Sedimentologica Sinica, 1997, 15(S1): 8-15.
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Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough

  • 1.

    Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071;

  • 2.

    Qingdao First High School of Light Industry,Qingdao 266073;

  • 3.

    First Institute of Oceanography,State Ocean Administration,Qingdao 266001

  • Received Date: 1996-09-10
  • Publish Date: 1997-12-31
  • Systematic analyses on the seafloor surface sediments of the north Okinawa Trough were carried out to seek for geochemicalindexes respectively representing terrigenous, volcanic and biogenic sediments. Research results showed that SiO2 was riched in thezone of the outer shelf edge and shelf break where the terrigenous sediments and relict sediments were dominant. A12O3and Na20contents were the indexes representing volcanic materials, and Ca0 or total carbonate indicating the biogenic deposits. In addition,MgO, Fe203, Ti02, K2O2MnO1 P2O5, LOI (loss by ignition) and most trace metals, such as Rb, $a, Zn and Cr were compara-tively enriched in the fine sediments. Stronsium concentration had close relationship with proportion of the biogenic components inthe sediments. Distributions of most chemical rnmponents presented a pattern which was devided into the east area and west area by the mid-dle axis line of the Okinawa Trough, suggesting important differences existing between the two areas in the both sediment resourceand sedimentary environment. The middle axis line of the trough was a natural boundary in sedimentology.
  • [1] 吴明清，王贤觉.冲绳海槽沉积物的化学成分特征及其地质意义.海洋与湖沼，1988,19(6):585-593.
    [2] 吴明清.冲绳海槽沉积物稀土和徽盈元素的某些地球化学特征.海洋学报，1991,13(1):75-81.
    [3] 陈丽蓉等.冲绳海槽的矿物组合、物质来源及原始岩浆性质的初步探讨.海洋与湖沼.1986,17(1) : 3-12
    [4] 赵一阳等.冲绳海槽沉积物地球化学的基本特征.海洋与湖沼，1984,15(4):371-378.
    [5] 秦蕴珊，赵一阳，陈丽蓉.赵松龄主编.东海地质.1987.北京:科学出版社.
    [6] 翟世奎.冲绳海槽浮岩的分布及其斑晶矿物学特征.海洋与湖沼.1986,17(6):504-512.
    [7] 翟世奎等.冲绳海槽北部稀土元素积物地球化学研究.海洋地质与第四纪地质，1996.16(2):48-56.
    [8] 潘志良，石斯器.冲绳海槽沉积物及其沉积作用的研究.海洋地质与第四纪地质,1986.(1):17-29.
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  • Received:  1996-09-10
  • Published:  1997-12-31

Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough

  • 1. Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071;
  • 2. Qingdao First High School of Light Industry,Qingdao 266073;
  • 3. First Institute of Oceanography,State Ocean Administration,Qingdao 266001
  • Received Date: 1996-09-10
  • Publish Date: 1997-12-31

Abstract: Systematic analyses on the seafloor surface sediments of the north Okinawa Trough were carried out to seek for geochemicalindexes respectively representing terrigenous, volcanic and biogenic sediments. Research results showed that SiO2 was riched in thezone of the outer shelf edge and shelf break where the terrigenous sediments and relict sediments were dominant. A12O3and Na20contents were the indexes representing volcanic materials, and Ca0 or total carbonate indicating the biogenic deposits. In addition,MgO, Fe203, Ti02, K2O2MnO1 P2O5, LOI (loss by ignition) and most trace metals, such as Rb, $a, Zn and Cr were compara-tively enriched in the fine sediments. Stronsium concentration had close relationship with proportion of the biogenic components inthe sediments. Distributions of most chemical rnmponents presented a pattern which was devided into the east area and west area by the mid-dle axis line of the Okinawa Trough, suggesting important differences existing between the two areas in the both sediment resourceand sedimentary environment. The middle axis line of the trough was a natural boundary in sedimentology.

Zhai Shikui, Zhang Jie, He Liangbiao, Zhong Juan, Chen Changan. Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough[J]. Acta Sedimentologica Sinica, 1997, 15(S1): 8-15.
Citation: Zhai Shikui, Zhang Jie, He Liangbiao, Zhong Juan, Chen Changan. Study on Geochemistry of Seafloor Surface Sediments in the North Okinawa Trough[J]. Acta Sedimentologica Sinica, 1997, 15(S1): 8-15.
shu

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