冲绳海槽北部现代沉积物地球化学研究
- 1. 中国科学院海洋研究所, 青岛 266071;
- 2. 青岛第一轻工业学校, 青岛 266073;
- 3. 国家海洋局第一海洋研究所, 青岛 266071
基金项目:
中国科学院海洋研究所调查研究报告第2901号国家自然科学基金资助项目(49625609)
作者简介:
翟世奎,男,38岁,研究员,博士生导师,沉积学,矿床地球化学.
- 收稿日期:
1996-09-10
- 刊出日期:
1997-12-31
摘要: 本文对冲绳海槽北部(126°30′-129°30′E;28°30′-32°00′N)现代海底表层沉积物的沉积物地球化学特征进行了系统的分析,探讨了分别代表陆源、火山源和生物源沉积物的地球化学指标。结果表明,SiO2主要富集于东海外陆架与陆架坡折带,基本上反映了陆源碎屑沉积或东海陆架外缘的残留砂沉积;Al2O3和Na2O的含量分布明显与玻屑砂或火山玻璃的含量有关;CaO或CaCO3代表了生物沉积组份的多寡;MgO、TFe2O3、TiO2、K2O、MnO、P2O5、L.O.I对应于调查区的细粒沉积物。Rb、Ba、Zn和Cr等微量金属元素主要富集于粉砂粘土级细粒沉积物中,但Sr主要富集在生物组份中。绝大多数化学组份的分布呈现出以海槽中轴线为界分为东、西两个区的格局,说明无论从沉积物源上,还是从沉积环境上讲,调查区东、西两侧都有着极为重要的差异。在沉积学上海槽中轴线是一明显的分界线。
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.
翟世奎, 张杰, 何良彪, 仲娟, 陈长安. 冲绳海槽北部现代沉积物地球化学研究[J]. 沉积学报, 1997, 15(S1): 8-15.
| 引用本文: |
翟世奎, 张杰, 何良彪, 仲娟, 陈长安. 冲绳海槽北部现代沉积物地球化学研究[J]. 沉积学报, 1997, 15(S1): 8-15.
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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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