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东太平洋海盆430柱沉积物特征与地层
引用本文:沈华悌. 东太平洋海盆430柱沉积物特征与地层[J]. 海洋学研究, 1999, 17(3): 1-8
作者姓名:沈华悌
作者单位:国家海洋局第二海洋研究所!浙江杭州310012
摘    要:对东太平洋海盆 430 柱沉积物的组分、古生物、结构构造以及古地磁、铀系等进行研究后, 将沉积物进行分类、命名与分层, 并确定其年代。研究表明, 本柱由下至上的沉积物分别为含沸石粘土、深海粘土、硅质粘土和钙质粘土。该柱中存在 4 个沉积间断, 其中在 325 cm附近层位有一厚约 10 cm 的多金属结核层,此界面为中中新世至晚上新世的沉积间断,它在 C C区内普遍存在, 持续时间长, 分布范围广。反映此时南极底层流十分强盛, 对东太平洋 C C 区的沉积作用和多金属结核形成与发育产生重要的影响。

关 键 词:430柱  沉积物与地层  东太平洋海盆

The characteristic of sediment and its strata of Core 430 from the East Pacific Ocean
SHEN Hua|ti. The characteristic of sediment and its strata of Core 430 from the East Pacific Ocean[J]. Journal of Marine Sciences, 1999, 17(3): 1-8
Authors:SHEN Hua|ti
Abstract:The components, fossils, structure, paleomeganetism and uranium series of the sediments of Core 430 were studied, they were also classified, named, stratified and chronicled, which shows that from the bottom up the types of sediments are zeclite|bearing clay, deep|sea clay, siliceous clay and calcareous clay. There are 4 hiatuses in this core. Among them, one hiatus is at the depth of 325 cm, where buried polymetallic nodules about 10 millimeters thick are found. It is occurred from Middle Miocene to Late Pliocene. In C|C (Clarrion and Clipperton )zone, this hiatus is extensively presented. It is reflected that the Antarctic bottom water was strong in this period, which put great effect on both the sedimentation of the East Pacific Ocean and the growth of polymetallic nodules.
Keywords:Core  sediments and strate  the East Pacific Ocean
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