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The Characteristics of Trace Element and REE Geochemistry of the Cretaceous Mudrocks and Shales from Southern Tibet and Its Analysis of Redox Condition
Author(s): 
Pages: 730-745
Year: Issue:  7
Journal: Advances in Earth Science

Keyword:  微量、稀土元素底层水体氧化-还原环境含氧环境Cenomanian-Turonian界线球粒陨石标准化;
Abstract: 为了解藏南定日-岗巴盆地和江孜盆地白垩纪沉积时底层水体的氧化一还原环境,采用ICP-MS方法进行微量元素及稀土元素测试分析.结果表明:研究区微量元素在时空上均发生了变化,这与各元素对沉积水体的氧化一还原敏感程度有关.元素Al标准化后变化趋势也不尽相同,其垂向上的变化反映了沉积物底层水体氧化-还原状况、生物产率等沉积环境,与海平面升降、陆源碎屑输入、成岩作用再活化及沉积后氧化作用等多因素有关.V/(...
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