滕国超;张霄宇;石学法;陶春晖;黄大松;

• 1:浙江大学地球科学学院
• 2:国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室
• 3:国家海洋局第二海洋研究所国家海洋局海底科学重点实验室

摘要(Abstract)：

沉积物类型和物质来源对于深海固体资源的勘探调查和成矿理论研究具有重要意义。近年来的相关研究表明,中印度洋洋盆南部可能分布富含稀土元素的深海黏土沉积区和含铁锰结核硅质沉积区,但是目前该区域相关研究较少。对大洋第34航次在中印度洋洋盆所获取的BC02站位箱式沉积物样品进行了主量元素、微量元素以及稀土元素含量分析测试,结果表明,研究区沉积物主要为硅质生物沉积,可能有陆源物质和火山物质的输入,但是贡献均较少,没有发现铁锰结核存在,该区域受较强烈的硅质生物沉积稀释作用,区域内稀土元素的质量分数平均值为265.41×10-6,富集程度和富集特征与正常的硅质软泥基本一致,而与中印度洋洋盆和Wharton海盆已经发现的富稀土深海黏土明显不同,沉积环境为稳定的偏氧化环境。

关键词(KeyWords)： 中印度洋洋盆;表层沉积物;地球化学特征;物质来源;沉积环境

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41773005;40706057);; 大洋专项基金项目(DY125-11-R-05)

作者(Author): 滕国超;张霄宇;石学法;陶春晖;黄大松;

Email:

DOI: 10.19509/j.cnki.dzkq.2018.0314

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