渤海西部表层沉积物中黏土矿物分布特征及物源指示

发布时间：2018-01-01 14:38

本文关键词：渤海西部表层沉积物中黏土矿物分布特征及物源指示　出处：《海洋地质与第四纪地质》2017年01期 　论文类型：期刊论文

【摘要】：利用X射线衍射分析得到渤海西部海域45个站位表层沉积物中4种主要黏土矿物分布及组合特征。结果显示:伊利石(43.1%~74.6%)含量最高,蒙脱石(5.2%~48.4%)次之,较低的高岭石含量(2.7%~9.9%)和绿泥石含量(3.0%~12.0%);组合类型以(Ⅰ)型伊利石-蒙脱石-高岭石-绿泥石组合占绝对优势,其次是(Ⅱ)型伊利石-蒙脱石-绿泥石-高岭石组合。渤海西部表层沉积物中黏土矿物成因以陆源物质为主,其供给来源多是黄河、海河、滦河等沿岸河流入海物质。研究区可划分3个不同物源沉积区:西部的海河-黄河型物源沉积区;北部的滦河物源沉积区;中东部和南部的黄河型物源沉积区。渤海西部表层沉积物黏土矿物分布和组合特征受控于沉积物物源和渤海环流影响。
[Abstract]:The distribution and assemblage characteristics of four major clay minerals in the surface sediments of 45 stations in the western Bohai Sea were obtained by X-ray diffraction analysis. The results show that the content of Illite 43.1% is the highest. The lower kaolinite content was 2.7and 9.9cm), and the chlorite content was 3.0and 12.0%, the second was the content of montmorillonite 5.2and 48.4%, and the lower content of kaolinite was 2.7and 9.9. (I) Illite-montmorillonite-kaolinite-chlorite combination is the dominant type. The second type is Illite-montmorillonite chlorite kaolinite assemblage. The clay minerals in the surface sediments of the western Bohai Sea are mainly derived from land-based materials and are mainly supplied from the Yellow River and Haihe River. The study area can be divided into three different provenance sedimentary areas: the Haihe-Yellow River type sediment area in the west; Luanhe provenance sedimentary area in the north; The distribution and assemblage of clay minerals in the surface sediments of the western Bohai Sea are controlled by the sediment source and the circulation of the Bohai Sea.
【作者单位】：中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室;国土资源部海洋油气资源与环境地质重点实验室青岛海洋地质研究所;
【基金】：国家专项海洋基础地质调查(1212011220113) 中国地质调查局项目(GZH201400205)
【分类号】：P736.21
【正文快照】： 黏土矿物是气候、物源、水介质条件受沉积、成岩作用综合影响的产物,分布于地表各类沉积物内,海洋沉积物是其重要的组成,且黏土矿物在浅海沉积物总量中占30%以上[1]。由于其独特的粒径、结构、组成成分特点,且对地质过程和环境演化的响应灵敏,因此可以通过分析沉积物黏土矿物

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