南海西北部陆架表层沉积物稀有金属矿物及相关元素的分布特征与影响因素

发布时间：2018-04-21 10:46

本文选题：稀有金属矿物 + 稀有金属元素　；参考：《矿物学报》2016年03期

【摘要】：对南海西北部近海陆架273个站位表层沉积物稀有金属矿物进行了研究,并结合沉积物粒度和沉积物类型,及与之相关的稀有金属元素分析,探讨了研究区稀有金属矿物的分布特征及主要影响因素。结果表明,本区沉积物中稀有金属矿物的分布主要受沉积物物源、沉积物类型和水动力条件等因素的控制,稀有金属矿物与相关元素的分布存在较大差异,不能仅凭沉积物中相关元素的质量分数分布来确定金属砂矿的有利富集或成矿区。根据沉积物中稀有金属矿物质量分数的分布特征及沉积环境分析,初步划分出5个稀有金属矿物富集区,分别对应于水东湾及附近海域、珠江口南外海、上下川岛与海陵岛之间外海、湛江湾及附近海域和海南岛东南近岸海域,且每个海域富集的稀有金属矿物种类有所不同,有望成为本区不同种类稀有金属砂矿的有利成矿区,其中钛铁矿、锆石和白钛石是本区最有成矿潜力的稀有金属矿种。
[Abstract]:Rare metal minerals in the surface sediments of 273 stations in the offshore shelf of northwest South China Sea were studied, and the grain size and sediment types of sediments, as well as the related rare metal elements were analyzed. The distribution characteristics and main influencing factors of rare metal minerals in the study area are discussed. The results show that the distribution of rare metal minerals in sediments is mainly controlled by sediment source, sediment types and hydrodynamic conditions, and the distribution of rare metal minerals is different from that of related elements. The beneficial enrichment or mineralization of metallic placer can not be determined by the mass fraction distribution of related elements in sediments. According to the distribution characteristics of rare metal mineral mass fraction in sediments and the analysis of sedimentary environment, five rare metal mineral enrichment areas are preliminarily divided into five regions, corresponding to the Shuidong Bay and the adjacent sea area, and the south coast of the Pearl River Estuary, respectively. The outer sea between Shangxiagawa Island and Hailingdao, the Zhanjiang Bay and its adjacent waters, and the southeast coastal waters of Hainan Island, and the types of rare metal minerals enriched in each sea area are different, which is expected to be a favorable metallogenic area for different types of rare metal placer in this area. Among them, ilmenite, zircon and ilmenite are the most metallogenic rare-metal minerals in this area.
【作者单位】：中国科学院南海海洋研究所边缘海地质重点实验室;中国科学院大学;国土资源部海底矿产资源重点实验室;国家海洋局海岛研究中心;
【基金】：国家自然科学基金委-广东联合基金重点项目(批准号:U1133002) 国土资源部海底矿产资源重点实验室基金(编号:KLMMR-2013-B-07) 中国科学院知识创新工程青年人才领域前沿项目(编号:SQ201306)
【分类号】：P618.6;P736

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