广东省电白区滨海砂矿型钍资源成矿特征  

Metallogenic Features of Coastal Placer Thorium Resources in Dianbai Area,Guangdong Province,China

作　　者：孟艳宁[1] 范洪海 陈金勇[1] MENG Yanning;FAN Honghai;CHEN Jinyong(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院中核铀资源勘查与评价技术重点实验室,北京100029

出　　处：《世界核地质科学》2022年第3期469-477,共9页World Nuclear Geoscience

基　　金：“十四五”预研项目“钍资源高效预测与潜力评价技术”资助。

摘　　要：我国沉积砂矿型钍资源丰富,其中滨海砂矿型钍资源是目前最重要的可利用钍资源,我国东南沿海是滨海砂矿型钍资源的主要分布区。通过对广东省电白地区滨海砂矿的调查,查明了滨海砂的含钍性、砂矿的物质组成以及分布特征;重砂样品微量元素分析显示电白砂矿物源单一,均来自该区西侧花岗岩。同时样品锆石铀铅定年数据表明,西部花岗岩的年龄为441~446 Ma,为晚奥陶世花岗岩。综合其成矿物质来源、地形地貌及构造环境,探讨了电白地区滨海砂矿的成矿过程,为我国沉积砂矿型钍资源的勘查和开发提供了参考。Thorium resource of sedimentary type is plenty in China,in which coastal placer is the most important type for utilization.Through the survey and analysis of coastal placer in Dianbai area,Guangdong province,the bearing property,mineral composition and distribution characteristics are studied.Trace element analysis of heavy placer samples shows that the provenance of Dianbai placer is simply from the granite in the northwest and the zircon U-Pb dating is 441~446 Ma which indicates the provenance granite is late Ordovician.The provenance,topographic and tectonic features in Dianbai area are used to discuss the metallogenic process of the placer Th resource to provide references for the exploration and development of the thorium resources.

关 键 词：钍资源 重砂矿物 滨海砂矿 广东电白 

分 类 号：P619.13[天文地球—矿床学] P736.2[天文地球—地质学]