渝南大佛岩矿区铝土矿碎屑锆石中钪的赋存形式研究  

Existing Form of Scandium in Detrital Zircon from Bauxite of the Dafoyan Mine,Southern Chongqing

作　　者：李军敏[1] 陈莉[1] 徐金沙[1] 闫武[2] 吕涛[1] 杨波[1] 陈阳[3] 

机构地区：[1]成都地质矿产研究所,成都610082 [2]中国地质科学院矿产综合利用研究所,成都610055 [3]中国地质科学院,北京100037

出　　处：《沉积学报》2013年第4期630-638,共9页Acta Sedimentologica Sinica

基　　金：中国地质调查局"渝东地区地质构造演化及铁铝基地研究(1212011085167)";重庆市大佛岩;吴家湾;申基坪铝土矿区铝土矿伴生钪;锂;镓综合评价资助

摘　　要：以渝南大佛岩矿区含矿岩系铝土质黏土岩为研究对象,通过淋滤实验证明其中钪并非以独立矿物形式和大量离子吸附形式存在的。由于铝土矿含矿层位缺少有机质,也排除了钪与有机质结合的可能性。基于扫描电镜和能谱分析的结果,发现其中的碎屑锆石富含钪元素,钪广泛分布于碎屑锆石表面,且分布非常不均匀,最高重量百分比可达2.75%,最低低于检测线,且在锆石的凹坑、裂隙与锆石上重矿物的钪含量普遍较高。结合钪易与锆发生极性类质同象的特性,本研究认为该矿区原矿石碎屑锆石中的钪,很可能有类质同象、离子吸附和超显微非结构混入物三种形式。此研究成果将对今后渝南地区铝土矿伴生钪的开发利用提供理论参考依据。The study of aluminum clay rock of Dafoyan mining area proves that the scandium does not exist in the form of independent minerals and ion adsorption.There is nearly no organic matter in bauxite ore-bearing horizon and we can also ruled out the possibility of the scandium integrate with organic matter.We find the scandium is rich in detrital zircon,base on the results of the SEM and the analysis of spectrum.The scandium widespread distribute on the surface of detrital zircons,and there are different percentage composition of scandium in different parts of the detrital zircon,the maximum is 2.75%,and the minimum is not detected scandium,moreover the percentage composition of scandium in the pits or cracks are higher frequently.So,we consider that there are likely three forms of scandium in detrital zircons： isomorphism,ion-adsorption and the microscopic structure of the mixed in with content.These researches will provide a theoretical basis for the development and utilization of the bauxite in southern Chongqing in future.

关 键 词：钪 赋存形式 碎屑锆石 铝土矿 渝南地区 

分 类 号：P611.21[天文地球—矿床学]