山西省兴县铝土矿稀土元素地球化学特征及其地质意义  

REE Geochemical Characteristics and Geological Significance of Bauxite from Xing County,Shanxi Province

作　　者：张尚清 张文旭 钟庄华 赵军 孙凯 曹亚琪 Zhang Shangqing;Zhang Wenxu;Zhong Zhuanghua;Zhao Jun;Sun Kai;Cao Yaqil(College of Resource Science, Hebei GEO University, Shijiazhuang 050031, China;Shanxi Provin- cial Third Institute of Geological Engineering Investigation, Jinzhong 030620, China)

机构地区：[1]河北地质大学资源学院,河北石家庄050031 [2]山西省第三地质工程勘察院,山西晋中030620

出　　处：《中国稀土学报》2018年第3期338-349,共12页Journal of the Chinese Society of Rare Earths

基　　金：山西省国土资源厅价款项目D(1402013050002779);中国铝业公司地勘基金项目(T14120100602041622;T14320110102043675)联合资助

摘　　要：兴县铝土矿是山西霍西—河东铝土矿成矿带的典型代表,为喀斯特型铝土矿。为进一步研究兴县铝土矿成因,以兴县铝土矿样品为研究对象,分析了稀土元素REE含量和地球化学特征。通过研究发现:兴县铝土矿稀土元素总量较高,轻稀土富集,重稀土呈现不同程度的亏损。稀土元素分布模式及Eu异常分析,认为兴县铝土矿主要物质可能来源于下部奥陶系灰岩,同时混入了其他少量的铝硅酸盐矿物;从本区铝土矿稀土元素中Ce异常和La/Y比值情况显示,铝土矿形成于偏氧化性—碱性的海陆过渡相环境;另外通过比对一些国内外的喀斯特型铝土矿,发现兴县铝土矿稀土元素含量非常高,具有巨大的潜在经济价值。The Xing county bauxite is a typical representative of Shanxi Huoxi-Hedong bauxite metallogenic belt,which is karst bauxite. In order to further analyze the causes of bauxite in Xing County,the REE content and geochemical characteristics of REE in Xing County bauxite samples was studied. The geochemical data of rare-earth el-ement in bauxite showed that ΣREE in the region is high,and the LREE are enriched in the samples,and the HREE have different losses. Based on the rare earth element distribution model and Eu anomaly analysis,it is believed that the main material of Xing county bauxite may be derived from the under Ordovician limestone. At same time it maybe mixed with other small amount of aluminosilicate minerals. From Ce anomaly,La/Y ratio in bauxite at this area,the bauxite formed a partial oxidation-alkaline environment which was transitional facies. In addition,by comparing some domestic and foreign karst bauxite,it was found that rare earth inside the bauxite in Xing County is very high with great potential economic value.

关 键 词：稀土元素 物质来源 成矿环境 兴县铝土矿 

分 类 号：P595[天文地球—地球化学]