广西下巴铅锌矿床稀土元素地球化学特征研究  

Research on REE Geochemical Characteristics of the Xiaba Pb-Zn Ore Deposit,Guangxi

作　　者：欧正[1,2] 韦重韬[1] 莫绍文 高贺凤[3] Santigie Kekuda Sesay 邹明俊[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]广西环江金泰矿业有限责任公司,广西环江547100 [3]煤层气资源与成藏过程教育部重点实验室,江苏徐州221008

出　　处：《现代地质》2013年第4期841-846,共6页Geoscience

摘　　要：利用电感耦合等离子体质谱(ICP-MS)分析了广西下巴铅锌矿床中不同矿脉矿石以及围岩中的稀土元素地球化学特征,并对成矿流体的来源进行了探讨。结果表明:下巴铅锌矿床的稀土总量较低,为0.51×10-6～36.53×10-6,LREE/HREE比值相对稳定,介于3.06～6.05之间;在不同类型矿体中,稀土含量和配分模式变化较大,样品测试结果中出现Ce的负异常和Eu的正负两种异常。根据上述结果和矿床特征研究,推断矿床成因为含矿热卤水与深部循环地下热水汇合形成,在特定的物理化学条件下沉淀下来并富集成矿。This paper used inductively coupled plasma mass spectrometry （ ICP-MS） to determine the concentration of rare earth elements （ REE） and the composition of ore and surrounding rocks of Pb-Zn deposit from Xiaba,Guangxi Province,and discussed the geochemical characteristics and the source of ore-forming fluid of the deposit. The results show that the total rare earth content is quite low,ranging from 0. 51 × 10 -6 to 36. 53 × 10 -6 ,while LREE / HREE is about 3. 06 to 6. 05. In different types of ore body,the content and distribution patterns of REE vary in a quite wide range,and negative anomaly for Ce and both positive and negative anomaly for Eu are presented in the samples. Combined with the REE parameters and geological features of the ore,it can be deduced that the metallogenic fluid source of Xiaba deposit is a hybrid of ore-bearing brine and deep circling underground water under special physical-chemical condition.

关 键 词：稀土元素地球化学 矿石来源 铅锌矿床 广西下巴 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]