桂西北南丹地区大厂超大型锡多金属矿床中发现高稀土元素方解石  

Discovery of high-REE calcites in the Dachang superlarge tin-polymetallic ore deposit, Nandan, northwestern Guangxi.

作　　者：王登红[1] 李华芹[2] 陈毓川[3] 屈文俊[4] 梁婷[5] 应立娟[1] 韦可利 刘孟宏 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037 [2]中国地质调查局宜昌地质矿产研究所,湖北宜昌443003 [3]中国地质科学院,北京100037 [4]国家地质实验测试中心,北京100037 [5]长安大学,陕西西安710000 [6]广西南丹大厂锡矿,广西南丹547207

出　　处：《地质通报》2005年第2期176-180,共5页Geological Bulletin of China

基　　金：中国地质调查局地质调查项目<中国成矿体系与区域成矿评价>;国家科技攻关项目<中国西部优势矿产资源潜力评价技术及示范研究>(2003BA612A-01);国家重点基础研究发展规划973项目(编号G1999043201;G1999043203)的成果

摘　　要：广西大厂锡多金属矿床是中国也是世界上最大的锡多金属矿床之一,其锡、锌、锑、砷、银、铟、镓等金属元素均达到大型超大型规模。通过对大厂矿区91号、92号和100号矿体中矿石内非金属矿物稀土元素的研究,发现91号和92号矿体中均存在高稀土元素含量的方解石,ΣREE的最高含量达940.42×10-6,平均799.2×10-6。高稀土元素含量方解石的存在,表明在大厂超大型矿床的形成过程中可能有幔源流体的参与。The Dachang tin-polymetallic ore deposit, Guangxi, is one of the largest tin deposits both in China and abroad, with its reserves of Sn, Zn, Sb, As, Ag, In and Ga reaching large or superlarge size. This paper reports the new results of studies on rare earth elements (REE) in nonmetallic minerals of the orebodies 91#, 92# and 100# orebody in the Dachang mining area. The authors find that there exist special calcites with high REE contents in the 91# and 92# orebodies. The REE content may reach a maximum of 940.42×10-6 with an average of 799.2 ×10-6. Generally, high REE contents of calcites have a genetic relationship with mantle-derived fluids. So, the existence of the special calcite with a high content of REE in the Dachang mining area suggests that mantle-derived fluids may have contributed to the formation of this deposit.

关 键 词：广西大厂 锡多金属矿床 超大型矿床 方解石 稀土元素 

分 类 号：P618.44[天文地球—矿床学] P578.61[天文地球—地质学]