广西大厂石榴石REE含量及Sm-Nd同位素定年  

REE geochemistry and Sm-Nd isotope age of garnet from the Dachang,Guangxi

作　　者：梁婷[1] 王登红[2] 李华芹[3] 黄惠明[4] 王东明[1] 于萍[1] 蔡明海[5] 

机构地区：[1]长安大学成矿作用及其动力学实验室,陕西西安710054 [2]中国地质科学院矿产资源研究所,北京100037 [3]宜昌地质矿产研究所,湖北宜昌443003 [4]柳州华锡集团有限责任公司,广西柳州545006 [5]广西大学资源与环境学院,广西南宁530004

出　　处：《西北大学学报（自然科学版）》2011年第4期676-681,共6页Journal of Northwest University（Natural Science Edition）

基　　金：国土资源部公益性行业基金资助项目(21011046;200911007-6);国家危机矿山接替资源找矿专项典型矿床研究基金资助项目(20089946)

摘　　要：目的查明广西大厂锌铜矿体形成的成矿物质来源和成矿时代。方法锌铜矿体赋矿围岩中钙铝-钙铁榴石的稀土元素含量测定,利用Sm-Nd同位素测年技术,测定了其形成时代。结果大厂锌铜矿体形成的成矿物质来源受地层和岩体双重控制,形成的环境为还原环境,形成时代略晚于95 Ma,与大厂锡多金属矿体是一致的,为燕山晚期。结论燕山晚期是中国东部一次大规模成矿过程,成岩成矿作用与岩石圈伸展作用有关。Aim To determine the source of ore-forming material and the metallogenic epoch. Methods The REE content of andradite-grossular from ore-bearing wall rock in Zn-Cu ore body is analyzed, and age of andradite-grossular is determined by Sm-Nd isotope dating method. Results The source of ore-forming material of Zn-Cu orebody had been controlled by strata and pluton. Ore forming environment is reducing environment. The metallogenic ep- och was slightly later than 95Ma, and the same as tin-polymetalletic ore body, formed in late Yanshan. Conclusion The period was also the large-scale mineralization of the Late Cretaceous in Eastern China, digenesis and miner- alization had been related to the lithosphere extension.

关 键 词：石榴石 稀土元素 SM-ND年龄 锌铜矿体 广西大厂 

分 类 号：P618.43[天文地球—矿床学] P578.94[天文地球—地质学]