黄祥林,陆刚,高杨,凌绍年,吴立河,周娟娟,钟锋运

• 1:广西壮族自治区区域地质调查研究院
• 2:广西310核地质大队

摘要(Abstract)：

广西东平锰矿是一个大型红土型锰矿床,分为原生锰矿含矿层和次生锰矿含矿层。由于历史原因,绝大部分学者将原生锰矿含矿层的地层归属浅水台地相的北泗组。区调中,根据矿区实测剖面的岩石组合、沉积相特征及古生物特征与标准剖面的对比,将赋矿地层归属于石炮组,并新建东平层,代表含锰地层。在赋矿地层下部的泥岩层中采获Claraiasp.等早三叠世双壳类及菊石化石,LA-ICP-MS法测得赋矿地层顶部火山碎屑岩中锆石U-Pb年龄为251.5±2.5Ma,在火山碎屑岩层之上采获中三叠世双壳类和菊石,确定锰矿赋矿地层的时代为早三叠世中晚期。

关键词(KeyWords)： 资源地层;赋矿地层;LA-ICP-MS;北泗组;石炮组;三叠系;东平锰矿;广西

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局“扬子陆块及周缘地质矿产调查工程”公益性基础地质调查项目(12120113063500)资助

作者(Author): 黄祥林,陆刚,高杨,凌绍年,吴立河,周娟娟,钟锋运

DOI: 10.19839/j.cnki.dcxzz.2017.03.007

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