覃斌贤,潘明,马小林,林宇,周嘉铭,韦伟,廖家飞

• 1:中国地质科学院岩溶地质研究所
• 2:自然资源部/广西岩溶动力学重点实验室
• 3:联合国教科文组织国际岩溶研究中心
• 4:广西平果喀斯特生态系统国家野外科学观测研究站

摘要(Abstract)：

广西宜州—忻城一带是南岭成矿带石炭纪沉积型锰矿主要富集区,锰矿赋存于石炭系巴平组中,然而该区锰矿的具体成矿时代仍缺乏精确的时间约束。本文对忻城马泗锰矿钻孔ZK2803开展详细的牙形石分类学和生物地层学研究,共采集53件碳酸盐岩岩芯样品,经处理后在37件样品中获得牙形石,共鉴定出7属31种/亚种(包括相似种)。根据牙形石的产出特征,自下而上识别出巴什基尔阶4个牙形石带,分别为Declinognathodus noduliferus sensu lato带、Idiognathoides sulcatus sulcatus带、Idiognathoides sinuatus带和Neognathodus symmetricus带,这些牙形石带可与国内外同期牙形石带对比。基于详细的牙形石材料,南岭地区石炭系巴平组碳酸锰的沉积时限被厘定为宾夕法尼亚亚纪巴什基尔早期的D. noduliferus带上部至Id. sulcatus sulcatus带。

关键词(KeyWords)： 牙形石;锰矿;石炭纪;巴平组;广西

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局地质调查项目(DD20250004,DD20242650)资助

作者(Author): 覃斌贤,潘明,马小林,林宇,周嘉铭,韦伟,廖家飞

DOI: 10.19839/j.cnki.dcxzz.2025.0013

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