赣北修武地区下寒武统黑色岩系地球化学特征与沉积环境判别

• 作 者: 王运 韩秋 伯慧 李文成 王鹤 王涛涛 周胜
• 机 构: 东华理工大学放射性地质与勘探技术国防重点学科实验室,江西省煤田地质勘察研究院,
• 出 处: 甘肃地质
• 发表日期: 2013年03期
• 关键词: 黑色岩系 下寒武统 地球化学特征 修武 轻重稀土 沉积环境 陆源 野外地质调查 干燥气候 大陆边缘

通过野外地质调查、常量及微量地球化学分析等方法,初步查明修武地区下寒武统黑色岩系尤其是石煤中富集钒铀等多金属元素;稀土特征为轻稀土相对富集,轻重稀土分馏程度较高,Ce、Eu均为负异常;黑色岩系是在大陆边缘沉积,沉积环境为干燥气候的还原环境,物源应为陆源和海底热水沉积物两者混合组成,且以陆源为主。

Through field geologic survey, constant and trace geochemical analysis, it can be preliminarily ascertained that the Lower Cambrian black rock series in Xiuwu area, especially the polymetallic elements such as vanadium and uranium enriched in stone coal, are characterized by the relative enrichment of light rare earths, The fractional fractionation of light and heavy rare earths is high, and both Ce and Eu are negative anomalies. The black rock series are sedimentary environment deposited on the continental margin and the sedimentary environment is a dry climate. The source of the black rock series should be a mixed composition of terrigenous and seabed hot-water sediments Land-based.