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基金项目:重庆市科委项目“大巴山南麓城口黑色岩系贵金属成矿性及找矿方向研究”(7582)
作者单位
吴富强, 姚华舟 中国地质调查局武汉地质调查中心 
摘要:
      由于造山带地层系统混乱,部分地区甚至无法恢复、鉴别,给古环境、岩石成因及其成矿性研究带来了困难。以震旦系陡山沱组出露较完整的明月剖面为重点研究对象,通过野外观测和室内综合研究,尝试从稀土元素的配分模式、Eu/Eu*、Ce异常(Ce/Ce*和Ce/Ce**)、微量元素Sr/Ba、Sr-Mn等地球化学特征研究该地区沉积环境以及岩石成因,厘定明月剖面陡山沱晚期沉积环境为大陆边缘沉积环境,指出热水沉积作用对硅质岩成因及成矿性的影响,为下一步找矿提供思路。
关键词:黑色岩系  稀土元素  微量元素  沉积环境  热水沉积  明月剖面  城巴断块  大巴山地区
Abstract:
      The orderless orogenic belt, including irretrievable and unidentifiable regions, has hindered its research of paleoenvironment, petrogenesis, and metallogenesis. Taking the relative complete Mingyue section of Sinian Doushantuo Formation as the key object, with field investigation and indoor comprehensive study, the paper tried to study the sedimentary environment and petrogenesis with respect of rare earth element distribution pattern, Eu/Eu*, Ce anomaly(Ce/Ce* and Ce/Ce**)and trace elements including Sr/Ba and Sr-Mn. The result shows that the sedimentary environment of Mingyue section of the late Doushantuo Stage is of continental margin. Besides, it also indicated that the hot-water sedimentation has a great influence on the genesis and metallogenesis of silicalite, which provides reference to future prospecting. 
Keywords:black lithology  rare earth element  trace element  sedimentary environment  hot-water sedimentation  Mingyue section  Chengba Fault Block  Dabashan area
吴富强, 姚华舟.城巴断块明月剖面陡山沱晚期沉积环境的地球化学特征[J].地质学刊,2017,41(4):529-534