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伊盟隆起东胜地区热演化史与多种能源矿产的关系
任战利 张盛 高胜利 崔军平 刘新社
摘 要:伊盟隆起东胜地区在古生代和中生代早期,地温梯度低,烃源岩热演化程度低,中生代晚期地温梯度增高,地温梯度可达每百米3.3℃.伊盟隆起东胜地区在中生代晚期发生的构造热事件,以及后期的持续抬升是热流体运动活跃时期,并使该区石炭-二叠系、三叠系及侏罗系的煤化作用主要发生在中侏罗--早白垩世,早白垩世是古生代煤系地层的主要生气期,从早白垩世至今为煤成气的主要运移与破坏时期,也是东胜砂岩铀矿主要的成矿时期.通过镜质体反射率、磷灰石裂变径迹等资料对区内构造演化及生烃史的分析,由于伊盟隆起东胜地区石炭-二叠系及侏罗系煤系地层尚处于低成熟或未熟演化阶段,促使铀矿富集的还原剂-油气只能来自伊盟隆起以南成熟度较高地区的石炭-二叠系煤系地层.
关键词:磷灰石裂变径迹;古地温;热演化史;金属铀矿;成藏期次;伊盟隆起;鄂尔多斯盆地
分类号:TE111.1 文献标识码:A
文章编号:0253-9985(2006)02-0187-07
Relationship between thermal history and various energy mineral deposits in Dongsheng area, Yimeng uplift
Ren Zhanli Zhang Sheng Gao Shengli Cui Junping Liu Xinshe
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基金项目:国家重点基础研究发展规划(973)项目(2003CB214605);中国煤成气成藏机制及经济开采基础研究项目(2002CB211704);长江学者和创新团队发展计划资助项目(IRT0559)
作者简介:任战利(1961-),男,博士、研究员、博士生导师,盆地热演化史与油气成藏及油气地质
作者单位:任战利(西北大学,大陆动力学国家重点实验室,陕西,西安,710069;西北大学,陕西,西安,710069)
张盛(西北大学,陕西,西安,710069)
高胜利(西北大学,陕西,西安,710069)
崔军平(西北大学,陕西,西安,710069)
刘新社(西北大学,陕西,西安,710069)
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