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鄂尔多斯盆地中央古隆起区中寒武统鲕粒碳酸盐岩

徐波 王宝清 孙六一 王红伟 刘宝宪 井向辉 刘丽萍

徐波, 王宝清, 孙六一, 王红伟, 刘宝宪, 井向辉, 刘丽萍. 鄂尔多斯盆地中央古隆起区中寒武统鲕粒碳酸盐岩[J]. 石油实验地质, 2017, 39(1): 24-31. doi: 10.11781/sysydz201701024
引用本文: 徐波, 王宝清, 孙六一, 王红伟, 刘宝宪, 井向辉, 刘丽萍. 鄂尔多斯盆地中央古隆起区中寒武统鲕粒碳酸盐岩[J]. 石油实验地质, 2017, 39(1): 24-31. doi: 10.11781/sysydz201701024
Xu Bo, Wang Baoqing, Sun Liuyi, Wang Hongwei, Liu Baoxian, Jing Xianghui, Liu Liping. Middle Cambrian oolitic carbonate rocks in the central ancient upwelling area, the Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 24-31. doi: 10.11781/sysydz201701024
Citation: Xu Bo, Wang Baoqing, Sun Liuyi, Wang Hongwei, Liu Baoxian, Jing Xianghui, Liu Liping. Middle Cambrian oolitic carbonate rocks in the central ancient upwelling area, the Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 24-31. doi: 10.11781/sysydz201701024

鄂尔多斯盆地中央古隆起区中寒武统鲕粒碳酸盐岩

doi: 10.11781/sysydz201701024
基金项目: 国家自然科学基金项目(51574194)和国家科技重大专项(2016ZX05011-002)资助。
详细信息
    作者简介:

    徐波(1968-),男,博士,教授,从事油气田地质与开发方面的教学与科研工作。E-mail:xsyuxb@126.com。

  • 中图分类号: TE122.2

Middle Cambrian oolitic carbonate rocks in the central ancient upwelling area, the Ordos Basin

  • 摘要: 鄂尔多斯盆地中央古隆起区中寒武统鲕粒碳酸盐岩沉积于碳酸盐斜坡中的小规模浅滩,其主要矿物成分为白云石和方解石。根据全岩样品分析结果,鲕粒碳酸盐岩的δ18OV-PDB值在-11.3‰~-4.9‰之间,平均-6.5‰;δ13CV-PDB值在-1.7‰~0.3‰之间,平均-0.8‰。该碳酸盐岩沉积于浅水鲕粒滩,因受到淡水淋滤影响,之后又长期处于深埋环境,δ18O值明显偏低。由于成岩作用过程中受有机质影响很小,δ13C值没有表现出异常。白云岩的δ18O值较石灰岩的高。显微激光采样分析结果表明,鲕粒较胶结物有较低的δ18O和δ13C值。前者形成于动荡的浅水环境,形成后常受淡水的淋滤。胶结物大多形成于埋藏期,孔隙水具有海水性质,盐度较高,胶结物沉淀后,受淡水影响较小。由于经受了强烈的埋藏作用,鲕粒碳酸盐岩表现出的特征为Na和Sr含量低、Fe含量高—特高及Mn含量较高。白云石大多数为埋藏作用阶段高Mg含量卤水条件下交代而成,整体上有较低的有序度,MgCO3含量高。在强烈的埋藏作用和胶结作用下,鲕粒碳酸盐岩现存孔隙度极低。

     

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出版历程
  • 收稿日期:  2015-08-26
  • 修回日期:  2016-11-30
  • 刊出日期:  2017-01-28

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