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鄂尔多斯盆地苏里格地区奥陶系马家沟组白云石化

付金华 王宝清 孙六一 包洪平 徐波

付金华, 王宝清, 孙六一, 包洪平, 徐波. 鄂尔多斯盆地苏里格地区奥陶系马家沟组白云石化[J]. 石油实验地质, 2011, 33(3): 266-273. doi: 10.11781/sysydz201103266
引用本文: 付金华, 王宝清, 孙六一, 包洪平, 徐波. 鄂尔多斯盆地苏里格地区奥陶系马家沟组白云石化[J]. 石油实验地质, 2011, 33(3): 266-273. doi: 10.11781/sysydz201103266
Fu Jinhua, Wang Baoqing, Sun Liuyi, Bao Hongping, Xu Bo. Dolomitization of Ordovician Majiagou Formation in Sulige region, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2011, 33(3): 266-273. doi: 10.11781/sysydz201103266
Citation: Fu Jinhua, Wang Baoqing, Sun Liuyi, Bao Hongping, Xu Bo. Dolomitization of Ordovician Majiagou Formation in Sulige region, Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2011, 33(3): 266-273. doi: 10.11781/sysydz201103266

鄂尔多斯盆地苏里格地区奥陶系马家沟组白云石化

doi: 10.11781/sysydz201103266
基金项目: 国家科技重大专项(2008ZX05004-003)资助
详细信息
    作者简介:

    付金华(1963- ),男,博士,教授级高级工程师,从事盆地油气地质研究.E-mail:fjh_cq@petrochina.com.cn.

  • 中图分类号: TE122.2

Dolomitization of Ordovician Majiagou Formation in Sulige region, Ordos Basin

  • 摘要: 苏里格地区马家沟组为一套碳酸盐岩为主,夹蒸发岩的地层,沉积于超盐度的局限陆表海环境。白云石分为以泥晶结构为主的,以细—中晶结构为主和充填于孔、缝中3类。白云石Na含量(0~2099)×10-6,Sr含量(0~70)×10-6,Mn含量(0~112)×10-6,Fe含量(39~86746)×10-6,以变化较大的Na含量、低的Sr和Mn含量、高的Fe含量为特征。白云石δ18O值在-16.00‰~-5.73‰之间,δ13C值在-11.46‰~1.90‰之间,说明碳酸盐岩经历了淋滤作用和埋藏作用。大多数孔、缝充填白云石较围岩组分有较低的δ18O和δ13C值,说明孔缝充填的白云石形成较晚。白云石以低的有序度,非理想配比的CaCO3和MgCO3含量为特征。白云石的87Sr/86Sr值为0.707977±0.000070至0.711791±0.000064,绝大部分高于全球中、上奥陶统分界线对应的87Sr/86Sr值。微生物白云石化是形成白云石的机理。

     

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出版历程
  • 收稿日期:  2010-05-28
  • 修回日期:  2011-04-10
  • 刊出日期:  2011-06-28

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