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首页> 外文期刊>Interpretation >Factors controlling organic matter enrichment in the Lower Cambrian Niutitang Formation Shale on the eastern shelf margin of the Yangtze Block, China
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Factors controlling organic matter enrichment in the Lower Cambrian Niutitang Formation Shale on the eastern shelf margin of the Yangtze Block, China

机译:控制下寒武纪尼古氏岗成交位上的有机物质浓缩的因素在中国扬子街区东部货架边缘

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摘要

The degree of organic matter (OM) enrichment in shale determines its oil and gas potential. To understand the factors controlling this OM enrichment, we have used petrological and geochemical analyses to study the Lower Cambrian Niutitang Formation Shale in the eastern shelf margin of the Yangtze Block. Our results reveal that the total organic carbon (TOC) content of the Niutitang Formation Shale varies significantly throughout the vertical section. The lower part of the Niutitang Formation has a high TOC content, likely due to its formation in a dysoxic/anoxic environment with intense upwelling that favored OM enrichment. The middle part of the Niutitang Formation has the highest TOC content, which can be attributed to its formation in an environment with more hydrothermal activity, moderately upwelling, high paleosalinity, dysoxic/anoxic conditions, and moderately restricted water contents. Finally, the upper part of the Niutitang Formation records the lowest TOC contents because it likely formed in an oxic to dysoxic environment with weakly restricted hydrographic conditions that did not favor the preservation of OM. Therefore, these data demonstrate that the factors controlling OM enrichment in the Niutitang Formation Shale on the shelf margin include intense upwelling, greater amounts of hydrothermal activity, high paleosalinity, dysoxic/anoxic conditions, and moderately restricted water contents.
机译:None

著录项

  • 来源
    《Interpretation》 |2017年第3期|共12页
  • 作者单位

    China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting Beijing China and China University of Petroleum Unconventional Natural Gas Research Institute Beijing China;

    China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting Beijing China and China University of Petroleum Unconventional Natural Gas Research Institute Beijing China;

    China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting Beijing China and China University of Petroleum Unconventional Natural Gas Research Institute Beijing China;

    Chongqing Institute of Geology and Mineral Resources Chongqing China;

    Chongqing Institute of Geology and Mineral Resources Chongqing China;

    China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting Beijing China;

    China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting Beijing China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    contents; preservation; conditions;

    机译:内容;保存;条件;

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