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首页> 外文期刊>Journal of Asian earth sciences >Roles of fault structures on the distribution of mantle-derived CO_2 in the Bohai Bay basin, NE China
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Roles of fault structures on the distribution of mantle-derived CO_2 in the Bohai Bay basin, NE China

机译：故障结构对渤海湾盆地壁炉衍生CO_2分布的作用

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摘要

Based on studies on the contents, origin and filling history of CO2, and the seismic interpretation of the Bohai Sea, the sea area of the Bohai Bay basin, the distribution of mantle-derived CO2 and roles of fault structures have been examined in this study. Mantle-derived CO2 is mainly distributed in the structures within the Bozhong area, the center of the Bohai Sea. Laser Raman spectrum shows that CO2 inclusions are symbiotic with hydrocarbon inclusions with a charging time no earlier than 5.1 Ma. Late-stage (5.1-0 Ma) active basement faults are the major pathways for the migration of mantle-derived CO2. The intensity of the activity influences the CO2 content. Abundant CO2 occurs in the structures with basement faults that have relatively high fault activity rate (FAR) values. Along the basement fault, high CO2 content appears near the segments with high FAR values. Fault combination patterns affect the accumulation layers of mantle-derived CO2. Structures with fault combination patterns that resemble a "flower" or "Y" commonly accumulate CO2 in Cenozoic shallow layers as well. The branch faults that intersect with basement faults facilitate the adjustment of CO2 from deep to shallow layers. The uplifted mantle is the deep tectonic context, and the upwelling mantle magma is the source of the development of mantle-derived CO2. Below the middle crust, mantle-derived CO2 may be vertically transported along the lithosphere-scale strike-slip faults. Within the middle and upper crust, the late-stage active basement faults are the major conduits for mantle-derived CO2.
机译：基于研究二氧化碳的内容，起源和填补史的研究，以及渤海渤海的地震解释，渤海湾盆地的海域，在本研究中研究了披风衍生的二氧化碳的分布和故障结构的作用。搭桥衍生的二氧化碳主要分布在渤海市中心的博中地区的结构中。激光拉曼光谱表明，CO 2夹杂物是具有烃夹杂物的共生，其充电时间不早于5.1 mA。晚期（5.1-0 mA）有源地下室断层是拆除Mantle衍生的CO2的主要途径。活动的强度会影响CO2含量。丰富的二氧化碳发生在具有相对较高的故障活动率（远）值的地下室故障的结构中发生。沿着地下室故障，高CO2内容出现在具有高远远值的段附近。故障组合模式影响披露的CO2的累积层。具有故障组合模式的结构，其类似于“花”或“Y”通常在新生代浅层中累积CO2。与地下室故障相交的分支故障有助于将CO2从深到浅层的调节。隆起的地幔是深度的构造背景，升高的地幔岩浆是地幔衍生的二氧化碳的发展来源。在中间地壳下方，搭桥衍生的CO2可以沿着岩石圈级滑动断层垂直运输。在中地壳内，后期有源地下室故障是用于地幔衍生CO2的主要导管。

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  • 来源
    《Journal of Asian earth sciences》 |2020年第1期|104398.1-104398.16|共16页
  • 作者

    Miao Quanyun; Xu Changgui; Hao Fang; Yin Jie; Wang Qi; Xie Minjunshi; Cao Yijun; Zou Huayao;

  • 作者单位

    China Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China;

    China Natl Offshore Oil Co CNOOC Ltd Tianjin Branch Tianjin 300452 Peoples R China;

    China Univ Petr Sch Geosci Qingdao 266580 Peoples R China;

    Yangtze Univ Sch Geosci Wuhan 430100 Peoples R China;

    China Univ Petr Sch Geosci Qingdao 266580 Peoples R China;

    China Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mantle-derived CO2; Fault activity intensity; Fault combination pattern; Bohai Sea;

    机译：地幔衍生的二氧化碳;故障活动强度;故障组合模式;渤海;

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