Home > Archive>Volume 96, Issue 1, 2022 >337-347. DOI:10.1111/1755-6724.14770
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Reassessment of the Distribution of Mantle CO2 in the Bohai Sea, China: The Perspective from the Source and Pathway System
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Thanks to Professor Liu Li, Professor Ye Jiaren and Professor Tuo Jincai for their help in the paper. We also thank Lucy Muir, Ph.D. for editing the English text of a draft of this manuscript. This study was supported by the Major Program of the National Natural Science Foundation of China (41790453), the Natural Science Foundation of Jilin Province (20170101001JC), the National Natural Science Foundation of China (41472304), and the National Science and Technology Major Project of the Ministry of Science and Technology of China (2016ZX05026-004-001). We would like to thank all the people who provided us with invaluable help.

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    Abstract:

    Research on the distribution of mantle CO2 should involve comprehensive analysis from CO2 source to accumulation. The crust-mantle pathway system is the key controlling factor of the distribution of mantle CO2, but has received little attention. The pathway system and controlling factors of CO2 distribution in the Bohai Sea are analyzed using data on fault styles and information on the mantle and lithosphere. The relation between volcanic rocks and the distribution of mantle CO2 is reassessed using age data for CO2 accumulations. The distribution of mantle CO2 is controlled by uplift of the asthenosphere and upper mantle, magma conduits in the mantle and fault systems in the crust. Uplifted regions of the asthenosphere are accumulation areas for CO2. The area with uplift of the Moho exhibits accumulation of mantle CO2 at depth. CO2 was mainly derived from vertical migration through the upper mantle and lower crust. The fault style in the upper crust controls the distance of horizontal migration and the locations of CO2 concentrations. The distribution of mantle CO2 and volcanic rocks are not the same, but both probably followed the same pathways sometimes. Mantle CO2 in the Bohai Sea is concentrated in the Bozhong sag and the surrounding area, particularly in a trap that formed before 5.1 Ma and is connected to crustal faults (the Bozhang faults) and lithospheric faults (the Tanlu faults).

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TANG Huafeng, GUO Tianchan, WU Keqiang, LIU Zilin, XU Jianyong, LU Baoliang, WANG Pujun.2022. Reassessment of the Distribution of Mantle CO2 in the Bohai Sea, China: The Perspective from the Source and Pathway System[J]. Acta Geologica Sinica(),96(1):337-347

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History
  • Received:February 25,2020
  • Revised:May 14,2021
  • Online: February 24,2022
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