Reassessment of the Distribution of Mantle CO_(2) in the Bohai Sea,China:The Perspective from the Source and Pathway System  

作　　者：TANG Huafeng GUO Tianchan WU Keqiang LIU Zilin XU Jianyong LU Baoliang WANG Pujun 

机构地区：[1]Key Laboratory for Evolution of Past Life and Environment in Northeast Asia,Jilin University,Changchun 130061,China [2]Key Laboratory of Mineral Resources Evaluation in Northeast Asia,Ministry of Natural Resources,Changchun 130061,China [3]College of Earth Sciences,Jilin University,Changchun 130061,China [4]CNOOC Research Institute,Beijing 100028,China [5]Institute of Gravity and Magnetic Technology,Chang’an University,Xi’an 710054,China

出　　处：《Acta Geologica Sinica(English Edition)》2022年第1期337-347,共11页地质学报（英文版）

基　　金：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);the National Science and Technology Major Project of the Ministry of Science and Technology of China(2016ZX05026-004-001)。

摘　　要：Research on the distribution of mantle CO_(2)should involve comprehensive analysis from CO_(2)source to accumulation.The crust-mantle pathway system is the key controlling factor of the distribution of mantle CO_(2),but has received little attention.The pathway system and controlling factors of CO_(2)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 CO_(2)is reassessed using age data for CO_(2)accumulations.The distribution of mantle CO_(2)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 CO_(2).The area with uplift of the Moho exhibits accumulation of mantle CO_(2)at depth.CO_(2)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 CO_(2)concentrations.The distribution of mantle CO_(2)and volcanic rocks are not the same,but both probably followed the same pathways sometimes.Mantle CO_(2)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).

关 键 词：mantle CO_(2) source area pathway system fault MOHO Bohai Sea 

分 类 号：P618.13[天文地球—矿床学]