中国东部无机CO_2气藏与(古)太平洋板块俯冲关联  

Correlation of inorganic CO_2 reservoirs in East China to subduction of (Paleo-) Pacific Plate

作　　者：赵斐宇 姜素华[1,2] 李三忠[1,2] 曹伟[1,2] 汪刚[1,2] 张慧璇 高嵩[1,2] 

机构地区：[1]海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《地学前缘》2017年第4期370-384,共15页Earth Science Frontiers

基　　金：国家自然科学基金杰出青年基金项目(41325009);山东省泰山学者特聘教授项目

摘　　要：中国东部受(古)太平洋板块俯冲的影响,无机CO_2气藏发育广泛,分布层位复杂。本文通过对中国东部松辽、渤海湾、苏北、三水、东海、珠江口、莺歌海等盆地无机CO_2气藏的成因及运聚规律分析,结合深部碳循环以及(古)太平洋板块俯冲过程,探讨了中生代以来(古)太平洋板块俯冲对中国东部无机CO_2气藏的影响。这些无机CO_2气藏在空间分布上与中生代以来(古)太平洋板块俯冲造成的中国东部高地热流区、深大断裂分布及火山岩带展布一致。(古)太平洋板块俯冲改变了中国东部的深部构造状态,导致大规模岩浆喷发、地热升高,并控制了深大断裂系统,有利于无机CO_2运移储集;俯冲作用引起的软流圈上涌、地幔脱气作用以及印度-欧亚板块碰撞的远程效应使中国东部形成大量高CO_2含量的源区,为幔源CO_2的形成提供了条件。Influenced by the subduction of the（Paleo-）Pacific Plate,the CO2 reservoirs widely developed in East China with complex forms of distribution.On the basis of the analysis of the origin,migration and accumulation of the inorganic CO2 reservoirs in the Songliao,Bohai Bay,Subei,Sanshui,East China Sea Continental Shelf,Pearl River Mouth and Yingehai basins in East China,and combining the subduction processes of the（Paleo-）Pacific Plate,we have discussed how the subducting process influenced the CO2 reservoirs in East China since the Mesozoic.The spatial distribution of these inorganic CO2 reservoirs is consistent with that of the high heat flows,the deep-seated faults and the volcanic zones related to the subduction process of（Paleo-）Pacific Plate.The subduction process has changed the deep tectonic attribute under East China,resulting in a large scale of magmatism and geothermal rise,and it has also controlled the deep fault system in East China,which promoted the migration and accumulation of these inorganic CO2.The mantle-sourced CO2 is generated by the asthenosphere upwelling and mantle degassing of the（Paleo-）Pacific Plate subdution process,and by the far-field effect of the collision between the India and the Eurasia plates.

关 键 词：中国东部 CO2 古太平洋板块 俯冲 深部碳循环 

分 类 号：P542[天文地球—构造地质学]