Enlightenment of the Mariana Fore-arc Sedimentary Basin Evolution to the Subduction Process  

作　　者：XING Lei LI Qianqian MENG Qingwei LIU Huaishan WEI Jia LU Boran ZHOU Heng 

机构地区：[1]Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Qingdao,Shandong 266100,China [2]Evaluation and Detection Technology Laboratory of Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao,Shandong 266237,China [3]Chinese Academy of Geological Sciences,Beijing 100037,China [4]Qingdao Institute of Marine Geology,China Geological Survey,Ministry of Natural Resources,Qingdao,Shandong 266071,China [5]BGP International,CNPC,Zhuozhou,Hebei 072750,China

出　　处：《Acta Geologica Sinica(English Edition)》2022年第1期71-80,共10页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.91858215 and 91958206);the National Key Research and Development Program of China(Grant No.2018YFC1405901);the Key Research and Development Program of Shandong Province(Grant No.2019GHY112019)。

摘　　要：The Mariana subduction structure is a hot topic in ocean-ocean subduction zone research,and its subduction mechanism has attracted wide attention from experts and scholars in China and abroad.Based on the multi-channel seismic data of survey line MGL1204 in the Mariana fore-arc and DSDP ocean drilling data,this paper studies the development and evolution characteristics of the structure and strata in the Cenozoic Mariana fore-arc sedimentary basin.The Cenozoic strata are divided into six seismic sequences,with the possible era of each seismic sequence discerned,and the relationship between fault development and earthquakes analyzed.The episodic activity of the volcanic chain of the Mariana island arc is thought to control the tectonic and stratigraphic development pattern of the Cenozoic sedimentary basin in the fore-arc.Between 16°N-19°N and 146°E-151°E,the maximum thickness of the sedimentary center of the Cenozoic fore-arc sedimentary basin in Mariana is about 2360 m.Normal faults are developed in the area and some broke to the seabed,indicating that the Mariana island arc is still in the post-arc expansion stage.The application of multi-channel seismic sections in structural and stratigraphic evolution study is an important means to elucidating the Mariana subduction mechanism.

关 键 词：subduction system fore-arc basin sedimentary evolution subduction mechanism MARIANA 

分 类 号：P736[天文地球—海洋地质]