安达曼海盆地德林达依陆架丹老断裂走滑特征与演化  

Characterization and evolution of the Mergui Faults in the Tanintharyi Shelf,Andaman Sea Basin

作　　者：金龙 栾锡武 肖菲 姜露珊 殷鉴 王子杰 王婕园 杨晓 马浩喆 JIN Long;LUAN Xiwu;XIAO Fei;JIANG Lushan;YIN Jian;WANG Zijie;WANG Jieyuan;YANG Xiao;MA Haozhe(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Institute of Marine Geology,China Geological Survey,Qingdao 266237,China)

机构地区：[1]山东科技大学地球科学与工程学院,青岛266590 [2]中国地质调查局青岛海洋地质研究所,青岛266237

出　　处：《海洋地质前沿》2024年第12期18-30,共13页Marine Geology Frontiers

基　　金：国家自然科学基金(92055211,42249801);中国-东盟海上合作基金项目(2120100500017001)。

摘　　要：安达曼海盆地是由拉分作用形成的弧后扩张盆地。盆地东部的构造特征与演化对研究安达曼海盆地的演化和板块斜向俯冲作用形成的走滑断裂具有重要意义。本文以二维和三维地震数据为基础,结合钻井数据,对安达曼海盆地东部地层结构和构造特征进行分析,建立了安达曼海盆地东部地区的层序地层结构。通过地层解释和属性分析,识别了2个主要的断裂带,命名为东丹老断裂和西丹老断裂。根据构造分析,建立了断裂带的演化模式。研究结果表明,安达曼海盆地东部断裂带演化划分为3个阶段:早中新世走滑-强拉伸阶段、中—晚中新世扭张-走滑阶段和上新世至今的右旋走滑阶段。Andaman Sea Basin is a back-arc spreading basin formed by pull-apart action,whose tectonic features and evolutionary mechanism in the eastern part of the basin are essential for understanding the evolution of the Andaman Sea Basin.The structural characteristics and evolution of the eastern part of the basin are of great significance for studying the evolution of the Andaman Sea Basin and the strike-slip faults formed by the oblique subduction of the plate.The stratigraphic structure and tectonic features in the eastern Andaman Sea Basin were analyzed based on 2D and 3D seismic data,and drilling and seismic profile data.The seismic stratigraphic sequences in the eastern Andaman Sea were established.Faults were finely sculpted using automatic 3D seismic layer pickup and seismic attributes.Two major fault zones were identified and named the East Mergui Fault and the West Mergui Fault.The evolution model of the fault zone was established based on the structural analysis.The evolution of the eastern Andaman fault zone could be divided into three phases:the strike-slip and strong extension stage in the Early Miocene,the extensional strike-slip stage in the Middle to Late Miocene,and the right-lateral strike-slip stage from the Pliocene to the present.

关 键 词：安达曼海盆地 德林达依陆架 丹老断裂 走滑断层 地震解释 构造演化 

分 类 号：P736[天文地球—海洋地质]