日本海域地壳结构基本特征及其地质意义  

The basic characteristics and geologic meanings of crustal structure in the domain of Japan Sea

作　　者：李瑞磊[1] 赵雪平[1] 杨宝俊[1] 

机构地区：[1]吉林大学地球物理系,长春130026

出　　处：《地球物理学进展》2004年第1期56-60,共5页Progress in Geophysics

摘　　要：　利用日本海域内完成的多条地震测深剖面及其它地球物理资料,综合分析该域地壳结构特点以及Benioff带特点.日本海域地壳结构具有陆壳、洋壳区别和两分、三分两类;Benioff带在不同方向上具有不同倾角,延伸深度差别较大;日本海开裂的动力源自太平洋板块西向俯冲所产生的多期挤压和引张应力场.Utilizing the multiple profiles from seismic sounding and other geophysical data completed in the domain of Japan Sea, the paper synthetically analyzes the characteristics of crustal structure and Benioff zone in the domain. The crustal structure of the domain of Japan Sea takes on the differences between continental crust and oceanic crust and two types of dichotomy and trisection. The Benioff zones have different dip in different directions and their extended depths have greater differences. The drive of Japan Sea's opening comes from multiple compression and extension stress field produced by the westword subduction of the Pacific plate.

关 键 词：日本海域 地震测深剖面 地壳结构 Benioff带 日本海开裂 

分 类 号：P315[天文地球—地震学] P541[天文地球—固体地球物理学]