朝鲜半岛南部三维地壳速度结构成像  

3-D crustal velocity tomography in the southern Korean Peninsula

作　　者：李清河[1] 张元生[2] So Gu KIM 

机构地区：[1]江苏省地震局,南京210014 [2]中国地震局兰州地震研究所,兰州730000 [3]Seismo logicalInstitute,Hanyang University,South Korea

出　　处：《地球物理学报》2007年第4期1073-1081,共9页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40374033)资助.

摘　　要：对多震相走时层析成像方法进行改进和优化,使用朝鲜半岛陆地和近海的地震记录,对朝鲜半岛南部(34.5°N～39°N,125°E～130°E)进行地震波走时反演,获得了本研究区的三维速度结构成像结果.分析了沉积层、基底、上地壳、康腊面、下地壳和莫霍面的特征.研究了不同地质区的深部结构的主要差别、主要断裂特征、海陆交界的地壳特征等.可以发现京畿山地与沃川褶皱带、太白山褶皱带、临津江褶皱带深部结构的差异尤为明显.The method ＂MUltiphase Traveltime Inversion （MUTI）＂ has been improved and optimized. We conducted 3-D velocity tomography of the southern Korean Peninsula within 34.5°N- 39°N, 125°E- 130°E by using seismic data on land and near ocean. The velocity structure features of sediment, basement, upper crust, lower crust, Conrad and Moho interfaces were analyzed. We found obvious velocity differences among different geological provinces, especially the Kyonggi Massif and Okchon Fold Zone, Kyonggi Massif and Taebaesan Fold Zone, Kyonggi Massif and Imjingang Fold Zone. The velocity difference between sea and land is obvious.

关 键 词：朝鲜半岛南部 三维速度结构成像 深部结构特征 

分 类 号：P315[天文地球—地震学]