大地测量与地球动力学2017，Vol.37Issue(3)：251-255,5.DOI:10.14075/j.jgg.2017.03.007
深地震测深揭示的济阳坳陷地壳结构特征
Crustal Structure Features of Jiyang Depression as Revealed by DSS Profiles
摘要
Abstract
Through processing and contrast analysis of 3 deep seismic sounding lines crossing Jiyang depres sion,we find that the crustal structure of Jiyang depression can be divided into three layers:upper,mid and lower crust.The Moho depth of Jiyang depression is about 31 km,and the interface variation is gentle.The deep tectonic is mirror symmetrical to the shallow tectonic.Low velocity bodies exist in the mid-crust of Jiyang depression,providing necessary conditions for the detachment development,and causing variations of crustallateral thickness between the upper crust and lower crust.The Moho interface feature differs between the Huimin sag and Dongying sag.In Huimin sag there is a P4 seismic phase before the Pm phase,which is the reflection of the crust-mantle transition zone.However,in Dongying sag the Pm seismic phase reflects the features of first order discontinuous interface.The result shows that the crustal structure of Jiyang depression has typical features of north China and that asthenospheric upwelling changes the Moho interface property of Jiyang depression.关键词
济阳坳陷/深地震测深/地壳结构/地壳厚度横向变化/莫霍面差异Key words
Jiyang depression/deep seismic sounding/crustal structure/crustal thickness later variation/Moho interface difference分类
天文与地球科学引用本文复制引用
宋向辉,王帅军,马策军,孙一男,杨宇东,臧怡然..深地震测深揭示的济阳坳陷地壳结构特征[J].大地测量与地球动力学,2017,37(3):251-255,5.基金项目
中国地震局地球物理勘探中心青年基金(YFGEC2016004).Young Foundation of Geophysical Exploration Center,CEA,No.YFGEC2016004. （YFGEC2016004）
