西北地震学报2012，Vol.34Issue(4)：375-382,8.DOI:10.3969/j.issn.1000-0844.2012.04.0375
天津—北京高分辨地震折射剖面初至波走时成像
Tomography of High Resolution Seismic Refraction Traveltimes in Tianjin-Beijing Profile
摘要
Abstract
The traveltimes tomography of first arrive waves along Tianjin- Beijing profile with high resolution is done using regularization inversion method. The impacts on the inversion results from very different starting models and inversion parameters are analyzed, the resolution of the final model is assessed by the checkboard method, and the upper crust fine structure with blind faults in the study area is obtained finally. The results show that the resolution of the final model is up to 5 km ×1 km with some are more fine. The study region is alternate by depressed areas with upheaval areas, and small sags are within big ones. The depths of crystalline basement change in the range of 2～8 km and its fluctuant pattern complies with the geological tectonic characteristics. The fault activity and crustal moment since Tertiary have greater impact on the velocity structure of this region.关键词
上地壳速度结构/初至波成像/正则化反演/天津—北京剖面/高分辨地震折射剖面Key words
Upper crust velocity structure/ First arrival wave tomography/ Regularized inversion/ Tianjin-Beijing profile/ High resolution seismic refraction profile分类
天文与地球科学引用本文复制引用
贾宇鹏,王夫运,田晓峰,段永红,莘海亮,刘宝峰..天津—北京高分辨地震折射剖面初至波走时成像[J].西北地震学报,2012,34(4):375-382,8.基金项目
国家自然科学基金重点项目(90814012) （90814012）
地震科学联合基金(C08057) （C08057）
中国地震局兰州地震研究所论著编号:LC2012026 （）
