摘要
地震转换波测深法首次在我国东南沿海的福州地区进行地壳深部构造的探测,得出了该区地壳中的4个主要界面的构造形态图和沿北东方向穿越本区的地壳深部构造剖面图。查明闽江断裂由两条北西向产状较陡的超壳断裂组成,福州断陷盆地的深部上地壳G界面呈条带状下沉,下地壳C、C_1界面和M面及壳内低速层均相对上隆,这一结果为解释本区高地热异常提供了深部依据。
The method of deep sounding by converted waves of earthquakes was used for the first time in investigation of deep crust structures in Fuzhou area of coast Southeast China. A cross-section of deep crust structure with NE direction and four contour maps of major crust boundaries for the area have been obtained. It is revealed that the Minjiang fault consists of two steep deep-seated faults with NW strike, and that the deep structure of Fuzhou basin is characterized by the belt-shaped subsidence of the boundary G in upper crust and the relative uplift ing of the boundary C, Ci, M and low velocity layer in the middle and lower crust. The results obtained have been served as a basis for the interpratation of the anomaly of high heat flow in Fuzhou region.
出处
《地震地质》
EI
CSCD
北大核心
1993年第2期174-180,共7页
Seismology and Geology
关键词
福建
地震
转换波
地壳
深部构造
Fujian, Deep sounding by converted waves of earthquakes, Deep crust structure
