摘要
一、引言 地壳上的断裂系统及全球性剪切网络问题曾有过不少的讨论。自W.H.Hobbs在1911年提出了地表的线性构造以后,R.A.Sonder等人又不断对此问题作了更广泛的讨论。Al.Veronnet(1912),F.A.Vening Meinesz(1947),М.В.Стовас(1963),А.В.Долицкий(1963)等对全球性的剪切网络问题进行过研究。
The fracturing of the crust,being in action recently in China and in more extensive regions,appears to be characterized by some kind of a regular network.This feature may be confirmed by historic and recent seismieity,geologic and geomorphologic evidences,as well as the diagnostic distribution of linear structures identified from the satellite images.The seismic events of continental China correspond only partly to old tectonic structures.In general they are distributed along some definite directions,mainly NE and NW,occasionally NS and EW as well,forming a zonal and conjugated pattern.As a result,there appears on a large scale a regular network of the recent crustal fracturing.The events which took place intermittently along these fracture zones were in general correlated each other in accordance with a definite regularity both in space and time.In most cases the stronger earthquakes occurred right in the intersections of these crust-fracturing zones.The very feature that the recent crust-fracturing appears in a network pattern,can be used to account for the correlation between individual earthquakes on a large scale.The study of the crust-fracturing pattern is therefore a highly significant topic for deciphering the stress field of recent structure and in earthquake prediction.
作者
丁国瑜
李永善
Ding Guoyu;Li Yongshan
出处
《地质学报》
1979年第1期22-34,共13页
Acta Geologica Sinica
