摘要
本文对南北地震带北段南端近十五年来大面积垂直形变观测资料及跨断层短水准观测资料进行了系统的分析处理。认为本地区七十年代以来以继承性构造运动为主。八十年代以来有加强的趋势;孕震区附近存在高梯度形变带,且高梯度带在断裂带附近发生偏转;形变速率等值线在其偏转处的切线几乎与断裂线正交。随着观测点的震中距及观测点与发震构造的位置关系不同,断层形变表现出不同的特征。另外,还对地壳形变与莫霍面深度及地壳应力场之间的关系作了初步分析。
In this paper, the observation data of vertical deformation in large area and the short levelling across fault in recent 15 years on south-north seismic belt are processed. It is considered that the inherited tectonic movement is dominant in this area since 1970's, and strentherning after 1980. There is a high gradient deformation zone in the earthquake area which deflectes nearby the fault zone. The isoplethes of vertical deformation rate or their tangents are almost perpendicular to fault line. The fault deformation shows different characteristics with different distance among observation sites and earthquake center or tectonic belt. The relation among the deformation and the isobathes of Mohe surface and the stress field in this region is analysed yet.
出处
《地壳形变与地震》
CSCD
1992年第4期30-36,共7页
Crustal Deformation and Earthquake
关键词
地震
地壳
运动
south-north seismic belt, gradient zone, numerical characteristic, deformation anomaly.
