地理科学 ›› 1983, Vol. 3 ›› Issue (1): 56-62.doi: 10.13249/j.cnki.sgs.1983.01.56

• 论文 • 上一篇    下一篇

卫片中线性构造的地质意义及其与地震的关系

刘燕君   

  1. 北京大学遥感中心培训部
  • 出版日期:1983-01-20 发布日期:1983-01-20

GEOLOGICAL IMPLICATION OF LINEAMENTS ON THE LANDSAT IMAGERY AND ITS RELATION TO EARTHQUAKES

Liu Yanjun   

  1. Beijing University
  • Online:1983-01-20 Published:1983-01-20

摘要: 不同的地质体吸收、反射、发射和透射电磁波的波长与频率是不同的,这是由各种地质体物质成分、结构和分布格局上的差异造成的。因此可以说,地质体电磁波辐射的特点,是反映地质体总特征的灵敏指示剂。卫星象片是地表景观电磁波辐射总特征的综合反映,而地表的景观现象多受地质构造的控制,同时,我们还可以对不同季节、不同波段的象片进行处理和分析对比,以排除非地质信息的干扰,使地质体或地质构造信息以较明显的色调异常或图形异常出现在卫片上,以便有效地解决不同地质体的界线和地质构造特征等一系列问题。

Abstract: When the tone or feature on the Landsat Imagery appears abnormally andextends along a straight line,it is called lineament.The lineament largely represents the traces of deformation of earth crust.Interpretation of the lineament on the Landsat Imagery shows the followingfeatures:1.We can understand more thoroughly about the known rifts;2.A lot of rifts that may be neglected as detected with common methodscan be replenished;3.In the area covered by quartermary sediments,we can discover thedeep-situated rifts by using the method of perspective message;4.We can find the rock undergoing plastic deformation stage or the stressconcentration belt in stress concentrating stage;5.The belt with-lineaments more concentrated or the interface betweendifferent geological bodies in large area indicates the existence of great rift beltswhich pass through the earth crust.The most of strong earthquakes often occur in the great rift belts.Theirconcrete locations are generally at the points where the active structure or thestress concentration belt intersects the old rifts.In regard to the occurence ofstrong earthquakes,the stress concentration belt with its stresses concentrating ismore dangerous than the active structure.