摘要
本文利用1959～1985年间完成的大地形变测量成果,分析研究了红河断裂带的近代形变特征。研究结果表明:红河断裂带的南、中、北各段的主压应变方向均与断裂走向近于正交,因而剪切错动十分微弱,其平均年应变率为:0.3～0.6 PPM。沿红河断裂带的形变突出部位在洱源、下关和定西岭。北东走向的鹤庆—洱源断裂及程海断裂显示为左旋压扭,而中甸—剑川断裂则显示为张性顺扭的特征。
The feature of recent crustal deformation on Red-River fault zone is inves tigated by studying at the geodetic surveying data completed during 1959 to 1985. Result shows that all the principal compressional strain axis in southern, medium and northern segments of the Red-River fault zone are in direction nearly prependicular to the fault strike, which means weak shear ship. The average anual strain is 0.3—0.6ppm. The most deformed parts on the fault zone are Eryuan Xiaguan and Dinxiling. The northest runing Heqing-Eryuan fault and Chenhai fault appear to be compressional left-lateral, while the Zhongdian-Jianchuan fault presents opening right-lateral feature.
出处
《地壳形变与地震》
CSCD
1989年第1期1-12,共12页
Crustal Deformation and Earthquake
