栾川断裂带的构造变形与模拟

Transmutation and simulation of Luanchuan fault zone in Qinling mountains

文章通过变形分析发现,岩石有限应变测量的3轴比X∶Y∶Z=8.86∶4.32∶1,Flinn指数总体小于1,应变椭球体为扁椭球状;根据已知的倾角β等数据,进行此段区域的理论模拟,其汇聚方向与板块边界夹角α大约为50°-60°,Flinn指数小于1,与实际变形基本相符,显示出华北板块与扬子板块的构造演化具有典型的斜向汇聚特征。

Transmutation analysis is made, and the results are as follows, the triaxial ratio of the rock finite strain is X ： Y ： Z=8.86 ： 4. 32 ： 1,most of the Flinn exponential is smaller than one, and the strain ellipsoid is flat-ellipsoidal. With the data of obliquityβ and other related data, theoretic simulation is conducted. The angle a between the convergence direction and the plate limit is approximately 50°-60°,and the Flinn exponential is also smaller than one, which are in accordance with the actual situations. The results show that there exist oblique convergence between the North China plate and the Yangtzi plate.