宣汉双石庙地区纵弯褶皱叠加特征及应力场、应变场分析

SUPERPOSITION CHARACTERISTICS, STRESS AND STRAIN FIELDS OF LONGITUDINAL FOLDS IN SHUANGSHTMTAO REGION, XUANHAN

本文对川东北双石庙地区横跨褶皱特征作了详细论述,对其早晚两期褶皱形成时应变力场特征进行了较深入的讨论,并对岩石有限应变进行了Fry法研究、分析,指出了单个褶曲为平面应变,且核部应变程度大于翼部,复合地区应变程度大于非复合地区等特点。

The present paper has detailed the characteristics of cross folds in Shuangshimiao region, northeast Sichuan, and has discussed in detail the stress field where the early-and late-stage folds were formed. Using the Fry-method for studying the finite strain of rock, this paper has pointed out that individual folds result from the plane strain, with the strain intensity in the core being more than that in the limbs, and the strain intensity in the cross district more than that in the other districts.