辽南庄河地区夹河山韧性剪切带构造特征及其大陆动力学背景

Tectonic features and continental dynamic background of the Jiaheshan ductile shear zone in the Zhuanghe area, southern Liaoning

摘要: 辽南庄河地区的夹河山韧性剪切带发育于晚三叠世—早侏罗世花岗岩岩体中,通过对其几何学、运动学、动力学及质量平衡分析等方面的研究后认为,该剪切带为自NWW向SEE运动的近水平伸展型正剪切带,形成于早燕山期,与Izanagi板块向中国东部挤压过程中因应力松弛导致的后造山伸展作用有关。

Abstract: The Jiaheshan ductile shear zone in the Zhuanghe area,south ern Liaoning,occurs in a Late Triassic-Early Jurassic granite body.Geometric,kinematic,and dynamic studies and mass-balance analysis suggest that the shear zone is a normal ductile shear zone of subhorizontally exten sional type that moves from WNW to ESE.It formed in the early Yanshanian by post-orogenic exten sion due to stress relaxing caused by the compression of the Izanagi plate toward eastern China.