华县一兰田断裂带变形石英的TEM研究

TEM Studying of the Deformed Quartz in Huaxian-Lantian Fault

华县一兰田断裂为第四纪前基岩断裂。野外工作和TEM研究表明:该断裂从燕山运动期直至喜山运动晚期仍有活动。最后一次活动或较强期的构造变形条件为低温和高的应变速率,很可能与地震事件有关。该断裂带目前仍处在加工硬化阶段,综合机械性能较差,应引起有关学科的重视。

Huaxian-Lantian fault is a prequaternary bedrock fault. The TEM and field studying have shown that the fault had still been activing from Yenshan motion period to late Himalayan mo-tion Period. Its last deformation was under the microthermal and faSt stress-strain velocity, which is Possibly relative to the earthquake events. Recently the fault is staying in the work hardenmg so its mechanical Properties are not very well, which should be noticed by relative subjects.