祁连山扭动构造体系发展史

THE DEVELOPMENT HISTORY OF THESHEAR STRUCTURE SYSTEM OFTHE QILTAN MOUNTAIN

研究构造体系发展史是使地质力学不断完善必须解决的重要内容之一。崔盛芹教授和杨振升副教授曾对燕辽及其邻区的古构造体系作过研究,这是对构造体系演化研究的一次非常有意义的尝试。魏春海总工程师等也曾对祁连山的古构造体系进行过筛分,这又是一项令人感兴趣的探索。笔者吸取上述成果的经验,继续从形成与形变辩证统一关系研究入手,而采用地质与地球物理各项资料综合分析、模验实验和数学地质来追溯祁连山扭动构造体系的兴衰过程,为认识应力场的演化,进而认识地壳运动规律创造条件。但是,由于这个课题涉及的地域广,要求应用地质学各项基础知识面宽,完成任务的时间短(16个月)。

This paper discuses the development history of the shear structure system-sof the Qilian Mountain by applying the theory of geomechanics, in combina-ation with the sythetic study of the geological and geophisical data, the modal experiments and the geomathematical method Several conclusions drawn from the study are as follows.1. the development of the structural system is from simple to complex;2. the order of formation of the structural system is not regular;3. the limits of the structural system is changable.