摘要
测定小型剪切带变形构造,是研究地壳大型剪切带运动学机制的基础,也是恢复造山带应变平衡剖面的工作手段之一。本文以小型脆-韧性切剪带及S-C韧性剪切面理构造为例,介绍如下方法:①利用野外所测剪切带各种产状要素,通过赤平极射投影计算出剪切指向和应力状态;②按照简单二维有限应变的原理,求出剪切带的应变参数及沿剪切指向所发生的位移量。
Measurements of small-scale shear deformation structures are basic way for studying kinematics mechanism of
large-scale shear zone and also one method on rebuildment of orogenic belt balance section.Through studying small-scale
brittle-ductile shear zone and ductile S-C cleavage foliations,the authors introduce following methods:the first,use the attitude
elements of shear zone to calculate the shear direction and stress state by means of stereonet.the second,according to simple
two—dimensional finite strain principle,calculate the strain parameters and the displacement in the shear zone.
出处
《地质与勘探》
CAS
CSCD
北大核心
1993年第12期34-38,共5页
Geology and Exploration
基金
国家自然基金(课题编号049102032)及国家三○五"八.五"重大科技攻关项目85-902-01-05资助
