摘要
板块碰撞构造运动学是８０年代以来国际上兴起，至今仍方兴未艾的研究领域。本文运用构造运动学的基本原理，结合近年来在江南和东天山造山带的工作实践，对板块碰撞的地质标志、运动学研究的多项重要内容、韧剪带的成因类型等作了总结．最后对江南和东天山造山带的碰撞运动学特征和新认识作了简要介绍。
The collisional tectonic kinematics is one of the important studying methods of plate tectonics and is used to ascertain the senses of movement,the polyphase deformation and the tectonic evolution.The present authors have been working for more than 10 years in the Jiangnan Protefozoic orogenic belt and the Eastern Tianshan Paleozoic orogenic belt and have obtained a plenty of information of ductile shear deformation and firsthand kinematic evidence.The authors presented and summaried the following research results of collision tectonic kinematies.1.There are 6 geological indicators of the plate collision-suture zone,i.e., ① the tectonic melange, ② the high pressure metamorphic zone and regional metamorphic zone, ③ the collision type granite, ④ the large-scale ductile shear zone, ⑤ the polyphase deformation zone and ⑥geophysically abnormal zone.2.The 4 major aspects for the research on lower and middle-deep seated tectonic kinematics are: ① the mylonitic rocks including feldspar-quartz mylonites, mylonitized rocks and phyllonites,② special foldins style such as sheath fold and recumbent fold, ③ stretching lineation,foliation and cleavage,④ kinematic ductile shearing sense indicators including strain indicators,rotation indicators , shear indicators, etc..3. The 5 types of ductile shear zone are divided based on origin mechanism: ① subduction type, ②thrust type, ③ fault zone type, ④ strange slip type and ⑤ extension type.Finally, the authors reported in brief some new results and understanding about the collision kinematics in the Jiangnan orogenic belt and the Eastern Tianshan orogenic belt, for example,regional sense of shear and polyphase deformation(thrust,strike-slip and extension) corresponding to the evolution history of regtonal tectonics.
出处
《高校地质学报》
CAS
CSCD
1995年第1期11-21,共11页
Geological Journal of China Universities
关键词
板块碰撞构造
运动学
江南
造山带
东天山
plate collision tectonic kinematics, ductile shear zone,Jiangnan orogenic belt,Eastern Tianshan orogenic belt.
