造山后伸展构造研究的最新进展

本文综合介绍和比较分析了全球范围内不同时期造山带中的伸展构造样式；地壳尺度的拆离带或低角度正断层的性质、几何学和运动学；拆离带下盘变质核杂岩的抬升机理及其中各种韧性组构的成因和发展演变；后造山伸展塌陷过程中的岩浆活动和热演化；伸展平行褶皱的成因和构造几何学；后造山伸展盆地的形成过程；造山带地球物理剖面解释和岩石圈动力学；后造山伸展构造的物理和数字模拟等方面，当前开展的主要研究内容、研究方法和趋势。

A REVIEW ON LATE OROGENIC EXTENSION STUDIES

Following on from the international meeting on“Late orogenic extension inmountain belts”which was held in Montpellier in March 1993,the following themes havebeen summarized in Chinese to make some of the more recent ideas about extensional col-lapse accessible to Chinese research institutions:(1)extensional tectonic patterns in thevarious mountain belts;(2) geometry and kinematics of the crustal scale detachments orlow angle normal faults,(3)uplifting mechanisms of the metamorphic core complexes andorigin and evolution of the ductile fabrics developed in them; (4) magmatic activity andthermal evolution during late orogenic extensional collapse:(5) origin and orientation ofparallel folds in extensional shear zones:(6) the formation of the late orogenic extensionalbasins;(7)interpretation of orogenic belts by geophysical data and the dynamics of litho-sphere;(8)numerical and experimental modeling of late orogenic extensional tectonics.