A Simple Shear Model for the Asymmetry in the Paleoproterozoic Fold Belt in Liaodong Peninsula  

作　　者：Cui Yingchun, Liu Junlai, Ma Lijie and Guan Huimei (Dept. Earth Sci., Jilin University, Changchun 130061 P.R. China) 

出　　处：《Global Geology》2001年第1期26-33,共8页世界地质（英文版）

基　　金：The paper is partly funded by the NNSFC project NO, 49872071

摘　　要：Several aspects of the Liaodong Paleoproterozioc fold belt, including its components, tectonic, metamorphic and magmatic characteristics are discussed in the paper, with emphasis on the asymmetry of the fold belt and differences between the northern lineal-fold belt and the southern dome-fold belt. It is suggested that the fold belt is one magmatic passive margin, instead of a rift zone or the classical passive continental margin. The formation and evolution of the fold belt is dis- cussed with a simple shear model, which may best explain the co-existence of contemporaneous tectonic facies with different characteristics, the volcanic and plutonic activities, sedimentary formations and their geological attributes etc.Several aspects of the Liaodong Paleoproterozioc fold belt, including its components, tectonic, metamorphic and magmatic characteristics are discussed in the paper, with emphasis on the asymmetry of the fold belt and differences between the northern lineal-fold belt and the southern dome-fold belt. It is suggested that the fold belt is one magmatic passive margin, instead of a rift zone or the classical passive continental margin. The formation and evolution of the fold belt is dis- cussed with a simple shear model, which may best explain the co-existence of contemporaneous tectonic facies with different characteristics, the volcanic and plutonic activities, sedimentary formations and their geological attributes etc.

关 键 词：Liaodong  differentiation  MAGMATIC passive CONTINENTAL margin  SIMPLE shear model 

分 类 号：P542[天文地球—构造地质学]