Tectonics and structure of Qinling orogenic belt

被引：83

作者：

张国伟

孟庆任

赖绍聪

机构：

[1] Department of Geology

[2] Northwest University

[3] Xi'an

[4] China

来源：

Science in China(Series B) | 1995年 / 11期

关键词：

collisional tectonics; vertical accretionary growth; Qinling 3-D "flyover-like" model;

D O I：

暂无

中图分类号：

P542 [构造运动];

学科分类号：

070904 ;

摘要：

<正> The Qinling orogen has 2 kinds of orogenic basements.The main orogenic phase wascharacterized by the oblique subduction and collision of 3 plates at 2 suture zones.There are a numberof vertical accretionary structures under the control of deep-seated thermo-tectonic processes.The present 3-Dmodel of the.Qinling is a "flyover-like" framework.Deep geophysical field is featured by nearlysouth-north-trending anomalies,while the upper crust is dominated by east-west-trending structures.Betweenthem are the middle and lower crusts which are in a rheologieal state of the horizontally flattening.Fundamental structures of the upper crust was built during the main orogenic phase,which contains residualstructures and is intensively superposed by the late intracontinental tectonism.This tectonic model for theQinling orogen is distinct from the existing ones in that it represents a complicated development of diversetectonic regimes.This model cannot be either interpreted by an individual existing model.

引用

页码：1379 / 1394

页数：16

共 20 条

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