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DOI:
地质力学学报:1999,5(3):22-27
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宁夏南部弧形推覆构造带特征及演化
THE FEATURE AND FORMATION MECHANISM OF ARCIFORM THRUST-NAPPE STRUCTURE ZONE OF THE SOUTHERN NINGXIA
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投稿时间:1999-07-20    
中文摘要: 宁夏南部弧形构造带主要由四大弧形推覆构造带组成,总体走向NW,凸向NE呈弧形展布,延伸150km~300km.每带又分为多个逆冲岩席和后缘断陷盆地,构成较典型的盆-山格局。它的形成是由于燕山期以来,地幔深部物质的运移或对流,引起上部壳内物质的侧向运动,沿能干性弱的层面滑脱,造成前缘的逆冲推覆和后缘的伸展滑覆、拉伸断陷,地壳随之增厚或减薄,形成盆-山构造体系。
Abstract:The southern Ningxia's arciform structure zone, extending 150~300km, consists of four great arcuate thrust-nappe structural belts with a convex toward the northeast.Every belt is composed of many thrust sheets and back margin fault basin.They formed typical basin-range structures.Since Yanshanian movement because of movenent and convection of upper mantle substance took place intracrust substance lateral movement, detachment along the layer surface of incompetent, forming thrust-nappe on the front margin while extensional gliding and tensional fault depression on the back margin, accompanied with that the crust was thicker or thinner, at the end the basin-range structure were formed.
文章编号:     中图分类号:P542    文献标志码:
基金项目:原地质矿产部1/5万区调科研专题
引用文本:
李天斌,1999.宁夏南部弧形推覆构造带特征及演化[J].地质力学学报,5(3):22-27.DOI:
LI Tian-bin,1999.THE FEATURE AND FORMATION MECHANISM OF ARCIFORM THRUST-NAPPE STRUCTURE ZONE OF THE SOUTHERN NINGXIA[J].Journal of Geomechanics,5(3):22-27.DOI:

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