宁夏香山地区弧形挤入推覆构造带特征及演化规律探讨  

Characteristics and evolution of the arc-shaped thrust nappe belt in Xiangshan area in Ningxia

作　　者：李红霞[1] 李天斌[1] 白生明[1] 房正荣 

机构地区：[1]宁夏国土资源调查监测院,宁夏银川750004

出　　处：《世界有色金属》2017年第24期173-175,共3页World Nonferrous Metals

摘　　要：宁夏香山地区作为早古生代贺兰裂谷的一部分,自早奥陶世马家沟组台地碳酸盐岩沉积至中—晚奥陶世米钵山组、香山群裂谷型一套巨厚的碎屑岩夹碳酸盐岩、硅质岩类复理石沉积,代表华北板块南缘被动大陆边缘浅水台地—裂陷槽沉积。志留纪末的加里东运动揭开了香山褶皱造山带的序幕。华力西期造山带北缘发展为前陆盆地,广泛沉积了泥盆系—石炭系。后经华力西—印支运动的褶皱逆冲作用及燕山运动逆冲推覆作用强化,造山带基本定型,并发展为一大型前陆逆冲推覆构造带。燕山运动、喜马拉雅运动在造山带前缘及其两侧再次活化,促使褶皱逆冲推挤进一步加剧,形成弧形挤入推覆构造带。The Ningxia Xiangshan area as part of the early Paleozoic Helan rift,since the early Ordovician Majiagou Formation carbonate platform deposition to the middle Late Ordovician Shimi Balsan group,Xiangshan Group,a rift type thick clastic rock carbonate rocks,siliceous rocks flysch,representing sedimentary rift trough split the passive continental margin of the North China plate and shallow water platform.At the end of Silurian Caledonian Prelude Xiangshan orogenic belt.The northern Variscan orogenic belt developed foreland basin,widely deposited in the Devonian carboniferous.After the Variscan Indosinian movement of thrusting and thrusting movement of Yanshan orogenic belt strengthening,the basic shape,and the development of a large thrust nappe tectonic belt.The Yanshan movement and Himalaya movement reactivated on the leading edge of the orogenic belt and their sides,which promoted the thrusting and pushing up of the fold and further formed the arc driven push nappe tectonic belt.

关 键 词：弧形挤入推覆构造带 特征 演化规律 香山地区 宁夏 

分 类 号：S157[农业科学—土壤学]