邦多—措麦地区新构造运动特征及其演化简析
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摘要
文章将邦多—措麦地区新构造运动划分为冈底斯北缘稳定上升区、冈底斯掀斜上升区和纵贯南北的当惹雍错—许如错地堑区。概述了研究区新构造运动以垂直运动、水平运动和火山、地震活动等为主要表现形式。从现代地貌格局、活动构造形迹、近代岩浆作用和地热、地震等方面,阐述了研究区新构造运动的基本特征。根据中新世以来的构造作用、沉积特征、岩浆活动等特征,对区内的新构造运动的演化作了初步总结,大致划分为4个强烈活动期,即中新世晚期、上新世末—早更新世初、早更新世末和中更新世末—晚更新世。
Neotectonic movements in Bangduo-Cuomai area are divided into stable rising region of the northern margin of Gangdise and tilted rising region of Gangdise as well as graben region of Dangreyongcuo -Xurucuo from south to north. Main representational forms of neotectonic movements in the research area are summarized including vertical and horizontal movements and volcanic and seismic activities, etc. The basic features of neotectonic in the region are elaborated from modern landforms patterns and active structural and recent magmatism and terrestrial heat and earthquake, etc. On the basis of the features of tectonism and sedmentary characteristics and magmatism, evolution of neotectonic in this area is classified into four active stages : late Miocene, late of Pliocene- the beginning of early Pleistocene, ending of early Pleistocene and ending of middle Pleistocene-late Pleistocene.
Neotectonic movements in Bangduo-Cuomai area are divided into stable rising region of the northern margin of Gangdise and tilted rising region of Gangdise as well as graben region of Dangreyongcuo -Xurucuo from south to north. Main representational forms of neotectonic movements in the research area are summarized including vertical and horizontal movements and volcanic and seismic activities, etc. The basic features of neotectonic in the region are elaborated from modern landforms patterns and active structural and recent magmatism and terrestrial heat and earthquake, etc. On the basis of the features of tectonism and sedmentary characteristics and magmatism, evolution of neotectonic in this area is classified into four active stages : late Miocene, late of Pliocene- the beginning of early Pleistocene, ending of early Pleistocene and ending of middle Pleistocene-late Pleistocene.
引文
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[4]邓万明.青蒇高原北部新生代板内火山岩[M].北京:地质出版社,1998.
[5]西藏自治区地质矿产局.西藏自治区区域地质志[M].北京:地质出版社,1993.
[6]施雅凤,李吉均,李炳元.青藏高原晚新生代隆升与环境变化[M].广东科技出版社,1998.
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