摘要
塔里木盆地西北缘西南天山喀拉塔拉一带晚古生代石炭纪-二叠纪火山岩岩石地球化学具有板内碱性玄武岩的属性特征,结合同时代沉积岩岩石组合、沉积层序等分析,确定塔西北缘自晚志留世到早二叠世处于陆缘海盆地裂解的构造演化阶段。早二叠世末期发生全球性造山运动,晚二叠世之后回返褶皱造山,之后转入中-新生带后造山及陆内成盆演化阶段。通过对晚古生代火山岩的研究,对塔北缘构造带的划分及构造演化史的重建提供了重要依据。
In the kalatala area,southwest Tianshan tarim basin,the late Paltozoic carbouiferous-Permian volcanic rocks have the properties of intraplate alkali basalt in geochemistry and based on the analysis on the same period sedimentary rocks and sedimentary layer seguence,the tectonic evolution stages in tarim northwest margen from the late silurian to early permian in epicontinental sea basin splitting are determined.The stages are ：early Permian end global orogeny,late Permian fold orogeny,Mesozoic era orogeny and intracontinental basin-formation stage.This research provids an important basis for the reconstruction of the tecfonic evlution histary and the dicision of Northen tarim margen tectonic belt.
出处
《青海大学学报（自然科学版）》
2011年第2期37-44,共8页
Journal of Qinghai University(Natural Science)
基金
新疆维吾尔自治区1:5万区域地质矿产调查项目(XJQDZ2004-19)
关键词
塔北缘
西南天山
晚古生代火山岩
板内碱性玄武岩
裂解海盆
Tarim northen margen
southwest Tianshan mountain
late paleozoic volcanic rock
intraplate alkal：basalt
splitting sea basin
