摘要
为查明宗务隆构造带西段物质组成、变形特征及演化特征,运用野外地质剖面测制、岩石组合分析、LA-ICP-MS锆石U-Pb同位素定年等手段进行了调查研究,认为宗务隆裂谷带是在初始小洋盆或有限小洋盆的基础上发展起来的,是基于南祁连陆块与欧龙布鲁克陆块之间的前寒武纪结晶基底和早古生代加里东褶皱基底的基础上经历了陆内拉张、有限洋盆发育、俯冲-碰撞和碰撞后推覆造山等过程演化而发展起来的华力西-印支期造山带。研究结果为宗务隆构造带西段物质组成及演化特征提供了理论依据。
In order to ascertain the composition, deformation characteristics and evolution characteristics of the western segment in Zongwulong tectonic belt, field geological profiling, rock assemblage analysis and LA-ICP-MS zircon U-Pb isotope dating were used for investigation. The Zongwulong rift belt developed on the basis of initial small oceanic basin or limited small oceanic basin, which was based on the precambrian crystalline basement and early paleozoic caledonian folds between the South Qilian and Oulong brook blocks, and on the foundation, the Warrenian-Indosinianorogenic belt developed by continental evolution, finite oceanic basin development, subduction-collision and post-collisional overtaking orogeny. The results provide a theoretical basis for the material composition and evolution characteristics of the western Zongwulong ectonic belt.
作者
许海全
严玉峰
屈光菊
袁锦鹏
王钦元
XU Haiquan;YAN Yufeng;Qu Guangju;YUAN Jinpeng;Wang Qinyuan(Geological Survey Institute of Qinghai,Xining 810012,China;Key Laboratory of Geological Process and Mineral Resources in Northern Qinghai-Tibet Plateau,Xining 810012,China;The Third Geological Exploration Institute of Qinghai,Xining 810029,China)
出处
《青海大学学报（自然科学版）》
2019年第3期87-93,共7页
Journal of Qinghai University(Natural Science)
基金
中国地质调查局西安地质调查项目(12120114005501)
关键词
宗务隆构造带
物质组成
演化特征
青海省
Zongwulong ectonic belt
material composition
evolutionary characteristics
Qinghai province
