摘要
新疆西天山造山带位于古亚洲构造域的中南部,古生代岩浆活动强烈,侵入岩发育。文章系统总结了新疆西天山古生代侵入岩的时空分布、地质特征及其地球化学特征,认为其是南、北天山洋盆演化的产物,早石炭世及其以前的古生代侵入岩呈带状分布于各山系中,主要为一套与洋盆收敛俯冲有关的钙碱性侵入岩,晚石炭世及其之后的古生代侵入岩则具有面状分布的特征,主要为一套与同碰撞有关的富铝花岗岩和后造山的富钾花岗岩。
Western Tianshan orogenic belt of Xinjiang is in the central and southern part of ancient Asian tectonic region where magmatic activities were very intense in the Paleozoic and intrusive rocks extensively developed.This paper sums up the space-time distribution,geological characteristics and geochemical features of Paleozoic intrusive rocks in Western Tianshan,and they are considered as the products of the South and North Tianshan oceanic basin evolution.In the Early Carboniferous and before,Paleozoic intrusive rocks are zonally distributed in the mountains and they are mainly a set of calc-alkaline intrusive rocks related to convergence and subduction of oceanic basins.In the Late Carboniferous and after,Paleozoic intrusive rocks presents planar distribution,and they are mainly a set of Al-rich granite related to collision and a set of post-orogenic K-rich granite.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2011年第2期170-179,共10页
Earth Science Frontiers
基金
"十一五"国家科技支撑计划重点项目(2006BAB07B0802)
中国博士后科学基金特别资助项目(200902617)
国家地质矿产调查评价专项计划项目(1212010050504-1)
关键词
西天山
古生代侵入岩
洋盆
Western Tianshan
Paleozoic intrusive rocks
oceanic basin
