摘要
阴山地区位于阴山—燕山中生代板内造山带西部。印支期地壳活动以南北向水平挤压变形为主,形成一系列东西方向展布的大型褶皱构造和逆冲推覆构造,构成阴山地区中生代造山带主体构造格架。根据沉积作用、岩浆活动和不同构造要素之间叠加改造关系,把阴山地区印支期地壳构造演化划分为三个不同阶段:早期以小型山间盆地沉积作用为主,其内堆积了一套陆相粗碎屑沉积建造和火山沉积建造;中期以褶皱作用为主,形成了大青山复式向斜和一些紧闭同斜褶皱构造;晚期以逆冲作用为主,并伴随有强烈的岩浆活动,形成了大型逆冲推覆构造。
Yinshan locates western Yinshan-Yanshan Mesozoic intracontinent orogenic belt. Crust structural deformation was dominant of south-north horizontal compression deformation mechanism during Indosinian episode. It had been formed a series of east-west direction large folds and thrusts which is the main structural outline of Yinshan Mesozoic orogenic belt. According to the sedimention, magma activity and the modified and superimposed relationship among different structural elements, Indosinian episode crust structural evolution can been divided into three stages. The early one is sedimention of small intermountain basin which accumulated continental detrital formation and volcanic deposition formation. The middle one is folding stage which formed Daqingshan compound sycline and tight isoclinal fold. The thrusting process happened in late stage and formed large thrust napes acompanying strong magma activity.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2003年第1期1-6,共6页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(49872071)
中国地调局区调项目(200113000021)
