摘要
后碰撞演化阶段的构造变形研究,是目前造山带研究中相对薄弱的环节。根据野外调查和室内研究,本文作者论述了新疆东部哈尔里克山北坡口门子逆冲型韧性剪切带的特征,提出了哈尔里克山在二叠纪期间经历了向北北东30°方向的逆冲型韧性剪切构造变形的新认识。对同变形的绢云母^(40)Ar-^(39)Ar定年,获得259±1Ma冷却年龄。结合区域上其他年代学和地质资料的综合研究,我们认为哈尔里克山在二叠纪中期遭受了后碰撞近南北向挤压构造变形的改造,其峰期约为259Ma左右。
Research on the post-collisional structural deformation in the orogenic belt is a weak study field. The authors state the feature of the Koumenzi ductile shear zone of thrusting-type in northern slope of Harlik Mountains in this paper based on field investigations and in-door researches, and suggest that the Harlik Mountains has experienced the NNE30-vergent ductile shear zone of thrusting-type resulted from the NS-compression during the Permian. A sericite sample collected from the thrusting belt is dated by ^40Ar-^39Ar method, and yields an age of 259 ± 1Ma. In combination with other available chronological and geological data, we suggest that this NS-compression which occur during post-collisional stage in Harlik Mountains occur at middle Permian, with about 259Ma of the deformational peak.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期1359-1368,共10页
Acta Petrologica Sinica
基金
国家重要基础研究发展规划项目'中国西部中亚型造山与成矿'综合研究课题'中亚型造山与成矿综合研究'(编号2001CB409810)资助.
