论文部分内容阅读
西藏阿里札达地区基本构造格架是由一系列褶皱、断裂、岩浆岩带和动力变质带组成的一套北西向构造系统,起源于晚侏罗世以来印度—欧亚板块俯冲—碰撞和陆内会聚作用。按照板块运动时间顺序,可区分出早、晚两阶段构造组合。早阶段构造组合与板块俯冲—碰撞有关,形成缝合带—陆缘弧系统;晚阶段构造组合与陆内会聚有关,形成基底断块系统。札达盆地与高喜马拉雅断块隆起存在盆—山耦合关系,藏南谷地基底断块的翘板式运动是形成盆地的主要控制因素。
The basic tectonic framework of the Ali Zanda region in Tibet is a set of NW-trending structural systems consisting of a series of folds, faults, magmatic rocks and dynamic metamorphic belts. It originated from the subduction-collision of the Indo-Eurasian plate and continental Convergence within the role. According to the plate movement time sequence, can distinguish early and late two-stage structure combination. The early stage tectonic assemblage is related to the plate subduction-collision and forms a suture zone-continental margin arc system. Late stage tectonic assemblages are related to intracontinental convergence and form a basement fault block system. The basin-mountain coupling relationship exists between the Zanda basin and the high Himalaya fault block uplift, and the rocker plate movement of the basement block in the southern Tibet valley is the main controlling factor for the basin formation.