摘要
造山带和盆地,作为在时—空演化和构造动力学系统中有关联的构造体,不仅在空间上相互依存,而且在深部结构、物质迁移及动力学机制上密切相关。首先利用磷灰石裂变径迹实验手段,分析了秦岭—大别造山带的隆升与剥露速率,运用构造变形组合分析和构造—热模拟相结合得出主要地质事件,并着重揭示出中新生代秦岭—大别造山带存在多阶段的差异隆升与剥露现象,得出一个定性和定量后造山剥露过程的区域演化模式。然后,在综述中新生代秦岭—大别造山带演化过程及其区域环境效应的基础上,以长江三峡的形成和长江水系变迁的关系,以及三峡工程的兴建及其导致洞庭的变迁为例,探讨了盆—山体系演化过程对地貌景观的变化、水系变迁、生态环境演替以及流域系统演变的影响。
As the structural body in relation to temporal-spatial evolution and tectonic dynamic system,the orogenic belt and basin are not only dependent of one another in space,but closely related in terms of infrastructure,matter transference and dynamic mechanisms.By using apatite fission-track method ,the authors firstly analyzed the uplift and exhumation ratio of Qinling-Dabie orogenic belt,and by using tectonically deformed combination analysis and tectonic-thermal simulation the main geological occurrences were also illustrated.It is found that there must have had multi-phase differential uplift and exhumation phenomena in Qinling-Dabie orogenic belt during Mesozoic-Cenozoic.Then,the regional evolution pattern of qualitative and quantitative denudation process is resulted during post-orogenic period.On the bases of summarizing evolution process of basin-range system in Qinling-Dabie orogenic belt during the Mesozoic-Cenozoic and its effects on regional environment,the influence of evolution process on geomorphologic landscapes change,water system vicissitude,eco-environment succession and drainage basin system evolution was discussed.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2003年第5期450-456,共7页
Resources and Environment in the Yangtze Basin
基金
中国科学院院长基金特别支助项目"大别造山带裂变径迹年代及构造热历史研究"(1999)资助.
