摘要
印度板块与欧亚板块的碰撞,引发了青藏高原的快速隆升、高原及邻区的气候环境、地形地势巨变,这一过程为同期形成的海洋沉积盆地、周缘前陆盆地和高原内部盆地所记录。高原隆升剥蚀区与前述三种类型的汇水盆地基本上处于一个相对封闭和半封闭体系,因而,可以根据质量平衡的原则,将汇水盆地内的沉积物按照物源方向和一定的分配方案回剥至隆升剥蚀区,重建任一时间段内剥蚀区的地形地势。通过对比不同时间段的古地形地势演变,可以比较精确和全面地刻划高原的隆升过程、隆升和剥蚀速率、隆升后所达到的海拔高度,进而探讨隆升与气候的关系。
The collision of the Indian subcontinent with Eurasia was responsible for the rapid uplift, great changes of climate, environment, and topography in the Tibet plateau and nearby areas. This process was recorded by the basins developed simultaneously in marine, peripheral foreland basins and inner basins in plateau. They are in a relative closed or semi closed system between the range of uplift and erosion in plateau and the accumulation basin noticed as before. Hence, based on mass balance between erosion and sediment, the topography in the plateau in any time interval can be reconstructed, if sediments deposited in a catchment basin are distributed back to the erosion region in plateau as catchment surface of basin and distribution proportion. The uplift history, rates of uplift and denudation, altitude reaching after uplift can be revealed accurately by comparing paleotopography evolution in different time intervals, and the topics, such as the climate and environment influence caused by uplift, and plateau overgrown or shrink during collision, can be sought further .
出处
《成都理工学院学报》
CAS
CSCD
2000年第1期1-7,共7页
Journal of Chengdu University of Technology
基金
国家重点基础研究计划 !( 1 9980 4 0 80 0 )
国土资源部"GIS支持下的青藏高原隆升与沉积响应研究"
教育部海洋地质实验室 ( 990 5 )
关键词
青藏高原
新生代
沉积盆地
构造隆升
古地形重建
Tibet plateau
Cenozoic
sedimentary basin
tectonic uplift
paleotopographic reconstruction
mass balance
