青海南山断裂晚第四纪构造活动及其与地貌气候耦合作用研究

项目名称： 青海南山断裂晚第四纪构造活动及其与地貌气候耦合作用研究

项目编号： No.41302174

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 谢虹

作者单位： 中国地震局兰州地震研究所

项目金额： 25万元

中文摘要： 本课题拟在高分辨率卫星影像解译的基础上，通过野外地质调查、典型断错地貌差分GPS测量与多手段地貌年代测试等方法，对青海南山断裂晚第四纪构造活动特征进行综合研究，获得该断裂的几何结构、运动特性、滑动速率等定量参数和变形模式，估算其构造隆升的速率和幅度。在此基础上，通过对青海南山南北两侧的茶卡-共和盆地北缘典型冲洪积阶地和青海湖盆地南缘典型湖岸阶地的岩性岩相对比分析，结合沉积环境分析（孢粉和同位素等）和年代测试，探讨本区构造活动、气候作用对阶地等地貌发育的控制或影响作用，综合分析青海南山地区构造-地貌-气候的耦合作用，为认识和理解青藏高原构造隆升及其气候环境效应提供新的科学依据。

中文关键词： 青海南山；构造地貌；青海南山断裂；；

英文摘要： Based on the high resolution remote sensing image interpretation, a comprehensive study of late Quaternary tectonic activity of Qinghai NanShan fault is explored through geological field surveys, differential GPS measuring of typical dislocation landforms and different dating methods, by these methods, we get the quantitative parameters and deformation model such as geometric characteristic, movement characteristic as well as slip rate. On this basis, the lithology and lithofacies of typical fluvial terrace in north margin of Chaka- Gonghe basin and lake terrace in south margin of Qinghai lake to the south and north of Qinghai NanShan are compared, furthermore, we quantify the contribution and discuss the influence of regional tectonic activity and climate change to terrace development by combining analysis of sedimentary environment (pollen, carbon and oxygen isotope), dating results and tectonic characteristic. Overall, our study analyzes the coupled influence of tectonic-landform-climate of Qinghai Nanshan region. It provides a helpful and new scientific evidence to understand the uplift of Tibetan plateau and its climate effect.

英文关键词： Qinghai nanshan；tectonic geomorphology；Qinghai nanshan fault；；