| 中文题名： | 晋西昕水河河流阶地的初步研究 |
| 姓名： | |
| 保密级别： | 公开 |
| 论文语种： | 中文 |
| 学科代码： | 070502 |
| 学科专业： | |
| 学生类型： | 学士 |
| 学位： | 理学学士 |
| 学位年度： | 2022 |
| 学校： | 北京师范大学 |
| 校区： | |
| 学院： | |
| 第一导师姓名： | |
| 第一导师单位： | |
| 提交日期： | 2022-05-28 |
| 答辩日期： | 2022-05-17 |
| 外文题名： | A preliminary study on the river terraces of the Xinshui River in western Shanxi |
| 中文关键词： | |
| 外文关键词： | |
| 中文摘要： |
河流地貌系统的地理单元中，河流阶地扮演的角色绝不简单。它的形成和演化记载了地质历史时期河谷的演化史，更重要的是一定程度上显现出对流域内构造带运动的响应情况。
﹀
通过野外考察记录晋陕黄河一级支流昕水河的河流阶地特征，构建详细具体的、符合当地地质背景的河流阶地判别方法；结合已有的考察结果和前人的调查论述，对比黄河晋陕峡谷段左右两侧与黄河的河流阶地序列特征，初步探讨晋陕黄河贯通南北的底界时间和构造发育的简单模式。得到（1）适用于当地的河流阶地野外识别划分体系；（2）晋陕黄河南段地质活动的时空变化特征：山体抬升强度在1.4Ma以前就呈减弱趋势，在0.5Ma时期小幅度再次活跃；在1.4Ma之后晋陕黄河东侧的构造活动范围不过黄河，或以黄河为界的西侧的构造运动明显强于东侧的山体抬升；大约在0.2Ma时晋陕黄河西侧有区别于吕梁山隆升的地质构造活动，且影响界线以黄河为界；西部山体隆升致使延河的形成与黄河南北向的贯通，黄河形成滞后于西部山体隆升抬升。 |
| 外文摘要： |
River terrace plays an important role in the formation of fluvial geomorphic system. The development of the river recorded the evolution of the landforms on both terraces in geological history, and more importantly reflected the information about the tectonic movement in the basin. The characteristics of river terraces in Xinshui River, the first tributary of Shanxi and Shaanxi Yellow River, were recorded , and a detailed and specific identification method of river terraces was constructed in accordance with the local geological background. Combined with the existing investigation results , the string attributes of river terraces on the left and right sides of the Shanxi-Shaanxi Gorge of the Yellow River and the Yellow River were in comparison, and the time of the bottom boundary of the Shanxi-Shaanxi Yellow River and the skeletal development model are preliminarily deliberated. (1) the field identification and division system of river terraces suitable for local area; (2) The temporal and spatial variation characteristics of geological activities in the southern section of the Yellow River in Shanxi and Shaanxi are as follows: the uplift intensity of the mountain weakened before 1.4Ma and became active again in 0.5Ma. After 1.4Ma, the tectonic range of the east side of the Yellow River was smaller than that of the Yellow River, or the tectonic movement of the west side bounded by the Yellow River was obviously stronger than the uplift of the east side. At about 0.2Ma, the west side of the Yellow River in Shanxi and Shaanxi was different from the Lvliang Mountain uplift, and the influence boundary is the Yellow River. The western mountain uplift resulted in the formation of Yanhe river and the north-south link of the Yellow River, and the formation of the Yellow River lagged behind the western mountain uplift.
﹀
|
| 参考文献总数： | 34 |
| 作者简介： | 北京师范大学自然地理与资源环境本科生 |
| 插图总数： | 10 |
| 插表总数： | 10 |
| 馆藏号： | 本070502/22009 |
| 开放日期： | 2023-05-28 |
谷歌
