| 鄂尔多斯高原河曲段黄河阶地构造变形研究 |
| |
| 引用本文： | 闫小兵,李自红,赵晋泉,苏宗正.鄂尔多斯高原河曲段黄河阶地构造变形研究[J].华北地震科学,2014(1):53-58. |
| |
| 作者姓名： | 闫小兵 李自红 赵晋泉 苏宗正 |
| |
| 作者单位： | 山西省地震局;太原理工大学; |
| |
| 基金项目： | 地震行业科研专项“中国综合地球物理场观测-鄂尔多斯地块周缘地区”(项目编号:201208009) |
| |
| 摘 要： | 通过对河曲县城一带出露较好的黄河阶地剖面进行研究，认为河曲一带黄河三、四级阶地形成于中更新世时期，晚更新世早期形成二级阶地，全新世形成一级阶地。本区中更新世抬升速率为0．14mm／a，晚更新世抬升速率为0．18mm／a，全新世抬升速率为0．70mm／a，晚更新世和全新世抬升速率的突然加大，可能与黄河下游三门湖的贯通、区域侵蚀基准面突然降低、河流侵蚀加大有关。
|
| 关 键 词： | 黄河阶地 夷平面 构造变形 河曲段 |
Study on Tectonic Deformation of Yellow River Terrace in Erdos Hequ Section |
| |
| YAN Xiao-bing,LI Zi-hong,ZHAO Jin-quan,SU Zong-zheng.Study on Tectonic Deformation of Yellow River Terrace in Erdos Hequ Section[J].North China Earthquake Sciences,2014(1):53-58. |
| |
| Authors: | YAN Xiao-bing LI Zi-hong ZHAO Jin-quan SU Zong-zheng |
| |
| Institution: | 1. Earthquake Administration of Shanxi Province, Taiyuan 030021, China; 2. Taiyuan University of Technology, Taiyuan 030024, China) |
| |
| Abstract: | This paper study the well exposed profiles of Yellow River terraces in Hequ county area. The re- sult shows that the Yellow River three or four grade terraces in this section were formed in the Pleistocene period, second grade terraces were formed in early Late Pleistocene and first grade terraces were formed in Holocene. In this area, the Middle Pleistocene uplift rate is 0.14 mm/a, the late Pleistocene uplift rate is 0.18 mm/a, the Holocene uplift rate is 0.70 mm/a. The sudden increasing of uplift rate in late Pleistocene and Holocene may be related to through of Sanmen Lake in lower reaches of the Yellow River, regional base level of erosion decreasing and river erosion increasing. |
| |
| Keywords: | Yellow river terrace planation surface tectonic deformation Hequ section |
| 本文献已被 CNKI 维普 等数据库收录！ |
