| 从阶地砾石的统计特征看保德至克虎段河流演化 |
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| 引用本文： | 刘运明,李有利,吕红华,李新坡.从阶地砾石的统计特征看保德至克虎段河流演化[J].地理科学,2007,27(4):567-572. |
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| 作者姓名： | 刘运明 李有利 吕红华 李新坡 |
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| 作者单位： | 北京大学地理科学中心地表过程分析与模拟教育部重点实验室,北京,100871 |
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| 基金项目： | 国家自然科学基金项目(40071016)资助 |
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| 摘 要： | 通过对保德至克虎段不同地点砾石的岩性、粒径和产状的野外统计与测量,并对不同地点和不同阶地上砾石的岩性、粒径和产状进行对比,发现同一地区不同阶地砾石岩性具有很好的相似性,不同地区同一阶地砾石中灰岩砾石成分从上游向下游由主导成分变为次要成分,灰岩砾石粒径也从大变小,反映该区砾石为南北向古黄河冲积物。由于较老的一套砾石层为晚第三系红粘土所覆盖,说明黄河至少在晚第三纪已经在该区已形成。
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| 关 键 词： | 砾石统计 河流阶地 山陕峡谷 地貌演化 黄河 |
| 文章编号： | 1000-0690（2007）04-0567-06 |
| 收稿时间： | 2006-04-18 |
| 修稿时间： | 2006-08-27 |
Implication of Statistical Features of Terrace Pebbles to River Evolution from Baode County to Kehu Town |
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| LIU Yun-Ming,LI You-Li,LU Hong-Hua,LI Xin-Po.Implication of Statistical Features of Terrace Pebbles to River Evolution from Baode County to Kehu Town[J].Scientia Geographica Sinica,2007,27(4):567-572. |
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| Authors: | LIU Yun-Ming LI You-Li LU Hong-Hua LI Xin-Po |
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| Institution: | MOE Laboratory for Earth Surface Processes and Department of Geography, Peking University, Beijing 100871 |
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| Abstract: | The lithology,grain size and orientation of the pebbles in different sites and on different river terraces have been studied along the Huanghe(Yellow) River from Baode to Kehu in the Shanxi-Shaanxi Gorge area.It is found that the pebbles are similar in lithology on different terraces in the same region,as well as on the same terrace from the upstream to the downstream.The grain sizes of limestone pebbles have a tendency of becoming smaller from upstream to downstream.This indicates the pebbles maybe the relics of the ancient Huanghe River.Because the highest pebbles are covered by late-Tertiary red clay,it is concluded that the Huanghe River run through this area at least in late Tertiary. |
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| Keywords: | pebble statistic river terrace Shanxi-Shaanxi gorge landform evolution Yellow River |
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