黄河上游第四纪河流地貌演化——兼论青藏高原1∶25万新生代地质填图地貌演化调查

张智勇; 于庆文; 张克信; 顾延生; 向树元

Volume 28 Issue 6

Nov. 2003

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Article Navigation > Earth Science > 2003 > 28(6): 621-626

ZHANG Zhi-yong, YU Qing-wen, ZHANG Ke-xin, GU Yan-sheng, XIANG Shu-yuan, 2003. Geomorphological Evolution of Quaternary River from Upper Yellow River and Geomorphological Evolution Investigation for 1∶250 000 Scale Geological Mapping in Qinghai-Tibet Plateau. Earth Science, 28(6): 621-626.

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Geomorphological Evolution of Quaternary River from Upper Yellow River and Geomorphological Evolution Investigation for 1∶250 000 Scale Geological Mapping in Qinghai-Tibet Plateau

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Chinese Geological Survey, Beijing 100035, China

Received Date: 2003-04-18
Publish Date: 2003-11-25

Abstract

Abstract

The Cenozoic geomorphological evolution investigation method is used for 1∶250 000 scale geological mapping in Qinghai-Tibet plateau, which clarifies the geomorphological features and geomorphological distributing and their ages and also helps the analysis of geomorphology origin and the relationship of geomorphology, tectonism, climate and sediments. Meanwhile, the investigation of the representatives, planation surfaces and terrace which indicates the uplifting processes also enables us to analyze the geomorphology evolution and reconstruct its history in a certain region. Given the result of investigation on terrace geomorphology in Yangqu of the upper reaches of the Yellow River, the authors deduce that Nanshan, Guinan has been cut through by the Yellow River before 0.03 Ma. The comparison between different terraces in various places of the Yellow River indicates that its geomorphological (evolution) is accompanied by episodic uplifting of the Tibet plateau and related episodic toward the source. Four stages can be recognized here. Firstly, in 1.6 Ma, the Yellow River stabilized in Minhe-Lanzhou-Linxia. Secondly, in 1.1 Ma, it cut through Jishi canyon and arrived in Hualong-Guide. Thirdly, in (0.15 Ma), it appeared in the Gonghe basin after splitting Longyan canyon. Fourthly, after the latest uplifting event around, it cut through Nanshan, Guinan and western Qinling, and reached the source of the Yellow River passing Ruoergai basin.
- upper Yellow River,
- Qinghai-Tibet plateau,
- geological mapping,
- geomorphology evolution,
- terrace

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References(14)

References

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