Planation surfaces on the Tibet Plateau, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2008 > Vol5 No.4

	Planation surfaces on the Tibet Plateau, China
	Zhang Xinbao1,2 ; He Xiubin1 ; Wang Yangchun1 ; Long Yi1,3
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2008-12-01
卷号	5 期号:4 页码:310-317
关键词	planation denudation threshold landform evolution Tibet Plateau China
ISSN号	1672-6316
通讯作者	Zhang, XB
英文摘要	A planation hypothesis is proposed to explain landform evolution of the Tibet Plateau. A denudation threshold (T), the maximum potential denudation rate for a certain type of rock, is introduced to explain the combined effects of lithology and tectonics on landform evolution. If the tectonic uplifting rate (U) is equal to or less than the threshold rate (U - T), the tectonic uplifting and terrain denudation are in dynamic equilibrium, and landforms are in a steady state. The end product should be planation surfaces whether the original landforms are flat plains or deeply dissected mountains. If U > T, uplift and denudation are not able to reach a dynamic equilibrium state. The plateau surface is mostly underlain by soft rocks, such as the Mesozoic epimetamorphic argillites and Tertiary sedimentary rocks, while the mountain ranges comprise hard rocks, such as granite, gneiss and limestone. In soft rock regions, hills are low with a relative relief of mostly less than 100 m and the slopes are gentle at a gradient of < 200. In contrast, hills can maintain steep slopes in hard rock regions. The Tibet Plateau has been under an equilibrium condition between tectonic uplifting and denudation except for the mountain ranges. The plateau might have reached the present altitudes before the Quaternary.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	MOUNTAINS ; UPLIFT
收录类别	SCI
语种	英语
WOS记录号	WOS:000261262200003
公开日期	2013-08-14
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6061]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2008_Vol5 No.4 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.CAS, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.CAS, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhang Xinbao,He Xiubin,Wang Yangchun,et al. Planation surfaces on the Tibet Plateau, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2008,5(4):310-317.
APA	Zhang Xinbao,He Xiubin,Wang Yangchun,&Long Yi.(2008).Planation surfaces on the Tibet Plateau, China.JOURNAL OF MOUNTAIN SCIENCE,5(4),310-317.
MLA	Zhang Xinbao,et al."Planation surfaces on the Tibet Plateau, China".JOURNAL OF MOUNTAIN SCIENCE 5.4(2008):310-317.