IMHE OpenIR  > 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
Corresponding AuthorZhang, XB
AbstractA 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.
KeywordPlanation Denudation Threshold Landform Evolution Tibet Plateau China
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000261262200003
Funding OrganizationNational Natural Sciences Foundation of China(40599421 ; 90502002)
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2008_Vol5 No.4
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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