气候变化领域集成服务门户(CCPortal): Incision rate of the Yellow River in Northeastern Tibet constrained by Be-10 and Al-26 cosmogenic isotope dating of fluvial terraces: implications for catchment evolution and plateau building

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DOI	10.1144/SP353.10
	Incision rate of the Yellow River in Northeastern Tibet constrained by Be-10 and Al-26 cosmogenic isotope dating of fluvial terraces: implications for catchment evolution and plateau building
	Perrineau, A.; Van Der Woerd, J.; Gaudemer, Y.; Jing Liu-Zeng; Pik, R.; Tapponnier, P.; Thuizat, R.; Zheng Rongzhang
通讯作者	Perrineau, A (通讯作者)
发表日期	2011
ISSN	0305-8719
起始页码	189
结束页码	219
卷号	353
英文摘要	Unlike other large rivers flowing out of Tibet, the Yellow River escapes from the plateau towards the NE crossing no less than five NW-SE striking, actively growing ranges and intervening basins. Thick Plio-Quaternary deposits and fluvial terraces testify to a phase of aggradation and sediment infill up to the average surface elevation (3200-3250 ma.s.l.) of the Gonghe, Guide and Qinghai Lake basins. A set of seven main terraces across the Gonghe Basin suggests progressive down-cutting of the Yellow River carving the 500 m deep Longyang gorge at the basin exit. Be-10 and Al-26 concentrations in quartz of surface and sub-surface samples of four terraces constrain the timing of incision by determining the burial age of the deposit and the exposure age of its surface. Modelling the depth dependence of the Be-10 concentration and the Al-26/Be-10 ratio allows us to constrain the onset of the ongoing phase of incision to 120-250 ka. These ages suggest long-term incision rates between 2-6 mm a(-1). Together with the present morphology of the Yellow River terraces across the Gonghe basin and the Longyang gorge, our results imply rapid river catchment evolution and interaction between river dynamics, tectonic and climate in northeastern Tibet.
关键词	INDIA-ASIA COLLISION LATE CENOZOIC DEFORMATION QINGHAI LAKE QILIAN-SHAN PANNONIAN BASIN GUIDE BASIN SLIP-RATE CHINA UPLIFT GROWTH
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Geology
WOS类目	Geochemistry & Geophysics ; Geology
WOS记录号	WOS:000288487200010
来源期刊	GROWTH AND COLLAPSE OF THE TIBETAN PLATEAU
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257959
推荐引用方式 GB/T 7714	Perrineau, A.,Van Der Woerd, J.,Gaudemer, Y.,et al. Incision rate of the Yellow River in Northeastern Tibet constrained by Be-10 and Al-26 cosmogenic isotope dating of fluvial terraces: implications for catchment evolution and plateau building[J]. 中国科学院青藏高原研究所,2011,353.
APA	Perrineau, A..,Van Der Woerd, J..,Gaudemer, Y..,Jing Liu-Zeng.,Pik, R..,...&Zheng Rongzhang.(2011).Incision rate of the Yellow River in Northeastern Tibet constrained by Be-10 and Al-26 cosmogenic isotope dating of fluvial terraces: implications for catchment evolution and plateau building.GROWTH AND COLLAPSE OF THE TIBETAN PLATEAU,353.
MLA	Perrineau, A.,et al."Incision rate of the Yellow River in Northeastern Tibet constrained by Be-10 and Al-26 cosmogenic isotope dating of fluvial terraces: implications for catchment evolution and plateau building".GROWTH AND COLLAPSE OF THE TIBETAN PLATEAU 353(2011).