气候变化领域集成服务门户(CCPortal): Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau

CCPortal

DOI	10.1007/s11430-007-2021-5
	Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau
	Fu KaiDao; Fang XiaoMin; Gao JunPing; Han WenXia; Li LiLi
发表日期	2007
ISSN	1006-9313
起始页码	81
结束页码	91
卷号	50 期号:1
英文摘要	The widely distributed thick gravel deposits along the rim of the Tibetan Plateau have been long thought to be the product of rapid tectonic uplift of the plateau. However, this has been challenged by recent works that suggest these thick gravels may be the result of climate change. In this paper we carried out a detailed field measurement of gravel grain sizes from the Jiuquan and Gobi Gravel Beds in the top of the Laojunmiao section in the Jiuxi Basin in the northern margin of Qilian Mts. (northern Tibetan Plateau). The results suggest that the grain sizes of the Jiuquan and Gobi Gravel Beds over the last 0.8 Ma are characterized by nine coarse-fine cycles having strong 100-ka and 41-ka periodicities that correlate well with the loess-paleosol monsoon record and isotopic global climatic record from deep sea sediments as well as by a long trend of coarsening in gravel grain size. The coarse gravel layers were formed during the warm-humid interglaciations while the fine layers correspond to the cold-dry glaciations. Because the paleoclimate in NW China began to get dramatically drier after the mid-Pleistocene, we think the persistent coarsening of gravel grain size was most probably caused by the rapid uplift of the northern Tibetan Plateau, and that the orbital scale cyclic variations in gravel grain size were driven by orbital forcing factors that were superimposed on the tectonically-forced long-term coarsening trend in gravel size. These findings also shed new light on the interaction results of climate and tectonics in relation to the uplift of the Tibetan Plateau.
关键词	ACCUMULATION RATES EROSION UPLIFT SEDIMENT DEPOSITS BASIN
英文关键词	Tibetan Plateau; Jiuxi Basin; gravels grain sizes; climate changes; tectonics
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000244621300009
来源期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
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/257474
推荐引用方式 GB/T 7714	Fu KaiDao,Fang XiaoMin,Gao JunPing,et al. Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2007,50(1).
APA	Fu KaiDao,Fang XiaoMin,Gao JunPing,Han WenXia,&Li LiLi.(2007).Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(1).
MLA	Fu KaiDao,et al."Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.1(2007).