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DOI	10.1016/j.geoderma.2015.05.012
	Aeolian dust contribution to the formation of alpine soils at Amdo (Northern Tibetan Plateau)
	Lin, Yong-Chong; Feng, Jin-Liang
通讯作者	Feng, JL (通讯作者)
发表日期	2015
ISSN	0016-7061
EISSN	1872-6259
起始页码	104
结束页码	115
卷号	259
英文摘要	The Tibetan Plateau has one of the largest distributions of alpine meadow in the world. Due to the cold climate and dominance of physical weathering conditions, coarse or massive debris prevails. Thus, pedogenesis is controlled by both the temperature and parent material. In this study, the alpine soils (Gelic Cambisol) at altitudes of 4768-4980 m in the Arndo zone of the northern Tibetan Plateau were investigated. We found that the parent materials throughout the alpine soil profiles were rich in clayey and silty minerals. Here, we focused on the origin of the soil forming materials of alpine meadows. We examined the grain size distribution, mineral compositions, trace element concentrations, and Sr-Nd isotopic compositions of the alpine soils and their potential source materials in various grain size fractions. Based on a comparison of many fingerprints, our results indicated that a red clay-rich bed at the bottom of the alpine soil profile is a residual paleo-weathering crust. Nevertheless, the parent materials in the alpine soils did not have a clear inherited relationship with the weathering products of the in situ bedrock Correspondingly, we confirmed that the parent materials in the alpine soils have an aeolian origin. The alluvial sediments, and widespread beach and lacustrine delta sediments in the Amdo zone are the main source of alpine soil materials. However, it was not clear whether sediments are the main source of aeolian dust. Aeolian dust, with a short transport distance, is one of the main components (<20 mu m and 20-300 mu m) of alpine soils. Correspondingly, we confirmed that the minor coarse components (>300 mu m) of alpine soils had a local origin, i.e., from adjacent bedrock outcrops. In contrast, long-range transport of dust had a minor role in the formation of alpine soils. In the region investigated, the aeolian dust began accumulating in the middle Holocene. On the Tibetan Plateau, one positive effect of aeolian processes is that the aeolian dust accretion is a source of parent materials and nutrients for alpine soils. (C) 2015 Elsevier B.V. All rights reserved.
关键词	SIZED QUARTZ SILT EOLIAN DUST UINTA MOUNTAINS NUTRIENT AVAILABILITY LOESS DEPOSITS FRONT RANGE CARBON PROVENANCE CHINA CLAY
英文关键词	Tibetan Plateau; Alpine meadow; Soil formation; Aeolian dust; Short-distance transport; In situ weathering; Weathering crust
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000360867800011
来源期刊	GEODERMA
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/258425
推荐引用方式 GB/T 7714	Lin, Yong-Chong,Feng, Jin-Liang. Aeolian dust contribution to the formation of alpine soils at Amdo (Northern Tibetan Plateau)[J]. 中国科学院青藏高原研究所,2015,259.
APA	Lin, Yong-Chong,&Feng, Jin-Liang.(2015).Aeolian dust contribution to the formation of alpine soils at Amdo (Northern Tibetan Plateau).GEODERMA,259.
MLA	Lin, Yong-Chong,et al."Aeolian dust contribution to the formation of alpine soils at Amdo (Northern Tibetan Plateau)".GEODERMA 259(2015).