A red clay layer in soils of the Yellow River Delta: Occurrence, properties and implications for elemental budgets and biogeochemical cycles

doi:10.1016/j.catena.2018.09.015

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	A red clay layer in soils of the Yellow River Delta: Occurrence, properties and implications for elemental budgets and biogeochemical cycles
	Li Y; Zhang HB; Fu CC; Tu C; Luo YM; Christie P
发表期刊	Catena
ISSN	0341-8162
	2019
卷号	172 页码:469–479
关键词	Clay layer Coastal zone Elemental geochemistry Yellow River Delta
研究领域	Geology ; Agriculture ; Water Resources
DOI	10.1016/j.catena.2018.09.015
产权排序	1
作者部门	海岸带环境过程实验室
英文摘要	Clay-Aenriched layers occurring in deltas are important as they reveal erosion, transportation and deposition of source materials from the basin to the coast. In the Yellow River Delta a red clay layer (RCL) with a thickness of 5-50 cm at 1 m depth in the soil profile occurs in the floodplain area dominated by fluvo-aquic soil derived from Yellow River sediments. The RCL typically has a median grain size of < 20 mu m, redness (a*) of > 7, and relatively high contents of illite, calcite and iron oxides. In the Loess-Yellow River sediment-Yellow River Delta soil continuum a regime of weathering, mechanical sorting and dilution by carbonates and silica have been important factors altering the elemental geochemistry. The abundance of secondary minerals and deficiencies of silica and zircon in the RCL suggest that it was separated from a mixed source and was likely derived from highly weathered sediments (such as paleosol) from the basin. RCL samples show substantial accumulation of inorganic carbon with enhancement of the organic carbon content, indicating that increasing organic carbon in alkaline soils may lead to an increase in inorganic carbon in the subsoil. Large variations in elemental ratios have been found in the RCL characterized by excess nitrogen and trace metals and phosphorus deficiency due to adsorption and weathering effects. Implementation of the water-sediment regulation scheme (WSRS) may have altered the sedimentary environment and may have aggravated an elemental imbalance due to the occurrence of the yellow silt layer (YSL)-RCL sequence and thereby impacted biogeochemical cycling in the river-delta-coast continuum.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	UPPER CONTINENTAL-CRUST ; WATER-SEDIMENT REGULATION ; CHINESE LOESS PLATEAU ; ORGANIC-CARBON ; PALEOCLIMATIC IMPLICATIONS ; INORGANIC CARBON ; LOWER REACHES ; BOHAI SEA ; HUANGHE ; EVOLUTION
研究领域[WOS]	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000449136800044
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/24149
专题	中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室中国科学院海岸带环境过程与生态修复重点实验室
通讯作者	Luo YM
推荐引用方式 GB/T 7714	Li Y,Zhang HB,Fu CC,et al. A red clay layer in soils of the Yellow River Delta: Occurrence, properties and implications for elemental budgets and biogeochemical cycles[J]. Catena,2019,172:469–479.
APA	Li Y,Zhang HB,Fu CC,Tu C,Luo YM,&Christie P.(2019).A red clay layer in soils of the Yellow River Delta: Occurrence, properties and implications for elemental budgets and biogeochemical cycles.Catena,172,469–479.
MLA	Li Y,et al."A red clay layer in soils of the Yellow River Delta: Occurrence, properties and implications for elemental budgets and biogeochemical cycles".Catena 172(2019):469–479.