干旱区生态环境知识资源中心(Arid): 淮河上游全新世黄土及其沉积动力系统研究

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	淮河上游全新世黄土及其沉积动力系统研究
其他题名	Holocene Loess and its Deposition Dynamics in the Upper Reaches of the Huaihe River
	何忠 1; 黄春长 1; 周杰 2; 庞奖励 1; 李新艳 3; 王利军 1; 隆浩 4
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:4 页码:816-823
中文摘要	对淮河上游禹州YPC剖面与陇东XJN剖面和关中盆地JYC剖面黄土沉积物进行的分析对比，发现淮河上游地区全新世黄土-土壤剖面与陇东和关中盆地具有相同的沉积和成壤变化过程，但磁化率明显低于陇东和关中盆地，而粒度明显比陇东和关中盆地粗。分析认为，淮河上游和黄土高原地区分属不同的风力系统，有不同的粉尘源区。淮河上游是近源风尘沉积物，粉尘主要来源于黄河下游泛滥平原的风沙地带。其粉尘产生和搬运的动力与黄土高原显著不同，它主要是冬半年华北平原盛行的东北风力系统。
英文摘要	The dust source and transporting system are two indispensable aspects in the process of loess-paleosol accumulation. It has been proved that the dust of the Loess Plateau mainly come from the northwestern inland Gobi and Desert, transported by the Asia monsoon systems and Westerlies. However, there are little researches with respect to the dust source and deposition dynamics of upper reaches of Huaihe River. In the present study, we investigated and collected a section (YPC section) with high-resolution in the upper reaches of Huaihe River. The chronological frame was got by correlating with the published loess time series. Magnetic susceptibility was measured on a mass of 10 g of ground sediment with a Bartington MS2-B Magnetic Susceptibility Meter. The grain size was determined using the Mastersiser-S laser analyzer with (NaPO_3)_6 as dispersing agent after pretreatment with 10% HCI and 10% H_2O_2 to remove secondary carbonates and organic material respectively. By comparison of the magnetic susceptibility and grain size of among YPC profile, XJN profile (western Loess Plateau) and the JYC profile (southern Loess Plateau), we find that the variations of the pedogenesis environment in these three profiles are very similar, but the magnetic susceptibility of loess-soil profile sequences in the upper reaches of the Huaihe River was much lower than that in the Loess Plateau, and the grain size was much coarser than that in the Loess Plateau. The contrasting on grain size for these three profiles revealed that there were different dust sources, which belonged to different dust transporting aeolian systems. The loess in the upper reaches of the Huaihe River was a wind blown deposition of near source, while the coarser dust mainly came from loose alluvial deposits of alluvial and proluvial fans of the Yellow River. The yielding and carrying dynamics of the dust in the Huaihe River is the North-East wind prevailing in the winter half year.
中文关键词	风成黄土 ; 风力系统 ; 粉尘源区 ; 淮河上游
英文关键词	aeolian dust dust transporting system dust source upper reaches of the Huaihe River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:3897093
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226004
作者单位	1.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国; 2.中国科学院地球环境研究所, 中国科学院黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国; 3.中国科学院南京地理与湖泊研究所, 南京, 江苏 210008, 中国; 4.中国科学院青海盐湖研究所释光实验室, 西宁, 青海 810008, 中国
推荐引用方式 GB/T 7714	何忠,黄春长,周杰,等. 淮河上游全新世黄土及其沉积动力系统研究[J]. 陕西师范大学,2010,30(4):816-823.
APA	何忠.,黄春长.,周杰.,庞奖励.,李新艳.,...&隆浩.(2010).淮河上游全新世黄土及其沉积动力系统研究.中国沙漠,30(4),816-823.
MLA	何忠,et al."淮河上游全新世黄土及其沉积动力系统研究".中国沙漠 30.4(2010):816-823.