Geochemical Characteristics of the Holocene Flood Slackwater Deposits in the Lower Reaches of the Jinghe River
详细信息
- 责任者：Zhang Yuzhu (College of Tourism and Environmental Sciences ; Shaanxi Normal University ; Xi’an 710062 ; China) ; Huang Chunchang
- 刊名：Acta Sedimentologica Sinica
- 出版年：2012
- 卷期：30(5)
- 关键词：全新世 ; Holocene ; 古洪水 ; paleofloods ; 渭河 ; Weihe River
- 页码：p.900-908
- 图表：4 illus., 43 refs.
- 分类号：1400
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Through widespread field survey along the Jinghe River valley,a Holocene loess-soil profile with interbedded flood slackwater deposits(SWD) was found at the YGZ site at the riverbank near the Yangguanzhai village.The comparative study of the geochemical difference between palaeoflood slackwater deposits and the eolian loess and soil showed that:1) the concentrations of major elements Fe2O3,Al2O3.K2O,MgO are higher in the palaeosol(S0) and lower in the loess (L1,Lt,L0); and 2) in a single palaeoflood slackwater deposit (SWD) bed, the sorted deposition in floodwater resulted in a concentration of the coarse fraction and heavy minerals at the bottom of the SWD bed. Thus,Zr,Hf,Ti,Cr,Y and other trace elements show a prominent peak.
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