2008•Ganhanqu ziyuan yu huanjingRequires access
The Identification of the Palaeoflood Slackwater Sediments in the Holocene Loess Profile in the Guanzhong Basin
Sun Su-mei
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Abstract
Over the past two decades,slackwater sediments analysis has become a widely accepted tool in palaeoflood research.The most important and basic question in palaeoflood study is ascertained the sediments of palaeoflood.This paper reports the identification of the palaeoflood slackwater sediments in the Holocene loess profile in the Guanzhong Basin.Since each flood units in slackwater sediments occur as couplets,so the Bartington susceptibility meter was used to discern the number of couplets as the organic rich deposits cause a magnetic susceptibility variation.Grain size analysis was undertaken to examine the sedimentary characteristics of slackwater seposits.There are abrupt changes in colour,grain size,and sedimentary type between the slackwater deposits and the loess.The clays in the slackwater deposits are much more than loess.