摘要
古洪水水文学是环境变迁一个重要研究方向。鉴别古洪水沉积物则是古洪水水文学研究中最基本的任务。本文通过对关中盆地西部地区漆水河流域深入调查,在渭河北侧支流漆水河中游河谷,发现具有典型的古洪水平流沉积夹层的全新世黄土古土壤剖面。利用地貌学和第四纪地质学、沉积学,进而通过磁化率、粒度分析深入揭示了古洪水沉积物与风成黄土堆积物之间的主要区别。
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.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2008年第6期90-94,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(40571154
4047119
40771018)
教育部博士点基金项目(20050718008)
陕西省自然科学基金项目(2006D01)资助
关键词
漆水河
关中盆地
古洪水
平流沉积物
Qishuihe River
Guanzhong Basin
slack - water deposit
