渭河宝鸡峡全新世古洪水事件研究-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

资源与环境科学

渭河宝鸡峡全新世古洪水事件研究

万红莲1，2，3，黄春长1*，庞奖励1，查小春1

(1 陕西师范大学旅游与环境学院，陕西西安 710062； 2 宝鸡文理学院地理科学与环境工程系，陕西宝鸡 721013；3 宝鸡文理学院灾害监测与机理模拟陕西省重点实验室，陕西宝鸡 721013)

万红莲,女,讲师，博士研究生,主要从事资源开发和环境变迁等方面的研究和教学工作.* 通讯作者：黄春长，男，教授，博士研究生导师.E-mail：cchuang@snnu.edu.cn.

摘要:

通过对渭河流域的调查, 在渭河上游宝鸡峡谷发现了含有典型古洪水滞流沉积层的全新世黄土古土壤剖面.对该剖面进行磁化率、烧失量、碳酸钙、粒度等指标的分析测定和论证，明确了古洪水滞流沉积物的基本特点，揭示出全新世古洪水事件的沉积学记录.根据这组古洪水沉积层出现的地层位置和磁化率等气候变化指标，通过与渭河流域诸多剖面的对比，并且结合该剖面所含的龙山文化层和西周文化层考古学断代，确定渭河宝鸡峡谷全新世特大洪水事件发生在3 200～3 000 a B.P..

关键词：

渭河；古洪水；滞流沉积；全新世

收稿日期：

2009-09-22

中图分类号：

TV122

文献标识码：

文章编号：

1672-4291(2010)02-0076-07

基金项目：

国家自然科学基金资助项目(40771018); 陕西省教育厅自然科学研究计划资助项目（09JK330）

Doi:

Palaeoflood events in the Baojixia Gorges of the Weihe River

WAN Hong-lian1,2,3, HUANG Chun-chang1*, PANG Jiang-li1, ZHA Xiao-chun1

(1 College of Tourism and Environment, Shaanxi Normal University, Xi′an 710062, Shaanxi, China; 2 Geography and Environmental Department, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China; 3 The Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China)

Abstract:

By field investigation in the upper reaches of the Weihe River, the Holocene loess-soil profile containing the typical palaeoflood slackwater deposit was found in the Baojixia Gorges. Analytical results of magnetic susceptibility, loss-on-ignition, CaCO3 content and grain-size distribution indicated that these palaeoflood deposits are different from the soil and the loess, and consists of fine silt and clay. According to this group of palaeoflood slackwater deposit location and climate change indicators such as magnetic susceptibility, through a number of profile comparison in Weihe River basin, and human remains of the Longshan Culture and the West Zhou dynasty, the palaeoflood events were dated to 3 200～3 000 a B.P..

KeyWords:

Weihe River; palaeoflood; slackwater deposit; Holocene