[1]顾静,周杰,黄河清,等.泾阳泾河段全新世剖面元素地球化学特征与洪水变化[J].山地学报,2013,(02):184.
　GU Jing,ZHOU Jie,HUANG Heqing,et al.Element Geochemical Characteristics and the Flood Changes at the Holocene Profiles in Jinghe Valley of Jingyang[J].Mountain Research,2013,(02):184.
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泾阳泾河段全新世剖面元素地球化学特征与洪水变化()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年02期
页码:
184
栏目:
山地环境
出版日期:
2013-01-01

文章信息/Info

Title:
Element Geochemical Characteristics and the Flood Changes at the Holocene Profiles in Jinghe Valley of Jingyang
作者:
顾静;周杰;黄河清;赵景波;
1. 中国科学院地理科学与资源研究所，北京 100101；
2. 中国科学院水利部水土保持研究所，陕西 杨凌 712100；
3. 陕西师范大学旅游与环境学院，陕西 西安 710062
Author(s):
GU Jing; ZHOU Jie; HUANG Heqing; ZHAO Jingbo(193)
1. Institute of Geographic Sciences and Natural Resources，CAS，Beijing 100101，China；
2. Institute of Water and Soil Conservation，Chinese Academy of Sciences and Uinistry of Water Resources，Yangling 712100，China； 3. College of Tourism and Environment Science，Shannxi Normal University，Xi’an 710062，China
关键词:
一级阶地前缘沉积; 洪水规模; 洪水成因; 洪水变化; 泾河泾阳
Keywords:
the first terrace front palaeoflood sediment; flood scale; flood causes; flood variation; Jingyang reach at Jing River
分类号:
X142
文献标志码:
A
摘要:
根据泾阳泾河一级阶地前缘沉积剖面(JYc)中285个样品的元素、化合物含量和粒度分析,对泾阳泾河段全新世剖面元素地球化学特征与洪水变化进行研究,结果表明,元素Mn、Ni、Cu、Zn、Ga、Pb、Sc、Ti、Nb、Th、U、Rb、V、Ba、Co和化合物Al2O3、Fe2O3、K2O含量在剖面各层中变化明显,分辨率高,能够清晰地指示洪水以及降水量的变化;JYc剖面分为41个沉积层,指示了41次大小不同的洪水和41个降水较多的年份;沉积物粒度细,元素Mn、Ni、Cu、Zn、Ga、Pb、Sc、Ti、Nb、Th、U、Rb、V和化合物Al2O3、Fe2O3、K2O含量高,元素Ba、Co含量低,指示沉积时洪...
Abstract:
Based on the grain size and geochemical element from the 285 samples taken in the front of the first terrace at the Jinghe vally of Jingyang，the relationship between the element geochemical characteristics and the flood changes at the Holocene was studied. The results show that the content of Mn，Ni，Cu，Zn，Ga，Pb，Sc，Ti，Nb，Th，U，Rb，V，Ba，Co，Al2O3，Fe2O3 and K2O change obviously in the profile. Each component changes obviously in the entire profile，which can clearly reflect the variations of flood and precipitation with high resolving power. The profile may be divided into 41 sediment layers，indicating 41 flood events at different scales and 41 years with much precipitation. The finer grain size is，the higher contents of Mn，Ni，Cu，Zn，Ga，Pb，Sc，Ti，Nb，Th，U，Rb，V，Al2O3，Fe2O3 and K2O are and the lower content of Ba，Co are，which indicates small flood intensity，low flood level，and less precipitation in deposition. In contrast，the coarser grain size is，the lower contents of Mn，Ni，Cu，Zn，Ga，Pb，Sc，Ti，Nb，Th，U，Rb，V，Al2O3，Fe2O3 and K2O are and the higher content of Ba，Co are，which indicates high flood intensity，high flood level，and more precipitation at deposition. The floods of Jingyang reach at Jing River represent the floods of Jing River basin in Loess Plateau. Catastrophic floods and big floods came from the whole drainage basin of the Jing River or the large parts of the basin. Moderate floods came from the small parts of the basin. There are three causes to cause flooding in Jing River，i. e drastic increase in annual precipitation，episodic rainstorm without increase in annual precipitation and concentrative and longtime rainfall without increase in annual precipitation. The flood sediments in the section of JYc were supposed to be resulted from the moderate flooding disaster，big flooding disaster and catastrophic disaster.

备注/Memo

备注/Memo:
收稿日期(Received date)：2012-09-25；改回日期(Accepted) :2012-12-30。
基金项目（Foundation item）:国家自然科学基金青年科学
基金项目（41202134）；国家自然科学
基金项目（51179181）；科技部国际科技合作与交流专项（OS2012GR0078）。[Supported by the National Natural Science Foundation of China(41202134，51179181)；Program of International S & T Cooperation of the Ministry of Science and Technology of China.] *
作者简介（Biography）：顾静（1981-），女，博士后，主要从事自然地理与第四纪环境研究。[Gu Jing(1981-)，female，Postdoctor，mainly engaged in the physical geography and Quaternary enviornment.] E-mail：gujing@igsnrr.ac.cn
更新日期/Last Update: 1900-01-01