[1]李文慧,胡春生*,田景梅,等.安徽宣城向阳剖面第四纪红土常量元素地球化学特征及其古气候意义[J].山地学报,2020,(03):371-383.[doi:10.16089/j.cnki.1008-2786.000517]
 LI Wenhui,HU Chunsheng*,TIAN Jingmei,et al.Geochemical Characteristics and Paleoclimate Significance of Major Elements of the Quaternary Red Clay in the Xiangyang Section in Xuanchen, Anhui Province,China[J].Mountain Research,2020,(03):371-383.[doi:10.16089/j.cnki.1008-2786.000517]
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安徽宣城向阳剖面第四纪红土常量元素地球化学特征及其古气候意义()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年03期
页码:
371-383
栏目:
山地环境
出版日期:
2020-05-30

文章信息/Info

Title:
Geochemical Characteristics and Paleoclimate Significance of Major Elements of the Quaternary Red Clay in the Xiangyang Section in Xuanchen, Anhui Province,China
文章编号:
1008-2786-(2020)3-371-13
作者:
李文慧12胡春生12*田景梅12曹 乐12
1.安徽师范大学 地理与旅游学院,安徽 芜湖; 2.安徽省江淮流域地表过程与区域响应重点实验室,安徽 芜湖
Author(s):
LI Wenhui12 HU Chunsheng12* TIAN Jingmei12 CAO Le12
1. School of Geography and Tourism, Anhui Normal University, Wuhu 241000, Anhui, China; 2. Anhui Key Laboratory of Earth Surface Processes and Regional Response in Yangtze-Huaihe River Basin, Wuhu 241000, Anhui, China
关键词:
宣城向阳剖面 第四纪红土 常量元素 地球化学风化参数 古气候变化
分类号:
P595
DOI:
10.16089/j.cnki.1008-2786.000517
文献标志码:
A
摘要:
安徽宣城向阳剖面是我国南方第四纪红土标准剖面,蕴含着丰富的古环境与古气候信息,对其进行常量元素地球化学特征及古气候的研究,对深刻理解该区红土风化成壤强度与古气候演化、充实中国南方第四纪红土的高分辨率研究具有一定意义。本文基于野外地质地貌、岩性调查与加密采样,运用ZSX PrimusIV型X射线荧光光谱仪(XRF),对该剖面进行常量元素测定,并采用地球化学风化参数指标CIA与BA、元素迁移率等分析方法,结合前人的年代数据,探讨了该剖面红土风化特征及古气候意义。研究表明:(1)向阳剖面常量元素以Fe2O3、Al2O3、SiO2为主,具有显著的富硅铝铁化特征,约916 ka以来红土堆积处于相对暖湿的古气候背景下,但是气候总体有向干凉方向变化的趋势;(2)约916 ka以来研究区古气候大致存在7次相对暖湿与相对干凉期的旋回变化; 其中,阶段I至阶段II暖湿程度与风化强度较大,气候向暖湿方向发展,阶段III暖湿程度与风化强度均有所降低,阶段IV暖湿程度与风化强度达到最大,是最稳定的时期,阶段V至阶段VII气候一直向干凉方向变化;(3)在6.2 m(约534 ka前)以下部分,红土成土沉积动力强度较大,干湿变化比较强烈,沉积环境不稳定,而此后红土成土沉积动力减弱,沉积环境相对稳定。

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备注/Memo

备注/Memo:
收稿日期(Received date):2019-10-09; 改回日期:2020-05-11
基金项目(Foundation item):安徽省高校优秀青年人才支持计划项目(gxyqZD2018014); 安徽师范大学博士科研启动基金(2018 XJJ43)。[Anhui University Outstanding Young Talents Support Program(gxyqZD2018014): Anhui Normal University Doctoral Research Foundation(2018XJJ43)]
作者简介(Biography):李文慧(1996-),女,安徽安庆人,硕士研究生,主要研究方向:地貌与第四纪环境。[LI Wenhui(1996-), female, born in Anqing, Anhui province, M.Sc. candidate, research on geomorphology and quaternary environment]E-mail: 2560464609@qq. com
*通讯作者(Corresponding author):胡春生(1978-),男,博士,副教授,主要研究方向:河流地貌与第四纪环境变化。[HU Chunsheng(1978-), male, Ph.D., associate professor, research on river geomorphology and quaternary environmental change]E-mail: huchsh03@163. com
更新日期/Last Update: 2020-05-30