干旱区生态环境知识资源中心(Arid): 风成三趾马红土与第四纪黄土的粘土矿物组成异同及其环境意义

Arid

	风成三趾马红土与第四纪黄土的粘土矿物组成异同及其环境意义
其他题名	CLAY MINERAL COMPOSITION OF THE TERTIARY RED CLAY AND THE QUATERNARY LOESS-PALEOSOLS AS WELL AS ITS ENVIRONMENTAL IMPLICATION
	彭淑贞; 郭正堂
ISSN	1001-7410
出版年	2007
卷号	27 期号:2 页码:277-285
中文摘要	文章基于X射线衍射、热分析和理化分析，对西峰三趾马红土的粘土矿物组成进行较系统研究，并与上覆第四纪黄土和古土壤样品进行对比。结果表明，二者的粘土矿物类型相似，以伊利石为主，其次是绿泥石、蒙脱石和高岭石；但伊利石结晶度明显低于第四纪黄土，而与发育较好的第四纪古土壤（如S4和S5）相当；三趾马红土中的粘土矿物组成主要为碎屑成因，成壤作用只对伊利石结晶度有明显影响。根据现代土壤粘土矿物地带性分布规律，三趾马红土的粘土矿物组合指示了大约6Ma以来，我国北方黄土高原地区一直处于温带半湿润-半干润的环境条件下，以后的气候主要在此范围内波动。但伊利石结晶度的变化指示了晚中新世一上新世总体比第四纪较高的风化成壤强度，体现了较强的夏季风效应。
英文摘要	The Tertiary Red Clay in northern China is wind-blown origin, covering the period from ca. 5 - 8 to ca. 2.6Ma. In this study, we examine the clay mineral composition of the Red Clay and Quaternary loess-soils from the Zhaojiachuan section at Xifeng by using X-ray diffraction （XRD）, Differential thermal analysis （DTA）, Thermogravimetric Analysis （TG） and Phy-Chemical analysis. The results show that the clay minerals are dominated by illite, chlorite, smectite and kaolinite, an assemblage similar to the overlying Quaternary loess- paleosols. The concentrations of the major clay minerals calculated by comparing major peak areas, were estimated as follows： illite （53% - 65% ）, smectite （9% - 20% ）, chlorite （ 12% - 20% ）, kaolinite （8% - 13% ）. According to the spatial distributions of clay minerals in modern soil, the clay mineral assemblages indicate that it has been a semi-arid to semi-humid environment in the Chinese Loess Plateau since 6Ma. The high similarity of clay mineral assemblages between the Red Clay and Quaternary loess-soils also provides evidence for the wind- blown origin.In Quaternary loess deposits, although clay minerals mainly derived from source areas, the illite crystallinity of 1.0nm peak in Quaternary interglacial paleosol units is lower than in loess layers, indicating the post-depositional pedogenesis is the main cause for the change of the illite crystal structure, and may be a good proxy for the summer monsoon evolution. The illite crystallinity is lower in the Red Clay than in the Quaternary loess, but being similar with the well-developed paleosols （such as S_4 and S_5 ） , implying that the summer monsoon intensity is stronger in the Late Miocene-Pliocene than in the Quaternary.
中文关键词	粘土矿物 ; 三趾马红土 ; 第四纪黄土-古土壤 ; 季风 ; 风尘堆积
英文关键词	clay mineral Red Clay Quaternary loess-paleosols monsoon eolian deposits
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:2865627
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220824
作者单位	中国科学院地质与地球物理研究所, 北京 100029, 中国
推荐引用方式 GB/T 7714	彭淑贞,郭正堂. 风成三趾马红土与第四纪黄土的粘土矿物组成异同及其环境意义[J],2007,27(2):277-285.
APA	彭淑贞,&郭正堂.(2007).风成三趾马红土与第四纪黄土的粘土矿物组成异同及其环境意义.,27(2),277-285.
MLA	彭淑贞,et al."风成三趾马红土与第四纪黄土的粘土矿物组成异同及其环境意义".27.2(2007):277-285.

条目包含的文件
条目无相关文件。

个性服务

谷歌学术

百度学术

必应学术

相关权益政策

收藏/分享