A PALEOMAGNETIC AND MINERAL MAGNETIC STUDY OF THE LOESS SEQUENCE AT LIUJIAPO, XIAN, CHINA

被引：38
|
作者：
THISTLEWOOD, L
SUN, JZ
机构：
[1] Department of Archaeology, University of Durham, Durham, DH1 3LE, Woodside Building, South Road
[2] Xian College of Geology, Xian
来源：
JOURNAL OF QUATERNARY SCIENCE | 1991年 / 6卷 / 01期
关键词：
CHINA; LOESS PALEOMAGNETISM; MINERAL MAGNETISM; MAGNETIC FABRIC;
D O I：
10.1002/jqs.3390060104
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
Employing an average vertical sampling interval of 20 cm, oriented samples were collected from 26 m of the loess section at Liujiapo, near Xian, China in order to refine the existing magnetostratigraphic record. Palaeomagnetic results reveal two short reversed-polarity subzones within a profile of predominantly normally magnetised sediments, an interpretation that is at variance with previous results from this section and from other studies of Chinese loess. Investigation of sediment mineral-magnetic properties indicates a close correspondence between down-section variations in intensity of magnetisation, susceptibility and saturation isothermal remanence (SIRM), and lithology. The ratios IRM-100mT/SIRM and SIRM/ susceptibility appear to be particularly sensitive indicators of the degree of soil development and hence of palaeoclimate.
引用
收藏
页码：13 / 26
页数：14
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