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

页码：13 / 26

页数：14

共 20 条

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