Premium
A palaeomagnetic and mineral magnetic study of the loess sequence at Liujiapo, Xian, China
Author(s) -
Thistlewood Laurence,
Jianzhong Sun
Publication year - 1991
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/jqs.3390060104
Subject(s) - loess , geology , lithology , remanence , magnetostratigraphy , saturation (graph theory) , geochemistry , sequence (biology) , sediment , china , paleomagnetism , mineralogy , geomorphology , paleontology , magnetization , archaeology , magnetic field , geography , physics , mathematics , quantum mechanics , combinatorics , biology , genetics
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 Journal of Quaternary Science 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.