The paleo- and petromagnetic record in the Polish and Ukrainian loess-paleosol sequences

Citation
J. Nawrocki et al., The paleo- and petromagnetic record in the Polish and Ukrainian loess-paleosol sequences, PHYS CH P A, 24(9), 1999, pp. 773-777
Citations number
12
Categorie Soggetti
Earth Sciences
Journal title
PHYSICS AND CHEMISTRY OF THE EARTH PART A-SOLID EARTH AND GEODESY
ISSN journal
14641895 → ACNP
Volume
24
Issue
9
Year of publication
1999
Pages
773 - 777
Database
ISI
SICI code
1464-1895(1999)24:9<773:TPAPRI>2.0.ZU;2-E
Abstract
718 samples from five loess-paleosol sections located in the Black Sea regi on, the western Ukraine and Poland (Lublin Upland) were the subject of pale omagnetic and petromagnetic study. Strong magnetic enhancement is observed in the cambisols, chernozems and iluvial horizons of the forest (podzolic) and leached brown type (brownerde) soils. Distinct magnetic depletion or di lution occurs in the gley soils and the leached horizons of podsols and bro wn type soils. Magnetic enhancement in the section from Black Sea region wa s not simply dependent on paleotemperature. Soils from the interstadial per iods could be magnetically enhanced to the same degree as soils which were formed during interglacials. In the Polish and Ukrainian loess-palesol sequ ences, paleorainfall could be a significant factor controlling the suscepti bility signal in addition to paleotemperature. The degree of warming of pal eoclimate can be expressed by the amount of secondary maghemite that was fo rmed in the studied paleosols. All sections were deposited after the Brunhes/Matuyama paleomagnetic revers al. No remarkable paleomagnetic event was encountered. However, very distin ct directional changes associated most probably with the secular variations were observed in the Polish and western Ukrainian sections. These changes can serve as a stratigraphic correlation tool for comparison with petromagn etic data.