Institute of Northern Engineering, University of Alaska Fairbanks
Erscheinungsjahr:
2008
Medientyp:
Text
Beschreibung:
Five exposures on two arctic islands in southern Lena Delta, Russia, were investigated in order to determine the development of iron-oxides under different pedogenic conditions in permafrost-affected paleosols and to prove their application for describing environmental conditions during pedogenesis of buried soils and the predominant paleoclimate during their development. The samples were collected from the active layer on Samoylov Island as well as from Late Pleistocene and Holocene paleosols on Kurungnakh Island. The amounts of iron extractable by dithionite (Fed) and by oxalate (Feo) were determined for all samples. The extracts were conducted to determine the forming conditions of paleosols and their iron-oxide contents and to compare them with modern permafrost-affected soils. The iron-oxide amounts characterize well the sedimentation conditions and the paleoclimate of the investigated paleosols. As contributing factors, the organic matter content and the inundation were identified. Additionally, in modern soils, translocation processes within the polygon affect the conditions of the different Fe-fractions.