MAGNETIC STUDY OF LATE PLEISTOCENE LOESS/PALAEOSOL SECTIONS FROM SIBERIA: PALAEOENVIRONMENTAL IMPLICATIONS

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dc.contributor.author Matasova G.
dc.contributor.author Zykina V.
dc.contributor.author Petrovský E.
dc.contributor.author Jordanova N.
dc.contributor.author Kapička A.
dc.date.accessioned 2021-02-26T12:25:35Z
dc.date.available 2021-02-26T12:25:35Z
dc.date.issued 2001
dc.identifier https://elibrary.ru/item.asp?id=13387590
dc.identifier.citation Geophysical Journal International, 2001, 147, 2, 367-380
dc.identifier.issn 0956-540X
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/25749
dc.description.abstract Rock-magnetic properties, including anisotropy of magnetic susceptibility, were investigated in detail for two loess/palaeosol sections in south-western Siberia (Bachat and Kurtak). The results obtained agree with the `Alaskan' type of susceptibility variations for the Kurtak section, showing maximum susceptibility values in loess horizons and minima in palaeosols. For the Bachat section the palaeoenvironmental record, expressed through susceptibility, is not clear, in spite of the geographical proximity of the two sections. Instead, frequency-dependent magnetic susceptibility (FD%) discriminates well between loess and palaeosol units, showing maxima in pedocomplexes and minima in loess units. This suggests certain pedogenic formation of fine ferrimagnetic grains in soils. Studies of anisotropy of magnetic susceptibility (AMS) reveal a well-defined sedimentary magnetic fabric for both sections. Different origins of loess deposition, pure aeolian at Bachat and aeolian affected by secondary processes at Kurtak are reflected in the AMS patterns. The two sections also show different high-temperature behaviour of magnetic susceptibility. While for the Bachat section only one type of thermomagnetic curve was found, the Kurtak section shows different behaviour for loess and palaeosol units. Magnetic properties of samples from the two sections are discussed in terms of palaeoclimatic and depositional conditions.
dc.subject Pleistocene
dc.subject Rock-magnetic properties
dc.subject loess/palaeosol
dc.subject Bachat and Kurtak
dc.subject Siberia
dc.title MAGNETIC STUDY OF LATE PLEISTOCENE LOESS/PALAEOSOL SECTIONS FROM SIBERIA: PALAEOENVIRONMENTAL IMPLICATIONS
dc.type Статья
dc.subject.age Cenozoic::Quaternary::Pleistocene en
dc.subject.age Кайнозой::Четвертичная::Плейстоцен ru


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