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The Upper Pleistocene loess-palaeosol sequence from the Kolodiiv section (East Carpathian Fore land) has been palaeomagnetically studied. Almost all samples displayed moderate to high positive palaeomagnetic inclinations and declinations en closed between 320° and 40°. How ever, one sample from the fossil soil of the last inter glacial pedocomplex (at 16.6 m pro file depth) was reverse magnetized and there fore can be correlated with the Blake Palaeomagnetic Event. Consequently that palaeosol can be related to (Oxygen Isotope Stage) OIS 5e1. An other sample from the Dubno 1 interstadial palaeosol demonstrated southern declination and significant lowering of inclination (up to 40°). This might be a record of the Laschamp Palaeomagnetic Event or of any Late Pleistocene palaeomagnetic excursion. The magnetic susceptibility and anhysteretic remanent magnetization data reflect the presence of several soils forming during the warm conditions of OIS 5 and the complex nature of the Eemian warming. Two palaeosols that developed between ca.115 ka and 120 ka indicate at least two climatic optima during the Eemian. High values of magnetic susceptibility (up to 300 Ą 10-6 SI units) noted in the middle of the section that contains slump deposits (9.5 m to 11m of depth) suggest that this material was derived from older soils of inter glacial type.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
161--166
Opis fizyczny
bibliogr. 17 poz., wykr.
Twórcy
autor
autor
autor
- Palaeomagnetic Laboratory, Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa, Poland, Jerzy.Nawrocki@pgi.gov.pl
Bibliografia
- DEMEDYUK N. S. and KHRYSTOFOROVA T. F. (1975) -On the first finding of buried peat of the Mikulino period in the Forecarpathian area. Dopovidi AN URSR, seria B, 8: 678-682.
- EVANS M. E., RUTTER N. W., CATTO N., CHLACHULA J. and NYVLT D. (2003) -Magnetoclimatology: Teleconnection between the Siberian loess record and North Atlantic Heinrich events. Geology, 31 (6): 537-540.
- FRECHEN M., VAN VLIET-LANOE B. and VAN DEN HAUTE P. (2001) -The Upper Pleistocene loess record at Harmignies/Belgium -high resolution terrestrial archive of climate forcing. Palaeogeogr., Palaeoclimat., Palaeoecol., 173: 175-195.
- GUILLOU H., SINGER B. S., LAJ C., KISSEL C., SCAILLET S. and JICHA B. R. (2004) -On the age of the Laschamp geomagnetic excursion. Earth Planet. Sc. Lett., 227: 331-343.
- HELLER F. and LIU T. S. (1984) -Magnetism of Chinese loess deposits. Geophys. J. R. astr. Soc., 77: 125-141.
- HELLER F. and EVANS M. E. (1995) -Loess magnetism. Rev. Geoph., 33:211-240.
- HESLOP D., LANGEREIS C. G. and DEKKERS M. J. (2000) -Anew astronomical timescale for the loess deposits of Northern China. Earth Planet. Sc. Lett., 184: 125-139.
- KALINOVYCH N. (2002) -Plant cover in the Carpathians foreland (Ukraine) during the last Interglacial epoch (in Polish with English summary). In: Starsza i środkowa epoka kamienna w Karpatach (ed. J. Gancarski): 9-15. Muzeum Podkarpackie. Krosno.
- KIRSCHVINK J. L. (1980) -The least square line and plane and the analysis of paleomagnetic data. Geoph. J. R. Astron. Soc., 62: 699-718.
- ŁANCZONT M. and BOGUCKYJ A. (2002) -The examined loess sites in the Halyć Prydnistrov'ja region (in Polish with English summary). Stud. Geol. Pol., 119: 33-181.
- MAHER B. and THOMPSON R. (1999) -Palaeomonsoons I: the manetic record of palaeoclimate in the terrestrial loess and palaeosol sequences. In: Ouaternary climates, environments and magnetism (eds. B. Maher and R. Thompson): 81-125. Cambridge Univ. Press.
- NAWROCKI J., WÓJCIK A. and BOGUCKI A. (1996) -The magnetic susceptibility record in the Polish and western Ukrainian loess-palaeosol sequences conditioned by paleoclimate. Boreas, 25: 161-169.
- NAWROCKI J., BAKHMUTOV V BOGUCKI A. and DOLECKI L. (1999) -The paleo- and petromagnetic record in the Polish and Ukrainian loess-paleosol sequences. Phys. Chem. Earth (A) 24: 773-777.
- NAWROCKI J., BOGUCKI A., ŁANCZONT M. and NOWACZYK N. R. (2002) -The Matuyama-Brunhes boundary and the nature of magnetic remanence acquisition in the loess-paleosol sequences from the western part of the East European Loess province. Palaeogeogr., Palaeoclimat., Palaeoecol., 188 (1-2): 39-50.
- NOWACZYK N. R. and FREDERICHS T. W. (1999) -Geomagnetic events and relative palaeointensity variations during the past 300 ka as recorded in Kolbeinsey Ridge sediments, Iceland Sea: indication for a strongly variable geomagnetic field. Int. J. Earth Sc., 88: 116-131.
- PARES J. M., VAN DER VOO R. and YAN M. (2004) -After the dust settles: Why is the Blake Event imperfectly recorded in Chinese loess ? In: Timescales of the Paleomagnetic Field. Geoph. Monograph Ser., 145: 191-2004. American Geophysical Union.
- RLING D. H. (1983) -Palaeomagnetism. ChapmanandHall. London.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS5-0005-0010