ПЕТРОМАГНЕТИЗМ І ПАЛЕОМАГНЕТИЗМ СУБАЕРАЛЬНИХ ВІДКЛАДІВ РОЗРІЗІВ БОЯНИЧІ І КОРШІВ (ВОЛИНСЬКА ВИСОЧИНА)

Д.  Главацький; В. Бахмутов; А. Богуцький; П. Волошин

doi:10.17721/1728-2713.72.06

Authors

D. Hlavatskyi Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine 32 Palladina Ave., Kyiv, 03680 Ukraine
V. Bakhmutov Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine 32 Palladina Ave., Kyiv, 03680 Ukraine
A. Bogucki Ivan Franko National University of Lviv 41 P. Doroshenka Str., Lviv, 79000 Ukraine
P. Voloshyn Ivan Franko National University of Lviv 41 P. Doroshenka Str., Lviv, 79000 Ukraine

DOI:

https://doi.org/10.17721/1728-2713.72.06

Keywords:

Boyanychi section, Korshiv section, Matuyama-Brunhes boundary, palaeomagnetic method, Pleistocene, loess-soil sequence

Abstract

A petromagnetic and palaeomagnetic research of Boyanychi and Korshiv loess-paleosoil sequences (Volhynian Upland) were carried out. The distributions of magnetic parameters along lithostratigraphy column (natural remanent magnetization, magnetic susceptibility, anisotropy of magnetic susceptibility parameters) are presented. Variations of magnetic parameters do not correlate with lithology and cannot be attributed to the "alaskian" or the "chinese" type of subaerial deposits. The rocks are characterized by high stability to alternating magnetic field demagnetization and temperature demagnetization due to the presence of highly coercive magnetic mineral (probably hematite). Both loess and soils have mainly primary sedimentary magnetic texture. The characteristic component of magnetization has only normal polarity and no samples with reverse polarity. In the bottom of the sections the Matuyama-Brunhes boundary was not recognized, that prove the formation of deposits occurred during normal polarity Brunhes zone no later than 780 kyr.

References

Bakhmutov, V., Hlavatskyi, D. (2014). New data about MatuyamaBrunhes boundary in Roxolany section [Novye dannye po granitse Matuyama-Bryunes v razreze Roksolany]. Heolohichnyi zhurnal – Geological journal, 2 (347), 73-84. [In Russian].

Bakhmutov, V. (2007). Pleistocene magnetostratigraphy: a modern status, problems and long-term researches [Magnitostratigrafiya pleysotsena: sovremennoe sostoyanie, problem I perspektivy issledovaniy]. Proceedings from Problemy serednyopleystotsenovoho interhlyatsialu [Problems of Middle Pleisocene Interglacial]: Materialy XIV ukrayinskopolskoho seminaru – XIV Ukrainian-Polish conference. (pp. 96-108). Lviv. [In Russian].

Bogucki, A., Holub, B., Łanczont, M. (2007). Volynian Upland: the main features of geologic structure and relief [Volynska vysochyna: holovni rysy heolohichnoyi budovy ta relyefu]. Proceedings from Problemy serednyopleystotsenovoho interhlyatsialu [Problems of Middle Pleisocene Interglacial]: Materialy XIV ukrayinsko-polskoho seminaru – XIV UkrainianPolish conference. (pp. 6-10). Lviv. [In Ukrainian].

Akram, H., Yoshida, M., Ahmad M. (1998). Rock magnetic properties of the late Pleistocene Loess-Paleosol deposits in Haro River area, Attock basin, Pakistan: Is magnetic susceptibility a proxy measure of paleoclimate? Earth Planets Space, 50, 129-139.

Bidegain, J., Evans, M., Velzen, J. (2005). A magneto–climatological investigation of Pampean Loess, Argentina. Geophysical Journal International, 160, 55-62.

Chlachula, J., Evans, M., Rutter, N. (1998). A magnetic investigation of a Late Quaternary loess/palaesol record in Siberia. Geophys. J. Int., 132, 128-132.

Chlachula, J., Rutter, N., Evans, M. (1997). A late Quaternary loesspaleosol record at Kurtak, southern Siberia. Can. J. Earth Sci., 34, 679-686.

Forster, T., Heller, F. (1994). Paleomagnetism of loess deposits from the Tajik depression (central Asia). Earth Planet. Sci. Lett., 128, 501-512.

Hayward, R. & Lowell, Th. (1993). Variations in loess accumulation rates in the mid-continent, United States, as reflected by magnetic susceptibility. Geology, 21, 821-824.

Liu, Q., Jin, C., Hu, P., Jiang, Z., Ge, K., Roberts, A. (2015). Magnetostratigraphy of Chinese loess–paleosol sequences. Earth-Science Reviews, 150, 139-167.

Matasova, G., Kazansky, A. (2004). Magnetic properties and magnetic fabrics of Pleistocene loess/palaeosol deposits along west-central Siberian transect and their palaeoclimatic implications. Magnetic Fabric: Methods and Applications. Geological Society, 238, 145-173.

Nawrocki, J., Bogucki, A., Wojcik, A. (1996). The magnetic susceptibility record in the Polish and western Ukrainian loess-palaeosol sequences conditioned by palaeoclimate. Boreas, 25, 161-169.

Ding, Z.L., Derbyshire, E., Yang, S.L., Yu, Z.W., Xiong, S.F., Liu, T. S. (2002). Stacked 2.6-Ma grain size record from the Chinese loess based on five sections and correlation with the deep sea δ18O record. Paleoceanography, 17 (3), 5-1–5-21. DOI:10.1029/2001PA000725.

Tarling, D.H., Hrouda, E. (1993). The magnetic anisotropy of rocks. London: Publ. by Chapmen and Hall., 217 p.

Nawrocki, J., Bogucki, A., Łanczont, M., Nowaczyk, N. (2002). The Matuyama-Brunhes boundary and the nature of magnetic remanence aquisition in the loess-paleosol sequences from the western part of the East European Loess province. Palaeogeography, Palaeoclimatology, Palaeoecology, 188, 39-50.

Nawrocki, J., Bakhmutov, V., Bogucki, A., Dolecki, L. (1999). The Paleo- and petromagnetic record in the Polish and Ukrainian loess-paleosol sequences. Phys. Chem. Earth (A), 24, 773-777.

Vlag, P., Oches, E., Banerjee, S., Solheid, P. (1999). The paleoenvironmental-magnetic record of the Gold Hill Steps loess section in central Alaska. Phys. Chem. Earth, A, 24, 779–783.