Big lost geomagnetic excursion recorded in the loess-paleosol sequence in the southern part of European Russia, Otkaznoe section

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

The paper presents the results of detailed rock magnetic and paleomagnetic studies of the Lower Pleistocene loess-paleosol sequence (LPS) in the Otkaznoe section (Terek-Kuma Lowland). For the first time, the Early Brunhes geomagnetic excursion was recorded in the Otkaznoe section for loess sections of the southern part of European Russia and its continuous paleomagnetic record was obtained. The revealed excursion, covering a zone with a thickness of 0.22 m, is characterized by anomalous/intermediate directions and the latitude of the virtual geomagnetic pole (VGP) ~30° and correlates with the marine isotope stage (MIS) 14. The age of the geomagnetic event, determined based on the correlation of variations in magnetic susceptibility with the global isotope-oxygen curve (δ18O), is ~540 ka, and its duration is estimated at 2–3 ka. The data obtained make it possible to identify the excursion in the Otkaznoe section as the Big Lost geomagnetic event and use it as a reliable chronostratigraphic marker for regional and global correlations.

About the authors

V. I. Dudanova

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences

Email: varyanich1212@gmail.com
Moscow, Russia

E. A. Konstantinov

Institute of Geography, Russian Academy of Sciences

Moscow, Russia

A. M. Pasenko

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences

Moscow, Russia

N. V. Sychev

Institute of Geography, Russian Academy of Sciences

Moscow, Russia

R. V. Veselovskiy

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences; Lomonosov Moscow State University, Geological faculty

Moscow, Russia; Moscow, Russia

References

  1. Ударцев В.П., Болиховская Н.С., Вирина Е.И. Опорные разрезы, хроностратиграфия и палеогеография лёссовых толщ Предкавказской лёссовой области // Инженерная геология лёссовых пород / Тез. докл. Всесоюз. сов. Кн. 1989. Т. 2. С. 102–103.
  2. Болиховская Н.С. Эволюция лёссово-почвенной формации Северной Евразии. М.: Изд-во МГУ, 1995. 270 с.
  3. Фаустов С.С., Вирина Е.И. О стратиграфическом положении границы Матуяма-Брюнес в лёссовой формации Русской равнины // Бюллетень комиссии по изучению четвертичного периода. 2001. № 64. С. 22–31.
  4. Сычев Н.В., Константинов Е.А., Захаров А.Л., Frechen M., Tsukamoto S. Новые данные по геохронологии верхнечетвертичных лёссово-почвенных серий Терско-Кумской низменности // Литология и полезные ископаемые. 2022. № 4. С. 386–398.
  5. Bolikhovskaya N.S., Faustov S.S., Markova A.K. Pleistocene climatic stratigraphy and environments of the Terek-Kuma Lowland (NW Caspian Sea region) inferred from palynological, paleomagnetic and rodent records of the long Otkaznoye sediment sequence // Quaternary International. 2016. V. 409 (A). P. 16–32.
  6. Храмов А.Н., Гончаров Г.И., Комиссарова Р.А., Писаревский С.А., Погарская И.А., Ржевский Ю.С., Родионов В.П., Слауцитайс И.П. Палеомагнитология. Л.: Недра, 1982. 312 с.
  7. Tauxe L. Essentials of Paleomagnetism. Geological Magazine. Berkeley: University of California Press, 2010. V. 147 (6). 489 p.
  8. Kruiver P.P., Dekkers M.J., Heslop D. Quantification of magnetic coercivity components by the analysis of acquisition curves of isothermal remanent magnetisation // Earth and Planetary Science Letters. 2001. V. 189 (3–4). P. 269–276.
  9. Maher B.A. The magnetic properties of Quaternary aeolian dusts and sediments, and their palaeoclimatic significance // Aeolian Research. 2011. V. 3. P. 87‒144.
  10. McElhinny M. W., McFadden Ph.L. Palaeosecular variation over the past 5 Myr based on a new generalized database // Geophysical Journal International. 1997. V. 131 (2). P. 240–252.
  11. Zhu R., Liu Q., Pan Yo., Deng Ch., Sun J. Identifying the origin of the magnetic directional anomalies recorded in the Datong loeaa profile, northeastern Chinese loess plateau // Geophysical Journal International. 2006. V. 164. P. 312–318.
  12. Lisiecki L.E., Raymo M.E. A Plio-Pleistocene stack of 57 globally distributed bentic δ18O records // Paleoceanography. 2005. V. 20 (1). PA1003.
  13. Региональная стратиграфическая схема квартера центра Восточно-Европейской платформы: объяснительная записка / Ред. А.С. Застрожнов. М., 2016. 73 с.
  14. Zastrozhnov A., Danukalova G., Shick S., Kolfshoten Th. State of stratigraphic knowledge of Quaternary deposits in European Russia: Unresolved issues and challenges for further research // Quaternary International. 2018. V. 478. P. 4–26.
  15. Alekseev A.O., Alekseeva T.V. Mineralogy and magnetic properties of the loess-soil formation as the reflection of the landscape and climatic conditions in the Terek-Kuma Lowland in Pleistocene // Paleopedology. 2024. V. 57 (1). P. 63–73.
  16. Channell J.E.T. Mid-Brunhes magnetic excursions in marine isotope stages 9, 13, 14 and 15 (286, 495, 540, and 590 ka) at North Atlantic IODP Sites U1302/3, U1305, and U1306 // Geochem. Geophys. Geosyst. 2017. V. 18. P. 473–487.
  17. Langereis C.G., Dekkers M.J., Lange G.J., Paterne M., Santvoort P.J.M. Magnetostratigraphy and astronomical calibration of the last 1.1 Myr from an eastern Mediterranean piston core and dating of short events in the Brunhes // Geophysical Journal International. 1997. V. 129. P. 75–94.
  18. Channell J.E. T., Singer B.S., Jicha B.R. Timing of Quaternary geomagnetic reversals and excursions in volcanic and sedimentary archives // Quaternary Science Reviews. 2020. V. 228. P. 106114.
  19. Champion D.E., Lanphere M.A., Kuntz M.A. Evidence for a new geomagnetic reversal from lava flows in Idaho: discussion of short polarity reversals in the Brunhes and late Matuyama polarity chrons // Journal of Geophysical Research. 1988. V. 93. P. 11667–11680.
  20. Lanphere M.A., Champion D.E., Christiansen R.L., Izett G.A., Obradovich J.D. Revised ages for tuffs of the Yellowstone Plateau volcanic field: assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event // Geological Society of America Bulletin. 2002. V. 114. P. 559–568.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c) 2025 Russian Academy of Sciences