УДК 551

AGE-OLD VARIATIONS OF THE GEOMAGNETIC FIELD ISOLATED
IN THE PLIOCENE-QUATERNARY SEDIMENTS OF WESTERN TURKMENISTAN

¹ Geological Institute, Russian Academy of Sciences, Moscow, Russia

² Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

³ People’s Friendship University of Russia (RUDN University), Moscow, Russia

*e-mail: asmikvar@yandex.ru

Abstracts. Akchagyl deposits of Western Turkmenistan were studied in order to identify the spectrum of age-old variations of the geomagnetic field in the Pliocene-Quaternary sediments. The detritus nature of residual magnetization is established. The spectra of geomagnetic field variations in the intervals of Gauss direct polarity (Zau section) and Matuyam reverse polarity (Issu section) in Western Turkmenistan were studied. The spectrum of secular variations of the geomagnetic field is distinguished. In particular, the periods of 8–10, 25–30 and 45–50 thousand years. The selected periods are stable throughout the Pleistocene and are in good agreement with the results obtained from the corresponding deposits of Armenia and Azerbaijan. It should be noted that the revealed discrete series often differ for different elements of the field and for different time intervals.

Keywords: Western Turkmenistan, Zau, Issu, wavelet analysis, transgression, akchagyl, Zijderveld curveys, inversion, Mammoth, Kaena, Reunion.

About the authors

TRUBIKHIN Valery Mikhalovich – Geological Institute, Russian Academy of Sciences. Russia, 119017, Moscow, Pyzhevsky lane, 7. E-mail: vmt1940@mail.ru

VARDANYAN Hasmik Ashotovna – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Bolshaya Gruzinskaya st., 10-1. E-mail: asmikvar@yandex.ru

STAKHOVSKAYA Ritta Yurievna – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. E-mail: ritta-st@yandex.ru

GORBATOV Evgenii Sergeevich – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1.

RASSKAZOV Andrew Andreevich – People’s Friendship University of Russia (RUDN University). Russia, 117198, Moscow, Miklukho-Maklaya st., 6. E-mail: rasskazo@yandex.ru

Cite this article as: Trubikhin V.M., Vardanyan H.A., Stakhovskaya R.Yu., Gorbatov E.S., Rasskazov A.A. Age-old variations of the geomagnetic field isolated in the Pliocene-Quaternary sediments of Western Turkmenistan, Geofizicheskie Protsessy i Biosfera (Geophysical Processes and Biosphere), 2020, vol. 19, no. 2, pp. 74–82 (in Russian). https://doi.org/10.21455/gpb2020.2-5

English version: Izvestiya, Atmospheric and Oceanic Physics, 2020, vol. 56, iss. 8. ISSN: 0001-4338 (Print), 1555-628X (Online). https://link.springer.com/journal/volumesAndIssues/11485