Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 47046 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Principal features master curve of geomagnetic field variations in Belorussia during the last 12 thousand years Principal features master curve of geomagnetic field variations in Belorussia during the last 12 thousand years Nourgaliev D K Nourgaliev D K Heller F Heller F Borisov A C Borisov A C Yasonov P G Yasonov P G Chernova I Yu Chernova I Yu Hajdas I Hajdas I Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Institut fur Geophysik, ETH Honggerberg, Zurich, Switzerland ru Institut fur Geophysik, ETH Honggerberg, Zurich, Switzerland ru Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Geological Faculty, Kazan State University, Kazan, Russia ru Institut fur Teilchenphysik, ETH Honggerberg, Zurich, Switzerland ru Institut fur Teilchenphysik, ETH Honggerberg, Zurich, Switzerland ru 7 2 91 106 10 11 2021 https://rjes.ru/en/nauka/article/47046/view

This paper presents the results of the paleomagnetic studies of the Naroch and Svir lake bottom deposits in Belorussia. The objects of study were nine columns of lake-floor sediments, totaling 6.50nbsp;m in thickness, collected using a special-type core sampler which did not disturb the structure of the sample material. The absolute dating of the sediments was performed by a radiocarbon method using the macroremains of the organic matter grass. The columns of the sediments were correlated using their absolute ages, lithologies, and magnetic susceptibility values. All sedimentary rock columns showed a good agreement of the inclination and declination components of the natural remanent magnetization ChRM distinguished in all sedimentary rock columns using alternative magnetic field cleaning. The data obtained for all rock columns were summed up to produce the composite curves of ChRM declination and inclination variation for the sediments of these lakes. These data were compared with the archeomagnetic and limnomagnetic data available for Central and East Europe. All records of the paleosecular geomagnetic variations PSV showed a good agreement in terms of the morphology of the ChRM declination and inclination. At the same time the sediments of the Belorussian lakes showed a systematically older age and the lower magnitudes of the ChRM declination and inclination variations compared to the other PSV records available. These effects can be explained by the presence of some postdeposition remanent magnetization PDRM in the sediments of the Belorussian lakes and by the addition of some "aged'' carbon without 14C to the lake from the surrounding carbonate rocks. The basic features of the geomagnetic field variations in Europe are discussed for the last 10-12 thousand years.

This paper presents the results of the paleomagnetic studies of the Naroch and Svir lake bottom deposits in Belorussia. The objects of study were nine columns of lake-floor sediments, totaling 6.50nbsp;m in thickness, collected using a special-type core sampler which did not disturb the structure of the sample material. The absolute dating of the sediments was performed by a radiocarbon method using the macroremains of the organic matter grass. The columns of the sediments were correlated using their absolute ages, lithologies, and magnetic susceptibility values. All sedimentary rock columns showed a good agreement of the inclination and declination components of the natural remanent magnetization ChRM distinguished in all sedimentary rock columns using alternative magnetic field cleaning. The data obtained for all rock columns were summed up to produce the composite curves of ChRM declination and inclination variation for the sediments of these lakes. These data were compared with the archeomagnetic and limnomagnetic data available for Central and East Europe. All records of the paleosecular geomagnetic variations PSV showed a good agreement in terms of the morphology of the ChRM declination and inclination. At the same time the sediments of the Belorussian lakes showed a systematically older age and the lower magnitudes of the ChRM declination and inclination variations compared to the other PSV records available. These effects can be explained by the presence of some postdeposition remanent magnetization PDRM in the sediments of the Belorussian lakes and by the addition of some "aged'' carbon without 14C to the lake from the surrounding carbonate rocks. The basic features of the geomagnetic field variations in Europe are discussed for the last 10-12 thousand years.

 paleomagnetism modern lake deposits Naroch and Svir lakes Holocene paleosecular geomagnetic variations radiocarbon dating . paleomagnetism modern lake deposits Naroch and Svir lakes Holocene paleosecular geomagnetic variations radiocarbon dating .

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