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Traces of the Tunguska Event (1908) in Sediments of Zapovednoe Lake Based on SR–XRF Data / A. V. Darin, D. Y. Rogozin, A. V. Meydus [et al.] // Dokl. Earth Sci. - 2020. - Vol. 492, Is. 2. - P442-445, DOI 10.1134/S1028334X20060045 . - ISSN 1028-334X
Кл.слова (ненормированные):
lake sediments -- microelements -- synchrotron radiation (SR) -- Tunguska event 1908 -- X-ray fluorescent analysis (XRF) -- Catchments -- Chemical elements -- Fluorescence spectroscopy -- Lakes -- Synchrotron radiation -- Bottom sediments -- Extraterrestrial origin -- Micro-particles -- Sediment core -- Synchrotron radiation X-ray fluorescence -- Tunguska -- Water catchment -- Sediments -- chemical element -- explosion -- lacustrine deposit -- radionuclide -- sediment core -- terrigenous deposit -- wildfire -- Russian Federation -- Tunguska
Аннотация: Abstract: An anomalous layer enriched with chemical elements indicating the presence of terrigenous matter was discovered in the sediment core of Zapovednoe Lake located 60 km from the epicenter of the Tunguska event (1908) using synchrotron radiation X-ray fluorescence spectroscopy (SR–XRF). Radioisotope measurements indicate that the age of the layer is consistent with the date of the catastrophe. Apparently, the anomalous layer was formed as a result of an intense terrigenous matter inflow from the water catchment area due to massive forest falls and subsequent wildfires caused by the Tunguska event. Thus, it is established that targeted searches for microparticles of extraterrestrial origin can be carried out in the discovered and dated anomalous bottom sediment layer. © 2020, Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Tungusskii State Nature Reserve, Krasnoyarsk, 648490, Russian Federation
Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Kurchatov Institute National Research Center, Moscow, 123182, Russian Federation

Доп.точки доступа:
Darin, A. V.; Rogozin, D. Y.; Meydus, A. V.; Babich, V. V.; Kalugin, I. A.; Markovich, T. I.; Rakshun, Y. V.; Darin, F. A.; Sorokoletov, D. S.; Gogin, A. A.; Senin, R. A.; Degermendzhi, A. G.

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Geochemical Features of Annual Layers of Bottom Sediments of Freshwater Lakes, Studied via Synchrotron Radiation–Induced XRF Microanalysis / A. V. Darin [et al.] // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 11. - P1437-1440, DOI 10.3103/S106287381911008X . - ISSN 1062-8738
Кл.слова (ненормированные):
Catchments -- Geochemistry -- Lakes -- Lithology -- Microanalysis -- Synchrotron radiation -- Synchrotrons -- Bottom sediments -- Extraterrestrial origin -- Fresh water lakes -- Geochemical features -- Geochemical indicators -- Lake sediments -- Layer boundaries -- Micro-particles -- Sediments
Аннотация: Abstract: The possibility of distinguishing layer boundaries through lithological and geochemical indicators (Rb/Sr ratio) is shown by a case study of bottom sediments from Lake Kucherlinskoe (Altai). Based on the data from scanning synchrotron radiation–induced XRF microanalysis and isotope studies, a record of the Tunguska event of 1908 is found in the bottom sediments of Lake Zapovednoye, forty kilometers from the explosion’s epicenter. An anomalous layer in the sediments is associated with an increase in the terrigenous drift in the catchment area due to massive forest outfall and subsequent fires. The possibility of a targeted search for microparticles of extraterrestrial origin in lake sediments is demonstrated. © 2019, Allerton Press, Inc.

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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Institute of Biophysics, Krasnoyarsk Science Center, Siberian Branch, of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Tungusky State Nature Reserve, Vanavara, 648490, Russian Federation
Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Science, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Darin, A. V.; Babich, V. V.; Kalugin, I. A.; Markovich, T. I.; Rogozin, D. Y.; Meidus, A. V.; Darin, F. A.; Rakshun, Y. V.; Sorokoletov, D. S.

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