Research output: Contribution to journal › Article › peer-review
New Data on Late Quaternary Sedimentation in High-Mountain Khikushka Lake (Eastern Sayan): The Role of Climatic and Volcanic Factors. / Solotchin, P. A.; Kuzmin, M. I.; Solotchina, E. P. et al.
In: Doklady Earth Sciences, Vol. 501, No. 1, 7, 11.2021, p. 938-944.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - New Data on Late Quaternary Sedimentation in High-Mountain Khikushka Lake (Eastern Sayan): The Role of Climatic and Volcanic Factors
AU - Solotchin, P. A.
AU - Kuzmin, M. I.
AU - Solotchina, E. P.
AU - Bezrukova, E. V.
AU - Strakhovenko, V. D.
AU - Shchetnikov, A. A.
AU - Zhdanova, A. N.
N1 - Funding Information: This work was carried out on state assignment of the Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences (Novosibirsk), and the Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Science (Irkutsk). This work was supported by the Russian Foundation for Basic Research (project nos. 19-05-00219, 19-05-00328, and 20-05-00247), by a joint grant from the Russian Foundation for Basic Research and the London Royal Society (project no. 21-55-10001), and by grants from the Russian Science Foundation (project nos. 19-17-00099 and 19-17-00216). Publisher Copyright: © 2021, Pleiades Publishing, Ltd.
PY - 2021/11
Y1 - 2021/11
N2 - We present the results of a comprehensive study of Late Pleistocene–Holocene sediments from Khikushka Lake located in the high-mountain Zhom-Bolok volcanic area (East Sayan Mountains). The lake is freshwater, endorheic, and of glacial origin; the age of sediments is ~13.8 ka. The sediments have been studied by X-ray diffractometry (XRD), IR spectroscopy, laser grain-size analysis, scanning electron microscopy, X-ray fluorescence analysis, and AMS dating. Detailed mineralogical studies of the Khikushka Lake sediments have been conducted for the first time. It is shown that feldspars, quartz, phyllosilicates, and amphibole prevail in them. Mathematical modeling of complex XRD patterns allowed us to identify chlorite, illite, illite–smectite, chlorite–smectite, muscovite, vermiculite, and kaolinite among layered silicates. The quantitative ratios of these minerals change significantly from the Pleistocene to the Holocene. Despite the close proximity of the volcanoes and multistage Late Quaternary eruptions in the Zhom-Bolok area, only indirect indications of the presence of pyroclastic material were found in the lacustrine sediments studied. Based on the mineralogical, crystallochemical, lithological, and geochemical studies, five evolutionary stages of the Khikushka Lake basin have been identified. Sedimentation in this basin occurred under the influence of both climatic (glacier activity, lake level fluctuations, lake bioproductivity) and geological (composition of rocks within the catchment, Late Quaternary volcanism) factors.
AB - We present the results of a comprehensive study of Late Pleistocene–Holocene sediments from Khikushka Lake located in the high-mountain Zhom-Bolok volcanic area (East Sayan Mountains). The lake is freshwater, endorheic, and of glacial origin; the age of sediments is ~13.8 ka. The sediments have been studied by X-ray diffractometry (XRD), IR spectroscopy, laser grain-size analysis, scanning electron microscopy, X-ray fluorescence analysis, and AMS dating. Detailed mineralogical studies of the Khikushka Lake sediments have been conducted for the first time. It is shown that feldspars, quartz, phyllosilicates, and amphibole prevail in them. Mathematical modeling of complex XRD patterns allowed us to identify chlorite, illite, illite–smectite, chlorite–smectite, muscovite, vermiculite, and kaolinite among layered silicates. The quantitative ratios of these minerals change significantly from the Pleistocene to the Holocene. Despite the close proximity of the volcanoes and multistage Late Quaternary eruptions in the Zhom-Bolok area, only indirect indications of the presence of pyroclastic material were found in the lacustrine sediments studied. Based on the mineralogical, crystallochemical, lithological, and geochemical studies, five evolutionary stages of the Khikushka Lake basin have been identified. Sedimentation in this basin occurred under the influence of both climatic (glacier activity, lake level fluctuations, lake bioproductivity) and geological (composition of rocks within the catchment, Late Quaternary volcanism) factors.
KW - clay minerals
KW - Eastern Sayan
KW - Holocene
KW - lacustrine sediments
KW - Late Pleistocene
KW - modeling of XRD patterns
KW - paleoclimate
KW - volcanic activity
UR - http://www.scopus.com/inward/record.url?scp=85121749459&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=47546059
UR - https://www.mendeley.com/catalogue/8038edf4-5b37-3396-87f5-6ccb983bf821/
U2 - 10.1134/S1028334X21110155
DO - 10.1134/S1028334X21110155
M3 - Article
AN - SCOPUS:85121749459
VL - 501
SP - 938
EP - 944
JO - Doklady Earth Sciences
JF - Doklady Earth Sciences
SN - 1028-334X
IS - 1
M1 - 7
ER -
ID: 35259023