Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1016/j.rgg.2017.11.005

Ключевые слова: 18O and 13C isotopes, bottom sediments, carbonates, East Siberia, Eravnoe basin, infrared spectroscopy, Lake Dolgoe, Late Holocene, paleoclimate, XRD analysis

Аннотация: Sediments of intracontinental closed lakes are unique natural archives that store climate history records. We study Late Holocene carbonate-bearing sediments of Lake Dolgoe, a small saline lake in the Eravnoe basin on the Vitim Plateau (western Transbaikalia). Sediment samples have been analyzed by several methods: X-ray powder diffraction, infrared spectroscopy, stable isotope (18O and 13C) determination, laser diffraction particle size analysis, XRF elemental analysis, etc. The mineral phases of bottom sediments include clastic and carbonate components and hydromagnesite at the section top; carbonates are authigenic varieties of the calcite-dolomite series. Modeling of complex XRD profiles reveal Mg-calcite with various Mg contents and excess-Ca dolomites, which are mixed-structure crystals compositionally close to stoichiometric dolomite. The crystal structure and relative percentages of carbonates from the dated sedimentary section controlled by climate and lake level changes allow reconstructing the Holocene history of Lake Dolgoe. © 2017

Журнал: Russian Geology and Geophysics

Выпуск журнала: Vol. 58, Is. 11

Номера страниц: 1390-1400

ISSN журнала: 10687971

Издатель: Elsevier B.V.

• Solotchina E.P. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, Russian Federation)
• Sklyarov E.V. (Institute of the Earth's Crust, Siberian Branch of the Russian Academy of Sciences, ul. Lermontova 128, Irkutsk, Russian Federation, Far East Federal University, ul. Sukhanova 8, Vladivostok, Russian Federation)
• Solotchin P.A. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, Russian Federation)
• Zamana L.V. (Institute of Natural Resourses, Environment, and Cryology, Siberian Branch of the Russian Academy of Sciences, ul. Butina 26, Chita, Russian Federation)
• Danilenko I.V. (V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, Russian Federation)
• Sklyarova O.A. (Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, ul. Favorskogo 1a, Irkutsk, Russian Federation)
• Tat'kov P.G. (Geological Institute, Siberian Branch of the Russian Academy of Sciences, ul. Sakhyanovoi 6a, Ulan-Ude, Russian Federation)

• Scopus