Инд. авторы:	Ovchinnikova G.V., Kuznetsov A.B., Gorokhov I.M., Letnikova E.F., Kaurova O.K., Gorokhovskii B.M.
Заглавие:	U-Pb age and Sr-chemostratigraphy of limestone from the Sorna Formation, Azyr-Tal Range, Kuznetsk Alatau
Библ. ссылка:	Ovchinnikova G.V., Kuznetsov A.B., Gorokhov I.M., Letnikova E.F., Kaurova O.K., Gorokhovskii B.M. U-Pb age and Sr-chemostratigraphy of limestone from the Sorna Formation, Azyr-Tal Range, Kuznetsk Alatau // Doklady Earth Sciences. - 2011. - Vol.437. - Iss. 1. - P.331-334. - ISSN 1028-334X. - EISSN 1531-8354.
Внешние системы:	DOI: 10.1134/S1028334X11030184; SCOPUS: 2-s2.0-80051615730;
Реферат:	eng: The U-Pb(Pb-Pb) age was determined for limestone from member III of the Sorna Formation out-cropped on the Azyr-Tal Range, Kuznetsk Alatau. The weighted average value from three calculated values is 523 ± 5 Ma (MSWD = 0.02, 2σ). This age coincides with the Early Cambrian age interval determined with Sr isotopic chemostratigraphy (87Sr/86Sr ratio is 0.70850-0.70852). The low value of μ2 = 238U/ 204Pb for limestone is due to the evolution of diagenetic fluid containing lead from the mantle reservoir into the Sorna sediments. © 2011 Pleiades Publishing, Ltd.
Ключевые слова:	Cambrians; Chemostratigraphy; Diagenetic fluids; Mantle reservoirs; Weighted averages; Anoxic sediments; Limestone; Stratigraphy; Russian Federation; Kuznetsk Alatau; uranium-lead dating; outcrop; mantle structure; limestone; diagenesis; chemostratigraphy; Cambrian; age determination; Calculated values; Lead;
Издано:	2011
Физ. характеристика:	с.331-334