The timing and extent of the eruption of the Siberian Traps large igneous province: Implications for the end-Permian environmental crisis

Reichow M.K.; Pringle M.S.; Al'Mukhamedov A.I.; Allen M.B.; Andreichev V.L.; Buslov M.M.; Davies C.E.; Fedoseev G.S.; Fitton J.G.; Inger S.; Medvedev A.Ya.; Mitchell C.; Puchkov V.N.; Safonova I.Yu; Scott R.A.; Saunders A.D.

doi:10.1016/j.epsl.2008.09.030

Инд. авторы:	Reichow M.K., Pringle M.S., Al'Mukhamedov A.I., Allen M.B., Andreichev V.L., Buslov M.M., Davies C.E., Fedoseev G.S., Fitton J.G., Inger S., Medvedev A.Ya., Mitchell C., Puchkov V.N., Safonova I.Yu, Scott R.A., Saunders A.D.
Заглавие:	The timing and extent of the eruption of the Siberian Traps large igneous province: Implications for the end-Permian environmental crisis
Библ. ссылка:	Reichow M.K., Pringle M.S., Al'Mukhamedov A.I., Allen M.B., Andreichev V.L., Buslov M.M., Davies C.E., Fedoseev G.S., Fitton J.G., Inger S., Medvedev A.Ya., Mitchell C., Puchkov V.N., Safonova I.Yu, Scott R.A., Saunders A.D. The timing and extent of the eruption of the Siberian Traps large igneous province: Implications for the end-Permian environmental crisis // Earth and Planetary Science Letters. - 2009. - Vol.277. - Iss. 1-2. - P.9-20. - ISSN 0012-821X. - EISSN 1385-013X.
Внешние системы:	DOI: 10.1016/j.epsl.2008.09.030; SCOPUS: 2-s2.0-57849167389;
Реферат:	eng: We present new high-precision 40Ar/39Ar ages on feldspar and biotite separates to establish the age, duration and extent of the larger Siberian Traps volcanic province. Samples include basalts and gabbros from Noril'sk, the Lower Tunguska area on the Siberian craton, the Taimyr Peninsula, the Kuznetsk Basin, Vorkuta in the Polar Urals, and from Chelyabinsk in the southern Urals. Most of the ages, except for those from Chelyabinsk, are indistinguishable from those found at Noril'sk. Cessation of activity at Noril'sk is constrained by a 40Ar/39Ar age of 250.3 ± 1.1 Ma for the uppermost Kumginsky Suite. The new 40Ar/39Ar data confirm that the bulk of Siberian volcanism occurred at 250 Ma during a period of less than 2 Ma, extending over an area of up to 5 million km2. The resolution of the data allows us to confidently conclude that the main stage of volcanism either immediately predates, or is synchronous with, the end-Permian mass extinction, further strengthening an association between volcanism and the end-Permian crisis. A sanidine age of 249.25 ± 0.14 Ma from Bed 28 tuff at the global section and stratotype at Meishan, China, allows us to bracket the P-Tr boundary to 0.58 ± 0.21 myr, and enables a direct comparison between the 40Ar/39Ar age of the Traps and the Permo-Triassic boundary section. Younger ages (243 Ma) obtained for basalts from Chelyabinsk indicate that volcanism in at least the southern part of the province continued into the Triassic. © 2008 Elsevier B.V. All rights reserved.
Ключевые слова:	climate change; end-Permian mass extinction; large igneous provinces; Siberian Traps; ⁴⁰Ar/³⁹Ar ages; end-Permian mass extinction; Environmental crises; large igneous provinces; Sanidine; Siberian Traps; Triassic; Tunguska; Argon; Basalt; Climatology; Feldspar; Forestry; Mica; Silicate minerals; Climate change; argon-argon dating; climate change; geochronology; large igneous province; Russian Federation; Norilsk; Krasnoyarsk [Russian Federation]; Eurasia; volcanic eruption; Permian; 40Ar/39Ar ages; mass extinction;
Издано:	2009
Физ. характеристика:	с.9-20