RAPID ERUPTION OF SIBERIAN FLOOD-VOLCANIC ROCKS AND EVIDENCE FOR COINCIDENCE WITH THE PERMIAN-TRIASSIC BOUNDARY AND MASS EXTINCTION AT 251 MA
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dc.contributor.author | Kamo S.L. | |
dc.contributor.author | Amelin Y. | |
dc.contributor.author | Davis D.W. | |
dc.contributor.author | Czamanske G.K. | |
dc.contributor.author | Fedorenko V.A. | |
dc.contributor.author | Trofimov V.R. | |
dc.date.accessioned | 2021-11-21T03:19:40Z | |
dc.date.available | 2021-11-21T03:19:40Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13430697 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2003, 214, 1-2, 75-91 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32305 | |
dc.description.abstract | The Siberian flood-volcanic event is the most voluminous and explosive, continental, volcanic event known in the Phanerozoic record. U–Pb perovskite and zircon ages were obtained for lavas of the lowermost unit (251.7±0.4 Ma) and near-uppermost unit (251.1±0.3 Ma), respectively, of the volcanic sequence in the Maymecha–Kotuy area, Russia. Along with stratigraphic correlations and paleomagnetic evidence, these ages suggest that rapid extrusion of the entire ∼6500 m thick composite sequence occurred in less than 1 million years. The time of extrusion coincides precisely with an age of 251.4±0.3 Ma previously obtained for the Permian–Triassic mass-extinction event, the most devastating biotic crisis known. Emplacement of the Noril’sk–Talnakh ore-bearing intrusions, notable for their prodigious Cu–Ni–PGE deposits, was synchronous with these two major geologic events at 251.2±0.3 Ma. The Guli volcanic-intrusive complex in the Maymecha–Kotuy area appears to represent the final mafic magmatism of the entire Siberian flood-volcanic event. Baddeleyite from a carbonatite that intrudes the complex gives an age of 250.2±0.3 Ma, and shows possible 231Pa excess. The Bolgokhtokh granodiorite stock has a zircon age of 229.0±0.4 Ma, and represents the youngest known magmatism in the region. | |
dc.subject | Triassic | |
dc.subject | Permian | |
dc.title | RAPID ERUPTION OF SIBERIAN FLOOD-VOLCANIC ROCKS AND EVIDENCE FOR COINCIDENCE WITH THE PERMIAN-TRIASSIC BOUNDARY AND MASS EXTINCTION AT 251 MA | |
dc.type | Статья | |
dc.subject.age | Mesozoic::Triassic | |
dc.subject.age | Мезозой::Триасовая | ru |
dc.subject.age | Палеозой::Пермская | ru |
dc.subject.age | Paleozoic::Permian |
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