THE ELBRUS CALDERA IN THE NORTHERN CAUCASUS: GEOLOGICAL STRUCTURE AND TIME OF FORMATION

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dc.contributor.author Gurbanov A.G.
dc.contributor.author Bogatikov O.A.
dc.contributor.author Melekestsev I.V.
dc.contributor.author Lipman P.W.
dc.contributor.author Lowenstern J.B.
dc.contributor.author Miller D.R.
dc.contributor.author Dokuchaev A.Ya.
dc.date.accessioned 2022-07-08T03:37:07Z
dc.date.available 2022-07-08T03:37:07Z
dc.date.issued 2004
dc.identifier https://www.elibrary.ru/item.asp?id=21531067
dc.identifier.citation Russian Journal of Earth Sciences, 2004, 6, 4, TJE04161
dc.identifier.issn 1681-1208
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/37973
dc.description.abstract Complex field work in combination with the detailed interpretation of aerial and satellite photographs allowed us to discovered for the first time a large collapsed Elbrus Caldera (17×14 km along the edge of outer escarpment with a total area of ~230 km2).The Elbrus Volcano is located in its southern part. The mass ejecta of rhyodacitic and rhyolitic pyroclastics and the formation of the tuff and ignimbrite coves are related to the caldera formation. Time of the caldera origin, according U-Pb (SHRIMP) dating on zircon from fiamme of ignimbrites is between 689±30–722±15 Ka. Based on comprehensive investigation of the rocks of the Elbrus volcanic center, including K-Ar, 39Ar/40Ar and EPR dating of rock-forming quartz, we identified in its evolution precaldera, caldera and
dc.description.abstract postcaldera cycles. Two last cycles were subdivided into early and late stages.
dc.subject ELBRUS CALDERA
dc.subject GEOLOGICAL STRUCTURE
dc.subject TIME OF FORMATION
dc.title THE ELBRUS CALDERA IN THE NORTHERN CAUCASUS: GEOLOGICAL STRUCTURE AND TIME OF FORMATION
dc.type Статья


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