A PRECISE LATE PERMIAN 40AR/39AR AGE FOR CENTRAL IBERIAN CAMPTONITIC LAMPROPHYRES

Scarrow J.H.; Bea F.; Montero P.; Molina J.F.; Vaughan A.P.M.

dc.contributor.author	Scarrow J.H.
dc.contributor.author	Bea F.
dc.contributor.author	Montero P.
dc.contributor.author	Molina J.F.
dc.contributor.author	Vaughan A.P.M.
dc.date.accessioned	2024-12-07T09:08:03Z
dc.date.available	2024-12-07T09:08:03Z
dc.date.issued	2006
dc.identifier	https://www.elibrary.ru/item.asp?id=14677033
dc.identifier.citation	Geologica Acta, 2006, 4, 4, 451-459
dc.identifier.issn	1695-6133
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/46855
dc.description.abstract	The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cut by small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes was undertaken to constrain the Late Variscan tectonomagmatic evolution of the region. A well constrained late Permian, Capitanian, age of 264.5 ± 0.9 Ma was obtained by 40Ar/39Ar geochronology using amphibole separates. This new age clearly distinguishes the dykes from other episodes of alkaline mafic magmatism in the region. We suggest that the lamprophyre dykes were emplaced into already solidified granitoids after the tectonic control on magma generation changed from purely extensional to transtensional. © UB-ICTJA.
dc.subject	40AR/39AR DATING
dc.subject	CENTRAL IBERIA
dc.subject	LAMPROPHYRES
dc.subject	TRANSTENSION
dc.subject	VARISCAN
dc.subject	Permian
dc.title	A PRECISE LATE PERMIAN 40AR/39AR AGE FOR CENTRAL IBERIAN CAMPTONITIC LAMPROPHYRES
dc.type	Статья
dc.subject.age	Paleozoic::Permian
dc.subject.age	Палеозой::Пермская