A precise late Permian 40Ar/ 39Ar age for Central Iberian camptonitic lamprophyres
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| Format: | Artículo científico |
| Langue: | en |
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Universitat de Barcelona
2006
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| _version_ | 1876465203385729024 |
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| author | F. Bea |
| author_facet | F. Bea |
| contents | A precise late Permian 40Ar/ 39Ar age for Central Iberian camptonitic lamprophyres F. Bea P. Montero J.H. Scarrow J.F. Molina A.P.M. Vaughan Ciencias de la Tierra 40Ar Variscan 39Ar dating Lamprophyres Transtension The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cutby small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes wasundertaken 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 controlon magma generation changed from purely extensional to transtensional. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540403 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.4 |
| format | Artículo científico |
| id | redalyc_50540403 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universitat de Barcelona |
| spellingShingle | A precise late Permian 40Ar/ 39Ar age for Central Iberian camptonitic lamprophyres F. Bea Ciencias de la Tierra 40Ar Variscan 39Ar dating Lamprophyres Transtension A precise late Permian 40Ar/ 39Ar age for Central Iberian camptonitic lamprophyres F. Bea P. Montero J.H. Scarrow J.F. Molina A.P.M. Vaughan Ciencias de la Tierra 40Ar Variscan 39Ar dating Lamprophyres Transtension The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cutby small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes wasundertaken 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 controlon magma generation changed from purely extensional to transtensional. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540403 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.4 |
| title | A precise late Permian 40Ar/ 39Ar age for Central Iberian camptonitic lamprophyres |
| topic | Ciencias de la Tierra 40Ar Variscan 39Ar dating Lamprophyres Transtension |
| url | https://www.redalyc.org/articulo.oa?id=50540403 |