A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres
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 we...
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| Format: | Article |
| Language: | English |
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2006-01-01
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| Series: | Geologica Acta |
| Subjects: | |
| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/1888 |
| _version_ | 1797654649910591488 |
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| author | J.H. SCARROW F. BEA P. GONZÁLEZ MONTERO J. F. MOLINA PALMA ALAN VAUGHAN |
| author_facet | J.H. SCARROW F. BEA P. GONZÁLEZ MONTERO J. F. MOLINA PALMA ALAN VAUGHAN |
| author_sort | J.H. SCARROW |
| collection | DOAJ |
| description | 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 ± 1.3 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. |
| first_indexed | 2024-03-11T17:02:35Z |
| format | Article |
| id | doaj.art-b44eed18a3c74e3799e2e6b041d19b3f |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:02:35Z |
| publishDate | 2006-01-01 |
| publisher | Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
| record_format | Article |
| series | Geologica Acta |
| spelling | doaj.art-b44eed18a3c74e3799e2e6b041d19b3f2023-10-20T07:12:06ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282006-01-014410.1344/105.000000346A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyresJ.H. SCARROW0F. BEA1P. GONZÁLEZ MONTERO2J. F. MOLINA PALMA3ALAN VAUGHAN4Dept. Mineralogy and PetrologyUniversity of Granada, Campus Fuentenueva, 18002 Granada, Spain.Dept. Mineralogy and PetrologyUniversity of Granada, Campus Fuentenueva, 18002 Granada, Spain.Dept. Mineralogy and PetrologyUniversity of Granada, Campus Fuentenueva, 18002 Granada, Spain.Dept. Mineralogy and PetrologyUniversity of Granada, Campus Fuentenueva, 18002 Granada, Spain.British Antarctic SurveyHigh Cross, Madingley Road, Cambridge, CB3 0ET, U.K.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 ± 1.3 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.https://revistes.ub.edu/index.php/GEOACTA/article/view/188840Ar/39Ar datingLamprophyresVariscanCentral IberiaTranstension. |
| spellingShingle | J.H. SCARROW F. BEA P. GONZÁLEZ MONTERO J. F. MOLINA PALMA ALAN VAUGHAN A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres Geologica Acta 40Ar/39Ar dating Lamprophyres Variscan Central Iberia Transtension. |
| title | A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres |
| title_full | A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres |
| title_fullStr | A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres |
| title_full_unstemmed | A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres |
| title_short | A precise late Permian 40Ar/39Ar age for Central Iberian camptonitic lamprohyres |
| title_sort | precise late permian 40ar 39ar age for central iberian camptonitic lamprohyres |
| topic | 40Ar/39Ar dating Lamprophyres Variscan Central Iberia Transtension. |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/1888 |
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