A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universitat de Barcelona
2006
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| _version_ | 1876477646884306944 |
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| author | C. Talavera |
| author_facet | C. Talavera |
| contents | A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating C. Talavera T. Zinger F. Bea P. Montero Ciencias de la Tierra Pre Gneiss Variscan Pb dating Ollo de Sapo The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, onthe base of a U-Pb discordia upper intercept of 618 ± 9 Ma. Nevertheless, new ion-microprobe and LA-ICPMSU-Pb zircon dating revealed that the crystallization age was 483 ± 3 Ma. The orthogneiss also contains a 605 ±13 Ma zircon population that indicates that the source-rock for the Ordovician magma was Pan-African. Moreover,a few ~3.17 Ga zircon grains were also recorded. These grains are the oldest found so far in Iberia, and itsoccurrence would suggest the involvement of an Archean crust in the Pan-African orogeny. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540306 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.3 Vol.4 |
| format | Artículo científico |
| id | redalyc_50540306 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universitat de Barcelona |
| spellingShingle | A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating C. Talavera Ciencias de la Tierra Pre Gneiss Variscan Pb dating Ollo de Sapo A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating C. Talavera T. Zinger F. Bea P. Montero Ciencias de la Tierra Pre Gneiss Variscan Pb dating Ollo de Sapo The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, onthe base of a U-Pb discordia upper intercept of 618 ± 9 Ma. Nevertheless, new ion-microprobe and LA-ICPMSU-Pb zircon dating revealed that the crystallization age was 483 ± 3 Ma. The orthogneiss also contains a 605 ±13 Ma zircon population that indicates that the source-rock for the Ordovician magma was Pan-African. Moreover,a few ~3.17 Ga zircon grains were also recorded. These grains are the oldest found so far in Iberia, and itsoccurrence would suggest the involvement of an Archean crust in the Pan-African orogeny. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540306 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.3 Vol.4 |
| title | A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating |
| topic | Ciencias de la Tierra Pre Gneiss Variscan Pb dating Ollo de Sapo |
| url | https://www.redalyc.org/articulo.oa?id=50540306 |