دورية أكاديمية
Pre-Alpine thermal history recorded in the continental crust from Alpine Corsica (France): evidence from zircon and allanite LA-ICP-MS dating
| العنوان: | Pre-Alpine thermal history recorded in the continental crust from Alpine Corsica (France): evidence from zircon and allanite LA-ICP-MS dating |
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| المؤلفون: | Di Rosa M., Farina F., Lanari P., Marroni M. |
| المساهمون: | Di Rosa, M., Farina, F., Lanari, P., Marroni, M. |
| سنة النشر: | 2020 |
| المجموعة: | ARPI - Archivio della Ricerca dell'Università di Pisa |
| مصطلحات موضوعية: | Allanite, Alpine Corsica, Early Permian magmatism, Late Triassic rifting, Pre-Alpine thermal event, U–pb dating, Venaco-Ghisoni Unit, Zircon |
| الوصف: | The pre-Alpine history of the Venaco-Ghisoni Unit, a continental unit belonging to the Alpine Corsica (France), was reconstructed on the basis of U–Pb dating of zircon and allanite. Zircon was separated from a metagranitoid and an epidote-bearing metagabbro and analyzed by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). Magmatic ages ranging from 291 to 265Ma were obtained for the metagranitoid samples and 276.9 ± 1.1Ma for the epidote-bearing metagabbro. This geochronological dataset, combined with field observations, microstructural and cathodoluminescence analysis demonstrate that in the Early Permian, the Variscan basement of the Venaco-Ghisoni Unit was intruded first by the granitoid and then by the gabbro. Allanite was identified in the metagranitoid and exhibit an U–Pb age of 225 ± 8Ma. We interpret this age as reflecting metamorphism associated to the Late Triassic rifting predating the opening of the Piemonte-Liguria Ocean. The absence of middle Eocene—Oligocene zircon and allanite overgrowths is compatible with the low metamorphic conditions (< 350–400°C) recorded by the Venaco-Ghisoni Unit during Alpine metamorphism. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000590561400001; volume:113; issue:1; numberofpages:22; journal:SWISS JOURNAL OF GEOSCIENCES; http://hdl.handle.net/11568/1064743Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85096221145; https://link.springer.com/article/10.1186/s00015-020-00374-2Test |
| DOI: | 10.1186/s00015-020-00374-2 |
| الإتاحة: | https://doi.org/10.1186/s00015-020-00374-2Test http://hdl.handle.net/11568/1064743Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.C75ED644 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1186/s00015-020-00374-2 |
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