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https://hdl.handle.net/2440/16573
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Type: | Journal article |
Title: | U-Pb SHRIMP data on the crystallization age of the Gran Paradiso augengneiss, Italian Western Alps: Further evidence for Permian magmatic activity in the Alps during break-up of Pangea |
Author: | Ring, U. Collins, A. Kassem, O. |
Citation: | Swiss Journal of Geosciences (Print Edition), 2005; 98(3):363-370 |
Publisher: | Birkhauser Verlag Ag |
Issue Date: | 2005 |
ISSN: | 0012-9402 1420-9128 |
Statement of Responsibility: | Uwe Ring, Alan S. Collins and Osama K. Kassem |
Abstract: | New U-Pb Sensitive High Resolution Ion MicroProbe (SHRIMP) ages from two augengneiss samples of the Gran Paradiso Massif in the Italian Western Alps yielded well-defined Late Permian crystallization ages of 269.0±6.5 Ma and 270.2±5.0 Ma. The ages provide further evidence that the Gran Paradiso augengneiss is not Variscan basement but reflects post-Variscan magmatic activity related to the break-up of Pangea after the Variscan orogeny eventually leading to the formation of Neo-Tethys. The Gran Paradiso Massif belongs to the so-called internal massifs, which are marked by extension-related bimodal magmatism during the Permian and Mesozoic. Furthermore, the Late Permian ages suggest that the Gran Paradiso Massif did not belong to the same pre- Alpine tectonic domain as the External massifs (as part of the European plate margin), which are characterized by Variscan basement. |
Keywords: | U-Pb dating SHRIMP zircon Permian magmatism Gran Paradiso Massif Italian Western Alps |
Description: | The original publication can be found at www.springerlink.com |
DOI: | 10.1007/s00015-005-1170-9 |
Published version: | http://dx.doi.org/10.1007/s00015-005-1170-9 |
Appears in Collections: | Aurora harvest 6 Earth and Environmental Sciences publications |
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