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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
Statement of
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
Permian magmatism
Gran Paradiso Massif
Italian Western Alps
Description: The original publication can be found at
DOI: 10.1007/s00015-005-1170-9
Appears in Collections:Aurora harvest 6
Earth and Environmental Sciences publications

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