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<title lang=en>Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology</title>
<creator>Manzotti, Paola</creator>
<creator>Rubatto, Daniela</creator>
<creator>Zucali, Michel</creator>
<creator>Korh, Afifé El</creator>
<creator>Cenki-Tok, Bénédicte</creator>
<creator>Ballevre, Michel</creator>
<creator>Engi, Martin</creator>
<contributor>Institut des Sciences de la Terre ; University of Lausanne</contributor>
<contributor>Australian National University (ANU)</contributor>
<contributor>Università degli studi di Milano [Milano]</contributor>
<contributor>University of Fribourg</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Terre, Temps, Traçage ; Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS) - Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institute of Geological Sciences, University of Bern ; Universität Bern [Bern]</contributor>
<description>International audience</description>
<source>ISSN: 1661-8726</source>
<source>Swiss Journal of Geosciences</source>
<publisher>Springer</publisher>
<identifier>insu-01622179</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01622179</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01622179</source>
<source>Swiss Journal of Geosciences, Springer, 2017, Accepté. 〈10.1007/s00015-017-0284-1〉</source>
<identifier>DOI : 10.1007/s00015-017-0284-1</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1007/s00015-017-0284-1</relation>
<language>en</language>
<subject lang=en>Permian magmatism</subject>
<subject lang=en>Regional HT metamorphism</subject>
<subject lang=en>Allanite</subject>
<subject lang=en>Zircon</subject>
<subject lang=en>Sesia-Dent Blanche nappes</subject>
<subject lang=en>Alps</subject>
<subject>[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In the Dent Blanche Tectonic System, the Mont Morion biotite-bearing granite is a km-scale intrusion preserved in a low-strain volume. Zircon saturation thermometry suggests that it crystallised from a melt that reached about 800 °C. U–Pb zircon and allanite geochronology indicates crystallization of the magma in the Permian (290 ± 3 Ma; 280 ± 8 Ma, respectively). Migmatitic biotite-gneiss and amphibolite are found as xenoliths within the Mont Morion granite and constitute its country-rocks. In two samples of migmatitic biotite-gneiss zircon has metamorphic overgrowths that yield U–Pb ages of 285 ± 3 Ma and 281 ± 4 Ma, and are thus contemporaneous with the intrusion of the granite. The Mont Morion granite with its country-rocks of migmatitic biotite-bearing gneiss and amphibolite was thus emplaced at middle crustal levels while amphibolite facies metamorphism affected its country rocks. The magmatic and metamorphic record in the Mont Morion area reflects the high-temperature regime and lithospheric thinning of the Adriatic continental margin during Permian.</description>
<date>2017</date>
</dc>
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