Fission-track evidence for Late Triassic oceanic crust in the French Occidental Alps

Research Article| February 01, 1984 Fission-track evidence for Late Triassic oceanic crust in the French Occidental Alps Joëlle Carpena; Joëlle Carpena 1Centre des Faibles Radioactivités, Laboratoire Mixte CNRS-CEA, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France Search for other works by this author on: GSW Google Scholar Renaud Caby Renaud Caby 2Centre Géologique et Géophysique, Université des Sciences, Place Eugène Bataillon, 34060 Montpellier Cedex, France Search for other works by this author on: GSW Google Scholar Author and Article Information Joëlle Carpena 1Centre des Faibles Radioactivités, Laboratoire Mixte CNRS-CEA, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France Renaud Caby 2Centre Géologique et Géophysique, Université des Sciences, Place Eugène Bataillon, 34060 Montpellier Cedex, France Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (2): 108–111. https://doi.org/10.1130/0091-7613(1984)12<108:FEFLTO>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Joëlle Carpena, Renaud Caby; Fission-track evidence for Late Triassic oceanic crust in the French Occidental Alps. Geology 1984;; 12 (2): 108–111. doi: https://doi.org/10.1130/0091-7613(1984)12<108:FEFLTO>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Five zircons and one apatite from plutonic rocks of the ophiolitic sequence from the Piemontese zone (western Alps, southeast France) have been dated by the fission-track method. The ages obtained indicate that the minimum age of the Alpine oceanic crust in this zone is between 192 ± 6 and 212 ± 8 m.y. (Late Triassic–Liassic). Consideration of the available data on fission-track retention conditions in zircons and pressure-temperature conditions allowed by the high-pressure mineralogic assemblages of the rocks leads to the conclusion that in the external part of the Piemontese zone, the temperature-duration conditions of the high-pressure Alpine metamorphism were inadequate to significantly reset the zircons' fission-track clock, suggesting a short-lived metamorphic event. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.