Dating a Variscan pressure-temperature loop with staurolite

Research Article| December 01, 1995 Dating a Variscan pressure-temperature loop with staurolite R. Frei; R. Frei 1Gruppe Isotopengeologie, Mineralogisch-Petrographisches Institut, Universität Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland Search for other works by this author on: GSW Google Scholar G. G. Biino; G. G. Biino 2Institute de Minéralogie et Pétrographie, Université Fribourg, Pérolles, CH-1700 Fribourg, Switzerland Search for other works by this author on: GSW Google Scholar C. Prospert C. Prospert 2Institute de Minéralogie et Pétrographie, Université Fribourg, Pérolles, CH-1700 Fribourg, Switzerland Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (12): 1095–1098. https://doi.org/10.1130/0091-7613(1995)023<1095:DAVPTL>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation R. Frei, G. G. Biino, C. Prospert; Dating a Variscan pressure-temperature loop with staurolite. Geology 1995;; 23 (12): 1095–1098. doi: https://doi.org/10.1130/0091-7613(1995)023<1095:DAVPTL>2.3.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 Staurolite with a complex internal metamorphic and structural relationship occurs in metapelite from the Silvretta thrust sheet (eastern Alps). Stepwise leaching of a core and rim fraction of a single staurolite crystal resulted in a total Pb-Pb isochron of 308 ± 28 Ma. The Variscan metamorphism has been confirmed by a further single bulk staurolite Pb-Pb age of 298 ± 42 Ma, which is in accordance with U-Pb ages of 306 ± 8 Ma and 304 ± 6 Ma, respectively, obtained from combined U-Pb leaching of the same crystals. Direct dating of the staurolite-in reaction isograd was therefore successful. Our results date the prograde part of a Variscan counterclockwise pressure-temperature path in the Silvretta thrust sheet. Proximity with white-mica Rb-Sr and K-Ar cooling ages suggests that the whole Variscan episode was fast and took place within a few million years. 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.