Rates of thermal equilibration at the onset of subduction deduced from diffusion modeling of eclogitic garnets, Yukon-Tanana terrane, Canada

Abstract

Research Article| June 01, 1999 Rates of thermal equilibration at the onset of subduction deduced from diffusion modeling of eclogitic garnets, Yukon-Tanana terrane, Canada Alexei Perchuk; Alexei Perchuk 1IGEM, Russian Academy of Sciences, Staromonetny 35, Moscow, 109017, Russia2CNRS-ESA 7058, Laboratoire de Pétrologie, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Pascal Philippot; Pascal Philippot 2CNRS-ESA 7058, Laboratoire de Pétrologie, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Philippe Erdmer; Philippe Erdmer 3Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar Michel Fialin Michel Fialin 4CAMPARIS, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Author and Article Information Alexei Perchuk 1IGEM, Russian Academy of Sciences, Staromonetny 35, Moscow, 109017, Russia2CNRS-ESA 7058, Laboratoire de Pétrologie, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Pascal Philippot 2CNRS-ESA 7058, Laboratoire de Pétrologie, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Philippe Erdmer 3Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Michel Fialin 4CAMPARIS, Université Paris 6, T26-E3, 4 place Jussieu, 75005 Paris, France Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (6): 531–534. https://doi.org/10.1130/0091-7613(1999)027<0531:ROTEAT>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Alexei Perchuk, Pascal Philippot, Philippe Erdmer, Michel Fialin; Rates of thermal equilibration at the onset of subduction deduced from diffusion modeling of eclogitic garnets, Yukon-Tanana terrane, Canada. Geology 1999;; 27 (6): 531–534. doi: https://doi.org/10.1130/0091-7613(1999)027<0531:ROTEAT>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 Well-preserved eclogitic rocks near Faro (Yukon-Tanana terrane, Canada) underwent a prograde evolution from ∼510 °C and ≥ 1.1 GPa to 690 °C and ≥ 1.5 Gpa followed by near-isobaric cooling to ∼540 °C. A remarkable feature of the garnet porphyroblast cores is the presence of minute garnet "inclusions" of distinctly different composition. Preservation of a sharp compositional gradient at the interface between the host and the inclusion garnets and results of diffusion modeling indicate that the counterclockwise pressure-time evolution took place on a very short time scale of about 0.2 m.y. Minimum rates of heating (950 °C/m.y.) and burial (7 cm/yr) calculated along the prograde part of the path are in good agreement with values extracted from thermal models of newly initiated subduction zones. 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.