Linking granulites, silicic magmatism, and crustal growth in arcs: Ion microprobe (zircon) U-Pb ages from the Hidaka metamorphic belt, Japan

Abstract

Research Article| September 01, 2007 Linking granulites, silicic magmatism, and crustal growth in arcs: Ion microprobe (zircon) U-Pb ages from the Hidaka metamorphic belt, Japan A.I.S. Kemp; A.I.S. Kemp 1School of Earth and Environmental Science, James Cook University, 4811 Townsville, Australia Search for other works by this author on: GSW Google Scholar EIMF; EIMF Search for other works by this author on: GSW Google Scholar T. Shimura; T. Shimura 2Department of Geology, Faculty of Science, Niigata University, 950-2181 Niigata, Japan Search for other works by this author on: GSW Google Scholar EIMF; EIMF Search for other works by this author on: GSW Google Scholar C. J. Hawkesworth; C. J. Hawkesworth 3Department of Earth Sciences, University of Bristol, BS8 1RJ Bristol, UK Search for other works by this author on: GSW Google Scholar EIMF EIMF Search for other works by this author on: GSW Google Scholar Geology (2007) 35 (9): 807–810. https://doi.org/10.1130/G23586A.1 Article history received: 18 Dec 2006 rev-recd: 10 Apr 2007 accepted: 11 Apr 2007 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation A.I.S. Kemp, T. Shimura, C. J. Hawkesworth; EIMF, Linking granulites, silicic magmatism, and crustal growth in arcs: Ion microprobe (zircon) U-Pb ages from the Hidaka metamorphic belt, Japan. Geology 2007;; 35 (9): 807–810. doi: https://doi.org/10.1130/G23586A.1 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 There is no consensus as to how the extreme metamorphic conditions required to form granulites are attained, or how these rocks relate to crustal growth and differentiation processes. Studying young granulites offers two advantages: the tectonic setting is likely to be well constrained, and the ambiguities that result from overprinting by younger metamorphic events are potentially avoided. We report the first ion microprobe U-Pb (zircon) ages for orthopyroxene-bearing granulites, tonalites, and gabbros of the Cenozoic Hidaka metamorphic belt (Hokkaido, Japan) to clarify the magmatic-metamorphic connection in this area. The data support a two-stage evolution for this terrane, which is attributed to episodes of supra-subduction zone magmatism (late Eocene) and back-arc extension (early Miocene). We relate granulite facies metamorphism and garnet-orthopyroxene tonalite generation to mafic magma under-accretion and lithosphere thinning due to the opening of the Japan Sea at 19 Ma. The Hidaka granulites are thus among the youngest exposed granulites on Earth, and manifest the thermal response to continental growth. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.