Sensitive high-resolution ion microprobe analysis of zircon reequilibrated by late magmatic fluids in a hybridized pluton

Research Article| December 01, 2009 Sensitive high-resolution ion microprobe analysis of zircon reequilibrated by late magmatic fluids in a hybridized pluton Monika A. Kusiak; Monika A. Kusiak * 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland *E-mail: mkusiak@twarda.pan.pl Search for other works by this author on: GSW Google Scholar Daniel J. Dunkley; Daniel J. Dunkley 2National Institute of Polar Research, Tokyo, Japan Search for other works by this author on: GSW Google Scholar Ewa Słaby; Ewa Słaby 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland Search for other works by this author on: GSW Google Scholar Hervé Martin; Hervé Martin 3Laboratoire Magmas et Volcans, Observatoire de Physique du Globe de Clermont-Ferrand, Centre National de la Recherche Scientifique, Université Blaise Pascal, Clermont-Ferrand, France Search for other works by this author on: GSW Google Scholar Bartosz Budzyń Bartosz Budzyń 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland Search for other works by this author on: GSW Google Scholar Author and Article Information Monika A. Kusiak * 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland Daniel J. Dunkley 2National Institute of Polar Research, Tokyo, Japan Ewa Słaby 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland Hervé Martin 3Laboratoire Magmas et Volcans, Observatoire de Physique du Globe de Clermont-Ferrand, Centre National de la Recherche Scientifique, Université Blaise Pascal, Clermont-Ferrand, France Bartosz Budzyń 1Polish Academy of Sciences, Institute of Geological Sciences, Kraków-Warszawa, Poland *E-mail: mkusiak@twarda.pan.pl Publisher: Geological Society of America Received: 17 Jan 2009 Revision Received: 25 Jun 2009 Accepted: 06 Jul 2009 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (12): 1063–1066. https://doi.org/10.1130/G30048A.1 Article history Received: 17 Jan 2009 Revision Received: 25 Jun 2009 Accepted: 06 Jul 2009 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Monika A. Kusiak, Daniel J. Dunkley, Ewa Słaby, Hervé Martin, Bartosz Budzyń; Sensitive high-resolution ion microprobe analysis of zircon reequilibrated by late magmatic fluids in a hybridized pluton. Geology 2009;; 37 (12): 1063–1066. doi: https://doi.org/10.1130/G30048A.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 Zircon from a microgranular enclave in the ca. 315 Ma postcollisional Karkonosze pluton (Western Sudetes, northeastern Bohemian Massif) is characterized by unusual morphologies and reequilibration textures. Blocky, clustered, and skeletal Th-U–rich zircon grains are internally corroded along discrete boundary zones, and subsequently replaced by porous microgranular aggregates of zircon and various other minerals, including thorite. The boundary zones have textures and compositions characteristic of diffusion-controlled chemical reaction fronts, including enrichment in Ca, Ba, and light rare earth elements, whereas microgranular domains are typical of zircon replacement and regrowth by coupled dissolution and precipitation. Initial zircon crystallization occurred with the mingling of mafic magma into a cooler granitic melt, whereas zircon modification is attributed to the reaction of late magmatic fluids from the host granite with the enclave. Precise dating of reequilibrated zircon as 304 ± 2 Ma indicates that fluid activity, which is also responsible for scheelite mineralization, postdates the emplacement of the main part of the pluton by several millions of years. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.