Ti-in-zircon thermometry and crystallization modeling support hot Grenville granite hypothesis

Research Article| March 01, 2014 Ti-in-zircon thermometry and crystallization modeling support hot Grenville granite hypothesis D.P. Moecher; D.P. Moecher 1Department of Earth and Environmental Science, University of Kentucky, Lexington, Kentucky 40506, USA Search for other works by this author on: GSW Google Scholar S.M. McDowell; S.M. McDowell 2Department of Earth and Environmental Science, Vanderbilt University, Nashville, Tennessee 37240, USA Search for other works by this author on: GSW Google Scholar S.D. Samson; S.D. Samson 3Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar C.F. Miller C.F. Miller 2Department of Earth and Environmental Science, Vanderbilt University, Nashville, Tennessee 37240, USA Search for other works by this author on: GSW Google Scholar Author and Article Information D.P. Moecher 1Department of Earth and Environmental Science, University of Kentucky, Lexington, Kentucky 40506, USA S.M. McDowell 2Department of Earth and Environmental Science, Vanderbilt University, Nashville, Tennessee 37240, USA S.D. Samson 3Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA C.F. Miller 2Department of Earth and Environmental Science, Vanderbilt University, Nashville, Tennessee 37240, USA Publisher: Geological Society of America Received: 02 Oct 2013 Revision Received: 12 Dec 2013 Accepted: 18 Dec 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2014 Geological Society of America Geology (2014) 42 (3): 267–270. https://doi.org/10.1130/G35156.1 Article history Received: 02 Oct 2013 Revision Received: 12 Dec 2013 Accepted: 18 Dec 2013 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation D.P. Moecher, S.M. McDowell, S.D. Samson, C.F. Miller; Ti-in-zircon thermometry and crystallization modeling support hot Grenville granite hypothesis. Geology 2014;; 42 (3): 267–270. doi: https://doi.org/10.1130/G35156.1 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 Quantitative modeling of crystallization histories using the program rhyolite-MELTS indicates that zircon crystallization in 1.0 to 1.2 Ga Grenville granitoids with Zr concentrations of 300–1200 ppm begins at 930–1000 °C, and always after onset of crystallization of most other phases (pyroxenes, feldspars, quartz, apatite, ilmenite). Zircon saturation temperatures, calculated from whole-rock compositions and Zr concentrations for modeled samples, range from 835 to 997 °C. Zircon in the two samples with the highest Zr (1201 and 829 ppm) analyzed by sensitive high-resolution ion microprobe (SHRIMP) yielded Ti contents of 10–77 ppm, corresponding to Ti-in-zircon temperatures as high as 1035 °C and 915 °C, respectively. These are among the highest Ti-in-zircon temperatures recorded in magmatic rocks. The modeling and SHRIMP data support the hypothesis that high-Zr Grenville granites are hot granites, and support tectonic models that invoke high-temperature (>900 °C) crustal conditions for generation of Grenville magmas. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.