High-resolution P-T-t paths from δ18O zoning in titanite: A snapshot of late-orogenic collapse in the Grenville of New York

Abstract

Research Article| October 01, 2011 High-resolution P-T-t paths from δ18O zoning in titanite: A snapshot of late-orogenic collapse in the Grenville of New York Chloë E. Bonamici; Chloë E. Bonamici * WiscSIMS, Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA *E-mail: bonamici@geology.wisc.edu. Search for other works by this author on: GSW Google Scholar Reinhard Kozdon; Reinhard Kozdon WiscSIMS, Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Takayuki Ushikubo; Takayuki Ushikubo WiscSIMS, Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar John W. Valley John W. Valley WiscSIMS, Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (10): 959–962. https://doi.org/10.1130/G32130.1 Article history received: 01 Feb 2011 rev-recd: 12 May 2011 accepted: 15 May 2011 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 Chloë E. Bonamici, Reinhard Kozdon, Takayuki Ushikubo, John W. Valley; High-resolution P-T-t paths from δ18O zoning in titanite: A snapshot of late-orogenic collapse in the Grenville of New York. Geology 2011;; 39 (10): 959–962. doi: https://doi.org/10.1130/G32130.1 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 We characterize oxygen isotope zoning within single titanite crystals from the Carthage-Colton mylonite zone (CCMZ), Adirondack Mountains (New York State, United States), by ion microprobe. Smooth gradients of δ18O, up to 0.6‰ over 90 μm, resulted from diffusive exchange of oxygen during cooling from peak metamorphic temperatures of 650–700 °C. Modeling of the observed profile indicates punctuated cooling rates of 30–60 °C/m.y. along the CCMZ, set within long periods of much slower cooling. These results indicate a previously unrecognized period of rapid cooling along the CCMZ that is interpreted to result from the post-Ottawan collapse of the Grenville mountain belt and exhumation of the central Adirondack Highlands at ca. 1050 Ma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.