Discovery of high-pressure ZrSiO4 polymorph in naturally occurring shock-metamorphosed zircons

Research Article| April 01, 2001 Discovery of high-pressure ZrSiO4 polymorph in naturally occurring shock-metamorphosed zircons B.P. Glass; B.P. Glass 1Department of Geology, University of Delaware, Newark, Delaware 19716, USA Search for other works by this author on: GSW Google Scholar Shaobin Liu Shaobin Liu 1Department of Geology, University of Delaware, Newark, Delaware 19716, USA Search for other works by this author on: GSW Google Scholar Author and Article Information B.P. Glass 1Department of Geology, University of Delaware, Newark, Delaware 19716, USA Shaobin Liu 1Department of Geology, University of Delaware, Newark, Delaware 19716, USA Publisher: Geological Society of America Received: 11 Sep 2000 Revision Received: 18 Dec 2000 Accepted: 21 Dec 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (4): 371–373. https://doi.org/10.1130/0091-7613(2001)029<0371:DOHPZP>2.0.CO;2 Article history Received: 11 Sep 2000 Revision Received: 18 Dec 2000 Accepted: 21 Dec 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation B.P. Glass, Shaobin Liu; Discovery of high-pressure ZrSiO4 polymorph in naturally occurring shock-metamorphosed zircons. Geology 2001;; 29 (4): 371–373. doi: https://doi.org/10.1130/0091-7613(2001)029<0371:DOHPZP>2.0.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 Shock-metamorphosed zircons were recovered from an upper Eocene impact ejecta layer, probably from the Chesapeake Bay impact structure, found at three Deep Sea Drilling Project–Ocean Drilling Program Sites (612, 903, and 904) on the upper continental slope off New Jersey. The shocked zircons exhibit granular textures, and some have planar features. X-ray diffraction patterns show that some of the shocked zircons contain a high- pressure ZrSiO4 polymorph with a scheelite-type structure that was first produced in laboratory experiments in 1969. The presence of the high-pressure ZrSiO4 polymorph in some of the zircons indicates that they have been shock metamorphosed at pressures between 20 and 90 GPa. The discovery of this phase in naturally occurring shocked zircons confirms previous predictions that this phase would be found in shock-metamorphosed rocks from impact structures, and it provides a new tool for calibrating peak shock pressures in impact structures and ejecta. In addition, because the high-pressure ZrSiO4 polymorph has now been found in naturally occurring samples, it can be given a mineral name. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.