Detrital zircon record of thrust belt unroofing in Lower Cretaceous synorogenic conglomerates, central Utah

Abstract

Research Article| May 01, 2010 Detrital zircon record of thrust belt unroofing in Lower Cretaceous synorogenic conglomerates, central Utah Timothy F. Lawton; Timothy F. Lawton * 1Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA *E-mails: tlawton@nmsu.edu; hunt.gary@gmail.com. Search for other works by this author on: GSW Google Scholar Gary J. Hunt; Gary J. Hunt * 1Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA *E-mails: tlawton@nmsu.edu; hunt.gary@gmail.com. Search for other works by this author on: GSW Google Scholar George E. Gehrels George E. Gehrels 2Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Timothy F. Lawton * 1Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA Gary J. Hunt * 1Department of Geological Sciences, New Mexico State University, Las Cruces, New Mexico 88003, USA George E. Gehrels 2Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA *E-mails: tlawton@nmsu.edu; hunt.gary@gmail.com. Publisher: Geological Society of America Received: 11 Sep 2009 Revision Received: 04 Dec 2009 Accepted: 13 Dec 2009 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2010 Geological Society of America Geology (2010) 38 (5): 463–466. https://doi.org/10.1130/G30684.1 Article history Received: 11 Sep 2009 Revision Received: 04 Dec 2009 Accepted: 13 Dec 2009 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 Timothy F. Lawton, Gary J. Hunt, George E. Gehrels; Detrital zircon record of thrust belt unroofing in Lower Cretaceous synorogenic conglomerates, central Utah. Geology 2010;; 38 (5): 463–466. doi: https://doi.org/10.1130/G30684.1 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 U-Pb detrital zircon (DZ) ages (n = 807) from Lower Cretaceous and lowermost Upper Cretaceous synorogenic conglomerate and interbedded sandstone deposited in and near the foredeep of the Cordilleran foreland basin in central Utah indicate stratigraphic compositional variation among the deposits. Eight DZ age populations, ranging from Archean through Mesozoic, are present in the synorogenic foredeep deposits in varying proportions and permit definition of three compositional suites, termed here chronofacies. Chronofacies A, present in uppermost Neocomian–lowermost Aptian foredeep deposits, contains Archean through early Paleozoic DZ grains derived from Jurassic–Pennsylvanian strata of the thrust belt. Chronofacies B, in Aptian–Albian foredeep deposits, contains Archean and Paleoproterozoic grains with an age peak near 1850 Ma, a population distribution similar to that of lower Paleozoic quartzites of the thrust belt. Chronofacies C, in Albian–lower Cenomanian foredeep deposits, contains a trimodal population distribution of Paleoproterozoic and Mesoproterozoic grains similar to that of Cambrian–Neoproterozoic quartzite strata of the thrust belt. The chronofacies of the foredeep deposits thus record systematic erosional unroofing of the thrust belt during Early Cretaceous time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.