U-Pb age of zircon from Vernal Mesa-type quartz monzonite, Unaweep Canyon, west-central Colorado
Abstract
Research Article| October 01, 1975 U-Pb age of zircon from Vernal Mesa-type quartz monzonite, Unaweep Canyon, west-central Colorado M. E. BICKFORD; M. E. BICKFORD 1Department of Geology, University of Kansas, Lawrence, Kansas 66045 Search for other works by this author on: GSW Google Scholar T. F. CUDZILO T. F. CUDZILO 1Department of Geology, University of Kansas, Lawrence, Kansas 660452Present address: Chevron Oil Company, Minerals Staff, Box 599, Denver, Colorado 80201. Search for other works by this author on: GSW Google Scholar Author and Article Information M. E. BICKFORD 1Department of Geology, University of Kansas, Lawrence, Kansas 66045 T. F. CUDZILO 1Department of Geology, University of Kansas, Lawrence, Kansas 660452Present address: Chevron Oil Company, Minerals Staff, Box 599, Denver, Colorado 80201. Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1975) 86 (10): 1432–1434. https://doi.org/10.1130/0016-7606(1975)86<1432:UAOZFV>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation M. E. BICKFORD, T. F. CUDZILO; U-Pb age of zircon from Vernal Mesa-type quartz monzonite, Unaweep Canyon, west-central Colorado. GSA Bulletin 1975;; 86 (10): 1432–1434. doi: https://doi.org/10.1130/0016-7606(1975)86<1432:UAOZFV>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 SocietyGSA Bulletin Search Advanced Search Abstract The Vernal Mesa-type quartz monzonite is an igneous body of batholithic proportions of Precambrian age in western Colorado and eastern Utah. A Rb-Sr age of 1,480 ± 40 m.y. has been previously reported; other Rb-Sr data reported suggest that the rock might be as much as 200 m.y. older than this. The U-Pb age of the suite of zircons is 1,443 ± 22 m.y., confirming that the Vernal Mesa was formed during the igneous activity which was widespread in the southwestern and central United States 1,450 to 1,500 m.y. ago. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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