Research Article| September 01, 2002 Basement complexes in the Wasatch fault, Utah, provide new limits on crustal accretion Stephen T. Nelson; Stephen T. Nelson 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Search for other works by this author on: GSW Google Scholar Ronald A. Harris; Ronald A. Harris 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Search for other works by this author on: GSW Google Scholar Michael J. Dorais; Michael J. Dorais 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Search for other works by this author on: GSW Google Scholar Matthew Heizler; Matthew Heizler 2New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801, USA Search for other works by this author on: GSW Google Scholar Kurt N. Constenius; Kurt N. Constenius 3Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA Search for other works by this author on: GSW Google Scholar Daniel E. Barnett Daniel E. Barnett 4Parr Waddoups Brown Gee & Loveless, P.C., 185 South State Street, Suite 1300, Salt Lake City, Utah 84111, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Stephen T. Nelson 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Ronald A. Harris 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Michael J. Dorais 1Department of Geology, S389 ESC, Brigham Young University, Provo, Utah 84602, USA Matthew Heizler 2New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801, USA Kurt N. Constenius 3Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA Daniel E. Barnett 4Parr Waddoups Brown Gee & Loveless, P.C., 185 South State Street, Suite 1300, Salt Lake City, Utah 84111, USA Publisher: Geological Society of America Received: 22 Jan 2002 Revision Received: 04 May 2002 Accepted: 16 May 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (9): 831–834. https://doi.org/10.1130/0091-7613(2002)030<0831:BCITWF>2.0.CO;2 Article history Received: 22 Jan 2002 Revision Received: 04 May 2002 Accepted: 16 May 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Stephen T. Nelson, Ronald A. Harris, Michael J. Dorais, Matthew Heizler, Kurt N. Constenius, Daniel E. Barnett; Basement complexes in the Wasatch fault, Utah, provide new limits on crustal accretion. Geology 2002;; 30 (9): 831–834. doi: https://doi.org/10.1130/0091-7613(2002)030<0831:BCITWF>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 New and reinterpreted isotopic data for crystalline rocks exposed in the Wasatch Range require a reevaluation of Precambrian crustal boundaries in Utah. Crystalline rocks of the Santaquin Complex underwent metamorphism prior to ca. 1670 Ma, consistent with Sr and Nd isotope data. Mafic to intermediate rocks have major element, trace element, and isotope ratios indicative of derivation in an arc accreted to the Archean craton in Proterozoic time, requiring the crustal suture to be north of the Santaquin Complex. Farther north, the Farmington Canyon Complex has been considered Archean based on published Nd model ages and discordant U/Pb zircon ages. However, Nd model ages and zircons could be inherited from sedimentary protoliths. U/Pb and electron microprobe ages of monazite have a mode at 1650 to 1700 Ma, concordant with the Santaquin Complex, and lack inheritance. We propose that the Farmington Canyon Complex was first cratonized from Archean-derived sediments in the Proterozoic, requiring a crustal suture to be north of it as well. Accretion ages of arc terranes in southeastern Wyoming are ∼60–100 m.y. older than in Utah. Thus, a serious reevaluation of basement architecture in Utah is needed and a previously unrecognized temporal complexity of accretion is indicated. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.