Fluid inclusion evidence for minimum 11 km vertical offset on the Wasatch fault, Utah

Research Article| January 01, 1987 Fluid inclusion evidence for minimum 11 km vertical offset on the Wasatch fault, Utah W. T. Parry; W. T. Parry 1Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112 Search for other works by this author on: GSW Google Scholar R. L. Bruhn R. L. Bruhn 1Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112 Search for other works by this author on: GSW Google Scholar Author and Article Information W. T. Parry 1Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112 R. L. Bruhn 1Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1987) 15 (1): 67–70. https://doi.org/10.1130/0091-7613(1987)15<67:FIEFMK>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 MailTo Tools Icon Tools Get Permissions Search Site Citation W. T. Parry, R. L. Bruhn; Fluid inclusion evidence for minimum 11 km vertical offset on the Wasatch fault, Utah. Geology 1987;; 15 (1): 67–70. doi: https://doi.org/10.1130/0091-7613(1987)15<67:FIEFMK>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 The footwall of the Wasatch fault in the Corner Creek area near Salt Lake City is hydrothermally altered and deformed quartz monzonite of the Oligocene Little Cottonwood stock. Secondary fluid inclusions are associated with hydrothermal alteration minerals and structural deformation. Thermometric measurements of fluid inclusion characteristics indicate entrapment of a CO2-H2O-NaCl fluid at minimum temperatures of 223–353 °C and minimum fluid pressures of 900–2800 bar. The 2800-bar fluid pressure is near lithostatic pressure at a depth of 11 km, the minimum displacement of the fault that is required for exhumation of the observed alteration and fluid inclusions and more than three times greater than most previous estimates. The large displacement estimate is supported by the occurrence of pyrophyllite in shales in the footwall, by the petrology of metamorphosed shale surrounding an unroofed pluton in the footwall, and by geologic reconstruction of the eroded footwall. 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.