Research Article| April 01, 2001 40Ar/39Ar age and chemistry of manganese mineralization in the Moab and Lisbon fault systems, southeastern Utah Marjorie A. Chan; Marjorie A. Chan 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA Search for other works by this author on: GSW Google Scholar William T. Parry; William T. Parry 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA Search for other works by this author on: GSW Google Scholar Erich U. Petersen; Erich U. Petersen 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA Search for other works by this author on: GSW Google Scholar Chris M. Hall Chris M. Hall 2Department of Geological Sciences, University of Michigan, 2534 C.C. Little Building, Ann Arbor, Michigan 48109-2534, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Marjorie A. Chan 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA William T. Parry 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA Erich U. Petersen 1Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112-0111, USA Chris M. Hall 2Department of Geological Sciences, University of Michigan, 2534 C.C. Little Building, Ann Arbor, Michigan 48109-2534, USA Publisher: Geological Society of America Received: 11 Aug 2000 Revision Received: 26 Dec 2000 Accepted: 27 Dec 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (4): 331–334. https://doi.org/10.1130/0091-7613(2001)029<0331:AAAACO>2.0.CO;2 Article history Received: 11 Aug 2000 Revision Received: 26 Dec 2000 Accepted: 27 Dec 2000 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 Marjorie A. Chan, William T. Parry, Erich U. Petersen, Chris M. Hall; 40Ar/39Ar age and chemistry of manganese mineralization in the Moab and Lisbon fault systems, southeastern Utah. Geology 2001;; 29 (4): 331–334. doi: https://doi.org/10.1130/0091-7613(2001)029<0331:AAAACO>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 Diagenetic iron and manganese mineralization is associated with the Moab and Lisbon faults and is an important indicator of fluid flow in Jurassic Navajo Sandstone of southeastern Utah. Reducing brines originating from the Pennsylvanian Paradox Formation (with or without hydrocarbons) mobilized disseminated iron and manganese in the Jurassic sandstones and mixed with shallow, oxygenated groundwater to precipitate both iron and manganese mineralization. Mineralization consists of colliform and concretionary hematite, pyrolusite, and cryptomelane-hollandite that contains 1.33–2.12 wt% K. The 40Ar/39Ar dating of vacuum-encapsulated cryptomelane yields age estimates of 25–20 Ma, indicating mineralization coincident with either a Colorado Plateau uplift episode or La Sal Mountains volcanism. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.