Single-crystal 40Ar-39Ar dating of pyrite: No fool's clock

Research Article| May 01, 2001 Single-crystal 40Ar-39Ar dating of pyrite: No fool's clock Patrick E. Smith; Patrick E. Smith 1Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada Search for other works by this author on: GSW Google Scholar Norman M. Evensen; Norman M. Evensen 1Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada Search for other works by this author on: GSW Google Scholar Derek York; Derek York 1Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada Search for other works by this author on: GSW Google Scholar Peter Szatmari; Peter Szatmari 2Petrobras Research Center (CENPES), Rio de Janeiro 21949-900, Brazil Search for other works by this author on: GSW Google Scholar Diogenes Custodio de Oliveira Diogenes Custodio de Oliveira 2Petrobras Research Center (CENPES), Rio de Janeiro 21949-900, Brazil Search for other works by this author on: GSW Google Scholar Geology (2001) 29 (5): 403–406. https://doi.org/10.1130/0091-7613(2001)029<0403:SCAADO>2.0.CO;2 Article history received: 22 Aug 2000 rev-recd: 22 Jan 2001 accepted: 29 Jan 2001 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 Patrick E. Smith, Norman M. Evensen, Derek York, Peter Szatmari, Diogenes Custodio de Oliveira; Single-crystal 40Ar-39Ar dating of pyrite: No fool's clock. Geology 2001;; 29 (5): 403–406. doi: https://doi.org/10.1130/0091-7613(2001)029<0403:SCAADO>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 Single crystals of dispersed trace pyrite from two igneous rocks were dated by using the 40Ar-39Ar laser probe method, and the resulting ages were compared to step-heating ages of associated amphibole and phlogopite. The isochron ages for 0.1–0.3 mm cubes of pyrite agree well with the respective amphibole ages of these igneous samples. Preliminary step-heating analyses of single pyrite crystals yield internal isochrons with indistinguishable, although less precise, ages. Both pyrite and amphibole are significantly older than associated phlogopite in one sample, which has undergone postcrystallization alteration. These results suggest that pyrite can give reliable and precise 40Ar-39Ar ages even in the presence of subsequent alteration. Given the ubiquity of pyrite in many geologic environments, this technique has great promise for application to the dating of ores, sediments, and hydrocarbon migration, all of which have been very difficult to date directly. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.