Direct dating of gold by radiogenic helium: Testing the method on gold from Diamantina, Minas Gerais, Brazil

Abstract

Research Article| February 01, 2013 Direct dating of gold by radiogenic helium: Testing the method on gold from Diamantina, Minas Gerais, Brazil Alexandre Raphael Cabral; Alexandre Raphael Cabral * 1Mineral Deposits, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany *E-mail: [e-mail]. Search for other works by this author on: GSW Google Scholar Otto Eugster; Otto Eugster 2Physics Institute, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland Search for other works by this author on: GSW Google Scholar Michael Brauns; Michael Brauns 3Curt-Engelhorn-Zentrum Archäometrie, An-Institut der Universität Tübingen, D6, 3, D-68159 Mannheim, Germany Search for other works by this author on: GSW Google Scholar Bernd Lehmann; Bernd Lehmann 1Mineral Deposits, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany Search for other works by this author on: GSW Google Scholar Delia Rösel; Delia Rösel 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany Search for other works by this author on: GSW Google Scholar Thomas Zack; Thomas Zack 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany Search for other works by this author on: GSW Google Scholar Francisco Robério de Abreu; Francisco Robério de Abreu 5Votorantim Metais, Praça Ramos de Azevedo 206, 01037-010 São Paulo-SP, Brazil Search for other works by this author on: GSW Google Scholar Ernst Pernicka; Ernst Pernicka 3Curt-Engelhorn-Zentrum Archäometrie, An-Institut der Universität Tübingen, D6, 3, D-68159 Mannheim, Germany Search for other works by this author on: GSW Google Scholar Matthias Barth Matthias Barth 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Alexandre Raphael Cabral * 1Mineral Deposits, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany Otto Eugster 2Physics Institute, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland Michael Brauns 3Curt-Engelhorn-Zentrum Archäometrie, An-Institut der Universität Tübingen, D6, 3, D-68159 Mannheim, Germany Bernd Lehmann 1Mineral Deposits, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany Delia Rösel 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany Thomas Zack 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany Francisco Robério de Abreu 5Votorantim Metais, Praça Ramos de Azevedo 206, 01037-010 São Paulo-SP, Brazil Ernst Pernicka 3Curt-Engelhorn-Zentrum Archäometrie, An-Institut der Universität Tübingen, D6, 3, D-68159 Mannheim, Germany Matthias Barth 4Institut für Geowissenschaften, Universität Mainz, Becherweg 21, 55128 Mainz, Germany *E-mail: [e-mail]. Publisher: Geological Society of America Received: 15 Jun 2012 Revision Received: 01 Aug 2012 Accepted: 03 Aug 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (2): 163–166. https://doi.org/10.1130/G33751.1 Article history Received: 15 Jun 2012 Revision Received: 01 Aug 2012 Accepted: 03 Aug 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Alexandre Raphael Cabral, Otto Eugster, Michael Brauns, Bernd Lehmann, Delia Rösel, Thomas Zack, Francisco Robério de Abreu, Ernst Pernicka, Matthias Barth; Direct dating of gold by radiogenic helium: Testing the method on gold from Diamantina, Minas Gerais, Brazil. Geology 2013;; 41 (2): 163–166. doi: https://doi.org/10.1130/G33751.1 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 analytical developments have made radiogenic helium (4He) applicable to archeological gold artifacts for age determinations. Here we report the application of the U/Th–4He method to the direct dating of gold from the historically important gold deposit in Diamantina, Minas Gerais, Brazil. The U/Th–4He age of 515 ± 55 Ma for the Diamantina gold is corroborated by a new U/Pb age of 524 ± 16 Ma for rutile recovered from auriferous pockets. These ages tie the Diamantina gold mineralization to the Brasiliano orogenic event, in the context of the Gondwana amalgamation. Our results indicate that U/Th–4He dating of gold is possible, opening new perspectives for the dating of gold deposits without assuming contemporaneity between gold and datable hydrothermal minerals. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.