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LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE

2014; Volume: 110; Issue: 1 Linguagem: Inglês

10.2113/econgeo.110.1.263

1554-0774

Alexandre Raphael Cabral, Armin Zeh, H. F. Galbiatti, Bernd Lehmann,

Mineralogy and Gemology Studies

Research Article| January 01, 2015 LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE Alexandre Raphael Cabral; Alexandre Raphael Cabral † 1Lagerstätten und Rohstoffe, Technische Universität Clausthal, Adolph-Roemer-Str. 2A D-38678, Clausthal-Zellerfeld, Germany †Corresponding author: e-mail, alexandre.cabral@tu-clausthal.de Search for other works by this author on: GSW Google Scholar Armin Zeh; Armin Zeh 2Institut für Geowissenschaften, Facheinheit Mineralogie, Goethe-Universität Frankfurt, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany Search for other works by this author on: GSW Google Scholar Henry Francisco Galbiatti; Henry Francisco Galbiatti 3Gerência de Exploração de Ferrosos, Vale, Miguelão, 34000-000 Nova Lima-MG, Brazil Search for other works by this author on: GSW Google Scholar Bernd Lehmann Bernd Lehmann 1Lagerstätten und Rohstoffe, Technische Universität Clausthal, Adolph-Roemer-Str. 2A D-38678, Clausthal-Zellerfeld, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Alexandre Raphael Cabral † 1Lagerstätten und Rohstoffe, Technische Universität Clausthal, Adolph-Roemer-Str. 2A D-38678, Clausthal-Zellerfeld, Germany Armin Zeh 2Institut für Geowissenschaften, Facheinheit Mineralogie, Goethe-Universität Frankfurt, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany Henry Francisco Galbiatti 3Gerência de Exploração de Ferrosos, Vale, Miguelão, 34000-000 Nova Lima-MG, Brazil Bernd Lehmann 1Lagerstätten und Rohstoffe, Technische Universität Clausthal, Adolph-Roemer-Str. 2A D-38678, Clausthal-Zellerfeld, Germany †Corresponding author: e-mail, alexandre.cabral@tu-clausthal.de Publisher: Society of Economic Geologists Received: 19 Nov 2013 Accepted: 01 Apr 2014 First Online: 09 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 © 2015 Society of Economic Geologists. Economic Geology (2015) 110 (1): 263–272. https://doi.org/10.2113/econgeo.110.1.263 Article history Received: 19 Nov 2013 Accepted: 01 Apr 2014 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, Armin Zeh, Henry Francisco Galbiatti, Bernd Lehmann; LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE. Economic Geology 2015;; 110 (1): 263–272. doi: https://doi.org/10.2113/econgeo.110.1.263 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 SocietyEconomic Geology Search Advanced Search Abstract Bonanza-style mineralization of palladiferous gold in specular hematite-rich lodes engendered the most important gold rush in Brazilian history, which took place at the end of the seventeenth century in the province that became known as Minas Gerais. The timing of this itabirite-hosted vein mineralization, locally referred to as jacutinga, is controversial; different views have ascribed jacutinga to one of the two orogenic events recorded in the Quadrilátero Ferrífero of Minas Gerais, the ~2.0 Ga Transamazonian event and the ~0.6 Ga Brasiliano event. This controversy is due mainly to the absence of reliable age data for hydrothermal minerals. Here we report the first U-Pb age for a jacutinga lode, obtained by laser ablation-sector field-inductively coupled plasma-mass spectrometry (LA-SF-ICP-MS) on monazite grains recovered from the Conceição Fe-ore deposit within the Itabira district. The monazite analyses yield a precise Late Cambrian age of 495.6 ± 2.2 Ma, which is well within the time period between ca. 524 and 444 Ma, suggested by recently published geochronologic data on regionally distributed similar hydrothermal systems. The age of 496 Ma for the jacutinga monazite corroborates an orogen-scale hydrothermal overprint at later stages of the Brasiliano event. This hydrothermal overprint also affected surrounding Neoarchean rocks of the Minas Supergroup, as well as younger rocks of the southern Serra do Espinhaço, along the platiniferous Au-Pd belt of Minas Gerais. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.