Neoarchean and Paleoproterozoic Iron Oxide-Copper-Gold Events at the Sossego Deposit, Carajas Province, Brazil: Re-Os and U-Pb Geochronological Evidence

Abstract

Research Article| May 01, 2015 Neoarchean and Paleoproterozoic Iron Oxide-Copper-Gold Events at the Sossego Deposit, Carajás Province, Brazil: Re-Os and U-Pb Geochronological Evidence* C. P. N. Moreto; C. P. N. Moreto 1Institute of Geosciences, University of Campinas, Campinas, São Paulo, 13083-870, Brazil Search for other works by this author on: GSW Google Scholar L. V. S. Monteiro; L. V. S. Monteiro † 2Institute of Geosciences, University of São Paulo, São Paulo 05508-080, Brazil †Corresponding author: e-mail, lena.monteiro@usp.br Search for other works by this author on: GSW Google Scholar R. P. Xavier; R. P. Xavier 1Institute of Geosciences, University of Campinas, Campinas, São Paulo, 13083-870, Brazil Search for other works by this author on: GSW Google Scholar R. A. Creaser; R. A. Creaser 3Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar S. A. DuFrane; S. A. DuFrane 3Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada Search for other works by this author on: GSW Google Scholar C. C. G. Tassinari; C. C. G. Tassinari 2Institute of Geosciences, University of São Paulo, São Paulo 05508-080, Brazil Search for other works by this author on: GSW Google Scholar K. Sato; K. Sato 2Institute of Geosciences, University of São Paulo, São Paulo 05508-080, Brazil Search for other works by this author on: GSW Google Scholar A. I. S. Kemp; A. I. S. Kemp 4Centre for Exploration Target, University of Western Australia, Perth 6009, Australia Search for other works by this author on: GSW Google Scholar W. S. Amaral W. S. Amaral 1Institute of Geosciences, University of Campinas, Campinas, São Paulo, 13083-870, Brazil Search for other works by this author on: GSW Google Scholar Economic Geology (2015) 110 (3): 809–835. https://doi.org/10.2113/econgeo.110.3.809 Article history received: 21 Sep 2013 accepted: 06 Aug 2014 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C. P. N. Moreto, L. V. S. Monteiro, R. P. Xavier, R. A. Creaser, S. A. DuFrane, C. C. G. Tassinari, K. Sato, A. I. S. Kemp, W. S. Amaral; Neoarchean and Paleoproterozoic Iron Oxide-Copper-Gold Events at the Sossego Deposit, Carajás Province, Brazil: Re-Os and U-Pb Geochronological Evidence. Economic Geology 2015;; 110 (3): 809–835. doi: https://doi.org/10.2113/econgeo.110.3.809 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 The Sossego iron oxide-copper-gold (IOCG) deposit is situated within the WNW-ESE-trending Canaã shear zone in the southern Copper belt, Carajás province, Brazil. The Sossego deposit consists of two major groups of orebodies (Sequeirinho-Pista-Baiano and Sossego-Curral). The Sequeirinho-Pista-Baiano orebodies are characterized by deep-emplaced magnetite-(apatite) and albite-actinolite-rich zones, whereas the Sossego-Curral orebodies have predominant potassic and chlorite alteration typical of shallow crustal levels. U-Pb (SHRIMP IIe and LA-ICPMS) geochronology on host rocks reveals Mesoarchean (3.08 Ga Xingu Complex, ca. 2.99 Ga Sequeirinho Granite and 2.97 Ga Pista felsic metavolcanic rock) and bimodal Neoarchean (ca. 2.74 Ga Sossego granophyric granite, Curral Granite and gabbronorite) units. Dating of hydrothermal monazite (U-Pb LA-MC-ICPMS) and molybdenite (Re-Os NTIMS) of the Sequeirinho-Pista orebodies rendered ages of ca. 2.71 to 2.68 Ga, while ore-related monazite of the Sossego-Curral orebodies yielded ages of ca. 1.90 to 1.88 Ga. The Neoarchean IOCG-forming events reflect coupling of ductile sinistral transpression with NNE–directed oblique shortening and Neoarchean magmatism (ca. 2.7 Ga). The shallow-emplaced Paleoproterozoic system, formed after progressive exhumation of the deep-emplaced Neoarchean IOCG deposits, coincides in age with the emplacement of 1.88 Ga A-type granites: the latter may have caused regional circulation of magmatic and externally derived fluids along crustal discontinuities, favoring copper-gold ore deposition as well as metallogenic diversity in the Carajás province (e.g., Sn, W, Au-Pd-Pt deposits). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.