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Decoupled geochemical behavior of As and Cu in hydrothermal systems

2009; Geological Society of America; Volume: 37; Issue: 8 Linguagem: Inglês

10.1130/g25781a.1

1943-2682

Artur P. Deditius, Satoshi Utsunomiya, Rodney C. Ewing, Stephen Chryssoulis, Deon J. Venter, S. E. Kesler,

earthquake and tectonic studies

Research Article| August 01, 2009 Decoupled geochemical behavior of As and Cu in hydrothermal systems Artur P. Deditius; Artur P. Deditius 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA2Commonwealth Scientific and Industrial Research Organisation (CSIRO), Exploration and Mining, 26 Dick Perry Avenue, Perth, WA 6151, Australia Search for other works by this author on: GSW Google Scholar Satoshi Utsunomiya; Satoshi Utsunomiya 3Kyushu University, Department of Chemistry, Ropponmatsu, 4-2-1, Chuou-ku, Fukuoka-shi 810-8560, Japan Search for other works by this author on: GSW Google Scholar Rodney C. Ewing; Rodney C. Ewing 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA Search for other works by this author on: GSW Google Scholar Stephen L. Chryssoulis; Stephen L. Chryssoulis 4Advanced Mineral Technology Laboratory (AMTEL), 100 Collip Circle, UWO Research Park, London, Ontario N6G 4X8, Canada Search for other works by this author on: GSW Google Scholar Daniela Venter; Daniela Venter 4Advanced Mineral Technology Laboratory (AMTEL), 100 Collip Circle, UWO Research Park, London, Ontario N6G 4X8, Canada Search for other works by this author on: GSW Google Scholar Stephen E. Kesler Stephen E. Kesler 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Artur P. Deditius 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA2Commonwealth Scientific and Industrial Research Organisation (CSIRO), Exploration and Mining, 26 Dick Perry Avenue, Perth, WA 6151, Australia Satoshi Utsunomiya 3Kyushu University, Department of Chemistry, Ropponmatsu, 4-2-1, Chuou-ku, Fukuoka-shi 810-8560, Japan Rodney C. Ewing 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA Stephen L. Chryssoulis 4Advanced Mineral Technology Laboratory (AMTEL), 100 Collip Circle, UWO Research Park, London, Ontario N6G 4X8, Canada Daniela Venter 4Advanced Mineral Technology Laboratory (AMTEL), 100 Collip Circle, UWO Research Park, London, Ontario N6G 4X8, Canada Stephen E. Kesler 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA Publisher: Geological Society of America Received: 30 Dec 2008 Revision Received: 19 Mar 2009 Accepted: 22 Mar 2009 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (8): 707–710. https://doi.org/10.1130/G25781A.1 Article history Received: 30 Dec 2008 Revision Received: 19 Mar 2009 Accepted: 22 Mar 2009 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Artur P. Deditius, Satoshi Utsunomiya, Rodney C. Ewing, Stephen L. Chryssoulis, Daniela Venter, Stephen E. Kesler; Decoupled geochemical behavior of As and Cu in hydrothermal systems. Geology 2009;; 37 (8): 707–710. doi: https://doi.org/10.1130/G25781A.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 Cu-rich and As-rich growth zones in pyrite provide new insights into the composition of late-stage magmatic fluids and their host hydrothermal ore deposits. The pyrite is from the Pueblo Viejo (Dominican Republic) and Yanacocha (Peru) high-sulfidation gold-silver deposits, which are thought to form from hydrothermal systems that interacted with magmatic vapor plumes. Electron microprobe analysis, secondary ion mass spectrometry, and elemental maps show that pyrite, the most common sulfide mineral in both deposits, contains three different types of growth zones: (1) As-rich zones that are enriched in Au, Ag, Sb, Te, and Pb, (2) Cu-rich zones with significantly lower concentrations of these elements, and (3) barren pyrite zones with no other elements. These zones are interpreted to result from mixing between the pyrite-forming fluid and vapors that invaded the main hydrothermal system episodically. Comparison to experimental studies of elemental partitioning and analyses of fumaroles and fluid inclusions from magmatic-hydrothermal systems suggests that the As-rich vapor formed at high and possibly magmatic temperatures, whereas the Cu-rich vapor formed at lower temperatures, possibly during migration of the original magmatic vapor. The presence of finely spaced multiple growth zones in pyrite suggests that the composition of at least high-sulfidation hydrothermal systems can be affected intermittently and repetitively by vapors, probably from underlying magmas. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.