Title: Composition and evolution of ore fluids in a magmatic-hydrothermal skarn deposit
Abstract: Research Article| February 01, 2004 Composition and evolution of ore fluids in a magmatic-hydrothermal skarn deposit Timothy Baker; Timothy Baker 1Economic Geology Research Unit, School of Earth Sciences, James Cook University, Townsville, Queensland 4812, Australia Search for other works by this author on: GSW Google Scholar Esme Van Achterberg; Esme Van Achterberg 2Commonwealth Scientific and Industrial Research Organisation, Exploration and Mining, P.O. Box 136, North Ryde, New South Wales 2113, Australia Search for other works by this author on: GSW Google Scholar Chris G. Ryan; Chris G. Ryan 2Commonwealth Scientific and Industrial Research Organisation, Exploration and Mining, P.O. Box 136, North Ryde, New South Wales 2113, Australia Search for other works by this author on: GSW Google Scholar James R. Lang James R. Lang 3Lang Geoscience, 10556 Suncrest Drive, Delta, British Columbia V4C 2N5, Canada Search for other works by this author on: GSW Google Scholar Geology (2004) 32 (2): 117–120. https://doi.org/10.1130/G19950.1 Article history received: 07 Jul 2003 rev-recd: 15 Oct 2003 accepted: 17 Oct 2003 first online: 03 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 Timothy Baker, Esme Van Achterberg, Chris G. Ryan, James R. Lang; Composition and evolution of ore fluids in a magmatic-hydrothermal skarn deposit. Geology 2004;; 32 (2): 117–120. doi: https://doi.org/10.1130/G19950.1 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 The chemistry of brine, vapor, and low-salinity fluid inclusions measured by proton-induced X-ray emission from the Bismark skarn deposit, Mexico, is consistent with an evolving magmatic-hydrothermal system with no evidence for external fluid inputs. The results support a model that invokes early phase separation of magmatic fluids into brine and vapor (two-phase field) at high temperature and lithostatic pressure, followed by the entrapment of a low-salinity magmatic fluid (one-phase field) at lower temperature and hydrostatic pressure. The early brine and vapor inclusions contain high Pb and Zn concentrations and low Cu; however, the vapor contains significantly more Cu than the brine and was likely transported as a sulfur complex. The fluid phase changes observed and behavior of Cu are comparable to those of porphyry Cu systems. The later, low-salinity fluid at Bismark represents a distinct pulse of magmatic fluid with a high K/Ca ratio in which base metals, including Cu, were transported by chloride complexes. Paragenetic relationships and variations in the relative concentrations of Cu, Pb, and Zn suggest that this fluid was primarily responsible for ore deposition. The relative Cu, Pb, and Zn concentrations in fluid inclusions at Bismark are consistent with those measured from base-metal ores in high-temperature carbonate- replacement deposits throughout Mexico, and suggest that the bulk-metal budget of these deposits is primarily controlled by magmatic-hydrothermal fluids deficient in Cu. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 178
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