Lead and bromine enrichment in eclogite-facies fluids: Extreme fractionation during lower-crustal hydration

Abstract

Research Article| May 01, 1999 Lead and bromine enrichment in eclogite-facies fluids: Extreme fractionation during lower-crustal hydration Henrik Svensen; Henrik Svensen 1Department of Geology, University of Oslo, Box 1047 Blindern, N-0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Bjørn Jamtveit; Bjørn Jamtveit 1Department of Geology, University of Oslo, Box 1047 Blindern, N-0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Bruce Yardley; Bruce Yardley 2School of Earth Sciences, University of Leeds, Leeds LS2 9JT, UK Search for other works by this author on: GSW Google Scholar Ane K. Engvik; Ane K. Engvik 3Mineralogical-Geological Museum, University of Oslo, N-0562 Oslo, Norway Search for other works by this author on: GSW Google Scholar Håkon Austrheim; Håkon Austrheim 3Mineralogical-Geological Museum, University of Oslo, N-0562 Oslo, Norway Search for other works by this author on: GSW Google Scholar Curt Broman Curt Broman 4Department of Geology and Geochemistry, University of Stockholm, SE-106 91 Stockholm, Sweden Search for other works by this author on: GSW Google Scholar Author and Article Information Henrik Svensen 1Department of Geology, University of Oslo, Box 1047 Blindern, N-0316 Oslo, Norway Bjørn Jamtveit 1Department of Geology, University of Oslo, Box 1047 Blindern, N-0316 Oslo, Norway Bruce Yardley 2School of Earth Sciences, University of Leeds, Leeds LS2 9JT, UK Ane K. Engvik 3Mineralogical-Geological Museum, University of Oslo, N-0562 Oslo, Norway Håkon Austrheim 3Mineralogical-Geological Museum, University of Oslo, N-0562 Oslo, Norway Curt Broman 4Department of Geology and Geochemistry, University of Stockholm, SE-106 91 Stockholm, Sweden Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (5): 467–470. https://doi.org/10.1130/0091-7613(1999)027<0467:LABEIE>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Henrik Svensen, Bjørn Jamtveit, Bruce Yardley, Ane K. Engvik, Håkon Austrheim, Curt Broman; Lead and bromine enrichment in eclogite-facies fluids: Extreme fractionation during lower-crustal hydration. Geology 1999;; 27 (5): 467–470. doi: https://doi.org/10.1130/0091-7613(1999)027<0467:LABEIE>2.3.CO;2 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 Hydration reactions associated with eclogite-facies metamorphism of granulites in the Norwegian Caledonides led to the formation of saline brines with exceptional compositions. Primary omphacite- and garnet-hosted fluid inclusions from Norwegian eclogites formed by hydration of granulites contain a plethora of solid phases. A total of 18 different minerals have been identified in multiphase brines, and 12 of these occur at the Bådsholmen locality in Sunnfjord. Fluid inclusions from this locality are characterized by a high Br/Cl mass ratio (0.03) and extreme Pb enrichment as demonstrated by the presence of Pb-bearing daughter minerals including galena, a Pb-Cl–bearing phase, and a Pb-Cl-Br–bearing phase. The fluid compositions may reflect enrichment of elements incompatible with the silicate structure during consumption of H2O by eclogite-forming hydration reactions. Pb is believed to have been scavenged from the parent granulite by the increasingly saline brine during K-feldspar breakdown. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.