Artikel
Lizenziert
Nicht lizenziert
Erfordert eine Authentifizierung
In-situ measurements of fluorine and chlorine speciation and partitioning between melts and aqueous fluids in the Na2O-Al2O3-SiO2-H2O system
-
Celia Dalou
,
Bjorn O. Mysen
Veröffentlicht/Copyright:
10. Januar 2015
Abstract
The effect of pressure and temperature on the structure of silicate melts coexisting with silicasaturated aqueous electrolyte fluids enriched in fluorine or chlorine in the Na2O-Al2O3-SiO2-H2O system has been described. In situ measurements were conducted with the samples at desired temperatures and pressures in a hydrothermal diamond-anvil cell (HDAC) by using microRaman and FTIR spectroscopy techniques. The data were acquired at temperatures and pressures up to 800 °C and 1264 MPa, respectively.
In silicate melts, the intensity of the infrared bands assigned to the stretch vibration of OH-groups is smaller than those of coexisting molecular H2O when F and Cl are present in the melt structure. This difference reflects the interaction of F or Cl with H2O in the melts. With decreasing pressure and temperature (P-T) conditions, SiF complexes are favored in the melt over that in coexisting fluid, perhaps because of decreasing silicate concentration in fluids with decreasing temperature and pressure. In these melts, the solubility of Cl, likely in the form of NaCl, increases with decreasing P-T conditions, whereas the abundance of such complexes in coexisting fluids decreases in favor of HCl.
Our experimental data were employed to model the ascent of a fluid-saturated magma from the upper mantle to the shallow crust. This modeling offers insights into F and Cl partitioning between and the speciation of F and Cl in melts and magmatic fluids. We suggest that the formation of stable SiF and NaCl complexes and their increasing solubilities in silicate melts during magma ascent may explain the late volcanic degassing of F and Cl compared with the degassing behavior of other volatile species.
Keywords: Fluorine; chlorine; speciation; aqueous fluids; hydrous melts; structure; spectroscopy; hydrothermal diamond-anvil cell
Received: 2013-12-30
Accepted: 2014-6-16
Published Online: 2015-1-10
Published in Print: 2015-1-1
© 2015 by Walter de Gruyter Berlin/Boston
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Artikel in diesem Heft
- The American Mineralogist at 100 years, and a mineralogy renaissance
- At the blurry edge of mineralogy
- Mineral evolution and Earth history
- Franciscan geologic history constrained by tectonic/olistostromal high-grade metamafic blocks in the iconic California Mesozoic-Cenozoic accretionary complex
- The rapid expansion of environmental mineralogy in unconventional ways: Beyond the accepted definition of a mineral, the latest technology, and using nature as our guide
- Microelectronic junctions in arsenian pyrite due to impurity and mixed sulfide heterogeneity
- The structure of water-saturated carbonate melts
- In-situ measurements of fluorine and chlorine speciation and partitioning between melts and aqueous fluids in the Na2O-Al2O3-SiO2-H2O system
- High-pressure high-temperature transitions in MgCr2O4 and crystal structures of new Mg2Cr2O5 and post-spinel MgCr2O4 phases with implications for ultrahigh-pressure chromitites in ophiolites
- Mid-infrared emission spectroscopy and visible/near-infrared reflectance spectroscopy of Fe-sulfate minerals
- Megacrystic zircon with planar fractures in miaskite-type nepheline pegmatites formed at high pressures in the lower crust (Ivrea Zone, southern Alps, Switzerland)
- Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, U.S.A.)
- Applications of Hirshfeld surfaces to mineralogy: An example of alumohydrocalcite, and the classification of the dundasite group minerals
- Optical absorption anisotropy of high-density, wide-gap, high-hardness SiO2 polymorphs seifertite, stishovite, and coesite
- The system Na2CO3-FeCO3 at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3
- Chlorine-hydroxyl diffusion in pargasitic amphibole
- The use of cation-cation and anion-anion bonds to augment the bond-valence model
- AIM analysis and the form of the bond-valence equation
- Atomistic simulation on mixing thermodynamics of calcite-smithsonite solid solutions
- Combined geochemistry and geochronology constrains coupled subduction of oceanic and continental crust in the Huwan shear zone, central China
- Near-infrared investigation of folding sepiolite
- First-principles study of sulfur isotope fractionation in pyrite-type disulfides
- Tetrataenite in terrestrial rock
- Thermo-compression of pyrope-grossular garnet solid solutions: Non-linear compositional dependence
- Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900–1450 °C
- Trace-element partitioning between plagioclase, alkali feldspar, Ti-magnetite, biotite, apatite, and evolved potassic liquids from Campi Flegrei (Southern Italy)
- Synthetic and natural ammonium-bearing tourmaline
- Anhydrite stability and the effect of Ca on the behavior of sulfur in felsic magmas
- Nuragheite, Th(MoO4)2·H2O, The Second Natural Thorium Molybdate And Its Relationships To Ichnusaite And Synthetic Th(MoO4)2†
- Structural Effects On Incorporated Water In Carbonated Apatites
- New Constraints On Electron-Beam Induced Halogen Migration In Apatite
- Origin Of The Lunar Highlands Mg-Suite: An Integrated Petrology, Geochemistry, Chronology, And Remote Sensing Perspective
- An In Situ High-Pressure Nmr Study Of Sodium Coordination Environment Compressibility In Albite Glass
- Hydrothermal Synthesis And Crystal Structure Of Also4(Oh): A Titanite-Group Member
- New Mineral Names
- Book Review: Thermal Remote Sensing Of Active Volcanoes: A User’S Manual
Schlagwörter für diesen Artikel
Fluorine;
chlorine;
speciation;
aqueous fluids;
hydrous melts;
structure;
spectroscopy;
hydrothermal diamond-anvil cell
Artikel in diesem Heft
- The American Mineralogist at 100 years, and a mineralogy renaissance
- At the blurry edge of mineralogy
- Mineral evolution and Earth history
- Franciscan geologic history constrained by tectonic/olistostromal high-grade metamafic blocks in the iconic California Mesozoic-Cenozoic accretionary complex
- The rapid expansion of environmental mineralogy in unconventional ways: Beyond the accepted definition of a mineral, the latest technology, and using nature as our guide
- Microelectronic junctions in arsenian pyrite due to impurity and mixed sulfide heterogeneity
- The structure of water-saturated carbonate melts
- In-situ measurements of fluorine and chlorine speciation and partitioning between melts and aqueous fluids in the Na2O-Al2O3-SiO2-H2O system
- High-pressure high-temperature transitions in MgCr2O4 and crystal structures of new Mg2Cr2O5 and post-spinel MgCr2O4 phases with implications for ultrahigh-pressure chromitites in ophiolites
- Mid-infrared emission spectroscopy and visible/near-infrared reflectance spectroscopy of Fe-sulfate minerals
- Megacrystic zircon with planar fractures in miaskite-type nepheline pegmatites formed at high pressures in the lower crust (Ivrea Zone, southern Alps, Switzerland)
- Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, U.S.A.)
- Applications of Hirshfeld surfaces to mineralogy: An example of alumohydrocalcite, and the classification of the dundasite group minerals
- Optical absorption anisotropy of high-density, wide-gap, high-hardness SiO2 polymorphs seifertite, stishovite, and coesite
- The system Na2CO3-FeCO3 at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3
- Chlorine-hydroxyl diffusion in pargasitic amphibole
- The use of cation-cation and anion-anion bonds to augment the bond-valence model
- AIM analysis and the form of the bond-valence equation
- Atomistic simulation on mixing thermodynamics of calcite-smithsonite solid solutions
- Combined geochemistry and geochronology constrains coupled subduction of oceanic and continental crust in the Huwan shear zone, central China
- Near-infrared investigation of folding sepiolite
- First-principles study of sulfur isotope fractionation in pyrite-type disulfides
- Tetrataenite in terrestrial rock
- Thermo-compression of pyrope-grossular garnet solid solutions: Non-linear compositional dependence
- Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900–1450 °C
- Trace-element partitioning between plagioclase, alkali feldspar, Ti-magnetite, biotite, apatite, and evolved potassic liquids from Campi Flegrei (Southern Italy)
- Synthetic and natural ammonium-bearing tourmaline
- Anhydrite stability and the effect of Ca on the behavior of sulfur in felsic magmas
- Nuragheite, Th(MoO4)2·H2O, The Second Natural Thorium Molybdate And Its Relationships To Ichnusaite And Synthetic Th(MoO4)2†
- Structural Effects On Incorporated Water In Carbonated Apatites
- New Constraints On Electron-Beam Induced Halogen Migration In Apatite
- Origin Of The Lunar Highlands Mg-Suite: An Integrated Petrology, Geochemistry, Chronology, And Remote Sensing Perspective
- An In Situ High-Pressure Nmr Study Of Sodium Coordination Environment Compressibility In Albite Glass
- Hydrothermal Synthesis And Crystal Structure Of Also4(Oh): A Titanite-Group Member
- New Mineral Names
- Book Review: Thermal Remote Sensing Of Active Volcanoes: A User’S Manual
