Home Evolution of mineral compositions during eclogitization of subducting basaltic crust
Article
Licensed
Unlicensed Requires Authentication

Evolution of mineral compositions during eclogitization of subducting basaltic crust

  • Juliette F. Forneris EMAIL logo and John R. Holloway
Published/Copyright: March 28, 2015
Become an author with De Gruyter Brill
Author Information
American Mineralogist
From the journal American Mineralogist Volume 89 Issue 10

Abstract

Experiments performed on the basalt + H2O system at 2.2 to 3.4 GPa and 625 to 750 °C demonstrate the importance of amphibole, zoisite/clinozoisite, and lawsonite as H2O carriers in subducting oceanic crust. Amphiboles are sodic-calcic (barroisite) at low pressures (2.2 and 2.4 GPa) but become sodic (glaucophane-ferroglaucophane) with increasing pressure. Zoisite/clinozoisite and lawsonite vary little in composition over this P-T range. Garnet and clinopyroxene compositions respond to the progressive disappearance of amphibole and zoisite with increasing pressure.

H2O contents of eclogitic assemblages based on modal abundances calculated from electron microprobe analyses were combined with recent results from thermal modeling of subduction zones to discuss fluid release from the slab. The results indicate that, for cold subduction zones, the basaltic crust does not dehydrate, and lawsonite transports H2O to depths greater than 250 km. For intermediate temperature paths, the destabilization of lawsonite will trigger the release of 0.9 wt% H2O at ∼110 km, within the sub-arc region. The remaining 0.1 wt% H2O is transported by phengite to depths greater than 300 km. In hot subduction zones, the H2O-saturated basalt solidus is crossed, and partial melting of the crust leads to the generation of “adakite” type melts.

Received: 2003-5-31
Accepted: 2004-4-29
Published Online: 2015-3-28
Published in Print: 2004-10-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. The origin of the color of pearls in iridescence from nano-composite structures of the nacre
  2. “Invisible„ gold revealed: Direct imaging of gold nanoparticles in a Carlin-type deposit
  3. Behavior of cation vacancy in kenotetrahedral Cr-spinels from Albanian eastern belt ophiolites
  4. Displacement and strain fields around a [100] dislocation in olivine measured to sub-angstrom accuracy
  5. Kiglapait mineralogy IV: The augite series
  6. Metasomatic formation of kosmochlor-bearing diopside in peridotite xenoliths from North Island, New Zealand
  7. Determination of standard thermodynamic properties of sulfides in the Ag-Au-S system by means of a solid-state galvanic cell
  8. Hydroxyl ordering in igneous apatite
  9. Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study of crystals synthesized at 2–4 GPa
  10. Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relations in the Mg2SiO4-SiO2-H2O system
  11. The activity of silica, water, and the equilibration of intermediate and silicic magmas
  12. The CO2–H2O system: IV. Empirical, isothermal equations for representing vapor-liquid equilibria at 110–350 °C, P ≤ 150 MPa
  13. Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses
  14. The crystal-structure of synthetic NaNa2Mg5Si8O21(OH)3, a triclinic C1̄ amphibole with a triple-cell and excess hydrogen
  15. High-pressure phase transitions in Ca0.2Sr0.8Al2Si2O8feldspar
  16. Phase transition of Ca-perovskite and stability of Al-bearing Mg-perovskite in the lower mantle
  17. Mineralogy and petrology of a mullite-bearing pseudotachylyte: Constraints on the temperature of coseismic frictional fusion
  18. New developments in two-feldspar thermometry
  19. Ordered distribution of Au and Ag in the crystal structure of muthmannite, AuAgTe2, a rare telluride from Sacarîmb, western Romania
  20. Polytypism of cookeite in low-grade metapelites of the Cameros Basin, Spain: Lack of correlation of well-ordered polytypes with pressure
  21. Evolution of mineral compositions during eclogitization of subducting basaltic crust
  22. Mass balance during retrogression of eclogite-facies minerals in the Rongcheng eclogite, eastern Sulu ultrahigh-pressure terrane, China
  23. Synthesis of REE and Y phosphates by Pb-free flux methods and their utilization as standards for electron microprobe analysis and in design of monazite chemical U-Th-Pb dating protocol
  24. The chemistry and crystal structure of okanoganite-(Y) and comparison with vicanite-(Ce)
  25. An automated system for phase identification and quantitative composition determination using the electron microprobe: Theory and applications
  26. Piston-cylinder calibration at 400 to 500 MPa: A comparison of using water solubility in albite melt and NaCl melting
  27. Letter. Comparative planetary mineralogy: V/(Cr + Al) systematics in chromite as an indicator of relative oxygen fugacity
  28. Letter. Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(⃞,Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation
https://doi.org/10.2138/am-2004-1021

Articles in the same Issue

  1. The origin of the color of pearls in iridescence from nano-composite structures of the nacre
  2. “Invisible„ gold revealed: Direct imaging of gold nanoparticles in a Carlin-type deposit
  3. Behavior of cation vacancy in kenotetrahedral Cr-spinels from Albanian eastern belt ophiolites
  4. Displacement and strain fields around a [100] dislocation in olivine measured to sub-angstrom accuracy
  5. Kiglapait mineralogy IV: The augite series
  6. Metasomatic formation of kosmochlor-bearing diopside in peridotite xenoliths from North Island, New Zealand
  7. Determination of standard thermodynamic properties of sulfides in the Ag-Au-S system by means of a solid-state galvanic cell
  8. Hydroxyl ordering in igneous apatite
  9. Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study of crystals synthesized at 2–4 GPa
  10. Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relations in the Mg2SiO4-SiO2-H2O system
  11. The activity of silica, water, and the equilibration of intermediate and silicic magmas
  12. The CO2–H2O system: IV. Empirical, isothermal equations for representing vapor-liquid equilibria at 110–350 °C, P ≤ 150 MPa
  13. Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses
  14. The crystal-structure of synthetic NaNa2Mg5Si8O21(OH)3, a triclinic C1̄ amphibole with a triple-cell and excess hydrogen
  15. High-pressure phase transitions in Ca0.2Sr0.8Al2Si2O8feldspar
  16. Phase transition of Ca-perovskite and stability of Al-bearing Mg-perovskite in the lower mantle
  17. Mineralogy and petrology of a mullite-bearing pseudotachylyte: Constraints on the temperature of coseismic frictional fusion
  18. New developments in two-feldspar thermometry
  19. Ordered distribution of Au and Ag in the crystal structure of muthmannite, AuAgTe2, a rare telluride from Sacarîmb, western Romania
  20. Polytypism of cookeite in low-grade metapelites of the Cameros Basin, Spain: Lack of correlation of well-ordered polytypes with pressure
  21. Evolution of mineral compositions during eclogitization of subducting basaltic crust
  22. Mass balance during retrogression of eclogite-facies minerals in the Rongcheng eclogite, eastern Sulu ultrahigh-pressure terrane, China
  23. Synthesis of REE and Y phosphates by Pb-free flux methods and their utilization as standards for electron microprobe analysis and in design of monazite chemical U-Th-Pb dating protocol
  24. The chemistry and crystal structure of okanoganite-(Y) and comparison with vicanite-(Ce)
  25. An automated system for phase identification and quantitative composition determination using the electron microprobe: Theory and applications
  26. Piston-cylinder calibration at 400 to 500 MPa: A comparison of using water solubility in albite melt and NaCl melting
  27. Letter. Comparative planetary mineralogy: V/(Cr + Al) systematics in chromite as an indicator of relative oxygen fugacity
  28. Letter. Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(⃞,Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2025 De Gruyter Brill
Downloaded on 29.9.2025 from https://www.degruyterbrill.com/document/doi/10.2138/am-2004-1021/html
Scroll to top button