Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Hydrous SiO2 in subducted oceanic crust and H2O transport to the core-mantle boundary

Journal Article · · Earth and Planetary Science Letters
 [1];  [2];  [3];  [3];  [4];  [5];  [2];  [3];  [2]
  1. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China); Carnegie Institution for Science, Washington, DC (United States); Vrije Univ., Amsterdam (Netherlands)
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China)
  3. Carnegie Institution for Science, Washington, DC (United States)
  4. Univ. of Cambridge (United Kingdom)
  5. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China); Univ. of Cambridge (United Kingdom)
Subduction of oceanic lithosphere transports surface H2O into the mantle. Recent studies show that dense SiO2 in the form of stishovite, an abundant mineral in subducted oceanic crust at depths greater than ~270 km, has the potential to host and transport a considerable amount of H2O into the lower mantle, but the H2O storage capacity of SiO2 phases at high pressure and temperature remains uncertain. We investigate the hydration of stishovite and its higher-pressure polymorphs, β-stishovite and seifertite, with in situ X-ray diffraction experiments at high pressures and temperatures. The H2O contents in SiO2 phases are quantified based on observed increases in unit cell volume relative to the anhydrous SiO2 system. Density functional theory (DFT) computations permit calibration of water content as a function of volume change based on interstitial substitution of H2O. Regression of our experimental data indicates an H2O storage capacity in stishovite of ~3.5 wt% in the transition zone and shallow lower mantle, decreasing to about 0.8 wt% at the base of the mantle. We find that SiO2-bearing subducted oceanic crust can accommodate all the H2O in slab lithosphere that survives sub-arc dehydration. Hydration of silica phases in subducted oceanic crust and their unparalleled capacity to host significant amounts of H2O even at high mantle temperatures provides a unique mechanism for transport and storage of water in the deepest mantle.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
Carnegie Institution for Science; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); The Dutch Research Council (NWO); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1909667
Journal Information:
Earth and Planetary Science Letters, Journal Name: Earth and Planetary Science Letters Vol. 594; ISSN 0012-821X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (72)

Dry (Mg,Fe)SiO 3 perovskite in the Earth's lower mantle journal February 2015
Phase transition and equation of state of dense hydrous silica up to 63 GPa: DENSE HYDROUS PURE SILICA journal September 2017
Stability, metastability, and elastic properties of a dense silica polymorph, seifertite: PROPERTIES OF SEIFERTITE journal September 2013
On the mechanisms for H and Al incorporation in stishovite journal October 2006
Subduction of continental crust and terrigenous and pelagic sediments: an experimental study journal September 1994
Composition and mass flux of sediment entering the world's subduction zones: Implications for global sediment budgets, great earthquakes, and volcanism journal May 1996
Hydrothermal alteration of upper oceanic crust formed at a fast-spreading ridge: mineral, chemical, and isotopic evidence from ODP Site 801 journal November 2003
Water partitioning between nominally anhydrous minerals in the MgO–SiO2–H2O system up to 24 GPa: implications for the distribution of water in the Earth's mantle journal November 2000
Mineralogy of subducted basaltic crust (MORB) from 25 to 37 GPa, and chemical heterogeneity of the lower mantle journal July 2001
Water solubility in Mg-perovskites and water storage capacity in the lower mantle journal June 2003
The stability of hydrous silicates in Earth's lower mantle: Experimental constraints from the systems MgO–SiO2–H2O and MgO–Al2O3–SiO2–H2O journal December 2015
Hydrous minerals and the storage of water in the deep mantle journal December 2015
Serpentine and the subduction zone water cycle journal June 2004
Phase relations of peridotites under H2O-saturated conditions and ability of subducting plates for transportation of H2O journal October 2004
High hydrogen solubility in Al-rich stishovite and water transport in the lower mantle journal October 2007
Effects of heterogeneous hydration in the incoming plate, slab rehydration, and mantle wedge hydration on slab-derived H 2 O flux in subduction zones journal November 2012
Stability of a hydrous δ-phase, AlOOH–MgSiO2(OH)2, and a mechanism for water transport into the base of lower mantle journal September 2014
Comparative deep Earth volatile cycles: The case for C recycling from exosphere/mantle fractionation of major (H2O, C, N) volatiles and from H2O/Ce, CO2/Ba, and CO2/Nb exosphere ratios journal November 2018
The role of serpentinites in cycling of carbon and sulfur: Seafloor serpentinization and subduction metamorphism journal September 2013
The Eclogite–Garnetite transformation in the MORB + H2O system journal August 2004
Dehydration and earthquakes in the subducting slab: empirical link in intermediate and deep seismic zones journal August 2004
Internally consistent thermodynamic data set for dense hydrous magnesium silicates up to 35GPa, 1600°C: Implications for water circulation in the Earth's deep mantle journal June 2006
Phase transformations of subducted basaltic crust in the upmost lower mantle journal August 2006
Adiabatic temperature profile in the mantle journal November 2010
Precise determination of post-stishovite phase transition boundary and implications for seismic heterogeneities in the mid-lower mantle journal November 2010
Water in the slab: A trilogy journal February 2014
High concentration of water in stishovite in the MORB system journal January 2002
Stability of CaCl 2 -type and α-PbO 2 -type SiO 2 at high pressure and temperature determined by in-situ X-ray measurements : STABILITY OF CaCl journal March 2003
Transport of water into the lower mantle: Role of stishovite: TRANSPORT OF WATER INTO THE LOWER MANTLE journal January 2003
H 2 O subduction beyond arcs: H 2 O SUBDUCTION BEYOND ARCS journal March 2008
Subduction factory: 4. Depth-dependent flux of H 2 O from subducting slabs worldwide journal January 2011
The mean composition of ocean ridge basalts: MEAN MORB journal March 2013
Water Concentration in Single‐Crystal (Al,Fe)‐Bearing Bridgmanite Grown From the Hydrous Melt: Implications for Dehydration Melting at the Topmost Lower Mantle journal September 2019
High Pressure‐Temperature Study on the Thermal Equations of State of Seifertite andCaCl 2 ‐Type SiO 2 journal December 2019
Slab Transport of Fluids to Deep Focus Earthquake Depths—Thermal Modeling Constraints and Evidence From Diamonds journal May 2021
Constraining the Volume of Earth's Early Oceans With a Temperature‐Dependent Mantle Water Storage Capacity Model journal March 2021
Patterns of deep seismicity reflect buoyancy stresses due to phase transitions journal December 1997
Stability limits of hydrous minerals in sediment and mid-ocean ridge basalt compositions: Implications for water transport in subduction zones journal August 1998
Transformation of stishovite to a denser phase at lower-mantle pressures journal March 1995
Constraints from seismic anisotropy on the nature of the lowermost mantle journal May 1996
Dry mantle transition zone inferred from the conductivity of wadsleyite and ringwoodite journal January 2008
FeO2 and FeOOH under deep lower-mantle conditions and Earth’s oxygen–hydrogen cycles journal June 2016
The pyrite-type high-pressure form of FeOOH journal July 2017
Hydrogen-bearing iron peroxide and the origin of ultralow-velocity zones journal November 2017
Stability of hydrous silicate at high pressures and water transport to the deep lower mantle journal February 2014
Lower-mantle water reservoir implied by the extreme stability of a hydrous aluminosilicate journal December 2014
New developments in high-pressure X-ray diffraction beamline for diamond anvil cell at SPring-8 journal January 2020
Key problems of the four-dimensional Earth system journal May 2020
Role of hydrogen and proton transportation in Earth’s deep mantle journal November 2021
Toward an internally consistent pressure scale journal May 2007
Ultrahydrous stishovite from high-pressure hydrothermal treatment of SiO2 journal December 2011
Metallic iron limits silicate hydration in Earth’s transition zone journal October 2019
Evidence for the stability of ultrahydrous stishovite in Earth’s lower mantle journal December 2019
Large H 2 O solubility in dense silica and its implications for the interiors of water-rich planets journal April 2020
DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration journal May 2015
Double-sided laser heating system at HPCAT for in situ x-ray diffraction at high pressures and high temperatures journal June 2006
Water transport to the core–mantle boundary journal January 2021
When water meets iron at Earth's core–mantle boundary journal September 2017
Equation of state of ice VII up to 106 GPa journal September 1997
Water in Earth's Lower Mantle journal March 2002
Hydrogen in Stishovite, with Implications for Mantle Water Content journal August 1993
Seismic Evidence for Partial Melt at the Base of Earth's Mantle journal September 1996
Synthesis of FeH 5 : A layered structure with atomic hydrogen slabs journal July 2017
Petrology of Subducted Slabs journal May 2002
WATER, MELTING, AND THE DEEP EARTH H 2 O CYCLE journal May 2006
First principles methods using CASTEP journal January 2005
The high-pressure synthesis of lawsonite in the MORB+H2O system journal March 1999
Equation of state of stishovite to lower mantle pressures journal February 2003
Iron-titanium oxyhydroxides as water carriers in the Earth’s deep mantle journal April 2016
Formation of hydrous stishovite from coesite in high-pressure hydrothermal environments journal November 2016
Raman spectroscopy of water-rich stishovite and dense high-pressure silica up to 55 GPa journal November 2017
Equations of state and phase boundary for stishovite and CaCl2-type SiO2 journal May 2018

Similar Records

Evidence for the stability of ultrahydrous stishovite in Earth’s lower mantle
Journal Article · Sun Dec 15 19:00:00 EST 2019 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1755916

Transport of water into the lower mantle: Role of stishovite
Journal Article · Tue Nov 30 23:00:00 EST 2010 · J. Geophys. Res. · OSTI ID:1008781

Phase transition and equation of state of dense hydrous silica up to 63 GPa
Journal Article · Mon Jul 31 20:00:00 EDT 2017 · Journal of Geophysical Research. Solid Earth · OSTI ID:1409086