The Role of Redox on Bridgmanite Crystal Chemistry and Calcium Speciation in the Lower Mantle

Creasy, Neala; Girard, Jennifer; Eckert, James O.; Lee, Kanani M.

doi:10.1029/2020jb020783

The Role of Redox on Bridgmanite Crystal Chemistry and Calcium Speciation in the Lower Mantle

Journal Article · Wed Sep 30 00:00:00 EDT 2020 · Journal of Geophysical Research. Solid Earth

DOI:https://doi.org/10.1029/2020jb020783· OSTI ID:1775041

^[1]; Girard, Jennifer ^[2]; Eckert, James O. ^[2]; ^[3]

Yale Univ., New Haven, CT (United States); Colorado School of Mines, Golden, CO (United States)
Yale Univ., New Haven, CT (United States)
Yale Univ., New Haven, CT (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The amount of ferric iron Fe³⁺ in the lower mantle is largely unknown and may be influenced by the disproportionation reaction of ferrous iron Fe²⁺ into metallic Fe and Fe³⁺ triggered by the formation of bridgmanite. Recent work has shown that Fe³⁺ has a strong effect on the density and seismic wave speeds of bridgmanite and the incorporation of impurities such as aluminum. In order to further investigate the effects of ferric iron on mineral behavior at lower mantle conditions, here we conducted laser-heated diamond-anvil cell (LHDAC) experiments on two sets of samples nearly identical in composition (an aluminum-rich pyroxenite glass) except for the Fe³⁺ content; with one sample with more Fe³⁺ (“oxidized”: Fe³⁺/ΣFe ~ 55%) and the other with less Fe³⁺ (“reduced”: Fe³⁺/ΣFe ~ 11%). We heated the samples to lower mantle conditions, and the resulting assemblages were drastically different between the two sets of samples. For the reduced composition, we observed a multiphase assemblage dominated by bridgmanite and calcium perovskite. In contrast, the oxidized material yielded a single phase of Ca-bearing bridgmanite. These Al-rich pyroxenite samples show a difference in density and seismic velocities for these two redox states, where the reduced assemblage is denser than the oxidized assemblage by ~1.5% at the bottom of the lower mantle and slower (bulk sound speed) by ~2%. Thus, heterogeneities of Fe³⁺ content may lead to density and seismic wave speed heterogeneities in Earth's lower mantle.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1775041

Alternate ID(s):: OSTI ID: 1786776
OSTI ID: 1691524

Report Number(s):: LLNL-JRNL--806201; 1009919

Journal Information:: Journal of Geophysical Research. Solid Earth, Journal Name: Journal of Geophysical Research. Solid Earth Journal Issue: 10 Vol. 125; ISSN 2169-9313

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

References (65)

BurnMan: A lower mantle mineral physics toolkit Cottaar, Sanne; Heister, Timo; Rose, Ian Geochemistry, Geophysics, Geosystems, Vol. 15, Issue 4 https://doi.org/10.1002/2013GC005122	journal	April 2014
Pyroxenite causes fat plumes and stagnant slabs: Pyroxenite Fat Plumes and Stagnant Slabs Adam, Claudia; Caddick, Mark J.; King, Scott D. Geophysical Research Letters, Vol. 44, Issue 10 https://doi.org/10.1002/2017GL072943	journal	May 2017
Mössbauer and ELNES spectroscopy of (Mg,Fe)(Si,Al)O3 perovskite: a highly oxidised component of the lower mantle Lauterbach, S.; McCammon, C. A.; van Aken, P. Contributions to Mineralogy and Petrology, Vol. 138, Issue 1 https://doi.org/10.1007/PL00007658	journal	January 2000
Solid solution behaviour of CaSiO3 and MgSiO3 perovskites Jung, Daniel Y.; Schmidt, Max W. Physics and Chemistry of Minerals, Vol. 38, Issue 4 https://doi.org/10.1007/s00269-010-0405-0	journal	October 2010
The composition of the Earth McDonough, W. F.; Sun, S. -s. Chemical Geology, Vol. 120, Issue 3-4 https://doi.org/10.1016/0009-2541(94)00140-4	journal	March 1995
Synthesis of majorite and other high pressure garnets and perovskites Ringwood, A.; Major, A. Earth and Planetary Science Letters, Vol. 12, Issue 4 https://doi.org/10.1016/0012-821X(71)90026-4	journal	December 1971
Phase relations, structure and crystal chemistry of some aluminous silicate perovskites Kesson, S. E.; Fitz Gerald, J. D.; Shelley, J. M. G. Earth and Planetary Science Letters, Vol. 134, Issue 1-2 https://doi.org/10.1016/0012-821X(95)00112-P	journal	August 1995
Preliminary reference Earth model Dziewonski, Adam M.; Anderson, Don L. Physics of the Earth and Planetary Interiors, Vol. 25, Issue 4 https://doi.org/10.1016/0031-9201(81)90046-7	journal	June 1981
High-pressure and high-temperature phase relations in CaSiO3 and CaMgSi2O6 and elasticity of perovskite-type CaSiO3 Tamai, Hiroshi; Yagi, Takehiko Physics of the Earth and Planetary Interiors, Vol. 54, Issue 3-4 https://doi.org/10.1016/0031-9201(89)90254-9	journal	April 1989
X-ray diffraction of ruby (Al2O3:Cr3+) to 175 GPa Jephcoat, A. P.; Hemley, R. J.; Mao, H. K. Physica B+C, Vol. 150, Issue 1-2 https://doi.org/10.1016/0378-4363(88)90112-X	journal	May 1988
Phase Transitions and Mineralogy of the Lower Mantle Irifune, T.; Tsuchiya, T. Treatise on Geophysics https://doi.org/10.1016/B978-0-444-53802-4.00030-0	book	January 2015
Mineralogy of subducted basaltic crust (MORB) from 25 to 37 GPa, and chemical heterogeneity of the lower mantle Ono, Shigeaki; Ito, Eiji; Katsura, Tomoo Earth and Planetary Science Letters, Vol. 190, Issue 1-2 https://doi.org/10.1016/S0012-821X(01)00375-2	journal	July 2001
Density of basaltic melt at high pressure and stability of the melt at the base of the lower mantle Ohtani, Eiji; Maeda, Makoto Earth and Planetary Science Letters, Vol. 193, Issue 1-2 https://doi.org/10.1016/S0012-821X(01)00505-2	journal	November 2001
Equation of state of lower mantle (Al,Fe)-MgSiO3 perovskite Andrault, Denis; Bolfan-Casanova, Nathalie; Guignot, Nicolas Earth and Planetary Science Letters, Vol. 193, Issue 3-4 https://doi.org/10.1016/S0012-821X(01)00506-4	journal	December 2001
The equation of state of CaSiO3 perovskite to 108 GPa at 300 K Shim, Sang-Heon; Duffy, Thomas S.; Shen, Guoyin Physics of the Earth and Planetary Interiors, Vol. 120, Issue 4 https://doi.org/10.1016/S0031-9201(00)00154-0	journal	August 2000
Cationic substitution in MgSiO3 perovskite Andrault, Denis Physics of the Earth and Planetary Interiors, Vol. 136, Issue 1-2 https://doi.org/10.1016/S0031-9201(03)00023-2	journal	April 2003
Garnet-perovskite transformation under conditions of the Earth's lower mantle: an analytical transmission electron microscopy study Miyajima, Nobuyoshi; Fujino, Kiyoshi; Funamori, Nobumasa Physics of the Earth and Planetary Interiors, Vol. 116, Issue 1-4 https://doi.org/10.1016/S0031-9201(99)00127-2	journal	December 1999
Equations of state of the high-pressure phases of a natural peridotite and implications for the Earth's lower mantle Lee, Kanani K. M.; O'Neill, Bridget; Panero, Wendy R. Earth and Planetary Science Letters, Vol. 223, Issue 3-4 https://doi.org/10.1016/j.epsl.2004.04.033	journal	July 2004
Subsolidus phase relations and perovskite compressibility in the system MgO–AlO1.5–SiO2 with implications for Earth's lower mantle Walter, Michael J.; Trønnes, Reidar G.; Armstrong, Lora S. Earth and Planetary Science Letters, Vol. 248, Issue 1-2 https://doi.org/10.1016/j.epsl.2006.05.017	journal	August 2006
Partial melting experiments of bimineralic eclogite and the role of recycled mafic oceanic crust in the genesis of ocean island basalts Kogiso, Tetsu; Hirschmann, Marc M. Earth and Planetary Science Letters, Vol. 249, Issue 3-4 https://doi.org/10.1016/j.epsl.2006.07.016	journal	September 2006
Effects of the Fe3+ spin transition on the properties of aluminous perovskite—New insights for lower-mantle seismic heterogeneities Catalli, Krystle; Shim, Sang-Heon; Dera, Przemyslaw Earth and Planetary Science Letters, Vol. 310, Issue 3-4 https://doi.org/10.1016/j.epsl.2011.08.018	journal	October 2011
Effect of chemistry on the compressibility of silicate perovskite in the lower mantle Ballaran, Tiziana Boffa; Kurnosov, Alexander; Glazyrin, Konstantin Earth and Planetary Science Letters, Vol. 333-334 https://doi.org/10.1016/j.epsl.2012.03.029	journal	June 2012
Effects of Fe-enrichment on the equation of state and stability of (Mg,Fe)SiO3 perovskite Dorfman, Susannah M.; Meng, Yue; Prakapenka, Vitali B. Earth and Planetary Science Letters, Vol. 361 https://doi.org/10.1016/j.epsl.2012.10.033	journal	January 2013
Oxidation potential in the Earth's lower mantle as recorded by ferropericlase inclusions in diamond Kaminsky, Felix V.; Ryabchikov, Igor D.; McCammon, Catherine A. Earth and Planetary Science Letters, Vol. 417 https://doi.org/10.1016/j.epsl.2015.02.029	journal	May 2015
Evidence for a deep mantle source for EM and HIMU domains from integrated geochemical and geophysical constraints Jackson, M. G.; Becker, T. W.; Konter, J. G. Earth and Planetary Science Letters, Vol. 484 https://doi.org/10.1016/j.epsl.2017.11.052	journal	February 2018
Approach to the mineralogy of the lower mantle by a combined method of a laser-heated diamond anvil cell experiment and analytical electron microscopy Fujino, Kiyoshi; Sasaki, Yohei; Komori, Toyohisa Physics of the Earth and Planetary Interiors, Vol. 143-144 https://doi.org/10.1016/j.pepi.2003.11.013	journal	June 2004
Al, Fe substitution in the MgSiO3 perovskite structure: A single-crystal X-ray diffraction study Vanpeteghem, C. B.; Angel, R. J.; Ross, N. L. Physics of the Earth and Planetary Interiors, Vol. 155, Issue 1-2 https://doi.org/10.1016/j.pepi.2005.10.003	journal	April 2006
Effect of Fe on the equation of state of mantle silicate perovskite over 1Mbar Lundin, S.; Catalli, K.; Santillán, J. Physics of the Earth and Planetary Interiors, Vol. 168, Issue 1-2 https://doi.org/10.1016/j.pepi.2008.05.002	journal	May 2008
Experimental constraints on the temperature profile in the lower mantle Ono, Shigeaki Physics of the Earth and Planetary Interiors, Vol. 170, Issue 3-4 https://doi.org/10.1016/j.pepi.2008.06.033	journal	November 2008
The Soret diffusion in laser-heated diamond-anvil cell Sinmyo, Ryosuke; Hirose, Kei Physics of the Earth and Planetary Interiors, Vol. 180, Issue 3-4 https://doi.org/10.1016/j.pepi.2009.10.011	journal	June 2010
Physics of the Earth Stacey, Frank D.; Davis, Paul M. https://doi.org/10.1017/CBO9780511812910	book	January 2008
CaSiO ₃ and CaTiO ₃ perovskite-melt partitioning of trace elements: Implications for gross mantle differentiation: CALCIUM PEROVSKITE-MELT PARTITIONING OF TRACE ELEMENTS Corgne, Alexandre; Wood, Bernard J. Geophysical Research Letters, Vol. 29, Issue 19 https://doi.org/10.1029/2001GL014398	journal	October 2002
Aluminum in magnesium silicate perovskite: Formation, structure, and energetics of magnesium-rich defect solid solutions: ALUMINUM IN SILICATE PEROVSKITE Navrotsky, Alexandra; Schoenitz, Mirko; Kojitani, Hiroshi Journal of Geophysical Research: Solid Earth, Vol. 108, Issue B7 https://doi.org/10.1029/2002JB002055	journal	July 2003
Phase relation and mineral chemistry in pyrolite to 2200°C under the lower mantle pressures and implications for dynamics of mantle plumes: PHASE RELATION AND CHEMISTRY IN PYROLITE Nishiyama, Norimasa; Yagi, Takehiko Journal of Geophysical Research: Solid Earth, Vol. 108, Issue B5 https://doi.org/10.1029/2002JB002216	journal	May 2003
Phase relations and equation of state of a natural MORB: Implications for the density profile of subducted oceanic crust in the Earth's lower mantle Ricolleau, Angèle; Perrillat, Jean-Philippe; Fiquet, Guillaume Journal of Geophysical Research, Vol. 115, Issue B8 https://doi.org/10.1029/2009JB006709	journal	January 2010
MgSiO ₃ -FeSiO ₃ -Al ₂ O ₃ in the Earth's lower mantle: Perovskite and garnet at 1200 km depth O'Neill, Bridget; Jeanloz, Raymond Journal of Geophysical Research: Solid Earth, Vol. 99, Issue B10 https://doi.org/10.1029/94JB01752	journal	October 1994
The integral enstatite chondrite model of the Earth Javoy, M. Geophysical Research Letters, Vol. 22, Issue 16 https://doi.org/10.1029/95GL02015	journal	August 1995
Phase transformations in diopside CaMgSi ₂ O ₆ at pressures Up to 25 GPa Irifune, Tetsuo; Susaki, Jun-ichi; Yagi, Takehiko Geophysical Research Letters, Vol. 16, Issue 2 https://doi.org/10.1029/GL016i002p00187	journal	February 1989
Static compression of iron to 78 GPa with rare gas solids as pressure-transmitting media Jephcoat, Andrew P.; Mao, H. K.; Bell, Peter M. Journal of Geophysical Research, Vol. 91, Issue B5 https://doi.org/10.1029/JB091iB05p04677	journal	January 1986
Stability and equation of state of CaSiO ₃ -Perovskite to 134 GPa Mao, H. K.; Chen, L. C.; Hemley, R. J. Journal of Geophysical Research, Vol. 94, Issue B12 https://doi.org/10.1029/JB094iB12p17889	journal	January 1989
Elasticity and constitution of the Earth's interior Birch, Francis Journal of Geophysical Research, Vol. 57, Issue 2 https://doi.org/10.1029/JZ057i002p00227	journal	June 1952
Pressure-induced changes in the compression mechanism of aluminous perovskite in the Earth's mantle Brodholt, John P. Nature, Vol. 407, Issue 6804 https://doi.org/10.1038/35036565	journal	October 2000
Experimental and theoretical identification of a new high-pressure phase of silica Dubrovinsky, L. S.; Saxena, S. K.; Lazor, P. Nature, Vol. 388, Issue 6640 https://doi.org/10.1038/41066	journal	July 1997
Perovskite as a possible sink for ferric iron in the lower mantle McCammon, Catherine Nature, Vol. 387, Issue 6634 https://doi.org/10.1038/42685	journal	June 1997
Experimental evidence for the existence of iron-rich metal in the Earth's lower mantle Frost, Daniel J.; Liebske, Christian; Langenhorst, Falko Nature, Vol. 428, Issue 6981 https://doi.org/10.1038/nature02413	journal	March 2004
Broad plumes rooted at the base of the Earth's mantle beneath major hotspots French, Scott W.; Romanowicz, Barbara Nature, Vol. 525, Issue 7567 https://doi.org/10.1038/nature14876	journal	September 2015
Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data Kurnosov, A.; Marquardt, H.; Frost, D. J. Nature, Vol. 543, Issue 7646 https://doi.org/10.1038/nature21390	journal	March 2017
Redox-induced lower mantle density contrast and effect on mantle structure and primitive oxygen Gu, Tingting; Li, Mingming; McCammon, Catherine Nature Geoscience, Vol. 9, Issue 9 https://doi.org/10.1038/ngeo2772	journal	August 2016
Pressure calibration of diamond anvil Raman gauge to 310GPa Akahama, Yuichi; Kawamura, Haruki Journal of Applied Physics, Vol. 100, Issue 4 https://doi.org/10.1063/1.2335683	journal	August 2006
Vibrational, elastic, and structural properties of cubic silicon carbide under pressure up to 75 GPa: Implication for a primary pressure scale Zhuravlev, K. K.; Goncharov, Alexander F.; Tkachev, S. N. Journal of Applied Physics, Vol. 113, Issue 11 https://doi.org/10.1063/1.4795348	journal	March 2013
New developments in laser-heated diamond anvil cell with in situ synchrotron x-ray diffraction at High Pressure Collaborative Access Team Meng, Yue; Hrubiak, Rostislav; Rod, Eric Review of Scientific Instruments, Vol. 86, Issue 7 https://doi.org/10.1063/1.4926895	journal	July 2015
Using stepped anvils to make even insulation layers in laser-heated diamond-anvil cell samples Du, Zhixue; Gu, Tingting; Dobrosavljevic, Vasilije Review of Scientific Instruments, Vol. 86, Issue 9 https://doi.org/10.1063/1.4929667	journal	September 2015
Stability of ferrous-iron-rich bridgmanite under reducing midmantle conditions Shim, Sang-Heon; Grocholski, Brent; Ye, Yu Proceedings of the National Academy of Sciences, Vol. 114, Issue 25 https://doi.org/10.1073/pnas.1614036114	journal	June 2017
Perovskite Phase Relations in the System CaO-MgO-TiO2-SiO2 and Implications for Deep Mantle Lithologies Armstrong, L. S.; Walter, M. J.; Tuff, J. R. Journal of Petrology, Vol. 53, Issue 3 https://doi.org/10.1093/petrology/egr073	journal	January 2012
GSAS-II : the genesis of a modern open-source all purpose crystallography software package Toby, Brian H.; Von Dreele, Robert B. Journal of Applied Crystallography, Vol. 46, Issue 2 https://doi.org/10.1107/S0021889813003531	journal	March 2013
Rietveld refinement guidelines McCusker, L. B.; Von Dreele, R. B.; Cox, D. E. Journal of Applied Crystallography, Vol. 32, Issue 1 https://doi.org/10.1107/S0021889898009856	journal	February 1999
Thermodynamic parameters in the Earth as determined from seismic profiles Brown, J. M.; Shankland, T. J. Geophysical Journal International, Vol. 66, Issue 3 https://doi.org/10.1111/j.1365-246X.1981.tb04891.x	journal	September 1981
Thermodynamics of mantle minerals - II. Phase equilibria Stixrude, Lars; Lithgow-Bertelloni, Carolina Geophysical Journal International, Vol. 184, Issue 3 https://doi.org/10.1111/j.1365-246X.2010.04890.x	journal	March 2011
Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite Tschauner, Oliver; Ma, Chi; Beckett, John R. Science, Vol. 346, Issue 6213 https://doi.org/10.1126/science.1259369	journal	November 2014
Alkalic magmas generated by partial melting of garnet pyroxenite Hirschmann, Marc M.; Kogiso, Tetsu; Baker, Michael B. Geology, Vol. 31, Issue 6 https://doi.org/10.1130/0091-7613(2003)031<0481:AMGBPM>2.0.CO;2	journal	January 2003
Mantle Mixing: The Generation, Preservation, and Destruction of Chemical Heterogeneity van Keken, Peter E.; Hauri, Erik H.; Ballentine, Chris J. Annual Review of Earth and Planetary Sciences, Vol. 30, Issue 1 https://doi.org/10.1146/annurev.earth.30.091201.141236	journal	May 2002
The Redox State of Earth's Mantle Frost, Daniel J.; McCammon, Catherine A. Annual Review of Earth and Planetary Sciences, Vol. 36, Issue 1 https://doi.org/10.1146/annurev.earth.36.031207.124322	journal	May 2008
X-ray diffraction and Mossbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128-138 GPa Catalli, K.; Shim, S. -H.; Prakapenka, V. B. American Mineralogist, Vol. 95, Issue 2-3 https://doi.org/10.2138/am.2010.3352	journal	February 2010
Synthesis and crystal chemistry of Fe3+-bearing (Mg,Fe3+)(Si,Fe3+)O3 perovskite Hummer, D. R.; Fei, Y. American Mineralogist, Vol. 97, Issue 11-12 https://doi.org/10.2138/am.2012.4144	journal	October 2012
Large oxygen excess in the primitive mantle could be the source of the Great Oxygenation Event Andrault, D.; Muñoz, M.; Pesce, G. Geochemical Perspectives Letters https://doi.org/10.7185/geochemlet.1801	journal	January 2018

Similar Records

Stability of ferrous-iron-rich bridgmanite under reducing midmantle conditions

Journal Article · Mon Jun 05 00:00:00 EDT 2017 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1376706

Synthesis, Elasticity, and Spin State of an Intermediate MgSiO₃-FeAlO₃ Bridgmanite: Implications for Iron in Earth's Lower Mantle

Journal Article · Mon Jul 20 00:00:00 EDT 2020 · Journal of Geophysical Research. Solid Earth · OSTI ID:1774255

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES

The Role of Redox on Bridgmanite Crystal Chemistry and Calcium Speciation in the Lower Mantle

Citation Formats

References (65)

Similar Records

Related Subjects