Seismic parameters of hcp‐Fe alloyed with Ni and Si in the Earth's inner core

Liu, Jin; Lin, Jung‐Fu; Alatas, Ahmet; Hu, Michael Y.; Zhao, Jiyong; Dubrovinsky, Leonid

doi:10.1002/2015JB012625

Title: Seismic parameters of hcp‐Fe alloyed with Ni and Si in the Earth's inner core

Journal Article · Thu Feb 18 00:00:00 EST 2016 · Journal of Geophysical Research. Solid Earth

DOI:https://doi.org/10.1002/2015JB012625· OSTI ID:1402160

Liu, Jin ^[1]; Lin, Jung‐Fu ^[2]; Alatas, Ahmet ^[3]; Hu, Michael Y. ^[3]; Zhao, Jiyong ^[3]; Dubrovinsky, Leonid ^[4]

Department of Geological Sciences, Jackson School of Geosciences University of Texas at Austin Austin Texas USA
Department of Geological Sciences, Jackson School of Geosciences University of Texas at Austin Austin Texas USA, Center for High Pressure Science and Advanced Technology Research Shanghai China
Advanced Photon Source Argonne National Laboratory Argonne Illinois USA
Bayerisches Geoinstitut Universität Bayreuth Bayreuth Germany

Abstract Iron alloyed with Ni and Si has been suggested to be a major component of the Earth's inner core. High‐pressure results on the combined alloying effects of Ni and Si on seismic parameters of iron are thus essential for establishing satisfactory geophysical and geochemical models of the region. Here we have investigated the compressional ( V _P ) and shear ( Vs ) wave velocity‐density ( ρ ) relations, Poisson's ratio ( ν ), and seismic heterogeneity ratios ( dlnρ / dlnV _P , dlnρ / dlnV _S , and dlnV _P / dlnV _S ) of hcp‐Fe and hcp‐Fe _86.8 Ni _8.6 Si _4.6 alloy up to 206 GPa and 136 GPa, respectively, using multiple complementary techniques. Compared with the literature velocity values for hcp‐Fe and Fe‐Ni‐Si alloys, our results show that the combined addition of 9.0 wt % Ni and 2.3 wt % Si slightly increases the V _P but significantly decreases the V _S of hcp‐Fe at a given density relevant to the inner core. Such distinct alloying effects on velocities of hcp‐Fe produce a high ν of about 0.40 for the alloy at inner core densities, which is approximately 20% higher than that for hcp‐Fe. Analysis of the literature high P‐T results on V _P and V _S of Fe alloyed with light elements shows that high temperature can further enhance the ν of hcp‐Fe alloyed with Ni and Si. Most significantly, the derived seismic heterogeneity ratios of this hcp alloy present a better match with global seismic observations. Our results provide a multifactored geophysical constraint on the compositional model of the inner core which is consistent with silicon being a major light element alloyed with Fe and 5 wt % Ni.

View Accepted Manuscript (Publisher)

Cite

Export

Save

Sponsoring Organization:: USDOE

OSTI ID:: 1402160

Journal Information:: Journal of Geophysical Research. Solid Earth, Journal Name: Journal of Geophysical Research. Solid Earth Vol. 121 Journal Issue: 2; ISSN 2169-9313

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 12 works

Citation information provided by
Web of Science

References (58)

Sound velocity of iron up to 152 GPa by picosecond acoustics in diamond anvil cell Decremps, F.; Antonangeli, D.; Gauthier, M. Geophysical Research Letters, Vol. 41, Issue 5 https://doi.org/10.1002/2013GL058859	journal	February 2014
The structure of Fe–Si alloy in Earth's inner core Tateno, Shigehiko; Kuwayama, Yasuhiro; Hirose, Kei Earth and Planetary Science Letters, Vol. 418 https://doi.org/10.1016/j.epsl.2015.02.008	journal	May 2015
Elasticity of iron at the temperature of the Earth's inner core Steinle-Neumann, Gerd; Stixrude, Lars; Cohen, R. E. Nature, Vol. 413, Issue 6851 https://doi.org/10.1038/35092536	journal	September 2001
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
Nuclear resonant scattering at high pressure and high temperature Zhao, Jiyong; Sturhahn, Wolfgang; Lin, Jung-fu High Pressure Research, Vol. 24, Issue 4 https://doi.org/10.1080/08957950412331331727	journal	December 2004
Sound velocity of hexagonal close‐packed iron up to core pressures Ohtani, Eiji; Shibazaki, Yuki; Sakai, Takeshi Geophysical Research Letters, Vol. 40, Issue 19 https://doi.org/10.1002/grl.50992	journal	October 2013
Sound Velocities in Iron to 110 Gigapascals Fiquet, G. Science, Vol. 291, Issue 5503 https://doi.org/10.1126/science.291.5503.468	journal	January 2001
Sound velocities for hexagonally close-packed iron compressed hydrostatically to 136 GPa from phonon density of states: SOUND VELOCITIES FOR HCP-IRON Gleason, A. E.; Mao, W. L.; Zhao, J. Y. Geophysical Research Letters, Vol. 40, Issue 12 https://doi.org/10.1002/grl.50588	journal	June 2013
Iron-Silicon Alloy in Earth's Core? Lin, J. -F. Science, Vol. 295, Issue 5553 https://doi.org/10.1126/science.1066932	journal	January 2002
Elastic isotropy of ɛ-Fe under Earth's core conditions: ELASTIC ISOTROPY OF ɛ-Fe Sha, Xianwei; Cohen, R. E. Geophysical Research Letters, Vol. 37, Issue 10 https://doi.org/10.1029/2009GL042224	journal	May 2010
Toward an internally consistent pressure scale Fei, Y.; Ricolleau, A.; Frank, M. Proceedings of the National Academy of Sciences, Vol. 104, Issue 22 https://doi.org/10.1073/pnas.0609013104	journal	May 2007
Abnormal Elastic and Vibrational Behaviors of Magnetite at High Pressures Lin, Jung-Fu; Wu, Junjie; Zhu, Jie Scientific Reports, Vol. 4, Issue 1 https://doi.org/10.1038/srep06282	journal	September 2014
Electrical and thermal transport properties of iron and iron-silicon alloy at high pressure: TRANSPORT PROPERTIES OF Fe AND Fe-Si Seagle, Christopher T.; Cottrell, Elizabeth; Fei, Yingwei Geophysical Research Letters, Vol. 40, Issue 20 https://doi.org/10.1002/2013GL057930	journal	October 2013
Spin crossover in ferropericlase and velocity heterogeneities in the lower mantle Wu, Z.; Wentzcovitch, R. M. Proceedings of the National Academy of Sciences, Vol. 111, Issue 29 https://doi.org/10.1073/pnas.1322427111	journal	July 2014
Joint seismic, geodynamic and mineral physical constraints on three-dimensional mantle heterogeneity: Implications for the relative importance of thermal versus compositional heterogeneity Simmons, Nathan A.; Forte, Alessandro M.; Grand, Stephen P. Geophysical Journal International, Vol. 177, Issue 3 https://doi.org/10.1111/j.1365-246X.2009.04133.x	journal	June 2009
Phonon Density of States of Iron up to 153 Gigapascals Mao, H. K. Science, Vol. 292, Issue 5518 https://doi.org/10.1126/science.1057670	journal	May 2001
The Elastic Behaviour of a Crystalline Aggregate Hill, R. Proceedings of the Physical Society. Section A, Vol. 65, Issue 5 https://doi.org/10.1088/0370-1298/65/5/307	journal	May 1952
The plastic deformation of iron at pressures of the Earth's inner core Wenk, H. -R.; Matthies, S.; Hemley, R. J. Nature, Vol. 405, Issue 6790 https://doi.org/10.1038/35016558	journal	June 2000
Sound velocity of hcp-Fe at high pressure: experimental constraints, extrapolations and comparison with seismic models Antonangeli, Daniele; Ohtani, Eiji Progress in Earth and Planetary Science, Vol. 2, Issue 1 https://doi.org/10.1186/s40645-015-0034-9	journal	March 2015
Melting of iron at the physical conditions of the Earth's core Nguyen, Jeffrey H.; Holmes, Neil C. Nature, Vol. 427, Issue 6972 https://doi.org/10.1038/nature02248	journal	January 2004
Magnetic transition and sound velocities of Fe3S at high pressure: implications for Earth and planetary cores Lin, Jung-Fu; Fei, Yingwei; Sturhahn, Wolfgang Earth and Planetary Science Letters, Vol. 226, Issue 1-2 https://doi.org/10.1016/j.epsl.2004.07.018	journal	September 2004
Experimental constraints on the thermodynamics and sound velocities of hcp-Fe to core pressures: THERMOELASTICITY OF hcp-Fe TO 171 GPa Murphy, Caitlin A.; Jackson, Jennifer M.; Sturhahn, Wolfgang Journal of Geophysical Research: Solid Earth, Vol. 118, Issue 5 https://doi.org/10.1002/jgrb.50166	journal	May 2013
Ab initio calculations of the elasticity of hcp-Fe as a function of temperature at inner-core pressure Vočadlo, Lidunka; Dobson, David P.; Wood, Ian G. Earth and Planetary Science Letters, Vol. 288, Issue 3-4 https://doi.org/10.1016/j.epsl.2009.10.015	journal	November 2009
Sound velocities of bcc-Fe and Fe0.85Si0.15 alloy at high pressure and temperature Liu, Jin; Lin, Jung-Fu; Alatas, Ahmet Physics of the Earth and Planetary Interiors, Vol. 233 https://doi.org/10.1016/j.pepi.2014.05.008	journal	August 2014
The effect of nickel on the properties of iron at the conditions of Earth's inner core: Ab initio calculations of seismic wave velocities of Fe–Ni alloys Martorell, Benjamí; Brodholt, John; Wood, Ian G. Earth and Planetary Science Letters, Vol. 365 https://doi.org/10.1016/j.epsl.2013.01.007	journal	March 2013
Core formation and core composition from coupled geochemical and geophysical constraints Badro, James; Brodholt, John P.; Piet, Hélène Proceedings of the National Academy of Sciences, Vol. 112, Issue 40 https://doi.org/10.1073/pnas.1505672112	journal	September 2015
Shock compression of Fe-Ni-Si system to 280 GPa: Implications for the composition of the Earth's outer core: Sekine, et al.: Shock compression of Fe-Ni-Si system Zhang, Youjun; Sekine, Toshimori; He, Hongliang Geophysical Research Letters, Vol. 41, Issue 13 https://doi.org/10.1002/2014GL060670	journal	July 2014
Simultaneous sound velocity and density measurements of hcp iron up to 93GPa and 1100K: An experimental test of the Birch's law at high temperature Antonangeli, Daniele; Komabayashi, Tetsuya; Occelli, Florent Earth and Planetary Science Letters, Vol. 331-332 https://doi.org/10.1016/j.epsl.2012.03.024	journal	May 2012
Sound velocities of Fe and Fe-Si alloy in the Earth's core Mao, Z.; Lin, J. -F.; Liu, J. Proceedings of the National Academy of Sciences, Vol. 109, Issue 26 https://doi.org/10.1073/pnas.1207086109	journal	June 2012
Equatorial anisotropy in the inner part of Earth’s inner core from autocorrelation of earthquake coda Wang, Tao; Song, Xiaodong; Xia, Han H. Nature Geoscience, Vol. 8, Issue 3 https://doi.org/10.1038/ngeo2354	journal	February 2015
Effect of light elements on the sound velocities in solid iron: Implications for the composition of Earth's core Badro, James; Fiquet, Guillaume; Guyot, François Earth and Planetary Science Letters, Vol. 254, Issue 1-2 https://doi.org/10.1016/j.epsl.2006.11.025	journal	February 2007
Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys Antonangeli, Daniele; Siebert, Julien; Badro, James Earth and Planetary Science Letters, Vol. 295, Issue 1-2 https://doi.org/10.1016/j.epsl.2010.04.018	journal	June 2010
The sound velocity measurements of Fe3S Kamada, S.; Ohtani, E.; Fukui, H. American Mineralogist, Vol. 99, Issue 1 https://doi.org/10.2138/am.2014.4463	journal	January 2014
Terrestrial Accretion Under Oxidizing Conditions Siebert, J.; Badro, J.; Antonangeli, D. Science, Vol. 339, Issue 6124 https://doi.org/10.1126/science.1227923	journal	January 2013
Improved focusing capability for inelastic X-ray spectrometer at 3-ID of the APS: A combination of toroidal and Kirkpatrick-Baez (KB) mirrors Alatas, A.; Leu, B. M.; Zhao, J. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 649, Issue 1 https://doi.org/10.1016/j.nima.2010.11.068	journal	September 2011
Heterogeneity and Anisotropy of Earth's Inner Core Deuss, Arwen Annual Review of Earth and Planetary Sciences, Vol. 42, Issue 1 https://doi.org/10.1146/annurev-earth-060313-054658	journal	May 2014
Mineral Physics Quest to the Earth's Core Dubrovinsky, Leonid; Lin, Jung-Fu Eos, Transactions American Geophysical Union, Vol. 90, Issue 3 https://doi.org/10.1029/2009EO030001	journal	January 2009
On the Presence of Liquid in Earth's Inner Core Singh, S. C. Science, Vol. 287, Issue 5462 https://doi.org/10.1126/science.287.5462.2471	journal	March 2000
Nuclear resonant x-ray scattering of iron hydride at high pressure Mao, Wendy L. Geophysical Research Letters, Vol. 31, Issue 15 https://doi.org/10.1029/2004GL020541	journal	January 2004
Effect of temperature on sound velocities of compressed Fe3C, a candidate component of the Earth's inner core Gao, Lili; Chen, Bin; Zhao, Jiyong Earth and Planetary Science Letters, Vol. 309, Issue 3-4 https://doi.org/10.1016/j.epsl.2011.06.037	journal	September 2011
Sound velocities of iron-nickel and iron-silicon alloys at high pressures Lin, Jung-Fu Geophysical Research Letters, Vol. 30, Issue 21 https://doi.org/10.1029/2003GL018405	journal	January 2003
Hidden carbon in Earth’s inner core revealed by shear softening in dense Fe ₇ C ₃ Chen, Bin; Li, Zeyu; Zhang, Dongzhou Proceedings of the National Academy of Sciences, Vol. 111, Issue 50 https://doi.org/10.1073/pnas.1411154111	journal	December 2014
Static compression of Fe0.83Ni0.09Si0.08 alloy to 374GPa and Fe0.93Si0.07 alloy to 252GPa: Implications for the Earth's inner core Asanuma, Hidetoshi; Ohtani, Eiji; Sakai, Takeshi Earth and Planetary Science Letters, Vol. 310, Issue 1-2 https://doi.org/10.1016/j.epsl.2011.06.034	journal	October 2011
Stability of the body-centred-cubic phase of iron in the Earth's inner core Belonoshko, Anatoly B.; Ahuja, Rajeev; Johansson, Börje Nature, Vol. 424, Issue 6952 https://doi.org/10.1038/nature01954	journal	August 2003
Shear wave anisotropy of textured hcp-Fe in the Earth's inner core Lin, Jung-Fu; Mao, Zhu; Yavaş, Hasan Earth and Planetary Science Letters, Vol. 298, Issue 3-4 https://doi.org/10.1016/j.epsl.2010.08.006	journal	October 2010
CONUSS and PHOENIX: Evaluation of nuclear resonant scattering data Sturhahn, W. Hyperfine Interactions, Vol. 125, Issue 1/4, p. 149-172 https://doi.org/10.1023/A:1012681503686	journal	March 2000
Six-reflection meV-monochromator for synchrotron radiation Toellner, T. S.; Alatas, A.; Said, A. H. Journal of Synchrotron Radiation, Vol. 18, Issue 4 https://doi.org/10.1107/S0909049511017535	journal	May 2011
Stability field of the hcp-structure for Fe, Fe-Ni, and Fe-Ni-Si alloys up to 3 Mbar: FE-NI-SI ALLOY UP TO 3 MBAR Sakai, Takeshi; Ohtani, Eiji; Hirao, Naohisa Geophysical Research Letters, Vol. 38, Issue 9 https://doi.org/10.1029/2011GL047178	journal	May 2011
Measuring velocity of sound with nuclear resonant inelastic x-ray scattering Hu, Michael Y.; Sturhahn, Wolfgang; Toellner, Thomas S. Physical Review B, Vol. 67, Issue 9 https://doi.org/10.1103/PhysRevB.67.094304	journal	March 2003
Static compression of iron to 300 GPa and Fe _0.8 Ni _0.2 alloy to 260 GPa: Implications for composition of the core Mao, H. K.; Wu, Y.; Chen, L. C. Journal of Geophysical Research, Vol. 95, Issue B13 https://doi.org/10.1029/JB095iB13p21737	journal	January 1990
Quasihydrostatic Equation of State of Iron above 2 Mbar Dewaele, Agnès; Loubeyre, Paul; Occelli, Florent Physical Review Letters, Vol. 97, Issue 21 https://doi.org/10.1103/PhysRevLett.97.215504	journal	November 2006
Composition and State of the Core Hirose, Kei; Labrosse, Stéphane; Hernlund, John Annual Review of Earth and Planetary Sciences, Vol. 41, Issue 1 https://doi.org/10.1146/annurev-earth-050212-124007	journal	May 2013
Pressure-Induced Magnetization in FeO: Evidence from Elasticity and Mössbauer Spectroscopy Kantor, Anastasia P.; Jacobsen, Steven D.; Kantor, Innokenty Yu. Physical Review Letters, Vol. 93, Issue 21 https://doi.org/10.1103/PhysRevLett.93.215502	journal	November 2004
Sound Velocities of Hot Dense Iron: Birch's Law Revisited Lin, J. -F. Science, Vol. 308, Issue 5730 https://doi.org/10.1126/science.1111724	journal	June 2005
High Poisson's ratio of Earth's inner core explained by carbon alloying Prescher, C.; Dubrovinsky, L.; Bykova, E. Nature Geoscience, Vol. 8, Issue 3 https://doi.org/10.1038/ngeo2370	journal	February 2015
Solubility of silicon in liquid metal at high pressure: implications for the composition of the Earth’s core Gessmann, C. K.; Wood, B. J.; Rubie, D. C. Earth and Planetary Science Letters, Vol. 184, Issue 2 https://doi.org/10.1016/S0012-821X(00)00325-3	journal	January 2001
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
Sound velocity measurements in dhcp-FeH up to 70GPa with inelastic X-ray scattering: Implications for the composition of the Earth's core Shibazaki, Yuki; Ohtani, Eiji; Fukui, Hiroshi Earth and Planetary Science Letters, Vol. 313-314 https://doi.org/10.1016/j.epsl.2011.11.002	journal	January 2012

Similar Records

Equations of State and Anisotropy of Fe-Ni-Si Alloys

Journal Article · Mon Apr 30 00:00:00 EDT 2018 · Journal of Geophysical Research. Solid Earth · OSTI ID:1402160

Morrison, Rachel A.; Jackson, Jennifer M.; Sturhahn, Wolfgang; +2 more

High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys

Journal Article · Sun Sep 01 00:00:00 EDT 2019 · Physics of the Earth and Planetary Interiors · OSTI ID:1402160

Morrison, Rachel A.; Jackson, Jennifer M.; Sturhahn, Wolfgang; +2 more

Elastic properties of metals and minerals under shock compression

Miscellaneous · Wed Jan 01 00:00:00 EST 1992 · OSTI ID:1402160

Duffy, T S

Title: Seismic parameters of hcp‐Fe alloyed with Ni and Si in the Earth's inner core

Citation Formats

References (58)

Similar Records

Related Subjects