Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion

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Standard

Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion. / Zhu, Ke; Moynier, Frederic; Alexander, Conel M. O'D.; Davidson, Jemma; Schrader, Devin L.; Zhu, Jian-Ming; Wu, Guang-Liang; Schiller, Martin; Bizzarro, Martin; Becker, Harry.

In: The Astrophysical Journal, Vol. 923, No. 1, 94, 2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Zhu, K, Moynier, F, Alexander, CMOD, Davidson, J, Schrader, DL, Zhu, J-M, Wu, G-L, Schiller, M, Bizzarro, M & Becker, H 2021, 'Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion', The Astrophysical Journal, vol. 923, no. 1, 94. https://doi.org/10.3847/1538-4357/ac2570

APA

Zhu, K., Moynier, F., Alexander, C. M. OD., Davidson, J., Schrader, D. L., Zhu, J-M., Wu, G-L., Schiller, M., Bizzarro, M., & Becker, H. (2021). Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion. The Astrophysical Journal, 923(1), [94]. https://doi.org/10.3847/1538-4357/ac2570

Vancouver

Zhu K, Moynier F, Alexander CMOD, Davidson J, Schrader DL, Zhu J-M et al. Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion. The Astrophysical Journal. 2021;923(1). 94. https://doi.org/10.3847/1538-4357/ac2570

Author

Zhu, Ke ; Moynier, Frederic ; Alexander, Conel M. O'D. ; Davidson, Jemma ; Schrader, Devin L. ; Zhu, Jian-Ming ; Wu, Guang-Liang ; Schiller, Martin ; Bizzarro, Martin ; Becker, Harry. / Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion. In: The Astrophysical Journal. 2021 ; Vol. 923, No. 1.

Bibtex

@article{f5cb172cbd8349759d278be4743cf844,
title = "Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion",
abstract = "We investigated the stable isotope fractionation of chromium (Cr) for a panorama of chondrites, including EH and EL enstatite chondrites and their chondrules and different phases (by acid leaching). We observed that chondrites have heterogeneous delta Cr-53 values (per mil deviation of the Cr-53/Cr-52 from the NIST SRM 979 standard), which we suggest reflect different physical conditions in the different chondrite accretion regions. Chondrules from a primitive EH3 chondrite (SAH 97096) possess isotopically heavier Cr relative to their host bulk chondrite, which may be caused by Cr evaporation in a reduced chondrule-forming region of the protoplanetary disk. Enstatite chondrites show a range of bulk delta Cr-53 values that likely result from variable mixing of isotopically different sulfide-silicate-metal phases. The bulk silicate Earth (delta Cr-53 = -0.12 +/- 0.02 parts per thousand, 2SE) has a lighter Cr stable isotope composition compared to the average delta Cr-53 value of enstatite chondrites (-0.05 +/- 0.02 parts per thousand, 2SE, when two samples out of 19 are excluded). If the bulk Earth originally had a Cr isotopic composition that was similar to the average enstatite chondrites, this Cr isotope difference may be caused by evaporation under equilibrium conditions from magma oceans on Earth or its planetesimal building blocks, as previously suggested to explain the magnesium and silicon isotope differences between Earth and enstatite chondrites. Alternatively, chemical differences between Earth and enstatite chondrite can result from thermal processes in the solar nebula and the enstatite chondrite-Earth, which would also have changed the Cr isotopic composition of Earth and enstatite chondrite parent body precursors.",
keywords = "SOLAR NEBULA, CHEMICAL-COMPOSITION, OXYGEN ISOTOPES, PARENT BODIES, COMPOSITIONAL CLASSIFICATION, CONDENSATION TEMPERATURES, PROTOPLANETARY DISK, SILICON ISOTOPES, BUILDING-BLOCKS, TRACE-ELEMENTS",
author = "Ke Zhu and Frederic Moynier and Alexander, {Conel M. O'D.} and Jemma Davidson and Schrader, {Devin L.} and Jian-Ming Zhu and Guang-Liang Wu and Martin Schiller and Martin Bizzarro and Harry Becker",
year = "2021",
doi = "10.3847/1538-4357/ac2570",
language = "English",
volume = "923",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - Chromium Stable Isotope Panorama of Chondrites and Implications for Earth Early Accretion

AU - Zhu, Ke

AU - Moynier, Frederic

AU - Alexander, Conel M. O'D.

AU - Davidson, Jemma

AU - Schrader, Devin L.

AU - Zhu, Jian-Ming

AU - Wu, Guang-Liang

AU - Schiller, Martin

AU - Bizzarro, Martin

AU - Becker, Harry

PY - 2021

Y1 - 2021

N2 - We investigated the stable isotope fractionation of chromium (Cr) for a panorama of chondrites, including EH and EL enstatite chondrites and their chondrules and different phases (by acid leaching). We observed that chondrites have heterogeneous delta Cr-53 values (per mil deviation of the Cr-53/Cr-52 from the NIST SRM 979 standard), which we suggest reflect different physical conditions in the different chondrite accretion regions. Chondrules from a primitive EH3 chondrite (SAH 97096) possess isotopically heavier Cr relative to their host bulk chondrite, which may be caused by Cr evaporation in a reduced chondrule-forming region of the protoplanetary disk. Enstatite chondrites show a range of bulk delta Cr-53 values that likely result from variable mixing of isotopically different sulfide-silicate-metal phases. The bulk silicate Earth (delta Cr-53 = -0.12 +/- 0.02 parts per thousand, 2SE) has a lighter Cr stable isotope composition compared to the average delta Cr-53 value of enstatite chondrites (-0.05 +/- 0.02 parts per thousand, 2SE, when two samples out of 19 are excluded). If the bulk Earth originally had a Cr isotopic composition that was similar to the average enstatite chondrites, this Cr isotope difference may be caused by evaporation under equilibrium conditions from magma oceans on Earth or its planetesimal building blocks, as previously suggested to explain the magnesium and silicon isotope differences between Earth and enstatite chondrites. Alternatively, chemical differences between Earth and enstatite chondrite can result from thermal processes in the solar nebula and the enstatite chondrite-Earth, which would also have changed the Cr isotopic composition of Earth and enstatite chondrite parent body precursors.

AB - We investigated the stable isotope fractionation of chromium (Cr) for a panorama of chondrites, including EH and EL enstatite chondrites and their chondrules and different phases (by acid leaching). We observed that chondrites have heterogeneous delta Cr-53 values (per mil deviation of the Cr-53/Cr-52 from the NIST SRM 979 standard), which we suggest reflect different physical conditions in the different chondrite accretion regions. Chondrules from a primitive EH3 chondrite (SAH 97096) possess isotopically heavier Cr relative to their host bulk chondrite, which may be caused by Cr evaporation in a reduced chondrule-forming region of the protoplanetary disk. Enstatite chondrites show a range of bulk delta Cr-53 values that likely result from variable mixing of isotopically different sulfide-silicate-metal phases. The bulk silicate Earth (delta Cr-53 = -0.12 +/- 0.02 parts per thousand, 2SE) has a lighter Cr stable isotope composition compared to the average delta Cr-53 value of enstatite chondrites (-0.05 +/- 0.02 parts per thousand, 2SE, when two samples out of 19 are excluded). If the bulk Earth originally had a Cr isotopic composition that was similar to the average enstatite chondrites, this Cr isotope difference may be caused by evaporation under equilibrium conditions from magma oceans on Earth or its planetesimal building blocks, as previously suggested to explain the magnesium and silicon isotope differences between Earth and enstatite chondrites. Alternatively, chemical differences between Earth and enstatite chondrite can result from thermal processes in the solar nebula and the enstatite chondrite-Earth, which would also have changed the Cr isotopic composition of Earth and enstatite chondrite parent body precursors.

KW - SOLAR NEBULA

KW - CHEMICAL-COMPOSITION

KW - OXYGEN ISOTOPES

KW - PARENT BODIES

KW - COMPOSITIONAL CLASSIFICATION

KW - CONDENSATION TEMPERATURES

KW - PROTOPLANETARY DISK

KW - SILICON ISOTOPES

KW - BUILDING-BLOCKS

KW - TRACE-ELEMENTS

U2 - 10.3847/1538-4357/ac2570

DO - 10.3847/1538-4357/ac2570

M3 - Journal article

VL - 923

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 94

ER -

ID: 288048792