Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments. / Walte, Nicolas; Solferino, Giulio; Golabek, Gregor; Silva Souza, Danielle; Bouvier, Audrey.

In: Earth and Planetary Science Letters, Vol. 546, 116419, 15.09.2020, p. 1-11.

Research output: Contribution to journalArticle

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Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments. / Walte, Nicolas; Solferino, Giulio; Golabek, Gregor; Silva Souza, Danielle; Bouvier, Audrey.

In: Earth and Planetary Science Letters, Vol. 546, 116419, 15.09.2020, p. 1-11.

Research output: Contribution to journalArticle

Harvard

Walte, N, Solferino, G, Golabek, G, Silva Souza, D & Bouvier, A 2020, 'Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments', Earth and Planetary Science Letters, vol. 546, 116419, pp. 1-11. https://doi.org/10.1016/j.epsl.2020.116419

APA

Walte, N., Solferino, G., Golabek, G., Silva Souza, D., & Bouvier, A. (2020). Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments. Earth and Planetary Science Letters, 546, 1-11. [116419]. https://doi.org/10.1016/j.epsl.2020.116419

Vancouver

Walte N, Solferino G, Golabek G, Silva Souza D, Bouvier A. Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments. Earth and Planetary Science Letters. 2020 Sep 15;546:1-11. 116419. https://doi.org/10.1016/j.epsl.2020.116419

Author

Walte, Nicolas ; Solferino, Giulio ; Golabek, Gregor ; Silva Souza, Danielle ; Bouvier, Audrey. / Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments. In: Earth and Planetary Science Letters. 2020 ; Vol. 546. pp. 1-11.

BibTeX

@article{dd326b908e2b4bed831022e30879eeff,
title = "Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments",
abstract = "Pallasites, stony-iron meteorites predominantly composed of olivine crystals and Fe-Ni metal, are samples of the interior of early solar system bodies and can thus provide valuable insights into the formation of terrestrial planets. However, pallasite origin is controversial, either sampling the core-mantle boundary or the shallower mantle of planetesimals that suffered an impact. We present high strain-rate deformation experiments with the model system olivine + FeS melt ± gold melt to investigate pallasite formation and the evolution of their parent bodies and compare the resulting microstructures to two samples of Seymchan pallasite. Our experiments reproduced the major textural features of pallasites including the different olivine shapes, olivine aggregates, and the distribution of the metal and sulfide phases. These results indicate that pallasites preserve evidence for a two-stage formation process including inefficient core-mantle differentiation and an impact causing disruption, metal melt injection, and fast cooling within months to years. Olivine aggregates, important constituents of angular pallasites, are reinterpreted as samples of a partially differentiated mantle containing primordial metallic melt not stemming from the impactor. The long-term retention of more than 10 vol% of metal melt in a silicate mantle sampled by olivine aggregates indicates high effective percolation thresholds and inefficient metal-silicate differentiation in planetesimals not experiencing a magma ocean stage.",
author = "Nicolas Walte and Giulio Solferino and Gregor Golabek and {Silva Souza}, Danielle and Audrey Bouvier",
year = "2020",
month = sep,
day = "15",
doi = "10.1016/j.epsl.2020.116419",
language = "English",
volume = "546",
pages = "1--11",
journal = "Earth and Planetary Science Letters",
issn = "0012-821X",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Two-stage formation of pallasites and the evolution of their parent bodies revealed by deformation experiments

AU - Walte, Nicolas

AU - Solferino, Giulio

AU - Golabek, Gregor

AU - Silva Souza, Danielle

AU - Bouvier, Audrey

PY - 2020/9/15

Y1 - 2020/9/15

N2 - Pallasites, stony-iron meteorites predominantly composed of olivine crystals and Fe-Ni metal, are samples of the interior of early solar system bodies and can thus provide valuable insights into the formation of terrestrial planets. However, pallasite origin is controversial, either sampling the core-mantle boundary or the shallower mantle of planetesimals that suffered an impact. We present high strain-rate deformation experiments with the model system olivine + FeS melt ± gold melt to investigate pallasite formation and the evolution of their parent bodies and compare the resulting microstructures to two samples of Seymchan pallasite. Our experiments reproduced the major textural features of pallasites including the different olivine shapes, olivine aggregates, and the distribution of the metal and sulfide phases. These results indicate that pallasites preserve evidence for a two-stage formation process including inefficient core-mantle differentiation and an impact causing disruption, metal melt injection, and fast cooling within months to years. Olivine aggregates, important constituents of angular pallasites, are reinterpreted as samples of a partially differentiated mantle containing primordial metallic melt not stemming from the impactor. The long-term retention of more than 10 vol% of metal melt in a silicate mantle sampled by olivine aggregates indicates high effective percolation thresholds and inefficient metal-silicate differentiation in planetesimals not experiencing a magma ocean stage.

AB - Pallasites, stony-iron meteorites predominantly composed of olivine crystals and Fe-Ni metal, are samples of the interior of early solar system bodies and can thus provide valuable insights into the formation of terrestrial planets. However, pallasite origin is controversial, either sampling the core-mantle boundary or the shallower mantle of planetesimals that suffered an impact. We present high strain-rate deformation experiments with the model system olivine + FeS melt ± gold melt to investigate pallasite formation and the evolution of their parent bodies and compare the resulting microstructures to two samples of Seymchan pallasite. Our experiments reproduced the major textural features of pallasites including the different olivine shapes, olivine aggregates, and the distribution of the metal and sulfide phases. These results indicate that pallasites preserve evidence for a two-stage formation process including inefficient core-mantle differentiation and an impact causing disruption, metal melt injection, and fast cooling within months to years. Olivine aggregates, important constituents of angular pallasites, are reinterpreted as samples of a partially differentiated mantle containing primordial metallic melt not stemming from the impactor. The long-term retention of more than 10 vol% of metal melt in a silicate mantle sampled by olivine aggregates indicates high effective percolation thresholds and inefficient metal-silicate differentiation in planetesimals not experiencing a magma ocean stage.

U2 - 10.1016/j.epsl.2020.116419

DO - 10.1016/j.epsl.2020.116419

M3 - Article

VL - 546

SP - 1

EP - 11

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

M1 - 116419

ER -