Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples

Mouloud, B.-E.; Jacob, D.; de la Peña, F.; Marinova, M.; Le, Guillou, L.; Viennet, J.-C.; Laforet, S.; Leroux, H.; Teurtrie, A.; Noguchi, T.; Matsumoto, T.; Miyake, A.; Igami, Y.; Haruta, M.; Saito, H.; Hata, S.; Seto, Y.; Miyahara, M.; Tomioka, N.; Ishii, H.A.; Bradley, J.P.; Ohtaki, K.K.; Dobrica, E.; Langenhorst, F.; Harries, D.; Beck, P.; Phan, T.H.V.; Rebois, R.; Abreu, N.M.; Gray, J.; Zega, T.; Zanetta, P.-M.; Thompson, M.S.; Stroud, R.; Burgess, K.; Cymes, B.A.; Bridges, J.C.; Hicks, L.; Lee, M.R.; Daly, L.; Bland, P.A.; Zolensky, M.E.; Frank, D.R.; Martinez, J.; Tsuchiyama, A.; Yasutake, M.; Matsuno, J.; Okumura, S.; Mitsukawa, I.; Uesugi, K.; Uesugi, M.; Takeuchi, A.; Sun, M.; Enju, S.; Takigawa, A.; Michikami, T.; Nakamura, T.; Matsumoto, M.; Nakauchi, Y.; Abe, M.; Nakazawa, S.; Okada, T.; Saiki, T.; Tanaka, S.; Terui, F.; Yoshikawa, M.; Miyazaki, A.; Nakato, A.; Nishimura, M.; Usui, T.; Yada, T.; Yurimoto, H.; Nagashima, K.; Kawasaki, N.; Sakamotoa, N.; Okazaki, R.; Yabuta, H.; Naraoka, H.; Sakamoto, K.; Tachibana, S.; Watanabe, S.-I.; Tsuda, Y.

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Mouloud, B.-E.
Jacob, D.
de la Peña, F.
Marinova, M.
Le, Guillou, L.
Viennet, J.-C.
Laforet, S.
Leroux, H.
Teurtrie, A.
Noguchi, T.

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Affiliation

Department of Planetary Sciences, The University of Arizona

Issue Date

2024-01-05

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Publisher

Meteoritical Society

Citation

Mouloud, B.-e., Jacob, D., de la Peña, F., Marinova, M., Le Guillou, C., Viennet, J.-C., Laforet, S., Leroux, H., Teurtrie, A., Noguchi, T., Matsumoto, T., Miyake, A., Igami, Y., Haruta, M., Saito, H., Hata, S., Seto, Y., Miyahara, M., Tomioka, N., Ishii, H.A., Bradley, J.P., Ohtaki, K.K., Dobrica, E., Langenhorst, F., Harries, D., Beck, P., Phan, T.H.V., Rebois, R., Abreu, N.M., Gray, J., Zega, T., Zanetta, P.-M., Thompson, M.S., Stroud, R., Burgess, K., Cymes, B.A., Bridges, J.C., Hicks, L., Lee, M.R., Daly, L., Bland, P.A., Zolensky, M.E., Frank, D.R., Martinez, J., Tsuchiyama, A., Yasutake, M., Matsuno, J., Okumura, S., Mitsukawa, I., Uesugi, K., Uesugi, M., Takeuchi, A., Sun, M., Enju, S., Takigawa, A., Michikami, T., Nakamura, T., Matsumoto, M., Nakauchi, Y., Abe, M., Nakazawa, S., Okada, T., Saiki, T., Tanaka, S., Terui, F., Yoshikawa, M., Miyazaki, A., Nakato, A., Nishimura, M., Usui, T., Yada, T., Yurimoto, H., Nagashima, K., Kawasaki, N., Sakamotoa, N., Okazaki, R., Yabuta, H., Naraoka, H., Sakamoto, K., Tachibana, S., Watanabe, S.-i. and Tsuda, Y. (2024), Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples. Meteorit Planet Sci. https://doi.org/10.1111/maps.14124

Journal

Meteoritics and Planetary Science

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© 2024 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals LLC on behalf of The Meteoritical Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.

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This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.

Abstract

Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate-rich matrix with four-dimensional scanning transmission electron microscopy (4D-STEM). We have identified and mapped the mineral phases at the nanometer scale (serpentine, smectite, pyrrhotite), observed the presence of Ni-bearing pyrrhotite, and identified the serpentine polymorph as lizardite, in agreement with the reported aqueous alteration history of Ryugu. Furthermore, we have mapped the d-spacings of smectite and observed a broad distribution of values, ranging from 1 to 2 nm, with an average d-spacing of 1.24 nm, indicating significant heterogeneity within the sample. Such d-spacing variability could be the result of either the presence of organic matter trapped in the interlayers or the influence of various geochemical conditions at the submicrometer scale, suggestive of a range of organic compounds and/or changes in smectite crystal chemistry. © 2024 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals LLC on behalf of The Meteoritical Society.

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Open access article

ISSN

1086-9379

DOI

10.1111/maps.14124

Version

Final Published Version

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UA Faculty Publications

© 2024 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals LLC on behalf of The Meteoritical Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.

Except where otherwise noted, this item's license is described as © 2024 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals LLC on behalf of The Meteoritical Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.