Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite
Dennis Harries
(1, 2)
,
Toru Matsumoto
(3, 4)
,
Falko Langenhorst
(1)
,
Takaaki Noguchi
(3)
,
Akira Miyake
(3)
,
Yohei Igami
(3)
,
Mitsutaka Haruta
(4)
,
Yusuke Seto
(5)
,
Masaaki Miyahara
(6)
,
Naotaka Tomioka
(7)
,
Hikaru Saito
(8)
,
Satoshi Hata
(8)
,
Aki Takigawa
(9)
,
Yusuke Nakauchi
(10)
,
Shogo Tachibana
(11)
,
Tomoki Nakamura
(12)
,
Megumi Matsumoto
(12)
,
Hope A. Ishii
(13)
,
John P. Bradley
(13)
,
Kenta Ohtaki
(13)
,
Elena Dobrică
(13)
,
Hugues Leroux
(14)
,
Corentin Le Guillou
(14)
,
Damien Jacob
(14)
,
Francisco de la Peña
(14)
,
Sylvain Laforet
(14)
,
Bahae-Eddine Mouloud
(14)
,
Maya Marinova
(15)
,
Pierre Beck
(16)
,
van T. H. Phan
(16)
,
Rolando Rebois
(16)
,
Neyda M. Abreu
(17)
,
Jennifer Gray
(18)
,
Thomas Zega
(19)
,
Pierre‐m. Zanetta
(19)
,
Michelle S. Thompson
(20)
,
Rhonda Stroud
(21)
,
Kate Burgess
(21)
,
Brittany A. Cymes
(21)
,
John C. Bridges
(22)
,
Leon Hicks
(22)
,
Martin R. Lee
(23)
,
Luke Daly
(24, 25, 26)
,
Phil A. Bland
(27)
,
Michael E. Zolensky
(28)
,
David R. Frank
(13)
,
James Martinez
,
Akira Tsuchiyama
(29)
,
Masahiro Yasutake
(30)
,
Junya Matsuno
,
Shota Okumura
(3)
,
Itaru Mitsukawa
(3)
,
Kentaro Uesugi
(30)
,
Masayuki Uesugi
(30)
,
Akihisa Takeuchi
(30)
,
Mingqi Sun
(31)
,
Satomi Enju
(32)
,
Tatsuhiro Michikami
(33)
,
Hisayoshi Yurimoto
(34)
,
Ryuji Okazaki
(35)
,
Hikaru Yabuta
(36)
,
Hiroshi Naraoka
(35)
,
Kanako Sakamoto
(10)
,
Toru Yada
(10)
,
Masahiro Nishimura
(10)
,
Aiko Nakato
(37)
,
Akiko Miyazaki
(10)
,
Kasumi Yogata
(10)
,
Masanao Abe
(10, 38)
,
Tatsuaki Okada
(10, 38)
,
Tomohiro Usui
(10, 38)
,
Makoto Yoshikawa
(10, 38)
,
Takanao Saiki
(10, 38)
,
Satoshi Tanaka
(10, 38)
,
Fuyuto Terui
(39)
,
Satoru Nakazawa
(10, 38)
,
Sei‐ichiro Watanabe
(40)
,
Yuichi Tsuda
(10, 38)
1
Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany]
2 LIST - Luxembourg Institute of Science and Technology
3 Division of Earth and Planetary Sciences [Kyoto]
4 Kyoto University
5 Osaka Metropolitan University
6 Hiroshima University
7 Kochi Institute for Core Sample Research
8 Kyushu University
9 Department of Earth and Planetary Science [Tokyo]
10 ISAS - Institute of Space and Astronautical Science
11 UTokyo - The University of Tokyo
12 Department of Earth and Planetary Materials Science [Sendai]
13 HIGP - Hawaii Institute of Geophysics and Planetology
14 UMET - Unité Matériaux et Transformations - UMR 8207
15 IMEC - Institut Michel Eugène Chevreul - FR 2638
16 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
17 LaRC - NASA Langley Research Center [Hampton]
18 Penn State - Pennsylvania State University
19 LPL - Lunar and Planetary Laboratory [Tucson]
20 EAPS - Department of Earth, Atmospheric, and Planetary Sciences [West Lafayette]
21 NRL - Naval Research Laboratory
22 Space Research Centre [Leicester]
23 School of Geographical and Earth Sciences [Univ Glasgow]
24 University of Oxford
25 UNSW - University of New South Wales [Sydney]
26 School of Geographical and Earth Sciences, University of Glasgow
27 School of Earth and Planetary Sciences [Perth]
28 JSC - NASA Johnson Space Center
29 Ritsumeikan University
30 JASRI - Japan Synchrotron Radiation Research Institute [Hyogo]
31 UCAS - University of Chinese Academy of Sciences [Beijing]
32 Ehime University [Matsuyama, Japon]
33 Kindai University
34 Hokkaido University [Sapporo, Japan]
35 Department of Earth and Planetary Sciences [Fukuoka]
36 Department of Earth and Planetary Systems Science [Hiroshima]
37 NiPR - National Institute of Polar Research [Tokyo]
38 SOKENDAI - Graduate University for Advanced Studies [Hayama]
39 Kanagawa Institute of Technology
40 Nagoya University
2 LIST - Luxembourg Institute of Science and Technology
3 Division of Earth and Planetary Sciences [Kyoto]
4 Kyoto University
5 Osaka Metropolitan University
6 Hiroshima University
7 Kochi Institute for Core Sample Research
8 Kyushu University
9 Department of Earth and Planetary Science [Tokyo]
10 ISAS - Institute of Space and Astronautical Science
11 UTokyo - The University of Tokyo
12 Department of Earth and Planetary Materials Science [Sendai]
13 HIGP - Hawaii Institute of Geophysics and Planetology
14 UMET - Unité Matériaux et Transformations - UMR 8207
15 IMEC - Institut Michel Eugène Chevreul - FR 2638
16 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
17 LaRC - NASA Langley Research Center [Hampton]
18 Penn State - Pennsylvania State University
19 LPL - Lunar and Planetary Laboratory [Tucson]
20 EAPS - Department of Earth, Atmospheric, and Planetary Sciences [West Lafayette]
21 NRL - Naval Research Laboratory
22 Space Research Centre [Leicester]
23 School of Geographical and Earth Sciences [Univ Glasgow]
24 University of Oxford
25 UNSW - University of New South Wales [Sydney]
26 School of Geographical and Earth Sciences, University of Glasgow
27 School of Earth and Planetary Sciences [Perth]
28 JSC - NASA Johnson Space Center
29 Ritsumeikan University
30 JASRI - Japan Synchrotron Radiation Research Institute [Hyogo]
31 UCAS - University of Chinese Academy of Sciences [Beijing]
32 Ehime University [Matsuyama, Japon]
33 Kindai University
34 Hokkaido University [Sapporo, Japan]
35 Department of Earth and Planetary Sciences [Fukuoka]
36 Department of Earth and Planetary Systems Science [Hiroshima]
37 NiPR - National Institute of Polar Research [Tokyo]
38 SOKENDAI - Graduate University for Advanced Studies [Hayama]
39 Kanagawa Institute of Technology
40 Nagoya University
Corentin Le Guillou
- Fonction : Auteur
- PersonId : 1127619
- IdHAL : corentinleguillou
- ORCID : 0000-0002-7118-4607
Pierre‐m. Zanetta
- Fonction : Auteur
- PersonId : 1340865
- IdHAL : pierre-mariezanetta
- ORCID : 0000-0001-8352-2303
James Martinez
- Fonction : Auteur
Junya Matsuno
- Fonction : Auteur
Résumé
Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of hydrous asteroids. The mechanisms of space weathering, its effects on mineral surfaces, and the characteristic time scales on which alteration occurs are central to understanding the spectroscopic properties and the taxonomy of asteroids in the solar system. Here, we investigate the behavior of the iron monosulfides mineral pyrrhotite (Fe1−xS) at the earliest stages of space weathering. Using electron microscopy methods, we identified a partially exposed pyrrhotite crystal that morphologically shows evidence for mass loss due to exposure to solar wind ion irradiation. We find that crystallographic changes to the pyrrhotite can be related to sulfur loss from its space‐exposed surface and the diffusive redistribution of resulting excess iron into the interior of the crystal. Diffusion profiles allow us to estimate an order of magnitude of the exposure time of a few thousand years consistent with previous estimates of space exposure. During this interval, the adjacent phyllosilicates did not acquire discernable damage, suggesting that they are less susceptible to alteration by ion irradiation than pyrrhotite.
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