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1. The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites

Author

Spitzer, Fridolin, Kleine, Thorsten, Burkhardt, Christoph, Hopp, Timo, Yokoyama, Tetsuya, Abe, Yoshinari, Aléon, Jérôme, Alexander, Conel M. O'D., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R., Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Komatani, Shintaro, Krot, Alexander N., Liu, Ming-Chang, Masuda, Yuki, Morita, Mayu, Moynier, Fréderic, Motomura, Kazuko, Nakai, Izumi, Nagashima, Kazuhide, Nguyen, Ann, Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu and CI chondrites formed in a different region of the accretion disk, possibly around the orbits of Uranus and Neptune. We show that, like for Fe, Ryugu and CI chondrites also have indistinguishable Ni isotope anomalies, which differ from those of other carbonaceous chondrites. We propose that this unique Fe and Ni isotopic composition reflects different accretion efficiencies of small FeNi metal grains among the carbonaceous chondrite parent bodies. The CI chondrites incorporated these grains more efficiently, possibly because they formed at the end of the disk's lifetime, when planetesimal formation was also triggered by photoevaporation of the disk. Isotopic variations among carbonaceous chondrites may thus reflect fractionation of distinct dust components from a common reservoir, implying CI chondrites and Ryugu may have formed in the same region of the accretion disk as other carbonaceous chondrites., Comment: Published open access in Science Advances

Published
2024
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2. Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample.

Author

Yokoyama, Tetsuya, Wadhwa, Meenakshi, Iizuka, Tsuyoshi, Rai, Vinai, Gautam, Ikshu, Hibiya, Yuki, Masuda, Yuki, Haba, Makiko, Fukai, Ryota, Hines, Rebekah, Phelan, Nicole, Abe, Yoshinari, Aléon, Jérôme, Alexander, Conel, Amari, Sachiko, Amelin, Yuri, Bajo, Ken-Ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard, Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew, Di Rocco, Tommaso, Fujiya, Wataru, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary, Ichida, Kiyohiro, Ireland, Trevor, Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko, Kitajima, Koki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander, Liu, Ming-Chang, McKeegan, Kevin, Morita, Mayu, Motomura, Kazuko, Moynier, Frédéric, Nakai, Izumi, Nagashima, Kazuhide, Nguyen, Ann, Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Russell, Sara, Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Walker, Richard, Yamashita, Katsuyuki, Yoneda, Shigekazu, Young, Edward, Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-Ichiro, Yoshikawa, Makoto, Tachibana, Shogo, Yurimoto, Hisayoshi, and Yin, Qing-Zhu

Abstract

Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous alteration. Isotopic anomalies could have also been affected by delivery of exogenous clasts and aqueous mobilization of soluble elements. Here, we show that isotopic anomalies for mildly soluble Cr are highly variable in Ryugu and CI chondrites, whereas those of Ti are relatively uniform. This variation in Cr isotope ratios is most likely due to physicochemical fractionation between 54Cr-rich presolar nanoparticles and Cr-bearing secondary minerals at the millimeter-scale in the bulk samples, likely due to extensive aqueous alteration in their parent bodies that occurred [Formula: see text] after Solar System birth. In contrast, Ti isotopes were marginally affected by this process. Our results show that isotopic heterogeneities in asteroids are not all nebular or accretionary in nature but can also reflect element redistribution by water.

Published
2023

3. Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid Ryugu.

Author

Nguyen, Ann, Mane, Prajkta, Keller, Lindsay, Piani, Laurette, Abe, Yoshinari, Aléon, Jérôme, Alexander, Conel, Amari, Sachiko, Amelin, Yuri, Bajo, Ken-Ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard, Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew, Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko, Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary, Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor, Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko, Kitajima, Kouki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander, Liu, Ming-Chang, Masuda, Yuki, McKeegan, Kevin, Morita, Mayu, Motomura, Kazuko, Moynier, Frédéric, Nakai, Izumi, Nagashima, Kazuhide, Nesvorný, David, Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Qin, Liping, Russell, Sara, Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard, Yamashita, Katsuyuki, Yokoyama, Tetsuya, Yoneda, Shigekazu, Young, Edward, Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-Ichiro, Yoshikawa, Makoto, Tachibana, Shogo, Yurimoto, Hisayoshi, and Yin, Qing-Zhu

Subjects
Carbon, Solar System, Meteoroids, Silicates
Abstract

Preliminary analyses of asteroid Ryugu samples show kinship to aqueously altered CI (Ivuna-type) chondrites, suggesting similar origins. We report identification of C-rich, particularly primitive clasts in Ryugu samples that contain preserved presolar silicate grains and exceptional abundances of presolar SiC and isotopically anomalous organic matter. The high presolar silicate abundance (104 ppm) indicates that the clast escaped extensive alteration. The 5 to 10 times higher abundances of presolar SiC (~235 ppm), N-rich organic matter, organics with N isotopic anomalies (1.2%), and organics with C isotopic anomalies (0.2%) in the primitive clasts compared to bulk Ryugu suggest that the clasts formed in a unique part of the protoplanetary disk enriched in presolar materials. These clasts likely represent previously unsampled outer solar system material that accreted onto Ryugu after aqueous alteration ceased, consistent with Ryugus rubble pile origin.

Published
2023

4. Presolar stardust in asteroid Ryugu

Author

Barosch, Jens, Nittler, Larry R., Wang, Jianhua, Alexander, Conel M. O'D., De Gregorio, Bradley T., Engrand, Cécile, Kebukawa, Yoko, Nagashima, Kazuhide, Stroud, Rhonda M., Yabuta, Hikaru, Abe, Yoshinari, Aléon, Jérôme, Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bejach, Laure, Bizzarro, Martin, Bonal, Lydie, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Cody, George D., Dartois, Emmanuel, Dauphas, Nicolas, Davis, Andrew M., Dazzi, Alexandre, Deniset-Besseau, Ariane, Di Rocco, Tommaso, Duprat, Jean, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hashiguchi, Minako, Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R., Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Ito, Motoo, Itoh, Shoichi, Kamide, Kanami, Kawasaki, Noriyuki, Kilcoyne, A. L. David, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Komatani, Shintaro, Komatsu, Mutsumi, Krot, Alexander N., Liu, Ming-Chang, Martins, Zita, Masuda, Yuki, Mathurin, Jérémie, McKeegan, Kevin D., Montagnac, Gilles, Morita, Mayu, Mostefaoui, Smail, Motomura, Kazuko, Moynier, Frédéric, Nakai, Izumi, Nguyen, Ann N., Ohigashi, Takuji, Okumura, Taiga, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Quirico, Eric, Remusat, Laurent, Russell, Sara S., Sakamoto, Naoya, Sandford, Scott A., Schönbächler, Maria, Shigenaka, Miho, Suga, Hiroki, Tafla, Lauren, Takahashi, Yoshio, Takeichi, Yasuo, Tamenori, Yusuke, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Verdier-Paoletti, Maximilien, Wada, Sohei, Wadhwa, Meenakshi, Wakabayashi, Daisuke, Walker, Richard J., Yamashita, Katsuyuki, Yamashita, Shohei, Yin, Qing-Zhu, Yokoyama, Tetsuya, Yoneda, Shigekazu, Young, Edward D., Yui, Hiroharu, Zhang, Ai-Cheng, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nakazawa, Satoru, Nishimura, Masahiro, Okada, Tatsuaki, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yada, Toru, Yogata, Kasumi, Yoshikawa, Makoto, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Tachibana, Shogo, and Yurimoto, Hisayoshi

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate, 1 oxide, 1 O-anomalous supernova grain of ambiguous phase, 38 SiC, and 16 carbonaceous grains. At least two of the carbonaceous grains are presolar graphites, whereas several grains with moderate C isotopic anomalies are probably organics. The presolar silicate was located in a clast with a less altered lithology than the typical extensively aqueously altered Ryugu matrix. The matrix-normalized presolar grain abundances in Ryugu are 4.8$^{+4.7}_{-2.6}$ ppm for O-anomalous grains, 25$^{+6}_{-5}$ ppm for SiC grains and 11$^{+5}_{-3}$ ppm for carbonaceous grains. Ryugu is isotopically and petrologically similar to carbonaceous Ivuna-type (CI) chondrites. To compare the in situ presolar grain abundances of Ryugu with CI chondrites, we also mapped Ivuna and Orgueil samples and found a total of SiC grains and 6 carbonaceous grains. No O-anomalous grains were detected. The matrix-normalized presolar grain abundances in the CI chondrites are similar to those in Ryugu: 23 $^{+7}_{-6}$ ppm SiC and 9.0$^{+5.3}_{-4.6}$ ppm carbonaceous grains. Thus, our results provide further evidence in support of the Ryugu-CI connection. They also reveal intriguing hints of small-scale heterogeneities in the Ryugu samples, such as locally distinct degrees of alteration that allowed the preservation of delicate presolar material., Comment: 12 pages, 3 figures, 2 tables. Published in ApJL

Published
2022
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5. Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2

Author

Kawasaki, Noriyuki, Nagashima, Kazuhide, Sakamoto, Naoya, Matsumoto, Toru, Bajo, Ken-ichi, Wada, Sohei, Igami, Yohei, Miyake, Akira, Noguchi, Takaaki, Yamamoto, Daiki, Russell, Sara S, Abe, Yoshinari, Aléon, Jérôme, Alexander, Conel M O’D, Amari, Sachiko, Amelin, Yuri, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W, Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M, Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K, Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R, Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R, Ishikawa, Akira, Ito, Motoo, Itoh, Shoichi, Kita, Noriko T, Kitajima, Kouki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander N, Liu, Ming-Chang, Masuda, Yuki, McKeegan, Kevin D, Morita, Mayu, Motomura, Kazuko, Moynier, Frédéric, Nakai, Izumi, Nguyen, Ann, Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wadhwa, Meenakshi, Walker, Richard J, Yamashita, Katsuyuki, Yin, Qing-Zhu, Yokoyama, Tetsuya, Yoneda, Shigekazu, Young, Edward D, Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Subjects
Earth Sciences, Physical Sciences, Space Sciences, Geology, Prevention
Abstract

The extraterrestrial materials returned from asteroid (162173) Ryugu consist predominantly of low-temperature aqueously formed secondary minerals and are chemically and mineralogically similar to CI (Ivuna-type) carbonaceous chondrites. Here, we show that high-temperature anhydrous primary minerals in Ryugu and CI chondrites exhibit a bimodal distribution of oxygen isotopic compositions: 16O-rich (associated with refractory inclusions) and 16O-poor (associated with chondrules). Both the 16O-rich and 16O-poor minerals probably formed in the inner solar protoplanetary disk and were subsequently transported outward. The abundance ratios of the 16O-rich to 16O-poor minerals in Ryugu and CI chondrites are higher than in other carbonaceous chondrite groups but are similar to that of comet 81P/Wild2, suggesting that Ryugu and CI chondrites accreted in the outer Solar System closer to the accretion region of comets.

Published
2022

8. Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration

Author

Yui, Hiroharu, Urashima, Shu-hei, Onose, Morihiko, Morita, Mayu, Komatani, Shintaro, Nakai, Izumi, Abe, Yoshinari, Terada, Yasuko, Homma, Hisashi, Motomura, Kazuko, Ichida, Kiyohiro, Yokoyama, Tetsuya, Nagashima, Kazuhide, Aléon, Jérôme, M. O’D. Alexander, Conel, Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Hoppe, Peter, Huss, Gary R., Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Krot, Sasha, Liu, Ming-Chang, Masuda, Yuki, Moynier, Frédéric, Nguyen, Ann, Nittler, Larry, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Di Rocco, Tommaso, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Published
2024
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9. A Reassessment of the Quasi-Simultaneous Arrival Effect in Secondary Ion Mass Spectrometry

Author

Ogliore, Ryan, Nagashima, Kazuhide, Huss, Gary, and Haenecour, Pierre

Subjects
Physics - Instrumentation and Detectors
Abstract

Quasi-simultaneous arrival (QSA) effects in secondary ion mass spectrometry can create mass-indepedent inaccuracies in isotope measurements when using electron multiplier detectors (EMs). The simple Poisson statistical model of QSA does not explain most experimental data. We present pulse-height distributions (PHDs) and time-series measurements to better study QSA. Our data show that PHDs and the distribution of multiple arrivals on the EM are not consistent with the Poisson model. Multiple arrivals are over-dispersed compared to Poisson and are closer to a negative binomial distribution. Through an emission-transmission-detection model we show that the QSA correction depends on the non-Poisson emission of multiple secondary ions, the secondary ion energy distribution, and other factors, making an analytical correction impractical. A standards-based correction for QSA is the best approach, and we show the proper way to calculate standards-normalized $\delta$ values to minimize the effect of QSA., Comment: In press at Nuclear Inst. and Methods in Physics Research, B

Published
2021
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10. Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites

Author

Hu, Yan, Moynier, Frédéric, Dai, Wei, Paquet, Marine, Yokoyama, Tetsuya, Abe, Yoshinari, Aléon, Jérôme, Alexander, Conel M. O'D., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R., Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Koki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander N., Liu, Ming-Chang, Masuda, Yuki, Morita, Mayu, Motomura, Kazuko, Nakai, Izumi, Nagashima, Kazuhide, Nesvorný, David, Nguyen, Ann, Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Published
2024
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12. A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu

Author

Noguchi, Takaaki, Matsumoto, Toru, Miyake, Akira, Igami, Yohei, Haruta, Mitsutaka, Saito, Hikaru, Hata, Satoshi, Seto, Yusuke, Miyahara, Masaaki, Tomioka, Naotaka, Ishii, Hope A., Bradley, John P., Ohtaki, Kenta K., Dobrică, Elena, Leroux, Hugues, Le Guillou, Corentin, Jacob, Damien, de la Peña, Francisco, Laforet, Sylvain, Marinova, Maya, Langenhorst, Falko, Harries, Dennis, Beck, Pierre, Phan, Thi H. V., Rebois, Rolando, Abreu, Neyda M., Gray, Jennifer, Zega, Thomas, Zanetta, Pierre-M., Thompson, Michelle S., Stroud, Rhonda, Burgess, Kate, Cymes, Brittany A., Bridges, John C., Hicks, Leon, Lee, Martin R., Daly, Luke, Bland, Phil A., Zolensky, Michael E., Frank, David R., Martinez, James, Tsuchiyama, Akira, Yasutake, Masahiro, Matsuno, Junya, Okumura, Shota, Mitsukawa, Itaru, Uesugi, Kentaro, Uesugi, Masayuki, Takeuchi, Akihisa, Sun, Mingqi, Enju, Satomi, Takigawa, Aki, Michikami, Tatsuhiro, Nakamura, Tomoki, Matsumoto, Megumi, Nakauchi, Yusuke, Abe, Masanao, Arakawa, Masahiko, Fujii, Atsushi, Hayakawa, Masahiko, Hirata, Naru, Hirata, Naoyuki, Honda, Rie, Honda, Chikatoshi, Hosoda, Satoshi, Iijima, Yu-ichi, Ikeda, Hitoshi, Ishiguro, Masateru, Ishihara, Yoshiaki, Iwata, Takahiro, Kawahara, Kousuke, Kikuchi, Shota, Kitazato, Kohei, Matsumoto, Koji, Matsuoka, Moe, Mimasu, Yuya, Miura, Akira, Morota, Tomokatsu, Nakazawa, Satoru, Namiki, Noriyuki, Noda, Hirotomo, Noguchi, Rina, Ogawa, Naoko, Ogawa, Kazunori, Okada, Tatsuaki, Okamoto, Chisato, Ono, Go, Ozaki, Masanobu, Saiki, Takanao, Sakatani, Naoya, Sawada, Hirotaka, Senshu, Hiroki, Shimaki, Yuri, Shirai, Kei, Sugita, Seiji, Takei, Yuto, Takeuchi, Hiroshi, Tanaka, Satoshi, Tatsumi, Eri, Terui, Fuyuto, Tsukizaki, Ryudo, Wada, Koji, Yamada, Manabu, Yamada, Tetsuya, Yamamoto, Yukio, Yano, Hajime, Yokota, Yasuhiro, Yoshihara, Keisuke, Yoshikawa, Makoto, Yoshikawa, Kent, Fukai, Ryohta, Furuya, Shizuho, Hatakeda, Kentaro, Hayashi, Tasuku, Hitomi, Yuya, Kumagai, Kazuya, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Soejima, Hiromichi, Suzuki, Ayako I., Usui, Tomohiro, Yada, Toru, Yamamoto, Daiki, Yogata, Kasumi, Yoshitake, Miwa, Connolly, Jr, Harold C., Lauretta, Dante S., Yurimoto, Hisayoshi, Nagashima, Kazuhide, Kawasaki, Noriyuki, Sakamoto, Naoya, Okazaki, Ryuji, Yabuta, Hikaru, Naraoka, Hiroshi, Sakamoto, Kanako, Tachibana, Shogo, Watanabe, Sei-ichiro, and Tsuda, Yuichi

Published
2023
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13. Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis

Author

Paquet, Marine, Moynier, Frederic, Yokoyama, Tetsuya, Dai, Wei, Hu, Yan, Abe, Yoshinari, Aléon, Jérôme, O’D. Alexander, Conel M., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R., Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Ito, Motoo, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander N., Liu, Ming-Chang, Masuda, Yuki, McKeegan, Kevin D., Morita, Mayu, Motomura, Kazuko, Nakai, Izumi, Nagashima, Kazuhide, Nesvorný, David, Nguyen, Ann N., Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Published
2023
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14. Oxygen Isotopic Composition of an Enstatite Ribbon of Probable Cometary Origin

Author

Ogliore, Ryan C., Brownlee, Donald E., Nagashima, Kazuhide, Joswiak, Dave J., Lewis, Josiah B., Krot, Alexander N., Ut, Kainen L., and Huss, Gary R.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Filamentary enstatite crystals are found in interplanetary dust particles of likely cometary origin but are very rare or absent in meteorites. Crystallographic characteristics of filamentary enstatites indicate that they condensed directly from vapor. We measured the O isotopic composition of an enstatite ribbon from a giant cluster interplanetary dust particle to be $\delta^{18}\rm{O}{=25{\pm}55}$, $\delta^{17}\rm{O}{=-19{\pm}129}$, $\Delta^{17}\rm{O}{=-32{\pm}134}$ (2$\sigma$ errors), which is inconsistent at the 2$\sigma$ level with the composition of the Sun inferred from the Genesis solar wind measurements. The particle's O isotopic composition, consistent with the terrestrial composition, implies that it condensed from a gas of non-solar O isotopic composition, possibly as a result of vaporization of disk region enriched in $^{16}$O-depleted solids. The relative scarcity of filamentary enstatite in asteroids compared to comets implies either that this crystal condensed from dust vaporized \textit{in-situ} in the outer Solar System where comets formed, or it condensed in the inner Solar System and was subsequently transported outward to the comet-forming region.

Published
2019
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19. Louisfuchsite, Ca2(Mg4Ti2)(Al4Si2)O20, a new rhönite-type mineral from the NWA 4964 CK meteorite: A refractory phase from the solar nebula.

Author

Ma, Chi, Krot, Alexander N., Nagashima, Kazuhide, and Dunn, Tasha

Subjects
ELECTRON probe microanalysis, SPHENE, METEORITES, ELECTRON diffraction, ILMENITE
Abstract

Louisfuchsite (IMA 2022-024), with an end-member formula Ca2(Mg4Ti2)(Al4Si2)O20, is a new refractory mineral identified in a Ca-Al-rich inclusion (CAI) from the NWA 4964 CK3.8 carbonaceous chondrite. Louisfuchsite occurs with spinel, perovskite, grossmanite, plus secondary rutile, titanite, and ilmenite in three regions in the CAI. The mean chemical composition of type louisfuchsite by electron probe microanalysis is (wt%) Al2O3 25.48, SiO2 18.40, MgO 17.92, TiO2 15.36, Ti2O3 3.13, CaO 14.92, FeO 3.30, V2O3 0.67, Cr2O3 0.08, total 99.26, giving rise to an empirical formula of C a 2.00 (M g 3.44 T i 1.49 4 + F e 0.36 T i 0.34 3 + A l 0.24 V 0.07 3 + C a 0.06 C r 0.01 ) Σ 6.01 (A l 3.63 S i 2.37 ) Σ 6.00 O 20 . Louisfuchsite has the P 1 rhönite structure with a = 10.37(1) Å, b = 10.76(1) Å, c = 8.90(1) Å, α = 106.0(1)°, β = 96.0(1)°, γ= 124.7(1)°, V = 741(2) Å3, and Z = 2, as revealed by electron backscatter diffraction. The calculated density using the measured composition is 3.44 g/cm3. Louisfuchsite is a new refractory phase from the solar nebula, crystallized from an 16O-rich (Δ17O ~ –24 ± 2‰) refractory melt with the initial 26Al/27Al ratio of (5.09 ± 0.58) × 10–5 under reduced conditions. The mineral name is in honor of Louis Fuchs (1915–1991), a mineralogist at Argonne National Laboratory, for his many contributions to mineralogical research on meteorites. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples

Author

Kita, Noriko T., primary, Kitajima, Kouki, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamoto, Naoya, additional, Fujiya, Wataru, additional, Abe, Yoshinari, additional, Aléon, Jérôme, additional, Alexander, Conel M. O'D., additional, Amari, Sachiko, additional, Amelin, Yuri, additional, Bajo, Ken‐ichi, additional, Bizzarro, Martin, additional, Bouvier, Audrey, additional, Carlson, Richard W., additional, Chaussidon, Marc, additional, Choi, Byeon‐Gak, additional, Dauphas, Nicolas, additional, Davis, Andrew M., additional, Di Rocco, Tommaso, additional, Fukai, Ryota, additional, Gautam, Ikshu, additional, Haba, Makiko K., additional, Hibiya, Yuki, additional, Hidaka, Hiroshi, additional, Homma, Hisashi, additional, Hoppe, Peter, additional, Huss, Gary R., additional, Ichida, Kiyohiro, additional, Iizuka, Tsuyoshi, additional, Ireland, Trevor R., additional, Ishikawa, Akira, additional, Itoh, Shoichi, additional, Kleine, Thorsten, additional, Komatani, Shintaro, additional, Krot, Alexander N., additional, Liu, Ming‐Chang, additional, Masuda, Yuki, additional, McKeegan, Kevin D., additional, Morita, Mayu, additional, Motomura, Kazuko, additional, Moynier, Frédéric, additional, Nakai, Izumi, additional, Nguyen, Ann, additional, Nittler, Larry, additional, Onose, Morihiko, additional, Pack, Andreas, additional, Park, Changkun, additional, Piani, Laurette, additional, Qin, Liping, additional, Russell, Sara S., additional, Schönbächler, Maria, additional, Tafla, Lauren, additional, Tang, Haolan, additional, Terada, Kentaro, additional, Terada, Yasuko, additional, Usui, Tomohiro, additional, Wada, Sohei, additional, Wadhwa, Meenakshi, additional, Walker, Richard J., additional, Yamashita, Katsuyuki, additional, Yin, Qing‐Zhu, additional, Yokoyama, Tetsuya, additional, Yoneda, Shigekazu, additional, Young, Edward D., additional, Yui, Hiroharu, additional, Zhang, Ai‐Cheng, additional, Nakamura, Tomoki, additional, Naraoka, Hiroshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Sakamoto, Kanako, additional, Yabuta, Hikaru, additional, Abe, Masanao, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Okada, Tatsuaki, additional, Yada, Toru, additional, Yogata, Kasumi, additional, Nakazawa, Satoru, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Tsuda, Yuichi, additional, Watanabe, Sei‐ichiro, additional, Yoshikawa, Makoto, additional, Tachibana, Shogo, additional, and Yurimoto, Hisayoshi, additional

Published
2024
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22. Author Correction: Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis

Author

Paquet, Marine, Moynier, Frederic, Yokoyama, Tetsuya, Dai, Wei, Hu, Yan, Abe, Yoshinari, Aléon, Jérôme, O’D. Alexander, Conel M., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Di Rocco, Tommaso, Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Homma, Hisashi, Hoppe, Peter, Huss, Gary R., Ichida, Kiyohiro, Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Ito, Motoo, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Komatani, Shintaro, Krot, Alexander N., Liu, Ming-Chang, Masuda, Yuki, McKeegan, Kevin D., Morita, Mayu, Motomura, Kazuko, Nakai, Izumi, Nagashima, Kazuhide, Nesvorný, David, Nguyen, Ann N., Nittler, Larry, Onose, Morihiko, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Terada, Yasuko, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Yui, Hiroharu, Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Published
2023
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23. Louisfuchsite, Ca2(Mg4Ti2)(Al4Si2)O20, a new rhönite-type mineral from the NWA 4964 CK meteorite: A refractory phase from the solar nebula

Author

Ma, Chi, Krot, Alexander N., Nagashima, Kazuhide, and Dunn, Tasha

Abstract

Louisfuchsite (IMA 2022-024), with an end-member formula Ca2(Mg4Ti2)(Al4Si2)O20, is a new refractory mineral identified in a Ca-Al-rich inclusion (CAI) from the NWA 4964 CK3.8 carbonaceous chondrite. Louisfuchsite occurs with spinel, perovskite, grossmanite, plus secondary rutile, titanite, and ilmenite in three regions in the CAI. The mean chemical composition of type louisfuchsite by electron probe microanalysis is (wt%) Al2O325.48, SiO218.40, MgO 17.92, TiO215.36, Ti2O33.13, CaO 14.92, FeO 3.30, V2O30.67, Cr2O30.08, total 99.26, giving rise to an empirical formula of Ca2.00(Mg3.44Ti1.494+Fe0.36Ti0.343+Al0.24V0.073+Ca0.06Cr0.01)Σ6.01(Al3.63Si2.37)Σ6.00O20$\begin{array}{} \displaystyle \mathrm{Ca_{2.00}(Mg_{3.44}Ti_{1.49}^{4+}Fe_{0.36}Ti_{0.34}^{3+}Al_{0.24}V_{0.07}^{3+}Ca_{0.06}Cr_{0.01})_{\Sigma6.01}(Al_{3.63}Si_{2.37})_{\Sigma 6.00}O_{20}} \end{array}$. Louisfuchsite has the P1rhönite structure with a= 10.37(1) Å, b= 10.76(1) Å, c= 8.90(1) Å, α = 106.0(1)°, β = 96.0(1)°, γ = 124.7(1)°, V= 741(2) Å3, and Z = 2, as revealed by electron backscatter diffraction. The calculated density using the measured composition is 3.44 g/cm3. Louisfuchsite is a new refractory phase from the solar nebula, crystallized from an 16O-rich (Δ17O ~ –24 ± 2‰) refractory melt with the initial 26Al/27Al ratio of (5.09 ± 0.58) × 10–5under reduced conditions. The mineral name is in honor of Louis Fuchs (1915–1991), a mineralogist at Argonne National Laboratory, for his many contributions to mineralogical research on meteorites.

Published
2024
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24. Analysis of Cation Composition in Dolomites on the Intact Particles Sampled from Asteroid Ryugu

Author

Morita, Mayu, Yui, Hiroharu, Urashima, Shu Hei, Onose, Morihiko, Komatani, Shintaro, Nakai, Izumi, Abe, Yoshinari, Terada, Yasuko, Homma, Hisashi, Motomura, Kazuko, Ichida, Kiyohiro, Yokoyama, Tetsuya, Nagashima, Kazuhide, Aléon, Jérôme, Conel, Conel M., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Hoppe, Peter, Huss, Gary R., Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Krot, Sasha, Liu, Ming-Chang, Masuda, Yuki, Moynier, Frédéric, Nguyen, Ann, Nittler, Larry, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Rocco, Tommaso Di, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, Yurimoto, Hisayoshi, Morita, Mayu, Yui, Hiroharu, Urashima, Shu Hei, Onose, Morihiko, Komatani, Shintaro, Nakai, Izumi, Abe, Yoshinari, Terada, Yasuko, Homma, Hisashi, Motomura, Kazuko, Ichida, Kiyohiro, Yokoyama, Tetsuya, Nagashima, Kazuhide, Aléon, Jérôme, Conel, Conel M., Amari, Sachiko, Amelin, Yuri, Bajo, Ken-ichi, Bizzarro, Martin, Bouvier, Audrey, Carlson, Richard W., Chaussidon, Marc, Choi, Byeon-Gak, Dauphas, Nicolas, Davis, Andrew M., Fujiya, Wataru, Fukai, Ryota, Gautam, Ikshu, Haba, Makiko K., Hibiya, Yuki, Hidaka, Hiroshi, Hoppe, Peter, Huss, Gary R., Iizuka, Tsuyoshi, Ireland, Trevor R., Ishikawa, Akira, Itoh, Shoichi, Kawasaki, Noriyuki, Kita, Noriko T., Kitajima, Kouki, Kleine, Thorsten, Krot, Sasha, Liu, Ming-Chang, Masuda, Yuki, Moynier, Frédéric, Nguyen, Ann, Nittler, Larry, Pack, Andreas, Park, Changkun, Piani, Laurette, Qin, Liping, Rocco, Tommaso Di, Russell, Sara S., Sakamoto, Naoya, Schönbächler, Maria, Tafla, Lauren, Tang, Haolan, Terada, Kentaro, Usui, Tomohiro, Wada, Sohei, Wadhwa, Meenakshi, Walker, Richard J., Yamashita, Katsuyuki, Yin, Qing-Zhu, Yoneda, Shigekazu, Young, Edward D., Zhang, Ai-Cheng, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Sakamoto, Kanako, Yabuta, Hikaru, Abe, Masanao, Miyazaki, Akiko, Nakato, Aiko, Nishimura, Masahiro, Okada, Tatsuaki, Yada, Toru, Yogata, Kasumi, Nakazawa, Satoru, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Tsuda, Yuichi, Watanabe, Sei-ichiro, Yoshikawa, Makoto, Tachibana, Shogo, and Yurimoto, Hisayoshi

Abstract

Characterization of the elemental distribution of samples with rough surfaces has been strongly desired for the analysis of various natural and artificial materials. Particularly for pristine and rare analytes with micrometer sizes embedded on specimen surfaces, non-invasive and matrix effect-free analysis is required without surface polishing treatment. To satisfy these requirements, we proposed a new method employing the sequential combination of two imaging modalities, i.e., microenergy-dispersive X-ray fluorescence (micro-XRF) and Raman micro-spectroscopy. The applicability of the developed method is tested by the quantitative analysis of cation composition in micrometer-sized carbonate grains on the surfaces of intact particles sampled directly from the asteroid Ryugu. The first step of micro-XRF imaging enabled a quick search for the sparsely scattered and micrometer-sized carbonates by the codistributions of Ca2+ and Mn2+ on the Mg2+- and Fe2+-rich phyllosilicate matrix. The following step of Raman micro-spectroscopy probed the carbonate grains and analyzed their cation composition (Ca2+, Mg2+, and Fe2+ + Mn2+) in a matrix effect-free manner via the systematic Raman shifts of the lattice modes. The carbonates were basically assigned to ferroan dolomite bearing a considerable amount of Fe2+ + Mn2+ at around 10 atom %. These results are in good accordance with the assignments reported by scanning electron microscopy-energy-dispersive X-ray spectroscopy, where the thin-sectioned and surface-polished Ryugu particles were applicable. The proposed method requires neither sectioning nor surface polishing; hence, it can be applied to the remote sensing apparatus on spacecrafts and planetary rovers. Furthermore, the non-invasive and matrix effect-free characterization will provide a reliable analytical tool for quantitative analysis of the elemental distrib

Published
2024

25. Mineralogy, petrology, and oxygen isotopic compositions of chondritic and achondritic lithologies in the anomalous CB carbonaceous chondrites Sierra Gorda 013 and Fountain Hills

Author

Krot, Alexander N., Nagashima, Kazuhide, Ivanova, Marina A., Lauretta, Dante, Libourel, Guy, Johnson, Brandon C., Brenker, Frank E., Hoffman, Viktoria, Bizzarro, Martin, Krot, Alexander N., Nagashima, Kazuhide, Ivanova, Marina A., Lauretta, Dante, Libourel, Guy, Johnson, Brandon C., Brenker, Frank E., Hoffman, Viktoria, and Bizzarro, Martin

Abstract

The CB (Bencubbin-like) metal-rich carbonaceous chondrites are subdivided into the CBa and CBb subgroups. The CBa chondrites are composed predominantly of ~cm-sized skeletal olivine chondrules and unzoned Fe,Ni-metal ± troilite nodules. The CBb chondrites are finer grained than the CBas and consist of chemically zoned and unzoned Fe,Ni-metal grains, Fe,Ni-metal ± troilite nodules, cryptocrystalline and skeletal olivine chondrules, and rare refractory inclusions. Both subgroups contain exceptionally rare porphyritic chondrules and no interchondrule fine-grained matrix, and are interpreted as the products of a gas–melt impact plume formed by a high-velocity collision between differentiated planetesimals about 4562 Ma. The anomalous metal-rich carbonaceous chondrites, Fountain Hills and Sierra Gorda 013 (SG 013), have bulk oxygen isotopic compositions similar to those of other CBs but contain coarse-grained igneous clasts/porphyritic chondrule-like objects composed of olivine, low-Ca-pyroxene, and minor plagioclase and high-Ca pyroxene as well as barred olivine and skeletal olivine chondrules. Cryptocrystalline chondrules, zoned Fe,Ni-metal grains, and interchondrule fine-grained matrix are absent. In SG 013, Fe,Ni-metal (~80 vol%) occurs as several mm-sized nodules; magnesiochromite (Mg-chromite) is accessory; daubréelite and schreibersite are minor; troilite is absent. In Fountain Hills, Fe,Ni-metal (~25 vol%) is dispersed between chondrules and silicate clasts; chromite and sulfides are absent. In addition to a dominant chondritic lithology, SG 013 contains a chondrule-free lithology composed of Fe,Ni-metal nodules (~25 vol%), coarse-grained olivine and low-Ca pyroxene, interstitial high-Ca pyroxene and anorthitic plagioclase, and Mg-chromite. Here, we report on oxygen isotopic compositions of olivine, low-Ca pyroxene, and ±Mg-chromite in Fountain Hills and both lithologies of SG 013 measured in situ using an

Published
2024

26. Oxygen Isotopic Composition of Coarse- and Fine-grained Material from Comet 81P/Wild 2

Author

Ogliore, Ryan C., Nagashima, Kazuhide, Huss, Gary R., Westphal, Andrew J., Gainsforth, Zack, and Butterworth, Anna L.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Individual particles from comet 81P/Wild 2 collected by NASA's Stardust mission vary in size from small sub-$\mu$m fragments found in the walls of the aerogel tracks, to large fragments up to tens of $\mu$m in size found towards the termini of tracks. The comet, in an orbit beyond Neptune since its formation, retains an intact a record of early-Solar-System processes that was compromised in asteroidal samples by heating and aqueous alteration. We measured the O isotopic composition of seven Stardust fragments larger than $\sim$2 $\mu$m extracted from five different Stardust aerogel tracks, and 63 particles smaller than $\sim$2 $\mu$m from the wall of a Stardust track. The larger particles show a relatively narrow range of O isotopic compositions that is consistent with $^{16}$O-poor phases commonly seen in meteorites. Many of the larger Stardust fragments studied so far have chondrule-like mineralogy which is consistent with formation in the inner Solar System. The fine-grained material shows a very broad range of O isotopic compositions ($-70<\Delta^{17}$O$<+60$) suggesting that Wild 2 fines are either primitive outer-nebula dust or a very diverse sampling of inner Solar System compositional reservoirs that accreted along with a large number of inner-Solar-System rocks to form comet Wild 2.

Published
2015
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32. In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain

Author

Phan, Van T. H., primary, Beck, Pierre, additional, Rebois, Rolando, additional, Quirico, Eric, additional, Noguchi, Takaaki, additional, Matsumoto, Toru, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Ishii, Hope A., additional, Bradley, John P., additional, Ohtaki, Kenta K., additional, Dobrică, Elena, additional, Leroux, Hugues, additional, Le Guillou, Corentin, additional, Jacob, Damien, additional, de la Peña, Francisco, additional, Laforet, Sylvain, additional, Marinova, Maya, additional, Langenhorst, Falko, additional, Harries, Dennis, additional, Abreu, Neyda M., additional, Gray, Jennifer, additional, Zega, Thomas, additional, Zanetta, Pierre‐M., additional, Thompson, Michelle S., additional, Stroud, Rhonda, additional, Mathurin, Jérémie, additional, Dazzi, Alexandre, additional, Dartois, Emmanuel, additional, Engrand, Cécile, additional, Burgess, Kate, additional, Cymes, Brittany A., additional, Bridges, John C., additional, Hicks, Leon, additional, Lee, Martin R., additional, Daly, Luke, additional, Bland, Phil A., additional, Zolensky, Michael E., additional, Frank, David R., additional, Martinez, James, additional, Tsuchiyama, Akira, additional, Yasutake, Masahiro, additional, Matsuno, Junya, additional, Okumura, Shota, additional, Mitsukawa, Itaru, additional, Uesugi, Kentaro, additional, Uesugi, Masayuki, additional, Takeuchi, Akihisa, additional, Sun, Mingqi, additional, Enju, Satomi, additional, Takigawa, Aki, additional, Michikami, Tatsuhiro, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Nakauchi, Yusuke, additional, Abe, Masanao, additional, Nakazawa, Satoru, additional, Okada, Tatsuaki, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Yoshikawa, Makoto, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Usui, Tomohiro, additional, Yada, Toru, additional, Yurimoto, Hisayoshi, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamotoa, Naoya, additional, Hoppe, Peter, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Sei‐ichiro, additional, and Tsuda, Yuichi, additional

Published
2024
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33. Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples

Author

Mouloud, Bahae‐eddine, primary, Jacob, Damien, additional, de la Peña, Francisco, additional, Marinova, Maya, additional, Le Guillou, Corentin, additional, Viennet, Jean‐Christophe, additional, Laforet, Sylvain, additional, Leroux, Hugues, additional, Teurtrie, Adrien, additional, Noguchi, Takaaki, additional, Matsumoto, Toru, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Ishii, Hope A., additional, Bradley, John P., additional, Ohtaki, Kenta K., additional, Dobrica, Elena, additional, Langenhorst, Falko, additional, Harries, Dennis, additional, Beck, Pierre, additional, Phan, Thi H. V., additional, Rebois, Rolando, additional, Abreu, Neyda M., additional, Gray, Jennifer, additional, Zega, Thomas, additional, Zanetta, Pierre‐M., additional, Thompson, Michelle S., additional, Stroud, Rhonda, additional, Burgess, Kate, additional, Cymes, Brittany A., additional, Bridges, John C., additional, Hicks, Leon, additional, Lee, Martin R., additional, Daly, Luke, additional, Bland, Phil A., additional, Zolensky, Michael E., additional, Frank, David R., additional, Martinez, James, additional, Tsuchiyama, Akira, additional, Yasutake, Masahiro, additional, Matsuno, Junya, additional, Okumura, Shota, additional, Mitsukawa, Itaru, additional, Uesugi, Kentaro, additional, Uesugi, Masayuki, additional, Takeuchi, Akihisa, additional, Sun, Mingqi, additional, Enju, Satomi, additional, Takigawa, Aki, additional, Michikami, Tatsuhiro, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Nakauchi, Yusuke, additional, Abe, Masanao, additional, Nakazawa, Satoru, additional, Okada, Tatsuaki, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Yoshikawa, Makoto, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Usui, Tomohiro, additional, Yada, Toru, additional, Yurimoto, Hisayoshi, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamotoa, Naoya, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Sei‐ichiro, additional, and Tsuda, Yuichi, additional

Published
2024
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34. Neodymium‐142 deficits and samarium neutron stratigraphy of C‐type asteroid (162173) Ryugu

Author

Torrano, Zachary A., primary, Jordan, Michelle K., additional, Mock, Timothy D., additional, Carlson, Richard W., additional, Gautam, Ikshu, additional, Haba, Makiko K., additional, Yokoyama, Tetsuya, additional, Abe, Yoshinari, additional, Aléon, Jérôme, additional, Alexander, Conel, additional, Amari, Sachiko, additional, Amelin, Yuri, additional, Bajo, Ken‐ichi, additional, Bizzarro, Martin, additional, Bouvier, Audrey, additional, Chaussidon, Marc, additional, Choi, Byeon‐Gak, additional, Dauphas, Nicolas, additional, Davis, Andrew M., additional, Di Rocco, Tommaso, additional, Fujiya, Wataru, additional, Fukai, Ryota, additional, Hibiya, Yuki, additional, Hidaka, Hiroshi, additional, Homma, Hisashi, additional, Hoppe, Peter, additional, Huss, Gary R., additional, Ichida, Kiyohiro, additional, Iizuka, Tsuyoshi, additional, Ireland, Trevor, additional, Ishikawa, Akira, additional, Itoh, Shoichi, additional, Kawasaki, Noriyuki, additional, Kita, Noriko T., additional, Kitajima, Koki, additional, Kleine, Thorsten, additional, Komatani, Shintaro, additional, Krot, Alexander N., additional, Liu, Ming‐Chang, additional, Masuda, Yuki, additional, McKeegan, Kevin D., additional, Morita, Mayu, additional, Motomura, Kazuko, additional, Moynier, Frédéric, additional, Nakai, Izumi, additional, Nagashima, Kazuhide, additional, Nguyen, Ann, additional, Nittler, Larry, additional, Onose, Morihiko, additional, Pack, Andreas, additional, Park, Changkun, additional, Piani, Laurette, additional, Qin, Liping, additional, Russell, Sara, additional, Sakamoto, Naoya, additional, Schönbächler, Maria, additional, Tafla, Lauren, additional, Tang, Haolan, additional, Terada, Kentaro, additional, Terada, Yasuko, additional, Usui, Tomohiro, additional, Wada, Sohei, additional, Wadhwa, Meenakshi, additional, Walker, Richard J., additional, Yamashita, Katsuyuki, additional, Yin, Qing‐Zhu, additional, Yoneda, Shigekazu, additional, Young, Edward D., additional, Yui, Hiroharu, additional, Zhang, Ai‐Cheng, additional, Nakamura, Tomoki, additional, Naraoka, Hiroshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Sakamoto, Kanako, additional, Yabuta, Hikaru, additional, Abe, Masanao, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Okada, Tatsuaki, additional, Yada, Toru, additional, Yogata, Kasumi, additional, Nakazawa, Satoru, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Tsuda, Yuichi, additional, Watanabe, Sei‐ichiro, additional, Yoshikawa, Makoto, additional, Tachibana, Shogo, additional, and Yurimoto, Hisayoshi, additional

Published
2023
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40. Heterogeneous distribution of Al-26 at the birth of the Solar System

Author

Makide, Kentaro, Nagashima, Kazuhide, Krot, Alexander N., Huss, Gary R., Ciesla, Fred J., Hellebrand, Eric, Gaidos, Eric, and Yang, Le

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

It is believed that Al-26, a short-lived (t1/2 = 0.73 Ma) and now extinct radionuclide, was uniformly distributed in the nascent Solar System with the initial Al-26/Al-27 ratio of ~5.2\times10-5, suggesting its external stellar origin. However, the stellar source of Al-26 and the manner in which it was injected into the solar system remain controversial: the Al-26 could have been produced by an asymptotic giant branch star, a supernova, or a Wolf-Rayet star and injected either into the protosolar molecular cloud or protoplanetary disk. Corundum (Al2O3) is thermodynamically predicted to be the first condensate from a cooling gas of solar composition. Here we show that micron-sized corundum condensates from O-16-rich gas (Big Delta O-17 ~ -25%) of solar composition recorded heterogeneous distribution of Al-26 at the birth of the solar system: the inferred initial Al-26/Al-27 ratio ranges from ~6.5x10-5 to <2x10-6; ~50% of the corundum grains measured are Al-26-poor. Other Al-26-poor, O-16-rich refractory objects include grossite (CaAl4O7)- and hibonite(CaAl12O19)-rich calcium-aluminum-rich inclusions (CAIs) in CH chondrites, platy hibonite crystals in CM chondrites, and FUN (fractionation and unidentified nuclear isotopic anomalies) CAIs in CV, CO, and CR chondrites. Considering the apparently early and short duration (<0.3 Ma) of condensation of refractory O-16-rich solids in the solar system, we infer that Al-26 was injected into the collapsing protosolar molecular cloud and later homogenized in the protoplanetary disk. The apparent lack of correlation between Al-26 abundance and O-isotope compositions of corundum grains put important constraints on the stellar source of Al-26 in the solar system., Comment: Astrophysical Journal Letters 733, L31

Published
2011
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41. Oxygen Isotopic Variations in the Calcium, Aluminum-rich Inclusion–forming Region Recorded by a Single Refractory Inclusion from the CO3.1 Carbonaceous Chondrite Dar al Gani 083.

Author

Ebert, Samuel, Nagashima, Kazuhide, Krot, Alexander N., Patzek, Markus, and Bischoff, Addi

Subjects
*CHONDRITES, *ASTEROIDS, *CALCIUM, *MINERALOGY, *SOLAR system, *MINERALS, *SIDEROPHILE elements
Abstract

Calcium, aluminum-rich inclusions (CAIs) are the oldest solids dated that formed in the solar system. Most CAIs in unmetamorphosed chondritic meteorites (chondrites; petrologic type ≤3.0) have uniform solar-like 16O-rich compositions (Δ17O ∼ −24‰) and a high initial 26Al/27Al ratio [(26Al/27Al)0] of ∼(4–5) × 10−5, consistent with their origin in a gas of approximately solar composition during a brief (<0.3 Ma) epoch at the earliest stage of our solar system. The nature of O-isotope heterogeneity in CAIs (Δ17O range from ∼−24 up to ∼+5‰) from weakly metamorphosed chondrites (petrologic type >3.0) remains an open issue. This heterogeneity could have recorded fluctuations of O-isotope composition of nebular gas in the CAI-forming region and/or postcrystallization O-isotope exchange of CAI minerals with aqueous fluids on the chondrite parent asteroids. To obtain insights into possible processes resulting in this heterogeneity, we investigated the mineralogy, rare-earth element abundances, and O- and Mg-isotope compositions of a CAI from the CO3.1 chondrite Dar al Gani 083. This concentrically zoned inclusion has a Zn-hercynite core surrounded by layers of (from core to edge) grossite, spinel, melilite, and Al-diopside. The various phases have heterogeneous Δ17O (from core to edge): −2.2 ± 0.6‰, −0.9 ± 2.1‰, −13.7 ± 2.1‰, −2.6 ± 2.3‰, and −22.6 ± 2.1‰, respectively. Magnesium-isotope compositions of grossite, spinel, melilite, and Al-diopside define an undisturbed internal Al–Mg isochron with (26Al/27Al)0 of (2.60 ± 0.29) × 10−6. We conclude that the variations in Δ17O of spinel and diopside recorded fluctuations in O-isotope composition of nebular gas in the CAI-forming region prior to injection and/or homogenization of 26Al at the canonical level. The 16O depletion of grossite and melilite resulted from O-isotope exchange with asteroidal fluid, which did not disturb Al–Mg isotope systematics of the CAI primary minerals. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Metasomatic alteration of coarse‐grained igneous calcium‐aluminum‐rich inclusions from CK3 carbonaceous chondrites.

Author

Krot, Alexander N., Dunn, Tasha L., Petaev, Michail I., Ma, Chi, Nagashima, Kazuhide, and Zipfel, Jutta

Subjects
CHONDRITES, APATITE, OLIVINE, SODALITE, SPHENE, MINERALOGY, PLAGIOCLASE, MAGNETITE, TRACE elements
Abstract

We report on the primary and secondary mineralogies of three coarse‐grained igneous calcium‐aluminum‐rich inclusions (CAIs) (Compact Type A [CTA], Type B [B], and forsterite‐bearing type B [FoB]) from the Northwest Africa (NWA) 5343 (CK3.7) and NWA 4964 (CK3.8) carbonaceous chondrites, compare them with the mineralogy of igneous CAIs from the Allende (CV3.6) chondrite, and discuss the nature of the alteration processes that affected the CK and CV CAIs. The primary mineralogy and mineral chemistry of the CK3 CAIs studied are similar to those from Allende; however, primary melilite and anorthite are nearly completely absent. Although the secondary minerals identified in CK CAIs (Al‐diopside, andradite, Cl‐apatite, clintonite, forsterite, ferroan olivine, Fe,Ni‐sulfides, grossular, ilmenite, magnetite, plagioclase, spinel, titanite, and wadalite) occur also in the Allende CAIs, there are several important differences: (i) In addition to melilite and anorthite, which are nearly completely replaced by secondary minerals, the alteration of CK CAIs also affected high‐Ti pyroxenes (fassaite and grossmanite) characterized by high Ti3+/Ti4+ ratio and spinel. These pyroxenes are corroded and crosscut by veins of Fe‐ and Ti‐bearing grossular, Fe‐bearing Al,Ti‐diopside, titanite, and ilmenite. Spinel is corroded by Fe‐bearing Al‐diopside and grossular. (ii) The secondary mineral assemblages of grossular + monticellite and grossular + wollastonite, commonly observed in the Allende CAIs, are absent; the Fe‐bearing grossular + Fe‐bearing Al‐diopside ± Fe,Mg‐spinel, Fe‐bearing grossular + Fe,Mg‐olivine ± Fe,Mg‐spinel, and Ca,Na‐plagioclase + Fe‐bearing Al‐diopside + Fe‐bearing grossular assemblages are present instead. These mineral assemblages are often crosscut by veins of Fe‐bearing Al‐diopside, Fe,Mg‐olivine, Fe,Mg‐spinel, and Ca,Na‐plagioclase. The coarse‐grained secondary grossular and Al‐diopside often show multilayered chemical zoning with distinct compositional boundaries between the layers; the abundances of Fe and Ti typically increase toward the grain edges. (iv) Sodium‐rich secondary minerals, nepheline and sodalite, commonly observed in the peripheral portions of the Allende CAIs, are absent; Ca,Na‐plagioclase is present instead. We conclude that coarse‐grained igneous CAIs from CK3.7–3.8 s and Allende experienced an open‐system multistage metasomatic alteration in the presence of an aqueous solution–infiltration metasomatism. This process resulted in localized mobilization of all major rock‐forming elements: Si, Ca, Al, Ti, Mg, Fe, Mn, Na, K, and Cl. The metasomatic alteration of CK CAIs is more advanced and occurred under higher temperature and higher oxygen fugacity than that of the Allende CAIs. [ABSTRACT FROM AUTHOR]

Published
2024
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43. The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu

Author

Bizzarro, Martin, primary, Schiller, Martin, additional, Yokoyama, Tetsuya, additional, Abe, Yoshinari, additional, Aléon, Jérôme, additional, Alexander, Conel M. O’D., additional, Amari, Sachiko, additional, Amelin, Yuri, additional, Bajo, Ken-ichi, additional, Bouvier, Audrey, additional, Carlson, Richard W., additional, Chaussidon, Marc, additional, Choi, Byeon-Gak, additional, Dauphas, Nicolas, additional, Davis, Andrew M., additional, Di Rocco, Tommaso, additional, Fujiya, Wataru, additional, Fukai, Ryota, additional, Gautam, Ikshu, additional, Haba, Makiko K., additional, Hibiya, Yuki, additional, Hidaka, Hiroshi, additional, Homma, Hisashi, additional, Hoppe, Peter, additional, Huss, Gary R., additional, Ichida, Kiyohiro, additional, Iizuka, Tsuyoshi, additional, Ireland, Trevor R., additional, Ishikawa, Akira, additional, Itoh, Shoichi, additional, Kawasaki, Noriyuki, additional, Kita, Noriko T., additional, Kitajima, Kouki, additional, Kleine, Thorsten, additional, Komatani, Shintaro, additional, Krot, Alexander N., additional, Liu, Ming-Chang, additional, Masuda, Yuki, additional, Morita, Mayu, additional, Moynier, Fréderic, additional, Motomura, Kazuko, additional, Nakai, Izumi, additional, Nagashima, Kazuhide, additional, Nesvorný, David, additional, Nguyen, Ann, additional, Nittler, Larry, additional, Onose, Morihiko, additional, Pack, Andreas, additional, Park, Changkun, additional, Piani, Laurette, additional, Qin, Liping, additional, Russell, Sara S., additional, Sakamoto, Naoya, additional, Schönbächler, Maria, additional, Tafla, Lauren, additional, Tang, Haolan, additional, Terada, Kentaro, additional, Terada, Yasuko, additional, Usui, Tomohiro, additional, Wada, Sohei, additional, Wadhwa, Meenakshi, additional, Walker, Richard J., additional, Yamashita, Katsuyuki, additional, Yin, Qing-Zhu, additional, Yoneda, Shigekazu, additional, Young, Edward D., additional, Yui, Hiroharu, additional, Zhang, Ai-Cheng, additional, Nakamura, Tomoki, additional, Naraoka, Hiroshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Sakamoto, Kanako, additional, Yabuta, Hikaru, additional, Abe, Masanao, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Okada, Tatsuaki, additional, Yada, Toru, additional, Yogata, Kasumi, additional, Nakazawa, Satoru, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Tsuda, Yuichi, additional, Watanabe, Sei-ichiro, additional, Yoshikawa, Makoto, additional, Tachibana, Shogo, additional, and Yurimoto, Hisayoshi, additional

Published
2023
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44. Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu

Author

Noguchi, Takaaki, primary, Matsumoto, Toru, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Ishii, Hope A., additional, Bradley, John P., additional, Ohtaki, Kenta K., additional, Dobrică, Elena, additional, Leroux, Hugues, additional, Guillou, Corentin Le, additional, Jacob, Damien, additional, de la Peña, Francisco, additional, Laforet, Sylvain, additional, Mouloud, Bahae‐Eddine, additional, Marinova, Maya, additional, Langenhorst, Falko, additional, Harries, Dennis, additional, Beck, Pierre, additional, Phan, Thi H. V., additional, Rebois, Rolando, additional, Abreu, Neyda M., additional, Gray, Jennifer, additional, Zega, Thomas, additional, Zanetta, Pierre‐M., additional, Thompson, Michelle S., additional, Stroud, Rhonda, additional, Burgess, Kate, additional, Cymes, Brittany A., additional, Bridges, John C., additional, Hicks, Leon, additional, Lee, Martin R., additional, Daly, Luke, additional, Bland, Phil A., additional, Smith, William A., additional, McFadzean, Sam, additional, Martin, Pierre‐Etienne, additional, Bagot, Paul A. J., additional, Fougerouse, Dennis, additional, Saxey, David W., additional, Reddy, Steven, additional, Rickard, William D. A., additional, Zolensky, Michael E., additional, Frank, David R., additional, Martinez, James, additional, Tsuchiyama, Akira, additional, Yasutake, Masahiro, additional, Matsuno, Junya, additional, Okumura, Shota, additional, Mitsukawa, Itaru, additional, Uesugi, Kentaro, additional, Uesugi, Masayuki, additional, Takeuchi, Akihisa, additional, Sun, Mingqi, additional, Enju, Satomi, additional, Takigawa, Aki, additional, Michikami, Tatsuhiro, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Nakauchi, Yusuke, additional, Abe, Masanao, additional, Nakazawa, Satoru, additional, Okada, Tatsuaki, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Yoshikawa, Makoto, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Usui, Tomohiro, additional, Yada, Toru, additional, Yurimoto, Hisayoshi, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamotoa, Naoya, additional, Hoppe, Peter, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Sei‐ichiro, additional, and Tsuda, Yuichi, additional

Published
2023
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45. Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil

Author

Leroux, Hugues, primary, Le Guillou, Corentin, additional, Marinova, Maya, additional, Laforet, Sylvain, additional, Viennet, Jean‐Christophe, additional, Mouloud, Bahae‐Eddine, additional, Teurtrie, Adrien, additional, de la Peña, Francisco, additional, Jacob, Damien, additional, Hallatt, Daniel, additional, Fernandez, Mario Pelaez, additional, Troadec, David, additional, Noguchi, Takaaki, additional, Matsumoto, Toru, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Ishii, Hope A., additional, Bradley, John P., additional, Ohtaki, Kenta K., additional, Dobrică, Elena, additional, Langenhorst, Falko, additional, Harries, Dennis, additional, Beck, Pierre, additional, Phan, Thi H. V., additional, Rebois, Rolando, additional, Abreu, Neyda M., additional, Gray, Jennifer, additional, Zega, Thomas, additional, Zanetta, Pierre‐M., additional, Thompson, Michelle S., additional, Stroud, Rhonda, additional, Burgess, Kate, additional, Cymes, Brittany A., additional, Bridges, John C., additional, Hicks, Leon, additional, Lee, Martin R., additional, Daly, Luke, additional, Bland, Phil A., additional, Zolensky, Michael E., additional, Frank, David R., additional, Martinez, James, additional, Tsuchiyama, Akira, additional, Yasutake, Masahiro, additional, Matsuno, Junya, additional, Okumura, Shota, additional, Mitsukawa, Itaru, additional, Uesugi, Kentaro, additional, Uesugi, Masayuki, additional, Takeuchi, Akihisa, additional, Sun, Mingqi, additional, Enju, Satomi, additional, Takigawa, Aki, additional, Michikami, Tatsuhiro, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Nakauchi, Yusuke, additional, Abe, Masanao, additional, Nakazawa, Satoru, additional, Okada, Tatsuaki, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Yoshikawa, Makoto, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Usui, Tomohiro, additional, Yada, Toru, additional, Yurimoto, Hisayoshi, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamotoa, Naoya, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Sei‐Ichiro, additional, and Tsuda, Yuichi, additional

Published
2023
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50. Ion Microprobe

Author

Nagashima, Kazuhide, White, William M., editor, Casey, William H., Associate Editor, Marty, Bernhard, Associate Editor, and Yurimoto, Hisayoshi, Associate Editor

Published
2018
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