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1. Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples

Author

Matsumoto, Toru, Noguchi, Takaaki, Miyake, Akira, Igami, Yohei, Haruta, Mitsutaka, Seto, Yusuke, Miyahara, Masaaki, Tomioka, Naotaka, Saito, Hikaru, Hata, Satoshi, Harries, Dennis, Takigawa, Aki, Nakauchi, Yusuke, Tachibana, Shogo, Nakamura, Tomoki, Matsumoto, Megumi, Ishii, Hope A., Bradley, John P., Ohtaki, Kenta, Dobrică, Elena, Leroux, Hugues, Le Guillou, Corentin, Jacob, Damien, de la Peña, Francisco, Laforet, Sylvain, Marinova, Maya, Langenhorst, Falko, 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, Michikami, Tatsuhiro, Yurimoto, Hisayoshi, Okazaki, Ryuji, Yabuta, Hikaru, Naraoka, Hiroshi, Sakamoto, Kanako, Yada, Toru, Nishimura, Masahiro, Nakato, Aiko, Miyazaki, Akiko, Yogata, Kasumi, Abe, Masanao, Okada, Tatsuaki, Usui, Tomohiro, Yoshikawa, Makoto, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Nakazawa, Satoru, Watanabe, Sei-ichiro, and Tsuda, Yuichi

Published
2024
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2. 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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3. Nonequilibrium spherulitic magnetite in the Ryugu samples

Author

Dobrică, Elena, Ishii, Hope A., Bradley, John P., Ohtaki, Kenta, Brearley, Adrian J., Noguchi, Takaaki, Matsumoto, Toru, Miyake, Akira, Igami, Yohei, Haruta, Mitsutaka, Saito, Hikaru, Hata, Satoshi, Seto, Yusuke, Miyahara, Masaaki, Tomioka, Naotaka, 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, Yurimoto, Hisayoshi, Okazaki, Ryuji, Yabuta, Hikaru, Naraoka, Hiroshi, Sakamoto, Kanako, Tachibana, Shogo, Yada, Toru, Nishimura, Masahiro, Nakato, Aiko, Miyazaki, Akiko, Yogata, Kasumi, Abe, Masanao, Okada, Tatsuaki, Usui, Tomohiro, Yoshikawa, Makoto, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Nakazawa, Satoru, Watanabe, Sei-ichiro, and Tsuda, Yuichi

Published
2023
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4. Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite

Author

Harries, Dennis, primary, Matsumoto, Toru, additional, Langenhorst, Falko, additional, Noguchi, Takaaki, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Takigawa, Aki, additional, Nakauchi, Yusuke, additional, Tachibana, Shogo, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Ishii, Hope A., additional, Bradley, John P., additional, Ohtaki, Kenta, additional, Dobrică, Elena, additional, Leroux, Hugues, additional, Le Guillou, Corentin, additional, Jacob, Damien, additional, de la Peña, Francisco, additional, Laforet, Sylvain, additional, Mouloud, Bahae‐eddine, additional, Marinova, Maya, additional, Beck, Pierre, additional, Phan, Van T. H., 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, Michikami, Tatsuhiro, additional, Yurimoto, Hisayoshi, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Yada, Toru, additional, Nishimura, Masahiro, additional, Nakato, Aiko, additional, Miyazaki, Akiko, additional, Yogata, Kasumi, additional, Abe, Masanao, additional, Okada, Tatsuaki, additional, Usui, Tomohiro, additional, Yoshikawa, Makoto, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Watanabe, Sei‐ichiro, additional, and Tsuda, Yuichi, additional

Published
2024
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5. Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale.

Author

Stroud, Rhonda M., Barosch, Jens, Bonal, Lydie, Burgess, Katherine, Cody, George D., De Gregorio, Bradley T., Daly, Luke, Dartois, Emmanuel, Dobrică, Elena, Duprat, Jean, Engrand, Cecile, Harries, Dennis, Hashiguchi, Minako, Ishii, Hope, Kebukawa, Yoko, Kilcoyne, A. David, Langenhorst, Falko, Lee, Martin R., Nittler, Larry R., and Quirico, Eric

Subjects
TRANSMISSION electron microscopy, KETONES, ORGANIC compounds, CARBOXYL group, ELECTRON microscopy
Abstract

Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that have experienced low‐temperature aqueous alteration. Both nanoglobules and diffuse organic matter are abundant. Non‐globular organic particles are also present, and including some that contain nanodiamond clusters. Diffuse organic matter is finely distributed in and around phyllosilicates, forms coatings on other minerals, and is also preserved in vesicles in secondary minerals such as carbonate and pyrrhotite. The average elemental compositions determined by energy‐dispersive spectroscopy of extracted, demineralized insoluble organic matter samples A0107 and C0106 are C100N3O9S1 and C100N3O7S1, respectively, with the difference in O/C slightly outside the difference in the standard error of the mean. The functional chemistry of the nanoglobules varies from mostly aromatic C=C to mixtures of aromatic C=C, ketone C=O, aliphatic (CHn), and carboxyl (COOH) groups. Diffuse organic matter associated with phyllosilicates has variable aromatic C, ketone and carboxyl groups, and some localized aliphatics, but is dominated by molecular carbonate (CO3) absorption, comparable to prior observations of clay‐bound organic matter in CI meteorites. [ABSTRACT FROM AUTHOR]

Published
2024
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6. 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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7. 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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9. The old, unique C1 chondrite Flensburg – Insight into the first processes of aqueous alteration, brecciation, and the diversity of water-bearing parent bodies and lithologies

Author

Bischoff, Addi, Alexander, Conel M. O'D., Barrat, Jean-Alix, Burkhardt, Christoph, Busemann, Henner, Degering, Detlev, Di Rocco, Tommaso, Fischer, Meike, Fockenberg, Thomas, Foustoukos, Dionysis I., Gattacceca, Jérôme, Godinho, Jose R.A., Harries, Dennis, Heinlein, Dieter, Hellmann, Jan L., Hertkorn, Norbert, Holm, Anja, Jull, A.J. Timothy, Kerraouch, Imene, King, Ashley J., Kleine, Thorsten, Koll, Dominik, Lachner, Johannes, Ludwig, Thomas, Merchel, Silke, Mertens, Cornelia A.K., Morino, Précillia, Neumann, Wladimir, Pack, Andreas, Patzek, Markus, Pavetich, Stefan, Reitze, Maximilian P., Rüfenacht, Miriam, Rugel, Georg, Schmidt, Charlotte, Schmitt-Kopplin, Philippe, Schönbächler, Maria, Trieloff, Mario, Wallner, Anton, Wimmer, Karl, and Wölfer, Elias

Published
2021
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10. 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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11. 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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15. The Braunschweig meteorite − a recent L6 chondrite fall in Germany

Author

Bartoschewitz, Rainer, Appel, Peter, Barrat, Jean-Alix, Bischoff, Addi, Caffee, Marc W., Franchi, Ian A., Gabelica, Zelimir, Greenwood, Richard C., Harir, Mourad, Harries, Dennis, Hochleitner, Rupert, Hopp, Jens, Laubenstein, Matthias, Mader, Barbara, Marques, Rosa, Morlok, Andreas, Nolze, Gert, Prudêncio, Maria Isabel, Rochette, Pierre, Ruf, Alexander, Schmitt-Kopplin, Philippe, Seemann, Erhard, Szurgot, Marian, Tagle, Roald, Wach, Radosław A., Welten, Kees C., Weyrauch, Mona, and Wimmer, Karl

Published
2017
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17. Upper limits of water contents in olivine and orthopyroxene of equilibrated chondrites and several achondrites

Author

Harries, Dennis, Zhao, Xuchao, and Franchi, Ian

Subjects
Geophysics, Space and Planetary Science, orthopyroxene, water contents, achondrites, olivine, ddc:549, chondrites
Abstract

Hydroxyl defects in nominally anhydrous minerals (NAMs) were potential carriers of water in the early Solar System and might have contributed to the accretion of terrestrial water. To better understand this, we have conducted a nanoscale secondary ion mass spectrometry survey of water contents in olivine and orthopyroxene from a set of equilibrated ordinary chondrites of the L and LL groups (Baszkówka, Bensour, Kheneg Ljouâd, and Tuxtuac) and several ultramafic achondrites (Zakłodzie, Dhofar 125, Northwest Africa [NWA] 4969, NWA 6693, and NWA 7317). For calibration, we used terrestrial olivine and orthopyroxene with H2O contents determined by Fourier transform infrared. Our 99.7% (~3SD) detection limits are 3.6–5.4 ppmw H2O for olivine and 7.7–10.9 ppmw H2O for orthopyroxene. None of the meteoritic samples studied consistently shows water contents above the detection limits. A few exceptions slightly above the detection limits are suspected of terrestrial contamination by ferric oxyhydroxides. If the meteorite samples investigated accreted in the presence of small amounts of water ice, the upper limits of water contents provided by our survey suggest that the retention of hydrogen during thermal metamorphism and differentiation was ineffective. We suggest that loss occurred through combinations of low internal pressures, high permeability along grain boundaries, and speciation of hydrogen into reduced compounds such as H2 and methane, which are less soluble in NAMs than in water., Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659, Europlanet 2020 RI

Published
2023

18. Re-distribution of volatiles on the airless surface of the C-type carbonaceous asteroid Ryugu.

Author

Matsumoto, Toru, primary, Noguchi, Takaaki, additional, Miyake, Akira, additional, Igami, Yohei, additional, Haruta, Mitsutaka, additional, Seto, Yusuke, additional, Miyahara, Masaaki, additional, Tomioka, Naotaka, additional, Saito, Hikaru, additional, Hata, Satoshi, additional, Harries, Dennis, additional, Takigawa, Aki, additional, Nakauchi, Yuusuke, additional, Tachibana, Shogo, additional, Nakamura, Tomoki, additional, Matsumoto, Megumi, additional, Ishii, Hope, additional, Bradley, John, additional, Ohtaki, Kenta, additional, Dobrică, Elena, additional, Leroux, Hugues, additional, Guillou, Corentin Le, additional, Jacob, Damien, additional, Peña, Francisco de la, additional, Laforet, Sylvain, additional, Marinova, Maya, additional, Langenhorst, Falko, additional, Beck, Pierre, additional, Phan, Thi, additional, Rebois, Rolando, additional, Abreu, Neyda, additional, Gray, Jennifer, additional, Zega, Thomas, additional, Zanetta, Pierre-Marie, additional, Thompson, Michelle, additional, Stroud, Rhonda, additional, Burgess, Katherine, additional, Cymes, Brittany, additional, Bridges, John, additional, Hicks, Leon, additional, Lee, Martin, additional, Daly, Luke, additional, Bland, Phil, additional, Zolensky, Michael, additional, Frank, David, 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, Michikami, Tatsuhiro, additional, Yurimoto, Hisayoshi, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Yada, Toru, additional, Nishimura, Masahiro, additional, Nakato, Aiko, additional, Miyazaki, Akiko, additional, Yogata, Kasumi, additional, Abe, Masanao, additional, Okada, Tatsuaki, additional, Usui, Tomohiro, additional, Yoshikawa, Makoto, additional, Saiki, Takanao, additional, Tanaka, Satoshi, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2023
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20. A dehydrated space-weathered skin cloaking the hydrated interior of 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, Le Guillou, Corentin, additional, Jacob, Damien, additional, de la Peña, Francisco, additional, Laforet, Sylvain, 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, 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, Arakawa, Masahiko, additional, Fujii, Atsushi, additional, Hayakawa, Masahiko, additional, Hirata, Naru, additional, Hirata, Naoyuki, additional, Honda, Rie, additional, Honda, Chikatoshi, additional, Hosoda, Satoshi, additional, Iijima, Yu-ichi, additional, Ikeda, Hitoshi, additional, Ishiguro, Masateru, additional, Ishihara, Yoshiaki, additional, Iwata, Takahiro, additional, Kawahara, Kousuke, additional, Kikuchi, Shota, additional, Kitazato, Kohei, additional, Matsumoto, Koji, additional, Matsuoka, Moe, additional, Mimasu, Yuya, additional, Miura, Akira, additional, Morota, Tomokatsu, additional, Nakazawa, Satoru, additional, Namiki, Noriyuki, additional, Noda, Hirotomo, additional, Noguchi, Rina, additional, Ogawa, Naoko, additional, Ogawa, Kazunori, additional, Okada, Tatsuaki, additional, Okamoto, Chisato, additional, Ono, Go, additional, Ozaki, Masanobu, additional, Saiki, Takanao, additional, Sakatani, Naoya, additional, Sawada, Hirotaka, additional, Senshu, Hiroki, additional, Shimaki, Yuri, additional, Shirai, Kei, additional, Sugita, Seiji, additional, Takei, Yuto, additional, Takeuchi, Hiroshi, additional, Tanaka, Satoshi, additional, Tatsumi, Eri, additional, Terui, Fuyuto, additional, Tsukizaki, Ryudo, additional, Wada, Koji, additional, Yamada, Manabu, additional, Yamada, Tetsuya, additional, Yamamoto, Yukio, additional, Yano, Hajime, additional, Yokota, Yasuhiro, additional, Yoshihara, Keisuke, additional, Yoshikawa, Makoto, additional, Yoshikawa, Kent, additional, Fukai, Ryohta, additional, Furuya, Shizuho, additional, Hatakeda, Kentaro, additional, Hayashi, Tasuku, additional, Hitomi, Yuya, additional, Kumagai, Kazuya, additional, Miyazaki, Akiko, additional, Nakato, Aiko, additional, Nishimura, Masahiro, additional, Soejima, Hiromichi, additional, Suzuki, Ayako I., additional, Usui, Tomohiro, additional, Yada, Toru, additional, Yamamoto, Daiki, additional, Yogata, Kasumi, additional, Yoshitake, Miwa, additional, Connolly, Harold C., additional, Lauretta, Dante S., additional, Yurimoto, Hisayoshi, additional, Nagashima, Kazuhide, additional, Kawasaki, Noriyuki, additional, Sakamoto, 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
2022
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24. The polymict carbonaceous breccia Aguas Zarcas: A potential analog to samples being returned by the OSIRIS‐REx and Hayabusa2 missions

Author

Kerraouch, Imene, primary, Bischoff, Addi, additional, Zolensky, Michael E., additional, Pack, Andreas, additional, Patzek, Markus, additional, Hanna, Romy D., additional, Fries, Marc D., additional, Harries, Dennis, additional, Kebukawa, Yoko, additional, Le, Loan, additional, Ito, Motoo, additional, and Rahman, Zia, additional

Published
2021
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26. Identification of MYOM2 as a candidate gene in hypertrophic cardiomyopathy and tetralogy of fallot, and its functional evaluation in the Drosophila heart

Author

Auxerre-Plantié, Emilie, Nielsen, Tanja, Grunert, Marcel, Olejniczak, Olga, Perrot, Andreas, Özcelik, Cemil, Harries, Dennis, Matinmehr, Faramarz, Dos Remedios, Cristobal, Mühlfeld, Christian, Kraft, Theresia, Bodmer, Rolf, Vogler, Georg, and Sperling, Silke R.

Subjects
CG14964, Myomesin, Candidate gene, Cardiovascular and Metabolic Diseases, Cardiomyopathy, lcsh:R, lcsh:Pathology, lcsh:Medicine, 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit, lcsh:RB1-214, Congenital heart disease
Abstract

The causal genetic underpinnings of congenital heart diseases, which are often complex and with multigenic background, are still far from understood. Moreover, there are also predominantly monogenic heart defects, such as cardiomyopathies, with known disease genes for the majority of cases. In this study, we identified mutations in myomesin 2 (MYOM2) in patients with Tetralogy of Fallot (TOF), the most common cyanotic heart malformation, as well as in patients with hypertrophic cardiomyopathy (HCM), who do not exhibit any mutations in the known disease genes. MYOM2 is a major component of the myofibrillar M-band of the sarcomere and a hub gene within interactions of sarcomere genes. We show that patient-derived cardiomyocytes exhibit myofibrillar disarray and reduced passive force with increasing sarcomere lengths. Moreover, our comprehensive functional analyses in the Drosophila animal model reveal that the so far uncharacterized fly gene CG14964 may be an ortholog of MYOM2, as well as other myosin binding proteins (henceforth named as Drosophila Myomesin and Myosin Binding protein (dMnM)). Its partial loss-of-function or moderate cardiac knockdown results in cardiac dilation, whereas more severely reduced function causes a constricted phenotype and an increase in sarcomere myosin protein. Moreover, compound heterozygous combinations of CG14964 and the sarcomere gene Mhc (MYH6/7) exhibited synergistic genetic interactions. In summary, our results suggest that MYOM2 not only plays a critical role in maintaining robust heart function but may also be a candidate gene for heart diseases such as HCM and TOF, as it is clearly involved in the development of the heart. SUMMARY STATEMENT: MYOM2 plays a critical role in establishing or maintaining robust heart function and is a candidate gene for heart diseases such as hypertrophic cardiomyopathy and Tetralogy of Fallot.

Published
2020
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29. Identification ofMYOM2as a candidate gene in hypertrophic cardiomyopathy and Tetralogy of Fallot and its functional evaluation in theDrosophilaheart

Author

Auxerre-Plantié, Emilie, primary, Nielsen, Tanja, additional, Grunert, Marcel, additional, Olejniczak, Olga, additional, Perrot, Andreas, additional, Özcelik, Cemil, additional, Harries, Dennis, additional, Matinmehr, Faramarz, additional, Remedios, Cristobal Dos, additional, Mühlfeld, Christian, additional, Kraft, Theresia, additional, Bodmer, Rolf, additional, Vogler, Georg, additional, and Sperling, Silke R., additional

Published
2020
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30. Identification of MYOM2 as a candidate gene in hypertrophic cardiomyopathy and tetralogy of fallot and its functional evaluation in the Drosophila heart

Author

Auxerre-Plantié, Emilie, primary, Nielsen, Tanja, additional, Grunert, Marcel, additional, Olejniczak, Olga, additional, Perrot, Andreas, additional, Özcelik, Cemil, additional, Harries, Dennis, additional, Matinmehr, Faramarz, additional, Dos Remedios, Cristobal, additional, Mühlfeld, Christian, additional, Kraft, Theresia, additional, Bodmer, Rolf, additional, Vogler, Georg, additional, and Sperling, Silke R., additional

Published
2020
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32. The presolar grain inventory of fine-grained chondrule rims in the Mighei-type (CM) chondrites

Author

Leitner, Jan, Metzler, Knut, Vollmer, Christian, Floss, Christine, Haenecour, Pierre, Kodol��nyi, J��nos, Harries, Dennis, and Hoppe, Peter

Abstract

We investigated the inventory of presolar silicate, oxide, and silicon carbide (SiC) grains of fine-grained chondrule rims in six Mighei-type (CM) carbonaceous chondrites (Banten, Jbilet Winselwan, Maribo, Murchison, Murray and Yamato 791198), and the CM-related carbonaceous chondrite Sutter's Mill. Sixteen O-anomalous grains (nine silicates, six oxides) were detected, corresponding to a combined matrix-normalized abundance of ~18 ppm, together with 21 presolar SiC grains (~42 ppm). Twelve of the O-rich grains are enriched in 17O, and could originate from low-mass asymptotic giant branch stars. One grain is enriched in 17O and significantly depleted in 18O, indicative of additional cool bottom processing or hot bottom burning in its stellar parent, and three grains are of likely core-collapse supernova origin showing enhanced 18O/16O ratios relative to the solar system ratio. We find a presolar silicate/oxide ratio of 1.5, significantly lower than the ratios typically observed for chondritic meteorites. This may indicate a higher degree of aqueous alteration in the studied meteorites, or hint at a heterogeneous distribution of presolar silicates and oxides in the solar nebula. Nevertheless, the low O-anomalous grain abundance is consistent with aqueous alteration occurring in the protosolar nebula and/or on the respective parent bodies. Six O-rich presolar grains were studied by Auger Electron Spectroscopy, revealing two Fe-rich silicates, one forsterite-like Mg-rich silicate, two Al-oxides with spinel-like compositions, and one Fe-(Mg-)oxide. Scanning electron and transmission electron microscopic investigation of a relatively large silicate grain (490 nm �� 735 nm) revealed that it was crystalline ��kermanite (Ca2Mg[Si2O7]) or a an ��kermanite-diopside (MgCaSi2O6) intergrowth.

Published
2019
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33. Secondary submicrometer impact cratering on the surface of asteroid 25143 Itokawa

Author

Harries, Dennis, Langenhorst, Falko, Yakame, Shogo, Karouji, Yuzuru, and Uesugi, Masayuki

Subjects
asteroid, 010504 meteorology & atmospheric sciences, Solar flare, Hayabusa, regolith, 01 natural sciences, Space weathering, Regolith, Astrobiology, space weathering, Solar wind, Geophysics, Impact crater, Space and Planetary Science, Geochemistry and Petrology, Asteroid, impact cratering, 0103 physical sciences, Earth and Planetary Sciences (miscellaneous), Particle, 010303 astronomy & astrophysics, exposure age, Geology, 0105 earth and related environmental sciences, Space environment
Abstract

Accepted: 2016-06-18, 資料番号: SA1160149000

Published
2016

37. The presolar grain inventory of fine‐grained chondrule rims in the Mighei‐type (CM) chondrites.

Author

Leitner, Jan, Metzler, Knut, Vollmer, Christian, Floss, Christine, Haenecour, Pierre, Kodolányi, János, Harries, Dennis, and Hoppe, Peter

Subjects
CHONDRULES, AUGER electron spectroscopy, CHONDRITES, GRAIN, SILICON carbide, PLANETESIMALS
Abstract

We investigated the inventory of presolar silicate, oxide, and silicon carbide (SiC) grains of fine‐grained chondrule rims in six Mighei‐type (CM) carbonaceous chondrites (Banten, Jbilet Winselwan, Maribo, Murchison, Murray and Yamato 791198), and the CM‐related carbonaceous chondrite Sutter's Mill. Sixteen O‐anomalous grains (nine silicates, six oxides) were detected, corresponding to a combined matrix‐normalized abundance of ~18 ppm, together with 21 presolar SiC grains (~42 ppm). Twelve of the O‐rich grains are enriched in 17O, and could originate from low‐mass asymptotic giant branch stars. One grain is enriched in 17O and significantly depleted in 18O, indicative of additional cool bottom processing or hot bottom burning in its stellar parent, and three grains are of likely core‐collapse supernova origin showing enhanced 18O/16O ratios relative to the solar system ratio. We find a presolar silicate/oxide ratio of 1.5, significantly lower than the ratios typically observed for chondritic meteorites. This may indicate a higher degree of aqueous alteration in the studied meteorites, or hint at a heterogeneous distribution of presolar silicates and oxides in the solar nebula. Nevertheless, the low O‐anomalous grain abundance is consistent with aqueous alteration occurring in the protosolar nebula and/or on the respective parent bodies. Six O‐rich presolar grains were studied by Auger Electron Spectroscopy, revealing two Fe‐rich silicates, one forsterite‐like Mg‐rich silicate, two Al‐oxides with spinel‐like compositions, and one Fe‐(Mg‐)oxide. Scanning electron and transmission electron microscopic investigation of a relatively large silicate grain (490 nm × 735 nm) revealed that it was crystalline åkermanite (Ca2Mg[Si2O7]) or a an åkermanite‐diopside (MgCaSi2O6) intergrowth. [ABSTRACT FROM AUTHOR]

Published
2020
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38. Iron whiskers on asteroid Itokawa indicate sulfide destruction by space weathering.

Author

Toru Matsumoto, Harries, Dennis, Langenhorst, Falko, Miyake, Akira, and Takaaki Noguchi

Subjects
SPACE environment, INTERSTELLAR gases, IRON sulfides, ASTEROIDS, CARBONACEOUS chondrites (Meteorites), METALLIC whiskers
Abstract

Extraterrestrial iron sulfide is a major mineral reservoir of the cosmochemically and astrobiologically important elements iron and sulfur. Sulfur depletion on asteroids is a longstanding, yet unresolved phenomenon that is of fundamental importance for asteroid evolution and sulfur delivery to the Earth. Understanding the chemistry of such environments requires insight into the behavior of iron sulfides exposed to space. Here we show that troilite (FeS) grains recovered from the regolith of asteroid 25143 Itokawa have lost sulfur during long-term space exposure. We report the wide-spread occurrence of metallic iron whiskers as a decomposition product formed through irradiation of the sulfide by energetic ions of the solar wind. Whisker growth by ion irradiation is a novel and unexpected aspect of space weathering. It implies that sulfur loss occurs rapidly and, furthermore, that ion irradiation plays an important role in the redistribution of sulfur between solids and gas of the interstellar medium. [ABSTRACT FROM AUTHOR]

Published
2020
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41. The Braunschweig meteorite - a recent L6 chondrite fall in Germany

Author

Bartoschewitz, Rainer, Appel, Peter, Banat, Jean-Alix, Bischoff, Addi, Caffee, Marc W., Franchi, Ian A., Gabelica, Zelimir, Greenwood, Richard C., Harir, Mourad, Harries, Dennis, Hochleitner, Rupert, Hopp, Jens, Laubenstein, Matthias, Mader, Barbara, Rosa Marques, Morlok, Andreas, Nolze, Gert, Prudencio, Maria Isabel, Rochette, Pierre, Ruf, Alexander, Schmitt-Kopplin, Philippe, Seemann, Erhard, Szurgot, Marian, Tagle, Roald, Wach, Radoslaw A., Welten, Kees C., Weyrauch, Mona, Wimmer, Karl, Braunschweig Meteorite Consortium, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), and Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Radionuclide, Geochemistry, Mineralogy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Radius, 010502 geochemistry & geophysics, 01 natural sciences, Noble gas isotopes, Parent body, Gas retention, Braunschweig Meteorite, Bulk Chemistry, Fall Reconstruction, Ir Spectroscopy, L Chondrite, Noble Gas Isotopes, Organic Matter, Petrology And Mineralogy, Radionuclides, Specific Heat, Geophysics, Allende meteorite, Meteorite, Geochemistry and Petrology, Chondrite, 0103 physical sciences, 010303 astronomy & astrophysics, Geology, 0105 earth and related environmental sciences
Abstract

International audience; On April 23rd 2013 at 2:07 a.m., a 1.3 kg meteorite fell in the Braunschweig suburb Melverode (52 degrees 13' 32.19'' N. 10 degrees 31' 11.60'' E). Its estimated velocity was 250 km/h and it formed an impact pit in the concrete fall site with a diameter of 7 cm and a depth of 3 cm. Radial dust striae are present around the impact pit. As a result of the impact, the meteorite disintegrated into several hundred fragments with masses up to 214g. The meteorite is a typical L6 chondrite, moderately shocked (S4) - but with a remarkably high porosity (up to 20 vol%). The meteorite was ejected from its parent body as an object with a radius of about 10-15 cm (15-50 kg). The U,Th-He gas retention age of similar to 550 Ma overlaps with the main impact event on the L-chondrite parent body similar to 470 Ma ago that is recorded by many shocked L chondrites. The preferred cosmic-ray exposure age derived from production of radionuclides and noble gas isotopes is (6.0 +/- 1.3) Ma. (C) 2016 Elsevier GmbH. All rights reserved.

Published
2016

44. The Stubenberg meteorite—An LL6 chondrite fragmental breccia recovered soon after precise prediction of the strewn field

Author

Bischoff, Addi, primary, Barrat, Jean‐Alix, additional, Bauer, Kerstin, additional, Burkhardt, Christoph, additional, Busemann, Henner, additional, Ebert, Samuel, additional, Gonsior, Michael, additional, Hakenmüller, Janina, additional, Haloda, Jakub, additional, Harries, Dennis, additional, Heinlein, Dieter, additional, Hiesinger, Harald, additional, Hochleitner, Rupert, additional, Hoffmann, Viktor, additional, Kaliwoda, Melanie, additional, Laubenstein, Matthias, additional, Maden, Colin, additional, Meier, Matthias M. M., additional, Morlok, Andreas, additional, Pack, Andreas, additional, Ruf, Alexander, additional, Schmitt‐Kopplin, Philippe, additional, Schönbächler, Maria, additional, Steele, Robert C. J., additional, Spurný, Pavel, additional, and Wimmer, Karl, additional

Published
2017
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47. Northwest Africa 11024—A heated and dehydrated unique carbonaceous (CM) chondrite.

Author

Ebert, Samuel, Bischoff, Addi, Harries, Dennis, Lentfort, Sarah, Barrat, Jean‐Alix, Pack, Andreas, Gattacceca, Jérôme, Visser, Robbin, Schmid‐Beurmann, Peter, and Kimpel, Stephan

Subjects
PARAGENESIS, CHONDRITES, TEMPERATURE, CALCITE, DENSITY
Abstract

Based on the high abundance of fine‐grained material and its dark appearance, NWA 11024 was recognized as a CM chondrite, which is also confirmed by oxygen isotope measurements. But contrary to known CM chondrites, the typical phases indicating aqueous alteration (e.g., phyllosilicates, carbonates) are missing. Using multiple analytical techniques, this study reveals the differences and similarities to known CM chondrites and will discuss the possibility that NWA 11024 is the first type 3 CM chondrite. During the investigation, two texturally apparent tochilinite–cronstedtite intergrowths were identified within two thin sections. However, the former phyllosilicates were recrystallized to Fe‐rich olivine during a heating event without changing the textural appearance. A peak temperature of 400–600 °C is estimated, which is not high enough to destroy or recrystallize calcite grains. Thus, calcites were never constituents of the mineral paragenesis. Another remarkable feature of NWA 11024 is the occurrence of unknown clot‐like inclusions (UCLIs) within fine‐grained rims, which are unique in this clarity. Their density and S concentration are significantly higher than of the surrounding fine‐grained rim and UCLIs can be seen as primary objects that were not formed by secondary alteration processes inside the rims. Similarities to chondritic and cometary interplanetary dust particles suggest an ice‐rich first‐generation planetesimal for their origin. In the earliest evolution, NWA 11024 experienced the lowest degree of aqueous alteration of all known CM chondrites and subsequently, a heating event dehydrated the sample. We suggest to classify the meteorite NWA 11024 as the first type 3 CM chondrite similar to the classification of CV3 chondrites (like Allende) that could also have lost their matrix phyllosilicates by thermal dehydration. [ABSTRACT FROM AUTHOR]

Published
2019
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49. Fate of MgSiO 3 melts at core–mantle boundary conditions

Author

Petitgirard, Sylvain, primary, Malfait, Wim J., additional, Sinmyo, Ryosuke, additional, Kupenko, Ilya, additional, Hennet, Louis, additional, Harries, Dennis, additional, Dane, Thomas, additional, Burghammer, Manfred, additional, and Rubie, Dave C., additional

Published
2015
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