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Your search keyword '"Toppani, Alice"' showing total 9 results
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9 results on '"Toppani, Alice"'

1. Three-dimensional textures of Ryugu samples and their implications for the evolution of aqueous alteration in the Ryugu parent body

Author

Tsuchiyama, Akira, Matsumoto, Megumi, Matsuno, Junya, Yasutake, Masahiro, Nakamura, Tomoki, Noguchi, Takaaki, Miyake, Akira, Uesugi, Kentaro, Takeuchi, Akihisa, Okumura, Shota, Fujioka, Yuri, Sun, Mingqi, Takigawa, Aki, Matsumoto, Toru, Enju, Satomi, Mitsukawa, Itaru, Enokido, Yuma, Kawamoto, Tatsuhiko, Mikouchi, Takeshi, Michikami, Tatsuhiro, Morita, Tomoyo, Kikuiri, Mizuha, Amano, Kana, Kagawa, Eiichi, Rubino, Stefano, Dionnet, Zelia, Aléon-Toppani, Alice, Brunetto, Rosario, Zolensky, Michael E., Nakano, Tsukasa, Nakano, Naoto, 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, Nakazawa, Satoru, Terui, Fuyuto, Tachibana, Shogo, Watanabe, Sei-ichiro, and Tsuda, Yuichi

Published
2024
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3. Correlated IR-SEM-TEM studies of three different grains from Ryugu: From the initial material to post-accretional processes

Author

Aléon-Toppani, Alice, Brunetto, Rosario, Dionnet, Zélia, Rubino, Stefano, Baklouti, Donia, Brisset, François, Vallet, Maxime, Heripre, Eva, Nakamura, Tomoki, Lantz, Cateline, Djouadi, Zahia, Borondics, Ferenc, Sandt, Christophe, Troadec, David, Mivumbi, Obadias, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, Yurimoto, Hisayoshi, Noguchi, Takaaki, 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, Tomohira, Yoshikawa, Makoto, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Nakazawa, Satoru, Watanabe, Sei-ichiro, and Tsuda, Yuichi

Published
2024
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4. Small grains from Ryugu: handling and analysis pipeline for infrared synchrotron microspectroscopy

Author

Rubino, Stefano, Dionnet, Zélia, Aléon-Toppani, Alice, Brunetto, Rosario, Nakamura, Tomoki, Baklouti, Donia, Djouadi, Zahia, Lantz, Cateline, Mivumbi, Obadias, Borondics, Ferenc, Lefrançois, Stephane, Sandt, Christophe, Capitani, Francesco, Héripré, Eva, Troadec, David, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, Yurimoto, Hisayoshi, Noguchi, Takaaki, Okazaki, Ryuji, Yabuta, Hikaru, Naraoka, Hiroshi, Sakamoto, Kanako, Tachibana, Shogo, Watanabe, Seiichiro, and Tsuda, Yuichi

Published
2023
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5. Three‐dimensional multiscale assembly of phyllosilicates, organics, and carbonates in small Ryugu fragments.

Author

Dionnet, Zelia, Rubino, Stefano, Aléon‐Toppani, Alice, Brunetto, Rosario, Tsuchiyama, Akira, Lantz, Cateline, Djouadi, Zahia, Baklouti, Donia, Nakamura, Tomoki, Borondics, Ferenc, Sandt, Christophe, Heripre, Eva, Troadec, David, Mivumbi, Obadias, Aléon, Jérome, Ternier, Theo, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, and Yurimoto, Hisayoshi

Subjects
ORGANIC compounds, PHYLLOSILICATES, TOMOGRAPHY, CARBONATES, SILICATES
Abstract

We report μm‐scale nondestructive infrared (IR) hyperspectral results (IR computed tomography, IR‐CT) in 3‐D and IR surface imaging, IR‐S) in 2‐D, at SOLEIL) combined with X‐ray nano‐computed tomography analyses (at SPring‐8) performed on eight small Ryugu fragments extracted from mm‐sized grains coming both from touchdown first and second sites. We describe the multiscale assembly of phyllosilicates, carbonates, sulfides, oxides, and organics. Two types of silicates, as well as diverse kinds of organic matter, were detected inside Ryugu material. Their spatial correlations are described to discuss the role of the mineralogical microenvironments in the formation/evolution of organic matter. In particular, we have shown that there is a redistribution of the organic matter diffuse component during aqueous alteration on the parent body, with a preferential circulation among fine‐grained phyllosilicates. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Small grains from Ryugu: handling and analysis pipeline for Infrared Synchrotron Microspectroscopy

Author

Rubino, Stefano, primary, Dionnet, Zélia, additional, Aléon-Toppani, Alice, additional, Brunetto, Rosario, additional, Nakamura, Tomoki, additional, Baklouti, Donia, additional, Djouadi, Zahia, additional, Lantz, Cateline, additional, Mivumbi, Obadias, additional, Borondics, Ferenc, additional, Lefrançois, Stephane, additional, Sandt, Christophe, additional, Capitani, Francesco, additional, Héripré, Eva, additional, Troadec, David, additional, Matsumoto, Megumi, additional, Amano, Kana, additional, Morita, Tomoyo, additional, Yurimoto, Hisayoshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Seiichiro, additional, and Tsuda, Yuichi, additional

Published
2022
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8. Multiscale correlated analysis of the Aguas Zarcas CM chondrite

Author

Dionnet, Zélia, primary, Aléon‐Toppani, Alice, additional, Brunetto, Rosario, additional, Rubino, Stefano, additional, Suttle, Martin D., additional, Lantz, Cateline, additional, Avdellidou, Chrysa, additional, Baklouti, Donia, additional, Borondics, Ferenc, additional, Djouadi, Zahia, additional, Greco, Francesco, additional, Héripré, Eva, additional, Nakamura, Tomoki, additional, Rotundi, Alessandra, additional, and Scheel, Mario, additional

Published
2022
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9. Methylene‐to‐methyl ratio variability in Ryugu samples: Clues to a heterogeneous aqueous alteration.

Author

Dionnet, Zélia, Djouadi, Zahia, Delaye, Lukas, Caron, Lucas, Brunetto, Rosario, Aléon‐Toppani, Alice, Lantz, Cateline, Rubino, Stefano, Baklouti, Donia, Nakamura, Tomoki, Borondics, Ferenc, Sandt, Christophe, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, Yurimoto, Hisayoshi, Noguchi, Takaaki, Okazaki, Ryuji, Yabuta, Hikaru, and Naraoka, Hiroshi

Subjects
*ALIPHATIC compounds, *FOURIER transforms, *ORGANIC compounds, *HETEROGENEITY, *STRUCTURAL components, *DIAMOND anvil cell
Abstract

Understanding the processes of aqueous alteration within primitive bodies is crucial for unraveling the complex history of early planetesimals. To better identify the signs of this process and its consequences, we have studied the heterogeneity at a micrometric scale of the structure of the aliphatic organic compounds and its relationship to its mineralogical environment. Here, we report an analysis performed on two micrometric grains of Ryugu (C0002‐FC027 and C0002‐FC028). The samples were crushed in a diamond compression cell and analyzed using high‐spatial resolution Fourier Transform InfraRed (FT‐IR) hyperspectral imaging measurements conducted in transmission mode. We showed here the spatial distributions of the main components and the structural heterogeneity of the aliphatic organic matter highlighting a micrometer‐scale variability in the methylene‐to‐methyl ratio. Moreover, we connected this heterogeneity to the one of the phyllosilicate band positions. Our findings indicate that the organic matter within Ryugu's micrometric grains underwent varying degrees of aqueous alteration in distinct microenvironments resulting in an elongation of the length of their aliphatic chains, and/or a reduction in their branching and/or cross‐linking. [ABSTRACT FROM AUTHOR]

Published
2024
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