A comprehensive study of apatite grains in Ryugu rock fragments
- Author
- B. J. Tkalcec, Pieter Tack (UGent) , Ella De Pauw, Benjamin Bazi (UGent) , Bart Vekemans (UGent) , M. Lindner, Laszlo Vincze (UGent) , M. Di Michiel, J. Garrevoet, G. Falkenberg, T. Nakamura, T. Morita, K. Amano, D. Nakashima, F. Langenhorst, K. Pollok, H. Yurimoto, T. Noguchi, R. Okazaki, H. Yabuta, H. Naraoka, K. Sakamoto, S. Tachibana, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S. Watanabe, Y. Tsuda and F. E. Brenker
- Organization
- Project
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- Development and optimization of X-ray based analytical techniques towards the analysis of rare extraterrestrial materials.
- Development of 3D elemental, structural and isotopic microanalysis techniques for the study of unique meteoritic materials
- Development of X-ray based 2D/3D micro/nano-analysis protocols in preparation for the Hayabusa 2 return sample analysis
- Development and optimization of X-ray based analytical techniques towards the analysis of rare extraterrestrial materials.
- Abstract
- Apatite is present as an accessory phase in many meteorites and is often formed as a secondary product of aqueous alteration. Its propensity to incorporate rare earth elements (REE) results in apatite usually being the main REE-bearing phase in hydrously altered meteorites. Asteroid Ryugu is thought to have experienced pervasive aqueous alteration and material collected from the surface of Ryugu is expected to provide insight into asteroidal aqueous alteration processes without influence by terrestrial weathering. Morphologies and mineral associations of apatite grains from five rock fragments collected from the asteroid Ryugu by the Hayabusa2 spacecraft were examined and their REE concentrations were measured by synchrotron X-ray fluorescence (SXRF) spectroscopy. The main minerals associated with apatite are dolomite, magnetite, and pyrrhotite. Grain boundary corrosion of the interfaces between apatite assemblages and the surrounding matrix suggest that paragenetic formation on the asteroid was followed by a later episode of hydrous alteration. Light REE (LREE) concentration levels recorded at 20-150 times those of bulk CI levels together with a steady increase from LREE toward enrichment of medium REE (MREE, up to Er) at 50-400 times bulk CI levels may suggest postgenetic removal of LREE from Ryugu apatite grains by late-stage circulation of a hydrothermal fluid.
- Keywords
- FLUID-INDUCED NUCLEATION, ASTEROID 162173 RYUGU, DISSOLUTION-REPRECIPITATION, (Y+REE)-PHOSPHATE MINERALS, ELEMENTS, CHONDRITES, ABUNDANCES, CLUES
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01J5MVW668XNMMWYJD3DRJWN6M
- MLA
- Tkalcec, B. J., et al. “A Comprehensive Study of Apatite Grains in Ryugu Rock Fragments.” METEORITICS & PLANETARY SCIENCE, vol. 59, no. 8, 2024, pp. 2149–65, doi:10.1111/maps.14177.
- APA
- Tkalcec, B. J., Tack, P., De Pauw, E., Bazi, B., Vekemans, B., Lindner, M., … Brenker, F. E. (2024). A comprehensive study of apatite grains in Ryugu rock fragments. METEORITICS & PLANETARY SCIENCE, 59(8), 2149–2165. https://doi.org/10.1111/maps.14177
- Chicago author-date
- Tkalcec, B. J., Pieter Tack, Ella De Pauw, Benjamin Bazi, Bart Vekemans, M. Lindner, Laszlo Vincze, et al. 2024. “A Comprehensive Study of Apatite Grains in Ryugu Rock Fragments.” METEORITICS & PLANETARY SCIENCE 59 (8): 2149–65. https://doi.org/10.1111/maps.14177.
- Chicago author-date (all authors)
- Tkalcec, B. J., Pieter Tack, Ella De Pauw, Benjamin Bazi, Bart Vekemans, M. Lindner, Laszlo Vincze, M. Di Michiel, J. Garrevoet, G. Falkenberg, T. Nakamura, T. Morita, K. Amano, D. Nakashima, F. Langenhorst, K. Pollok, H. Yurimoto, T. Noguchi, R. Okazaki, H. Yabuta, H. Naraoka, K. Sakamoto, S. Tachibana, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S. Watanabe, Y. Tsuda, and F. E. Brenker. 2024. “A Comprehensive Study of Apatite Grains in Ryugu Rock Fragments.” METEORITICS & PLANETARY SCIENCE 59 (8): 2149–2165. doi:10.1111/maps.14177.
- Vancouver
- 1.Tkalcec BJ, Tack P, De Pauw E, Bazi B, Vekemans B, Lindner M, et al. A comprehensive study of apatite grains in Ryugu rock fragments. METEORITICS & PLANETARY SCIENCE. 2024;59(8):2149–65.
- IEEE
- [1]B. J. Tkalcec et al., “A comprehensive study of apatite grains in Ryugu rock fragments,” METEORITICS & PLANETARY SCIENCE, vol. 59, no. 8, pp. 2149–2165, 2024.
@article{01J5MVW668XNMMWYJD3DRJWN6M,
abstract = {{Apatite is present as an accessory phase in many meteorites and is often formed as a secondary product of aqueous alteration. Its propensity to incorporate rare earth elements (REE) results in apatite usually being the main REE-bearing phase in hydrously altered meteorites. Asteroid Ryugu is thought to have experienced pervasive aqueous alteration and material collected from the surface of Ryugu is expected to provide insight into asteroidal aqueous alteration processes without influence by terrestrial weathering. Morphologies and mineral associations of apatite grains from five rock fragments collected from the asteroid Ryugu by the Hayabusa2 spacecraft were examined and their REE concentrations were measured by synchrotron X-ray fluorescence (SXRF) spectroscopy. The main minerals associated with apatite are dolomite, magnetite, and pyrrhotite. Grain boundary corrosion of the interfaces between apatite assemblages and the surrounding matrix suggest that paragenetic formation on the asteroid was followed by a later episode of hydrous alteration. Light REE (LREE) concentration levels recorded at 20-150 times those of bulk CI levels together with a steady increase from LREE toward enrichment of medium REE (MREE, up to Er) at 50-400 times bulk CI levels may suggest postgenetic removal of LREE from Ryugu apatite grains by late-stage circulation of a hydrothermal fluid.}},
author = {{Tkalcec, B. J. and Tack, Pieter and De Pauw, Ella and Bazi, Benjamin and Vekemans, Bart and Lindner, M. and Vincze, Laszlo and Di Michiel, M. and Garrevoet, J. and Falkenberg, G. and Nakamura, T. and Morita, T. and Amano, K. and Nakashima, D. and Langenhorst, F. and Pollok, K. and Yurimoto, H. and Noguchi, T. and Okazaki, R. and Yabuta, H. and Naraoka, H. and Sakamoto, K. and Tachibana, S. and Yada, T. and Nishimura, M. and Nakato, A. and Miyazaki, A. and Yogata, K. and Abe, M. and Okada, T. and Usui, T. and Yoshikawa, M. and Saiki, T. and Tanaka, S. and Terui, F. and Nakazawa, S. and Watanabe, S. and Tsuda, Y. and Brenker, F. E.}},
issn = {{1086-9379}},
journal = {{METEORITICS & PLANETARY SCIENCE}},
keywords = {{FLUID-INDUCED NUCLEATION,ASTEROID 162173 RYUGU,DISSOLUTION-REPRECIPITATION,(Y+REE)-PHOSPHATE MINERALS,ELEMENTS,CHONDRITES,ABUNDANCES,CLUES}},
language = {{eng}},
number = {{8}},
pages = {{2149--2165}},
title = {{A comprehensive study of apatite grains in Ryugu rock fragments}},
url = {{http://doi.org/10.1111/maps.14177}},
volume = {{59}},
year = {{2024}},
}
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