TY - JOUR
T1 - Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission
AU - Tack, Pieter
AU - De Pauw, Ella
AU - Tkalcec, Beverley
AU - Lindner, Miles
AU - Bazi, Benjamin
AU - Vekemans, Bart
AU - Brenker, Frank
AU - Di Michiel, Marco
AU - Uesugi, Masayuki
AU - Yurimoto, Hisayoshi
AU - Nakamura, Tomoki
AU - Amano, Kana
AU - Matsumoto, Megumi
AU - Fujioka, Yuri
AU - Enokido, Yuma
AU - Nakashima, Daisuke
AU - Noguchi, Takaaki
AU - Okazaki, Ryuji
AU - Yabuta, Hikaru
AU - Naraoka, Hiroshi
AU - Sakamoto, Kanako
AU - Tachibana, Shogo
AU - Yada, Toru
AU - Nishimura, Masahiro
AU - Nakato, Aiko
AU - Miyazaki, Akiko
AU - Yogata, Kasumi
AU - Abe, Masanao
AU - Okada, Tatsuaki
AU - Usui, Tomohiro
AU - Yoshikawa, Makoto
AU - Saiki, Takanao
AU - Tanaka, Satoshi
AU - Terui, Fuyuto
AU - Nakazawa, Satoru
AU - Watanabe, Sei Ichiro
AU - Tsuda, Yuichi
AU - Vincze, Laszlo
N1 - Funding Information:
German Research Foundation DFG grant BR2015/38–1, Dr. Rolf M. Schwiete Stiftung, Ghent University Special Research Fund grants BOF20/PDO/037, BOF17-GOA-015, Research Foundation Flanders grants G0D5221N, 1205322 N.
Funding Information:
These experiments were performed on beamline ID15A at the European Synchrotron Radiation Facility (ESRF), Grenoble, France. We are grateful to the local contacts at the ESRF for providing assistance in using beamline ID15A. In addition, special thanks to J. Wyatt (Aeroconcept) for successfully delivering the non-air-exposed Ryugu rock fragments from Japan to Germany during Japan’s COVID-19 total lockdown. Our gratitude is expressed as well for Kagawi Eiichi, Mizuha Kikuiri and Tomoyo Morita from the department of Earth Science in Tohoku University (Japan) for their work with respect to the sample preparation.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Millimetre-sized primordial rock fragments originating from asteroid Ryugu were investigated using high energy X-ray fluorescence spectroscopy, providing 2D and 3D elemental distribution and quantitative composition information on the microscopic level. Samples were collected in two phases from two sites on asteroid Ryugu and safely returned to Earth by JAXA’s asteroid explorer Hayabusa2, during which time the collected material was stored and maintained free from terrestrial influences, including exposure to Earth’s atmosphere. Several grains of interest were identified and further characterised to obtain quantitative information on the rare earth element (REE) content within said grains, following a reference-based and computed-tomography-assisted fundamental parameters quantification approach. Several orders of magnitude REE enrichments compared to the mean CI chondrite composition were found within grains that could be identified as apatite phase. Small enrichment of LREE was found for dolomite grains and slight enrichment or depletion for the general matrices within the Ryugu rock fragments A0055 and C0076, respectively. Graphical Abstract: [Figure not available: see fulltext.]
AB - Millimetre-sized primordial rock fragments originating from asteroid Ryugu were investigated using high energy X-ray fluorescence spectroscopy, providing 2D and 3D elemental distribution and quantitative composition information on the microscopic level. Samples were collected in two phases from two sites on asteroid Ryugu and safely returned to Earth by JAXA’s asteroid explorer Hayabusa2, during which time the collected material was stored and maintained free from terrestrial influences, including exposure to Earth’s atmosphere. Several grains of interest were identified and further characterised to obtain quantitative information on the rare earth element (REE) content within said grains, following a reference-based and computed-tomography-assisted fundamental parameters quantification approach. Several orders of magnitude REE enrichments compared to the mean CI chondrite composition were found within grains that could be identified as apatite phase. Small enrichment of LREE was found for dolomite grains and slight enrichment or depletion for the general matrices within the Ryugu rock fragments A0055 and C0076, respectively. Graphical Abstract: [Figure not available: see fulltext.]
KW - Fundamental parameter quantification
KW - Hayabusa2
KW - REE
KW - Ryugu
KW - X-ray fluorescence spectroscopy
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U2 - 10.1186/s40623-022-01705-3
DO - 10.1186/s40623-022-01705-3
M3 - Article
AN - SCOPUS:85139236469
SN - 1343-8832
VL - 74
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 1
M1 - 146
ER -