Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission
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Published:2022-09-28
Issue:1
Volume:74
Page:
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ISSN:1880-5981
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Container-title:Earth, Planets and Space
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language:en
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Short-container-title:Earth Planets Space
Author:
Tack PieterORCID, De Pauw Ella, Tkalcec Beverley, Lindner Miles, Bazi Benjamin, Vekemans Bart, Brenker Frank, Di Michiel Marco, Uesugi Masayuki, Yurimoto Hisayoshi, Nakamura Tomoki, Amano Kana, Matsumoto Megumi, Fujioka Yuri, Enokido Yuma, Nakashima Daisuke, 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 Tomohiro, Yoshikawa Makoto, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Nakazawa Satoru, Watanabe Sei-Ichiro, Tsuda Yuichi, Vincze Laszlo
Abstract
AbstractMillimetre-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
Funder
Bijzonder Onderzoeksfonds UGent Fonds Wetenschappelijk Onderzoek Deutsche Forschungsgemeinschaft Dr. Rolf M. Schwiete Stiftung
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Geology
Reference32 articles.
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