Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space missionOPEN ACCESS 

· by · in , , ,

Pieter Tack, Ella De Pauw, Beverley Tkalcec, Miles Lindner, Benjamin Bazi, Bart Vekemans, Frank Brenker, Marco Di Michiel, Masayuki Uesugi, Hisayoshi Yurimoto, Tomoki Nakamura, Kana Amano, Megumi Matsumoto, Yuri Fujioka, Yuma Enokido, Daisuke Nakashima, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-Ichiro Watanabe, Yuichi Tsuda & Laszlo Vincze

Earth, Planets and Space, Volume 74, Article number: 146
Published: 28 September 2022

LINK (OPEN ACCESS)
PDF (DOWNLOAD)

“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.”

Related posts (automatically generated):

  1. Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution
  2. Site selection for the Hayabusa2 artificial cratering and subsurface material sampling on Ryugu
  3. Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on RyuguOPEN ACCESS 
  4. Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescenceOPEN ACCESS 
  5. Hayabusa2 Operation for MASCOT Delivery to Ryugu Surface
  6. First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from RyuguOPEN ACCESS 
  7. Derivation of 1.064 μm normal albedos on the C-type asteroid Ryugu from laser pulse intensity measurement of the Hayabusa2 LIDAROPEN ACCESS 
  8. Constraining surface properties of asteroid (162173) Ryugu from numerical simulations of Hayabusa2 mission impact experimentOPEN ACCESS 
  9. MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2OPEN ACCESS 
  10. Ground-based Characterization of Hayabusa2 Mission Target Asteroid 162173 Ryugu: Constraining Mineralogical Composition in Preparation for Spacecraft OperationsOPEN ACCESS 
Tags: , , , , ,