Combined SXRF and SXRD study of Ca-rich phases from NASAs OSIRIS-REx sample return mission from asteroid Bennu
收藏ESRF Portal2028-01-01 更新2026-04-23 收录
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https://doi.esrf.fr/10.15151/ESRF-ES-2136307722
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资源简介：
First analyses of the pristine asteroid material collected from the surface of the dark, carbonaceous asteroid 101955 Bennu by NASA’s OSIRIS-REx spacecraft have reported widespread abundance of hydrated minerals and organic material [1]. Up-to-now we mainly applied high-energy (90 keV) synchrotron X-ray fluorescence (SXRF) spectroscopy to investigate the concentration levels of rare-earth elements (REEs) in Ca-phosphates and carbonates, both products of aqueous alteration. Our results [2, 3] indicate higher REE levels in Bennu material relative to material collected from the surface of the similarly dark, carbonaceous asteroid Ryugu [4, 5]. Unambiguous identification of the analysed REE-bearing mineral phases (inferred to be Ca-phosphates and carbonates), planned by this experiment, will be essential for accurate interpretation of our data and their implications for the processes of aqueous alteration on ancient carbonaceous asteroids.
提供机构：
Ghent University, Department of Chemistry, Krijgslaan 281 S3, 9000 Ghent, Belgium; Ghent University, Department of Analytical Chemistry, Krijgslaan 281 - S12, 9000 Ghent, Belgium
创建时间：
2028-01-01
