^1,2Mélissa Martinot,¹Kerri L. Donaldson Hanna,³Benjamin T. Greenhagen,¹Luis Santori,³Patrick N. Peplowski,³Joshua T. S. Cahill
The Planetary Science Journal 6, 20 Open Access Link to Article [DOI 10.3847/PSJ/ad94f0]
¹Department of Physics, University of Central Florida, 4111 Libra Drive, Orlando, FL 32816, USA
²CRPG, CNRS/Université de Lorraine, Vandœuvre-lès-Nancy, France
³The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

¹Peter Wurz,¹Noah Jäggi,¹André Galli,¹Audrey Vorburger,²Deborah Domingue,³Paul S. Szabo,⁴Johannes Benkhoff,⁵Océane Barraud,⁶Daniel Wolf Savin
The Planetary Science Journal 6, 24 Open Access Link to Article [DOI 10.3847/PSJ/ad95fa]
¹Space Science and Planetology, Physics Institute, University of Bern, Bern, Switzerland
²Planetary Science Institute, Tucson, AZ, USA
³Space Sciences Laboratory, University of California, Berkeley, CA, USA
⁴ESA/ESTEC, Noordwijk, The Netherlands
⁵German Aerospace Center (DLR)—Institute of Planetary Research, 12489 Berlin, Germany
⁶Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

^1,2Jean Charlier,¹Alice Aléon-Toppani,¹Rosario Brunetto,²Jérôme Aléon,³Ferenc Borondics
Meteoritics & Planetary Science (in Press) Open Access Link to Article [https://doi.org/10.1111/maps.14314]
¹Institut d’Astrophysique Spatiale, CNRS, Université Paris-Saclay, Orsay, France
²Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d’Histoire Naturelle, CNRS UMR 7590, IRD, Paris, France
³SOLEIL Synchrotron, L’Orme des Merisiers, RD 128, Saint Aubin, France
Published by arrangement with John Wiley & Sons

Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample-return missions, a non-destructive and non-invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed. Here, we performed mid-infrared (MIR) fine-scale hyperspectral imaging over large fields of view to detect RIs in CM and CO chondrites. A database of MIR spectra of typical RIs minerals was built (1) to support future remote sensing observations in astronomical environments and (2) to develop a detection method based on machine-learning algorithms and spectral distance between sample and reference minerals. With this method, up to 96.5% of the RI content is detected in a meteorite section. Further comparison between scanning electron microscopy and spot analysis acquired in reflectance in the full MIR range shows that RIs can be classified following their mineralogy based on infrared (IR) properties. Finally, we show that the relative OH content of several RIs in CM chondrites determined from IR spectroscopy can be used to infer the extent of modification caused by aqueous alteration on the asteroidal parent body.