Jezero Delta mineralogical diversity revealed by SuperCam infrared spectral modeling
Résumé
Since the end of April 2022, the Perseverance rover has embarked on the Delta Campaign
with the objective to explore the sedimentary delta of Jezero Crater and characterize its stratigraphy
and mineral composition. Among the instruments aboard the Rover, SuperCam [1, 2] plays a key
role in this study thanks to its remote measurement capabilities (spectroscopy and imaging), in particular
the near-infrared reflectance spectroscopy performed by the IRS instrument [3]. This instrument analyzes
light reflected from rocks and soils in the 1.3 – 2.6 μm spectral range and in a field of view of 1.15 mrad,
corresponding to an area of about 3.5 mm at 3 m distance. The IRS is thus sensitive to the spectral signatures
of primary and aqueous alteration minerals, enabling the analysis of the compositional diversity of rocks and thus to the study of their formation conditions. Here we summarize a modeling approach of the IRS data to examine diagnostic absorption features.
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