  The PTAL (Planetary Terrestrial Analogues Library) project aims at building
and exploiting a database involving several analytical techniques, to help
characterizing the mineralogical evolution of terrestrial bodies, starting with
Mars. Around 100 natural Earth rock samples have been collected from selected
locations to gather a variety of analogues for Martian geology, from volcanic
to sedimentary origin with different levels of alteration. All samples are to
be characterized within the PTAL project with different mineralogical and
elemental analysis techniques, including techniques brought on actual and
future instruments at the surface of Mars (Near InfraRed spectroscopy, Raman
spectroscopy and Laser Induced Breakdown Spectroscopy). This paper presents the
NIR measurements and interpretations acquired with the ExoMars MicrOmega spare
instrument. MicrOmega is a NIR hyperspectral microscope, mounted in the
analytical laboratory of the ExoMars rover Rosalind Franklin. All PTAL samples
have been observed at least once with MicrOmega using a dedicated setup. For
all PTAL samples data description and interpretation are presented. For some
chosen examples, RGB images and spectra are presented a well. A comparison with
characterizations by NIR and Raman spectrometry is discussed for some of the
samples. In particular, the spectral imaging capacity of MicrOmega allows
detections of mineral components and potential organic molecules that were not
possible with other one-spot techniques. Additionally, it enables to estimate
heterogeneities in the spatial distribution of various mineral species. The
MicrOmega/PTAL data shall support the future observations and analyses
performed by MicrOmega/Rosalind Franklin instrument.
