Abstract
Abstract. Juventae Chasma is a long depression associated with Valles Marineris and this study discusses the spectral observation made after analysing the Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) Full Resolution targeted (FRT) Images in the wavelength region of 1000–2600 nm. Observations reveal the presence of hydrous sulphates, pyroxenes (mafic minerals) and silica rich minerals, more likely opaline silica or glass. Hydrous mineral identified shows the absorption bands, which are more consistent with gypsum. Absorption bands at 2300–2350 nm, and 2500–2550 nm, which are characteristics of carbonates, have been also identified in the region. Presence of this mineral assemblage, confirmed by the observed spectral signatures ranging from volcanic to sedimentary origin, implies a relatively geologically active area, and a significant region in terms of aqueous activity.
Highlights
Juventae Chasma is a box canyon and located north of Valles Marineris
Deposits of Juventae Chasma has been studied by using Mars Global Surveyor (MGS), Mars Orbiter Camera (MOC) and Mars Odyssey Thermal Emission Imaging System (THEMIS) data, Mars Reconnaissance Orbiter (MRO) Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) (Chapman et al, 2003; Catling et al, 2006; Bishop et al, 2009)
CRISM images from Juventae Chasma (Fig.1) frt00017ae0 and frt00005814, used in this study have been taken from the mound and wall rock regions
Summary
Juventae Chasma is a box canyon and located north of Valles Marineris It is considered as a part of Valles Marineris system, but is separated from the main channel by 500 km. The surface of Juventae Chasma has been marked with the presence of mounds and plateau, towards the outflow of Maja Vallis (Chapman et al, 2003; Catling et al, 2006). Mineralogy of Juventae Chasma has been identified and marked with the presence of gypsum identified in horizontal layers nearly hundred meters in thickness each (Gendrin et al, 2005). This study shows the identification of carbonates in the region, which will add and improve the model for the generation of the specific mineral assemblage
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