Revised CRISM spectral parameters and summary products based on the currently detected mineral diversity on Mars

Abstract

The investigation of hyperspectral data from the Mars Reconnaissance Orbiter CompactReconnaissance Imaging Spectrometer for Mars (CRISM) and the Observatoire pour la Minéralogie, L'Eau, les Glaces et l'Activitié (OMEGA) on Mars Express has revealed an increasingly diverse suite of minerals present on the Martian surface. A revised set of 60 spectral parameters derived from corrected spectral reflectance at key wavelengths in CRISM targeted observations and designed to capture the known diversity of surface mineralogy on Mars is presented here as "summary products." Some of the summary products have strong heritage to OMEGA spectral parameter calculations; this paper also presents newly derived parameters that highlight locations with more recently discovered spectral signatures. Type locations for the diversity of currently identified mineral spectral signatures have been compiled into a library presented in this work. Our analysis indicates that the revised set of summary products captures the known spectral diversity of the surface, and successfully highlights and differentiates between locations with differing spectral signatures. The revised spectral parameter calculations and related products provide a useful tool for scientific interpretation and for future mission landing site selection and operations.

The stratigraphy and history of Mars' northern lowlands through mineralogy of impact craters: A comprehensive survey

“…The temperature at a depth of 2 km could vary from 35 to 90°C for estimated geothermal gradients in the Noachian, depending on surface temperature [Borlina et al, 2015], encompassing the typical transition temperatures from Fe/Mg smectite to illite or chlorite on Earth [e.g., Velde, 1985]. The preservation of the juvenile mineralogy in the northern lowlands, similar to the southern highlands, indicates a weak geothermal gradient and/or low surface temperature since time of burial or the lack of postdepositional water for diagenetic maturation or both [Tosca and Knoll, 2009].…”

Using VSWIR microimaging spectroscopy to explore the mineralogical diversity of HED meteorites

“…SAM results were interpreted to address the adequacy of the hand selected endmembers in fully characterizing the scene, and more endmembers were selected using N-dimensional visualization if deemed necessary. Spectral parameter mapping designed to search for the presence of absorption features in locations of known geologic materials was also employed [10]. …”

Geospatial web services pave new ways for server-based on-demand access and processing of Big Earth Data

“…In the example presented, only the L observations are used, as it is aimed to characterise the minerals kaolinites and Fe/Mg smectites that have a particular electromagnetic response within the L observation range. Viviano-Beck et al (2014 ) and Pelkey et al (2007 ) developed sets of band combinations so mineral characteristics can easier be retrieved for CRISM data. Both provide band math equations, called CRISM products, which help to highlight different types of minerals in a particular colour.…”

“…The tool is written in Python and a user only requires the name of the image to be analysed and the name of the three CRISM products to be used (taken either from Pelkey et al 2007or Viviano-Beck et al 2014. In principle, the tool helps a user to generate a WCPS query so she can retrieve the processed CRISM image with the selected combination as GeoTiff.…”