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Fe/Mg phyllosilicates at the rim of Isidis Basin
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Fe/Mg phyllosilicates at the rim of Isidis Basin

Acquired Date: May 3, 2010
Release Date: January 23, 2015
Latitude: 3.22 N
Longitude: 84.56 E
Keywords: Crater Interior/Rim/Ejecta, Hydrated Mineral, Phyllosilicate minerals, Dichotomy Boundary
Parameters: BD2290 (Mg/Fe-OH minerals), BD2500H2 (Mg-carbonates), D2300 (Hydrated mineral)

This image is located right along the rim of the Isidis impact basin, at the foot of Libya Montes. Here we see iron-magnesium phyllosilicates (cyan). Phyllosilicates are clay and clay-like minerals formed by chemical reactions with liquid water. They are very thin (microscopic) stacked layer crystal forms, also called sheet silicates.



This image is located right along the rim of the Isidis impact basin, at the foot of Libya Montes. Here we see iron-magnesium phyllosilicates (cyan). Phyllosilicates are clay and clay-like minerals formed by chemical reactions with liquid water. They are very thin (microscopic) stacked layer crystal forms, also called sheet silicates.

Libya Montes is part of a series of mountains that rim the gigantic Isidis impact basin, one of the youngest well-preserved impact basins on Mars. Formation of the basin exposed a variety of phyllosilicate-rich rocks, some of which can be seen here. The craters’ scarring Mars’ face also act as nature’s probes into the composition and processes in the subsurface.

Link to further description of the spectral parameters shown in this image can be found here.

Disclaimer: Colors shown here represent indicators of mineralogy and are not what the human eye would see.

Acknowledgements: THEMIS, CRISM, Google Earth, MOLA.

The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is one of six science instruments on NASA's Mars Reconnaissance Orbiter. Led by The Johns Hopkins University Applied Physics Laboratory, the CRISM team includes expertise from universities, government agencies and small businesses in the United States and abroad.

CRISM's mission: Find the spectral fingerprints of aqueous and hydrothermal deposits and map the geology, composition and stratigraphy of surface features. The instrument also tracks seasonal variations in dust and ice aerosols in the Martian atmosphere, and water content in surface materials — leading to new understanding of the climate.

Credit: NASA/JPL/JHUAPL

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