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Hydrated Sulfates in Candor Chasma
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Hydrated Sulfates in Candor Chasma

Acquired Date: September 30, 2007
Release Date: February 21, 2014
Latitude: 5.63 S
Longitude: 75.42 W
Keywords: Chaos/Chasmata, Hydrated Mineral, Layered Mineral, Sulfate minerals, Valles Marineris
Parameters: BD1900R/BD1950 (H2O), BD2100_2 (Monohydrated sulfates), SINDEX2 (Hydrated mineral)

Candor Chasma is a deep, elongate, steep-sided depression about 800 kilometers (about 500 miles) in length, forming just one part of of the Valles Marineris canyon system in the equatorial part of Marsí western hemisphere. If it were located on Earth, Candor Chasma would extend the distance between Juneau and Anchorage, Alaska! Like other parts of Valles Marineris, Candor contains sedimentary deposits rich in sulfate minerals. This image shows two major classes of sulfates distinguished by the amount of water bound into the mineralsí crystal structures. Monohydrated sulfates (sulfates with one water molecule incorporated into each molecule of the mineral), shown in yellow, appear concentrated along the sides of the eroded mound of sedimentary rock. Polyhydrated sulfates (sulfates with more than one water molecule incorporated into each molecule of the mineral), shown in purple, appear to be more common along the top of the mound of sediments .



Candor Chasma is a deep, elongate, steep-sided depression about 800 kilometers (about 500 miles) in length, forming just one part of of the Valles Marineris canyon system in the equatorial part of Marsí western hemisphere. If it were located on Earth, Candor Chasma would extend the distance between Juneau and Anchorage, Alaska! Like other parts of Valles Marineris, Candor contains sedimentary deposits rich in sulfate minerals. This image shows two major classes of sulfates distinguished by the amount of water bound into the mineralsí crystal structures. Monohydrated sulfates (sulfates with one water molecule incorporated into each molecule of the mineral), shown in yellow, appear concentrated along the sides of the eroded mound of sedimentary rock. Polyhydrated sulfates (sulfates with more than one water molecule incorporated into each molecule of the mineral), shown in purple, appear to be more common along the top of the mound of sediments .

Candor Chasma is one of two large chasmata that make up the northern end of the Valles Marineris system and is part of a radial graben system. A graben is a surface feature bound by parallel faults that caused the crust between the faults to have dropped down relative to the surrounding terrain. The grabens in this region of Mars were created as volcanic processes formed the Tharsis bulge.

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, MOLA, CRISM, Google Earth.

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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