Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p21a0215k&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #P21A-0215
Other
5410 Composition, 5460 Physical Properties Of Materials, 5464 Remote Sensing
Scientific paper
Gray, crystalline hematite deposits have been identified by data from MGS TES at three areas on Mars: Meridiani Planum, Aram Chaos, and Valles Marineris. Remote sensing studies of the deposits at Meridiani Planum and Aram Chaos indicate that hematite occurs in relatively large, coherent, in-place stratigraphic units. In situ studies at the Meridiani Planum site by the MER Opportunity have revealed that the hematite is likely carried in spheroidal concretions that form lag deposits as they weather out of in-situ sedimentary layered deposits. The hematite occurrences in Valles Marineris are small, 5 - 35 km in diameter, and are discontinuous throughout the canyon system. In this study THEMIS, MOC, MOLA and TES data are used to investigate the geomorphology, composition, and thermophysical characteristics of hematite bearing deposits throughout the canyon system and compare them to the other hematite deposits on Mars. Hematite bearing deposits in Valles Marineris span an total elevation range of 5600m. Preliminary evaluation indicates no clear correlation of with latitude or longitude. In Ophir and Candor Chasmata, hematite is associated with relatively dark materials near or within interior layered deposits and may represent in-place units or erosional remnants. Deconvolution of TES spectra from Candor Chasma show hematite abundances from 5 to 12%. Associated materials exhibit compositions similar to TES Surface Type II, which has been described as a basaltic andesite or weathered basalt. In Capri Chasma hematite signatures generally correlate with layered units, which lie at similar elevations, and are within 1km of the mean. Dunes overlying and obscuring layered deposits do not contain hematite. Benches and breaks in slope near the boundaries of many layered deposits provide further evidence that the layers may represent in-place, stratigraphic units. Hematite in Capri Chasma may have formed in a single event, which involved deposition or reworking in standing water.
Christensen Per Rex
Knudson Amy T.
No associations
LandOfFree
Hematite in Valles Marineris: Context, Composition, Distribution, Morphology, Physical Properties, and Comparison to Other Mars Hematite Deposits does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hematite in Valles Marineris: Context, Composition, Distribution, Morphology, Physical Properties, and Comparison to Other Mars Hematite Deposits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hematite in Valles Marineris: Context, Composition, Distribution, Morphology, Physical Properties, and Comparison to Other Mars Hematite Deposits will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1647046