Mathematics – Logic
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p41a..10a&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P41A-10
Mathematics
Logic
5464 Remote Sensing, 5470 Surface Materials And Properties, 6225 Mars
Scientific paper
Geologic mapping from 10 deg N to 5 deg S, 12 deg W to 5 deg E, using MDIM, MOLA, and MOC NA data show that the terrains consist of tilted and dissected Noachian cratered material that has been overlain with up to 800 m of widespread, layered deposits. These deposits, including the hematite unit mapped from TES, have been eroded by wind, exposing the overall stratigraphic sequence. Analyses of TES-based thermal inertia and albedo, together with MOLA-derived corrected pulse widths (CPW, corrected for regional tilt) for the study area show that several factors control remote sensing properties of the mapped units. First, high albedo and CPW, low thermal inertia surfaces dominate the northern portion, without much regard for local bedrock units. These trends are associated with the Arabia rise and are probably due to regional-scale enhanced net dust deposition rates relative to surrounding low-lands. Second, crater interiors have high thermal inertia and CPW values, with low to mixed albedo values, reflecting a combination of intrinsic crater floor and rim properties and modulation of aeolian deposits superimposed on those surfaces. Third, some geologic units, particularly in the southern portion of the study area, show spatial patterns that conform to outcrop patterns. For example, the hematite deposit has low albedo, thermal inertia, and CPW, whereas what appear to be lithified, partially eroded dune fields to the north and east of the hematite exposures have high thermal inertia and CPW along with variable albedo. In sum, remote sensing properties indicate a range of trends, from regional scale patterns decoupled from local terrain and bedrock type to strong modulation by the units present at any given location.
Arvidson Ray E.
Deal Kim
Garvin James
Hynek Brian
Mellon Michael
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