Mathematics – Logic
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p42c..06r&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P42C-06
Mathematics
Logic
[5410] Planetary Sciences: Solid Surface Planets / Composition, [5415] Planetary Sciences: Solid Surface Planets / Erosion And Weathering, [5464] Planetary Sciences: Solid Surface Planets / Remote Sensing, [8450] Volcanology / Planetary Volcanism
Scientific paper
Sediment/regolith history, mobility, and mantling of the underlying bedrock are important for understanding the Martian climate and surface history. Eolian processes on Mars cover many bedrock surfaces with sand and dust and significantly influence how we interpret infrared data of those surfaces. These deposits are either derived locally, retaining the chemical/spectral signatures of the underlying rocks; or more commonly are globally-homogenized, obscuring the surface below and hindering accurate identification and volcanic interpretation. Eolian processes continue to be active to the present day on Mars, as indicated by observed bedform changes, active saltation at landing sites, and the presence of low albedo/high thermal inertia surfaces that remain swept clean of dust. Although not as pervasive on Earth, surface mantling does arise from a variety of processes such as sand transport and pyroclasts from volcanic eruptions. Terrestrial volcanoes can serve as important process analog locations for testing both geologic and image processing techniques designed to decouple the mantling overprint from the underlying rock. The general objective of a newly-funded NASA project is to examine moderate- to heavily- mantled terrestrial lava flows in order to accurately constrain their composition, the volcanic history of the area, and the nature and magnitude of the modification. Extraction of the lava composition should be possible using a combination of advanced thermal infrared/visible-near infrared (TIR/VNIR) image processing/spectroscopy techniques, and geomorphic field-based analyses. We have begun to apply this approach to the mantled lava flows at the Mono Craters, CA and southern Arsia Mons on Mars.
Crown David A.
Ramsey Michael S.
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