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Mars

Bell J. F. III Bustani D. Correlations Between Multispectral and Compositional Properties of Soils and Rocks at the Mars Pathfinder Landing Site [#1388] We are performing an exhaustive search for correlations between IMP multispectral parameters and APXS chemistry. Our results show the strongest correlations between red/blue and Mg, S, Cl, Si, and Al. Weaker correlations with red/near-IR are also noted.

Crooks J. L. Geology of Schroeter Impact Basin, Mars [#1312] A geological study of Schroeter impact basin, Mars. The current surface geology is studied and a possible basin history is proposed.

Crumpler L. S. Southwestern Isidis Basin Margin, Mars Surveyor Landing Site: Summary of Geologic Assessment and New Mgs Data [#2015] This study summarizes the results of geologic and surface engineering analysis of an area on the southwestern border of Isidis Planitia.

Crumpler L. S. MOLA Data for Arsia Mons: New Constraints on Caldera Formation [#2036] MOLA data for orbit 033 crossed the Arsia Mons edifice and the summit caldera. Review of some of the results anticipate some of relief details and structural insights to be expected during the primary phase of the MGS mission.

Greeley R. Mars Pathfinder Landing Site: Simulations of Wind Erosion and Deposition [#1300] The Mars Pathfinder site was simulated in a wind tunnel test which suggested that the site was subjected to a predominantly deflational (erosional) wind regime.

Greeley R. Coquilla R. Wilson G. White B. Haberle R. Soriano J. F. Bratton C. Mars Dust: Laboratory Experiments of Flux as a Function of Surface Roughness [#1189] The Mars Pathfinder landing site appears to have been subject to net deflation (erosion) by wind, based on wind tunnel simulations of the site which reveal distinctive morphological features for net deflation versus net deposition.

Jolliff B. L. Wang A. Keubler K. Haskin L. A. Klingelhöfer G. Raman and Mössbauer Characterization of a Rock for Potential Use as an On-Site Calibration Target for In Situ Mineralogy Instruments on the Athena Rover for Mars Surveyor Missions [#1529] We describe laser Raman and Mössbauer analyses of an on-surface calibration rock target for the Athena Rover. The rock is a magnetite-rich calc-silicate that provides hydrated silicates for Raman calibration and Fe mineralogy for the Mössbauer.

Marshall J. Bratton C. Kosmo J. Trevino R. Interaction of Space Suits with Windblown Soil: Preliminary Mars Wind Tunnel Results [#1239] Mars Wind Tunnel experiments at NASA Ames show that space suit materials are highly susceptibility to dust adhesion when exposed to windblown soil. Long-term function of space suits on Mars could be threatened by the tenacity of the dust contamination. Michael G. G. Rodionova J. F. The Difference Between the Crater Distribution on the Highland and Plains of Mars in Terms of Rim Degradation [#1361] A statistical analysis of a data bank of more than 19,000 martian craters shows that there is a difference in the density distribution of craters in terms of their preservation on the martian plains and highlands.

Morris R. V. Elemental Compositions of Local Rocks and Global Soil at Pathfinder and Viking Landing Sites: Evidence for Ongoing Comminution of Martian Rocks [#1151] Major-element correlations at Pathfinder and Viking landing sites are consistent with a model where local soils are two-component mixtures of fragments of local rock and globally-distributed average martian soil, implying ongoing comminution of rocks.

Nikolaeva O. V. Abdrakhimov A. M. Rocks of Andesitic Composition at the Mars Pathfinder Site Reveal Chemical Analogy with Subduction-related Andesites of Earth [#1376] According to McSween et al. (1998), Mars Pathfinder andesite composition is most similar to terrestrial andesites (icelandites) unrelated to subduction, rather than to subduction-related. Our conclusion here is the quite opposite.

Plescia J. B. Geology of Ceraunius Tholus, Mars [#1632] Ceraunius Tholus is a Late Hesperian age basaltic shield volcano in northeast Tharsis formed by both effusive lavas and pyroclastic eruptions. Pyroclastics are basaltic and formed by the interaction of ascending magma and ground water/ice.

Plescia J. B. Cerberus Plains — Source for the Young SNCs? [#1627] Cerberus Plains are interpreted to be the source for some SNCs. The plains are low-viscosity lavas erupted at high rates at 143±40Ma. Shergotty, Zagami, EETA79001, ALH77005 and LEW88516 are basaltic, have ages of 180 Ma and low viscosity and are consistent with a Cerberus source.

Plescia J. B. Geology of Uranius Tholus, Mars [#1648] Uranius Tholus is a small basaltic shield volcano in northeast Tharsis. It is the product of both effusive and pyroclastic eruptions. Based on the geology and regional volcanic context, Uranius Tholus is considered to be Late Hesperian rather than Noachian.

Rochelle W. C. Kirk B. Smith N. DeVall M. Hörz F. Atmospheric Entry and Survival of Small Meteorites on Mars [#1651] Computer calculations/models to determine minimum size, density, and velocity of meteorites that would permit such objects to survive passage through the martian atmosphere and impact the martian surface.

Schultz R. A. Planetary Fault Populations Revisited [#1056] Recent concepts of fault populations have revolutionized how geologists think about brittle deformation. The techniques are analogous to crater statistics and are useful for geologic mappers and those measuring brittle strain.

Stern S. A. Levison H. F. A Warm Early Mars and CO2 Influx from the Late Heavy Bombardment [#1141] We find that a sufficient influx of CO2 was imported to Mars by cometary bombardment during the Late Heavy Bombardment to have induced a one-to-several bar CO2 atmosphere and its consequent warming to a state capable of allowing surface water to have existed on Mars. Wang A. Some Grain Size Effects on Raman Scattering Intensity for In Situ Measurements on Rocks and Soils — Experimental Tests and Modeling [#1644] The major factors affecting the strength of Raman signals obtained from in situ measurements of rocks and soils are discussed. Experiments show that signal strength decreases with decreasing grain size but not drastically.

Watters T. R. Robinson M. S. Topographic Studies of Lobate Scarps Near the Martian Crustal Dichotomy Using MOLA Data [#1865] MOLA data is being used to study martian lobate scarps in the Amenthes region, near the crustal dichotomy. The dimensions and morphology of a lobate scarp crossed by a MOLA profile agree well with other scarps studied using photoclinometric data.