Physics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.3401g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E2, p. 3401-3411.
Physics
40
Basalt, Mars Surface, Mineralogy, Planetary Geology, Regolith, Spectral Reflectance, Mars, Analogs, Mineralogy, Palagonites, Basalt, Tephra, Spectroscopy, Laboratory Studies, Samples, Terrestrial, Reflectance, Microscopy, Xrd, X-Ray Methods, Magnetic Properties, Microprobe Methods, Empa, Tem, Sem, Electron Microscopy, Description, Composition, Size, Particles, Origin, Formation, Hematite, Smectite, Infrared, Wavelengths, Petrography, Clay, Sand, Iron Oxides, Reflectivity
Scientific paper
The paper characterizes the mineralogy and spectral properties of three slightly palagonitized basaltic tephra samples collected near the summit of Mauna Kea in order to contribute to the basis for inferring mineralogy and processes for Martian surface materials. The mineralogy of size fractions of these samples is examined by diffuse reflectance and FIR spectroscopy, optical microscopy, X-ray diffraction, Moessbauer spectroscopy, magnetic analysis, EMPA, TEM, and SEM. For the 20-1000 micron size fraction, sample HWMK11 (red) is essentially completely oxidized and has a hematite (Ti-hematite) pigment dispersed throughout the silicate matrix. Sample HWMK12 (black) has the lowest proportion of ferric-bearing phases and is thus least weathered. For HWMK11, the amount of hematite is essentially constant, and mica is present only in the coarse clay-sized fraction; smectites are low in structural Fe.
Golden D. C.
Lauer Vern H.
Ming Douglas W.
Morris Richard V.
Yang Ru-Shu
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