On simfitting MER Mössbauer data to characterize Martian hematite
نویسندگان
چکیده
منابع مشابه
Characterization of the Effects of Precursor Mineralogy on Hematite Spectra: Application to Martian Hematite Mineralization
Introduction. The Thermal Emission Spectrometer (TES) instrument aboard Mars Global Surveyor discovered several isolated deposits of gray, crystalline hematite in Sinus Meridiani, Aram Chaos, and Valles Marineris. A variety of formation mechanisms has been proposed for the martian hematite deposits [1-5], including aqueous and nonaqueous processes. Comparison of the average Sinus Meridiani hema...
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INTRODUCTION The 2.0 Ga iron-bearing Gunflint Formation was deposited during a transitionary period in Earth history when a stable oxic atmosphere was being established. The Animikie Group, which comprises both the Rove and Gunflint Formations, extends NE-SW for approximately 175 km from Thunder Bay, Ontario to northern Minnesota [1]. The thickness of the Gunflint ranges from 100 to 180 m, with...
متن کاملMössbauer Spectroscopy on the Martian Surface: Constraints on Interpretation of Mer Data
Introduction: Mössbauer spectrometers will be used on martian landers and rovers to identify and quantify relative amounts of Fe-bearing minerals, as well as to determine their Fe/Fe ratios, allowing more realistic modeling of martian mineralogy and evolution. However, derivation of mineral modes, Fe/Fe ratios, and phase identification via Mössbauer spectroscopy (MS) does have limitations. We d...
متن کاملFresnel modeling of hematite crystal surfaces and application to martian hematite spherules
The gray crystalline hematite at Meridiani Planum first discovered by the Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES) instrument occurs as spherules that have been interpreted as concretions. Analysis of the TES and mini-TES spectra shows that no 390 cm−1 feature is present in the characteristic martian hematite spectrum. Here, we incorporate the mid-IR optical constants of hem...
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[1] We have used new compositional information on Martian basaltic rocks from the Mars Exploration Rover Spirit and data from new stereo imaging by the High Resolution Stereo Camera (HRSC) on the Mars Express orbiter to constrain an existing analyticalnumerical computer model to assess the potential of Martian lavas to form lava channels by erosion of substrate. The basaltic rocks studied in Gu...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2010
ISSN: 1742-6596
DOI: 10.1088/1742-6596/217/1/012063