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The Windjana drill sample, a sandstone of the Dillinger member (Kimberley formation, Gale Crater, Mars), was analyzed by CheMin X-ray diffraction (XRD) in the MSL Curiosity rover. From Rietveld refinements of its XRD pattern, Windjana contains the following: sanidine (21% weight, ~Or 95); augite (20%); magnetite (12%); pigeonite; olivine; plagioclase;(More)
Introduction: Basaltic pyroclastic rocks are uncommon on Earth because most mafic magmas are too volatile-poor to drive explosive eruptions [3-4]. However , basaltic pyroclastic deposits maybe much more common on Mars than on Earth [4-7] because Mars' lower gravity and thinner atmosphere permit explosive eruptions from magmas with lower volatile contents.(More)
6234. Justin Filiberto, Emily Chin, James M.D. Day, Juliane Gross, Sarah C. Penniston-Dorland, Susanne P. Schwenzer, and Allan H. Treiman.Southern Illinois University Carbondale, Department of Geology, 1259 Lincoln Road, Mailcode 4324, Carbondale, Il 62901, 618-453-4849, email: filiberto@siu.edu. 2 Rice University, Department of Earth Science, 6100 Main(More)
The Open University's repository of research publications and other research outputs Alteration mineralogy of the Home Plate and Columbia Hills – formation conditions in context to impact, volcanism, and fluvial activity Journal Article Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright(More)
Introduction: Knowledge of martian igneous and mantle composition is crucial for understanding mantle evolution including early differentiation, mantle convec-tion and the chemical alteration of the surface. Primitive magmas provide critical information on their mantle source regions but most Martian meteorites crystallized from fractionated melts [1]. The(More)
Introduction: High chlorine abundances have been reported on the Martian surface, suggesting that Cl is widespread on Mars. GRS elemental mapping has shown that Cl is not composition-ally uniform across the surface of Mars and has a range from 0.2-1 wt% [1]. The MER rovers have confirmed the high Cl concentrations with soil analysis up to 1 wt% Cl [2]. The(More)
Fluvial features and evidence for aqueous alteration indicate that Mars was wet, at least partially and/or periodically, in the Noachian. Also, impact cratering appears to have been the dominant geological process [1] during that epoch. Thus, investigation of Noachian craters will further our understanding of this geologic process, its effects on the(More)
The Mars Exploration Rover Spirit investigated the igneous and alteration mineralogy and chemistry of Home Plate and its surrounding deposits. Here, we focus on using thermochemical modeling to understand the secondary alteration mineralogy at the Home Plate outcrop and surrounding Columbia Hills region in Gusev crater. At high temperatures (300 °C),(More)