Shock-induced color changes in nontronite: Implications for the Martian fines
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چکیده
منابع مشابه
Shock-induced Color Changes in Nontronite: Implications for the Martian Fines
Riverside nontronite, a candidate for Team. This material was one of the best early the major mineral in the Martian fines, becomes matches for the Viking XRF spectra [Clark et al., both redder and darker upon shock loading between 1977] and has been used as a base for subsequent 180 and 300 kbar. The change from olive-yellow mixing experiments to match the Martian fines (2.5 Y 6/6) to strong b...
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Layered and massive outcrops on Mars, some as thick as 4 km, display the geomorphic attributes and stratigraphic relations of sedimentary rock. Sequences in some locations imply a dynamic depositional environment during early martian history. Subaerial (such as aeolian, impact, and volcani-clastic) and subaqueous processes may have contributed to the formation of the layers. Affinity for impact...
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The Fe-rich smectite nontronite M1.05[Si6.98Al1.02][Al0.29Fe3.68Mg0.04]O20(OH)4 has been detected using orbital data at multiple locations in ancient terrains on Mars, including Mawrth Vallis, Nilli Fossae, north of the Syrtis Major volcanic plateau, Terra Meridiani, and the landing site of the Mars Science Laboratory (MSL), Gale Crater. Given the antiquity of these sites (>3.0 Ga), it is likel...
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The composition of the silicate portion of Martian regolith fines indicates derivation of the fines from mafic to ultramafic igneous rocks, probably rich in pyroxene. Rock types similar in chemical and mineralogical composition include terrestrial Archean basalts and certain achondrite meteorites. If these igneous rocks weathered nearly isochemically, the nontronitic clays proposed earlier as a...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 1982
ISSN: 0148-0227
DOI: 10.1029/jb087ib12p10102