Phyllosilicate Diversity and Past Aqueous Activity Revealed at Mawrth Vallis, Mars

@article{Bishop2008PhyllosilicateDA,
  title={Phyllosilicate Diversity and Past Aqueous Activity Revealed at Mawrth Vallis, Mars},
  author={J. Bishop and E. Dobrea and N. K. McKeown and M. Parente and B. Ehlmann and J. Michalski and R. Milliken and F. Poulet and G. Swayze and J. Mustard and S. Murchie and J. Bibring},
  journal={Science},
  year={2008},
  volume={321},
  pages={830 - 833}
}
Observations by the Mars Reconnaissance Orbiter/Compact Reconnaissance Imaging Spectrometer for Mars in the Mawrth Vallis region show several phyllosilicate species, indicating a wide range of past aqueous activity. Iron/magnesium (Fe/Mg)–smectite is observed in light-toned outcrops that probably formed via aqueous alteration of basalt of the ancient cratered terrain. This unit is overlain by rocks rich in hydrated silica, montmorillonite, and kaolinite that may have formed via subsequent… Expand
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References

SHOWING 1-10 OF 19 REFERENCES
Hydrated silicate minerals on Mars observed by the Mars Reconnaissance Orbiter CRISM instrument
TLDR
The diversity of phyllosilicate mineralogy is expanded with the identification of kaolinite, chlorite and illite or muscovite, and a new class of hydrated silicate (hydrated silica). Expand
Phyllosilicates in the Mawrth Vallis region of Mars
[1] OMEGA/Mars Express has discovered large outcrops rich in phyllosilicates in the region of Mawrth Vallis, Mars (around 20°W, 25°N). The region is located in Noachian highly cratered terrains,Expand
Incipient hydrothermal alteration of basalts and the origin of martian soil
The martian soil is a fine-grained regolith that is chemically basaltic in character with evidence for both gains and losses of volatile and mobile elements compared to martian basalt compositions.Expand
Evidence for a sedimentary origin of clay minerals in the Mawrth Vallis region, Mars
Clay minerals detected spectroscopically in the Mawrth Vallis region of Mars correspond to a complex, layered, thick (>600 m) stratigraphic section of ancient bedrock. Because the light-toned,Expand
Characterization of alteration products in tephra from Haleakala, Maui: A visible-infrared spectroscopy, Mössbauer spectroscopy, XRD, EMPA and TEM study
Altered basaltic tephra from Haleakala, Maui, are characterized using multiple techniques in order to identify the minerals formed under a variety of conditions and to understand the soil formationExpand
Phyllosilicates on Mars and implications for early martian climate
TLDR
It is inferred that the two main families of hydrated alteration products detected—phyllosilicates and sulphates—result from different formation processes, which occurred during two distinct climatic episodes: an early Noachian Mars, resulting in the formation of Hydrated silicates, followed by a more acidic environment, in which sulphates formed. Expand
Compositional stratigraphy of clay‐bearing layered deposits at Mawrth Vallis, Mars
Phyllosilicates have previously been detected in layered outcrops in and around the Martian outflow channel Mawrth Vallis. CRISM spectra of these outcrops exhibit features diagnostic of kaolinite,Expand
Mars Surface Diversity as Revealed by the OMEGA/Mars Express Observations
TLDR
The OMEGA investigation, on board the European Space Agency Mars Express mission, has identified and mapped mafic iron-bearing silicates of both the northern and southern crust, localized concentrations of hydrated phyllosilicates and sulfates but no carbonates, and ices and frosts with a water-ice composition of the north polar perennial cap. Expand
Effects of Iron Oxidation State on the Texture and Structural Order of Na-Nontronite Gels
Aqueous gels of unaltered (oxidized) and chemically reduced ferruginous smectite (SWa-1 from the Source Clays Repository of The Clay Minerals Society) were characterized by transmission electronExpand
A Global View of Martian Surface Compositions from MGS-TES
Thermal Emission Spectrometer (TES) data from the Mars Global Surveyor (MGS) are used to determine compositions and distributions of martian low-albedo regions. Two surface spectral signatures areExpand
...
1
2
...