Composition, Morphology, and Stratigraphy of Noachian Crust around the Isidis basin

  title={Composition, Morphology, and Stratigraphy of Noachian Crust around the Isidis basin},
  author={John F. Mustard and Bethany L. Ehlmann and Scott L. Murchie and François Poulet and Nicolas Mangold and James W. Head and J. P. Bibring and Leah Hutchison Roach},
  journal={Journal of Geophysical Research},
Definitive exposures of pristine, ancient crust on Mars are rare, and the finding that much of the ancient Noachian terrain on Mars exhibits evidence of phyllosilicate alteration adds further complexity. We have analyzed high-resolution data from the Mars Reconnaissance Orbiter in the well-exposed Noachian crust surrounding the Isidis basin. We focus on data from the Compact Reconnaissance Imaging Spectrometer for Mars as well as imaging data sets from High Resolution Imagine Science Experiment… 
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[1] The Nili Fossae region located on the northwestern quadrant of the Isidis Basin, Mars, displays superb exposures of bedrock outcrops that reveal mineralogy and composition of the crust. Previous
Identification of hydrated silicate minerals on Mars using MRO‐CRISM: Geologic context near Nili Fossae and implications for aqueous alteration
The Noachian terrain west of the Isidis basin hosts a diverse collection of alteration minerals in rocks comprising varied geomorphic units within a 100,000 km2 region in and near the Nili Fossae.
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[1] The stratigraphy and mineral heterogeneity of surface and crater-exposed deposits in the southwestern portion of the Isidis Basin were investigated using spatial, spectral, visible, and
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Phyllosilicates on Mars and implications for early martian climate
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.
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The occurrence of shock metamorphic features substantiates an impact origin for the 1.85 Ga old Sudbury Structure, but this has not been universally accepted. Recent improvements in knowledge of
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