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Orbital evidence for more widespread carbonate‐bearing rocks on Mars

Authors
  • James J, Wray
  • Scott L, Murchie
  • Janice Bishop
  • Bethany L, Ehlmann
  • Ralph E, Milliken
  • Mary Beth, Wilhelm
  • Kimberly D, Seelos
Type
Published Article
Journal
Journal of Geophysical Research: Planets
Publication Date
Mar 31, 2016
Volume
121
Issue
4
Pages
652–677
Source
SETI Institute
License
Unknown

Abstract

Carbonates are key minerals for understanding ancient Martian environments because they are indicators of potentially habitable, neutral-to-alkaline water and may be an important reservoir for paleoatmospheric CO 2. Previous remote sensing studies have identified mostly Mg-rich carbonates, both in Martian dust and in a Late Noachian rock unit circumferential to the Isidis basin. Here we report evidence for older Fe-and/or Ca-rich carbonates exposed from the subsurface by impact craters and troughs. These carbonates ...

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