Distribution of hydrated minerals in the north polar region of Mars

B. H. Horgan, James Bell, E. Z Noe Dobrea, E. A. Cloutis, D. T. Bailey, M. A. Craig, L. H. Roach, J. F. Mustard

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The previous discovery of extensive deposits of hydrated minerals in Olympia Planum in the north polar region of Mars by the Mars Express OMEGA instrument raises important questions about the origin and subsequent redistribution of these hydrated minerals. Here we present a new map of the distribution of hydrated minerals within the north polar region of Mars by applying both standard and new spectral analysis techniques to near-infrared spectral data from OMEGA. Our results are in agreement with the previous OMEGA observations but also show more extensive detections of hydrated minerals throughout the circumpolar plains, as well as new detections of hydrated minerals on the surface of Planum Boreum and within the polar troughs. We find that while the circumpolar plains hydration signatures appear to be correlated with the dark dunes of the north polar erg, hydration signatures in Planum Boreum instead appear to be correlated with the north polar veneers and their sources within the polar layered deposits. By applying laboratory-derived empirical models of the dependence of gypsum spectra on grain size and abundance, we provide approximate abundance estimates for the hydrated minerals we have identified in Observatoire pour la Minéralogie, l'Eau, les Glaces et l'Activité (OMEGA) and Compact Reconnaissance Imaging Spectrometer (CRISM) data. We find that the presence of hydrated minerals throughout the north polar region suggests (1) a complex cycle of sediment exchange between the Olympia Planum dunes and the other polar units; (2) an earlier origin for the hydrated minerals than originally postulated; and (3) the occurrence of significant water activity in this region during the Amazonian.

Original languageEnglish (US)
Article numberE01005
JournalJournal of Geophysical Research E: Planets
Volume114
Issue number1
DOIs
StatePublished - Jan 20 2009
Externally publishedYes

Fingerprint

polar region
polar regions
mars
Minerals
Mars
minerals
Temazepam
mineral
dunes
plains
hydration
Hydration
dune
Deposits
deposits
signatures
veneers
Mars Express
Calcium Sulfate
Veneers

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Horgan, B. H., Bell, J., Dobrea, E. Z. N., Cloutis, E. A., Bailey, D. T., Craig, M. A., ... Mustard, J. F. (2009). Distribution of hydrated minerals in the north polar region of Mars. Journal of Geophysical Research E: Planets, 114(1), [E01005]. https://doi.org/10.1029/2008JE003187

Distribution of hydrated minerals in the north polar region of Mars. / Horgan, B. H.; Bell, James; Dobrea, E. Z Noe; Cloutis, E. A.; Bailey, D. T.; Craig, M. A.; Roach, L. H.; Mustard, J. F.

In: Journal of Geophysical Research E: Planets, Vol. 114, No. 1, E01005, 20.01.2009.

Research output: Contribution to journalArticle

Horgan, BH, Bell, J, Dobrea, EZN, Cloutis, EA, Bailey, DT, Craig, MA, Roach, LH & Mustard, JF 2009, 'Distribution of hydrated minerals in the north polar region of Mars', Journal of Geophysical Research E: Planets, vol. 114, no. 1, E01005. https://doi.org/10.1029/2008JE003187
Horgan, B. H. ; Bell, James ; Dobrea, E. Z Noe ; Cloutis, E. A. ; Bailey, D. T. ; Craig, M. A. ; Roach, L. H. ; Mustard, J. F. / Distribution of hydrated minerals in the north polar region of Mars. In: Journal of Geophysical Research E: Planets. 2009 ; Vol. 114, No. 1.
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