Implications of Martian and Terrestrial Jarosite. a Crystal Chemical

  title={Implications of Martian and Terrestrial Jarosite. a Crystal Chemical},
  author={James J. Papike and J. M. Karner and Charles K. Shearer},
INTRODUCTION. The importance of the discovery of jarosite at the Meridiani Planum region of Mars [1] is discussed. Terrestrial studies demonstrate that jarosite requires a unique environment for its formation. Jarosite crystallizes from highly acidic (pH < 4) aqueous solutions under highly oxidizing conditions from S-rich brines. A likely scenario for jarosite formation on Mars is that degassing of shallow magmas likely released SO2 that reacted with aqueous solutions in shallow aquifers or on… CONTINUE READING