End member formation ( jarosite and natrojarosite ) is favoured by a low temperature environment, less than 100 �C, and is illustrated by the oscillatory zoning of jarosite and natrojarosite found in samples from the Apex Mine, Arizona, and Gold Hill, Utah.
42.
End member formation ( jarosite and natrojarosite ) is favoured by a low temperature environment, less than 100 �C, and is illustrated by the oscillatory zoning of jarosite and natrojarosite found in samples from the Apex Mine, Arizona, and Gold Hill, Utah.
43.
*jarosite ( KFe ( OH ) 6 ( SO 4 ) 2 ), discovered on Mars by Opportunity and on Earth forms either in acid mine drainage, during oxidation of sulphide minerals2, and during alteration of volcanic rocks by acidic, sulphur-rich fluids near volcanic vents
