Abstract
Hydrogeological and geochemical studies of the Ketarra abandoned mine watershed showed that the groundwater chemical facies is linked to the drained schist. δ2H and δ18O isotope analysis revealed the influence of evaporation. High levels of dissolved ions, including sulphate, in groundwater collected down-gradient of pyrrhotite tailings are evidence of acid mine drainage. However, the groundwater is low in metals and generally complies with Morocco’s drinking water standards; only wells down-gradient of the mine waste is not of good quality. Most of the groundwater is acceptable for irrigation and all of it can be used for livestock.
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