Abstract
Field, field, field... we acknowledge M. Bouabdellah, D. Banks and A. Klugel for reminding us that geology starts with strong field work. Alkaline-type rocks effectively do occur in the El Hammam district and have not been considered in our paper. However, the presence of lamprophyric dykes as mentioned by several authors cited by Bouabdellah et al. and their relevance for the fluorite mineralization must be considered with caution as:
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