Sedimentary manganese deposit of Cretaceous age.
Located in the Atlas mountains, about 160 km southeast of Marrakech.
The "Pyrolusites" from Imini are in fact Manganites partially replaced by Pyrolusite (analyzed), so the best description of them would be: Pyrolusite replacing Manganite.
Mineral List
6 entries listed. 6 valid minerals.
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References
- Force, E.R., Back, William, Spiker, E.C., and Knauth, L.P. (1986): A ground-water mixing model for the diagenesis of the Imini manganese deposit (Cretaceous) of Morocco: Economic Geology, 81, 65-79.
- Gutzmer, J.; Beukes, N. J.; Rhalmi, M.; Mukhopadhyay, J. (2006): Cretaceous karstic cave-fill manganese-lead-barium deposits of Imini, Morocco. Economic Geology 101, 385-405.
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