2014
DOI: 10.1016/j.oregeorev.2013.08.015
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Non-sulfide zinc deposits of the Moroccan High Atlas: Multi-scale characterization and origin

Abstract: International audienceSix non-sulfide Zn-Pb ore deposits were investigated in the Moroccan High Atlas, to understand processes and timing of their formation. Sulfide and non-sulfide ores are hosted in Lower Jurassic reefal to para-reefal limestone. Zn (Pb) carbonates, Zn silicates and associated hydrated phases directly replace the stratabound primary ore bodies or fill cavities along fractures related to the Atlasic compression. Field observation has been complemented by a multidisciplinary approach (e.g. XRD… Show more

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Cited by 42 publications
(33 citation statements)
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References 72 publications
(112 reference statements)
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“…1A). The local geology of this deposit has been 81 extensively studied by Leblanc (1968) and recently revisited in Choulet et al (2014). …”
mentioning
confidence: 99%
“…1A). The local geology of this deposit has been 81 extensively studied by Leblanc (1968) and recently revisited in Choulet et al (2014). …”
mentioning
confidence: 99%
“…These calamine ores contain a mixture of supergene Zn (with minor Pb) carbonates (smithsonite), hydrated carbonates (hydrozincite), silicates (willemite) and hydrated silicates (hemimorphite, Zn clays) that cap the primary sulphide orebodies. Unlike most North African MVTs, this type of non-sulphide Zn ore deposits is largely confined to the central and eastern High Atlas Mountains (Goulet et al 2014; present study). Such deposits are being extensively prospected by the mineral industry because (Sangster 2003): (1) environment impacts from mining are minimal owing to a characteristic lack of Pb, S, and other deleterious elements, (2) a potential for low-energy recovery of zinc, and (3) a generally higher in situ economic value (Borg 2002).…”
Section: Ore Mineralogy Textures and Paragenesismentioning
confidence: 70%
“…Calamine ores occur both as cavity fillings and as partial to massive replacements of host carbonates in the upper levels of the exploited orebodies. It seems that their genesis benefited from the interplay among weathering, uplift, and erosion and that there is no apparent relationship to the present water table (Goulet et al 2014). …”
Section: Ore Mineralogy Textures and Paragenesismentioning
confidence: 99%
“…A large portion of the exploited ores corresponds to the non-sulfide secondary Pb-Zn mineralization studied in detail by Choulet et al (2014). These supergene minerals formed as a result of the oxidation of sulfides by meteoric water during the last 20 Ma (Choulet et al, 2014). The first abundant oxide assemblage, consisting of calamine ( Fig.…”
Section: Mineralization and Paragenetic Sequencementioning
confidence: 99%