Origin of the Bouarfa Manganese ore deposit (Eastern High Atlas, Morocco): insights from petrography and geochemistry of the mineralization

Ludovic Lafforgue, Jocelyn Barbarand, Yves Missenard, Benjamin Brigaux, Bertrand Saint-Bézar, Augustin Dekoninck, Johan Yans

Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

Abstract

Abstract. The Bouarfa ore deposit represents one of the
main Manganese ore deposits of Morocco. The
mineralization corresponds to a stratabound deposit in a
liassic dolostone unit. Previous studies have suggested
that this deposit has been formed during sedimentation at
the sedimentary water interface. However, the location of
the Bouarfa district along the North Atlasic Front in a fold
cut by a thrust fault questions the influence of this
structure on the mineralization, its origin and evolution.
The petrographic characterization of the dolostone
emphasizes a late diagenetic dolomitization process prior
to Mn mineralization. Moreover, petrographical, mineralogical
and trace element geochemistry demonstrate that
the fluids involved in the mineralization precipitated Mn
tunnel-like structure oxides in a high oxidised
environment. The fluids probably derived from hydrothermal
systems. These elements argue for a postsedimentary
model for the mineralization.
Original languageEnglish
Title of host publicationOrigin of the Bouarfa Manganese ore deposit (Eastern High Atlas, Morocco): insights from petrography and geochemistry of the mineralization
Place of PublicationNancy
Pages259-262
Volume5
EditionSGA
Publication statusPublished - 25 Aug 2015
Event13th SGA Biennial Meeting - Palais des Congrès, Nancy, France
Duration: 24 Jul 201527 Aug 2015

Conference

Conference13th SGA Biennial Meeting
CountryFrance
CityNancy
Period24/07/1527/08/15

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