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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Age and depositional environment of the Draa Sfar massive sulfide deposit, Morocco
Mineralium Deposita, Volume 43, No. 8, Year 2008
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Description
The Draa Sfar mineralization consists of two main stratabound orebodies, Sidi M'Barek and Tazacourt, located north and south of the Tensift River ("Oued Tessift"), respectively. Each orebody is comprised by at least two massive sulfide lenses. The hosting rocks are predominantly black shales, although minor rhyolitic rocks are also present in the footwall to the southern orebody. Shales, rhyolitic volcanic rocks, and massive sulfides are all included into the Sarhlef Series, which is recognized as one of the main stratigraphic units of the Moroccan Variscan Meseta. Hydrothermal activity related with an anomalous thermal gradient, together with a high sedimentation rate in a tectonically driven pull-apart marine basin, favored the accumulation of organic-rich mud in the deepest parts of the basin and the sedimentary environment suitable for massive sulfide deposition and preservation. This took place by replacement of the hosting unlithified wet mud below the sediment-water interface. Geochemical data suggest a sedimentary environment characterized by oxic water column and anoxic sediment pile with the redox boundary below the sediment-water interface. The low oxygen availability within the sediment pile inhibited oxidation and pyritization of pyrrhotite. Biostratigraphic analysis, based on the palynological content of the hosting black shales, restricts the age of the sulfides to the Asbian substage (mid-Mississippian). This age is consistent with earlier geochronological constraints. © Springer-Verlag 2008.
Authors & Co-Authors
Moreno, C.
Spain, Huelva
Universidad de Huelva
Sáez, R.
Spain, Huelva
Universidad de Huelva
González, Felipe
Spain, Huelva
Universidad de Huelva
Almodóvar, G.
Spain, Huelva
Universidad de Huelva
Toscano, M.
Spain, Huelva
Universidad de Huelva
Playford, Geoffrey
Australia, Brisbane
The University of Queensland
Alansari, Abdelkhalek
Morocco, Marakech
Université Cadi Ayyad
Rziki, S.
Morocco, Marakech
Compagnie Minière Des Guemmassa Cmg/managem/ona
Bajddi, Amine
Morocco, Marakech
Compagnie Minière Des Guemmassa Cmg/managem/ona
Statistics
Citations: 36
Authors: 9
Affiliations: 4
Identifiers
Doi:
10.1007/s00126-008-0199-x
ISSN:
00264598
Research Areas
Environmental
Study Locations
Morocco