Pb-Zn (Ba) deposits of the oriental Saharan Atlas (north-east of Algeria): distribution, control and implications for mi
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ORIGINAL PAPER
Pb-Zn (Ba) deposits of the oriental Saharan Atlas (north-east of Algeria): distribution, control and implications for mining exploration Haddouche Omar 1 & Boutaleb Abdelhak 2 & Chamam Madjid 3 & Ysbaa Saadia 4 & Hammouche Hanafi 5 & Boubaya Djamel 6
Received: 11 June 2015 / Accepted: 26 February 2016 # Saudi Society for Geosciences 2016
Abstract Analysis and integration of geological/ metallogenic data and digitally processed gravimetric/ aeromagnetic data to the oriental Saharan Atlas domain were carried out to understand the spatial distribution and structural control on Pb-Zn (Ba) deposits of the oriental Saharan Atlas. The use of this combined technique suggests that most of mineral deposits appear to be regionally controlled by structural trends (subparallel NE-SW-trending) along margins of subsiding sedimentary basins. Mineralization occurs along or near major NE-SW-trending faults, locally intersected by NW-SE-trending faults. In addition, mineral deposits are usually either inside anticlinal hinge zones (example, Merouana, Ichmoul and Ain Mimoum ore deposits) or on the flanks of anticlinal structures (example, Ain Bougda ore deposit). In Bdiapiric zone^, mineral deposits are generally located on diapiric structures borders (peridiapiric concentrations), related to NE-SW/NE-SW and E-W-trending faults. Other mineral concentrations occurs along the margins of tectonic troughs zones (example, Morsott trough) resulting probably by NWSE-trending deep faults movement. In summary, our research
* Boutaleb Abdelhak [email protected] Haddouche Omar [email protected] Chamam Madjid [email protected]
suggested that regional parameters, such as NE-SW/NW-SEtrending lineaments, intersections of these lineament zones and margins of subsiding sedimentary basins/diapiric structures, serve as significant indicators and provides a valuable framework for guiding the early stages of Pb-Zn (Ba) mineral exploration; other considerations must then be applied in this region, like integration of surficial geochemical anomalies that allows better delineation of targets for further mineral exploration. Keywords Oriental Saharan Atlas . Mineral deposits . Mineralization . Tectonic . Geophysical . Exploration
Introduction The oriental Saharan Atlas in north-east of Algeria is a wellknown mineral district of base metals (lead, zinc) and barite, locally associated with copper, mercury, fluorite, siderite and iron oxides (Fig. 1). These mineral deposits are closely
1
Laval, Canada
2
USTHB, Bab Ezzouar, Algeria
3
Abitibi Géophysique inc., Val-d’Or, Canada
4
Laboratoire des ressources minérales et énergétiques - FHC – UMMB, Boumerdes, Algeria
5
Bureau de la connaissance géoscientifique du Québec (BCGQ), Quebec, Canada
6
Faculté des Sciences Exactes et des Sciences de la Nature et de la Vie, Université de Tébessa, Tébessa, Algeria
Ysbaa Saadia [email protected] Hammouche Hanafi [email protected] Boubaya Djamel [email protected]
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Arab J Geosci2 4:9 )6102(
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