Analysis of tectonic fracturing in the Mibladen ore deposit (Upper Moulouya, Morocco) and its impact on the Pb–Ba mineralization emplacement
The MVT Pb–Ba mineralizations of the Mibladen ore deposit are hosted by Jurassic carbonates as well as Infracenomanian conglomerates and sandstones. The mineral paragenesis is mainly composed of galena and barite with lesser chalcopyrite and pyrite, accompanied by supergene oxidation minerals. This...
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| creator | Yaagoub, Driss Hinaje, Saïd El Fartati, Mohamed Gharmane, Youssef |
| description | The MVT Pb–Ba mineralizations of the Mibladen ore deposit are hosted by Jurassic carbonates as well as Infracenomanian conglomerates and sandstones. The mineral paragenesis is mainly composed of galena and barite with lesser chalcopyrite and pyrite, accompanied by supergene oxidation minerals. This ore deposit is the result of a major epigenetic mineral stage with economic orebodies occuring as replacement of pre-existent carbonate rocks, fillings of karst cavities, interstratal joints, collapse-breccias, fractures, and faults. Structural and microtectonic analyses we carried out in this ore deposit, allowed us to highlight two main fracture networks controlling ore deposition within karst cavities and interstratal joints: (i) NNW-SSE to NNE-SSW trending tension gashes and normal faults; (ii) ENE-WSW to E-W trending reverse faults with strike-slip components and transtensive relay zones. All of these structures are developed under a regional compressional tectonic regime divided into extensional and transtensional episodes (σ1–σ2 and σ2–σ3 permutations) with sub-meridian σ1 axis and sub-equatorial σ3 axis. This compressive tectonic event caused the uplift of Mibladen area and favored the circulation of mineralizing fluids along the NE-SW and ENE-WSW major faults such as Aouli and Amourou Faults, during the Infracenomanian period (Upper Jurassic–Early Cretaceous). |
| doi_str_mv | 10.1007/s12210-021-00995-1 |
| format | Article |
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The mineral paragenesis is mainly composed of galena and barite with lesser chalcopyrite and pyrite, accompanied by supergene oxidation minerals. This ore deposit is the result of a major epigenetic mineral stage with economic orebodies occuring as replacement of pre-existent carbonate rocks, fillings of karst cavities, interstratal joints, collapse-breccias, fractures, and faults. Structural and microtectonic analyses we carried out in this ore deposit, allowed us to highlight two main fracture networks controlling ore deposition within karst cavities and interstratal joints: (i) NNW-SSE to NNE-SSW trending tension gashes and normal faults; (ii) ENE-WSW to E-W trending reverse faults with strike-slip components and transtensive relay zones. All of these structures are developed under a regional compressional tectonic regime divided into extensional and transtensional episodes (σ1–σ2 and σ2–σ3 permutations) with sub-meridian σ1 axis and sub-equatorial σ3 axis. This compressive tectonic event caused the uplift of Mibladen area and favored the circulation of mineralizing fluids along the NE-SW and ENE-WSW major faults such as Aouli and Amourou Faults, during the Infracenomanian period (Upper Jurassic–Early Cretaceous).</description><identifier>ISSN: 2037-4631</identifier><identifier>EISSN: 1720-0776</identifier><identifier>DOI: 10.1007/s12210-021-00995-1</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Barite ; Barium ; Biomedicine ; Carbonate rocks ; Carbonates ; Cavities ; Chalcopyrite ; Conglomerates ; Cretaceous ; Earth and Environmental Science ; Earth Sciences ; Environment ; Epigenetics ; Fault lines ; Fractures ; Galena ; Geological faults ; History of Science ; Jurassic ; Karst ; Lead ; Life Sciences ; Mineral deposits ; Mineralization ; Oxidation ; Permutations ; Pyrite ; Regional development ; Research Paper ; Sandstone ; Tectonics</subject><ispartof>Atti della Accademia nazionale dei Lincei. 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Rendiconti Lincei. Scienze fisiche e naturali</title><addtitle>Rend. Fis. Acc. Lincei</addtitle><description>The MVT Pb–Ba mineralizations of the Mibladen ore deposit are hosted by Jurassic carbonates as well as Infracenomanian conglomerates and sandstones. The mineral paragenesis is mainly composed of galena and barite with lesser chalcopyrite and pyrite, accompanied by supergene oxidation minerals. This ore deposit is the result of a major epigenetic mineral stage with economic orebodies occuring as replacement of pre-existent carbonate rocks, fillings of karst cavities, interstratal joints, collapse-breccias, fractures, and faults. Structural and microtectonic analyses we carried out in this ore deposit, allowed us to highlight two main fracture networks controlling ore deposition within karst cavities and interstratal joints: (i) NNW-SSE to NNE-SSW trending tension gashes and normal faults; (ii) ENE-WSW to E-W trending reverse faults with strike-slip components and transtensive relay zones. All of these structures are developed under a regional compressional tectonic regime divided into extensional and transtensional episodes (σ1–σ2 and σ2–σ3 permutations) with sub-meridian σ1 axis and sub-equatorial σ3 axis. 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This compressive tectonic event caused the uplift of Mibladen area and favored the circulation of mineralizing fluids along the NE-SW and ENE-WSW major faults such as Aouli and Amourou Faults, during the Infracenomanian period (Upper Jurassic–Early Cretaceous).</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s12210-021-00995-1</doi><tpages>18</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Barite Barium Biomedicine Carbonate rocks Carbonates Cavities Chalcopyrite Conglomerates Cretaceous Earth and Environmental Science Earth Sciences Environment Epigenetics Fault lines Fractures Galena Geological faults History of Science Jurassic Karst Lead Life Sciences Mineral deposits Mineralization Oxidation Permutations Pyrite Regional development Research Paper Sandstone Tectonics |
| title | Analysis of tectonic fracturing in the Mibladen ore deposit (Upper Moulouya, Morocco) and its impact on the Pb–Ba mineralization emplacement |
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