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<p>The Tansrift mine is a copper mine, located within the MVT metallogenic province of the High Central Atlas. The Tansrift deposit is characterized by copper mineralization hosted within Bathonian–Barremian red beds. This study employed an integrated field and laboratory methodology to investigate the Tansrift mineralization. Fieldwork comprised detailed geological mapping of host rocks and mineralized structures, coupled with macroscopic mineralization analysis. Selective sampling was conducted across the mineralized zone to capture spatial variations. Laboratory investigations included a multi-analytical approach utilizing petrographic, mineralogical, and geochemical techniques to characterize ore phases and establish the deposit's genetic model. Structural analysis of the mineralized structure indicates that mineralization was emplaced under a transpressional regime and subsequently exposed by thrust faulting under an N–S compressional regime petrographic, mineralogical, and geochemical analyses of the mineralized structure reveal significant copper and iron enrichment, expressed through primary copper sulfides and their weathering products, reflecting successive stages of hypogene to supergene mineralization under evolving physicochemical conditions. Multi-analytical results reveal copper mineralization at Tansrift develops through four sequential stages: (i) primary mineralization initiates through chloride-rich hydrothermal leaching of B1 basalts, forming copper complexes that migrate along fractures; (ii) bacterial sulfate reduction of evaporites generates reduced sulfur species with CO and H₂O byproducts; (iii) fault-controlled mixing of deep brines and sulfur-rich fluids precipitates in Bathonian–Barremian arenaceous sandstones; and (iv) supergene remobilization during later tectonism forms malachite-hematite assemblages, fibrous precipitates, and microconglomerate lenses.</p>

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Integrated geological–geochemical model for copper mineralization in the Tansrift deposit (Beni Mellal Atlas, Morocco)

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Youssef Ouahzizi,
  • Mohammed Charroud,
  • Mohammed Laiche,
  • Driss El Azzab,
  • Abdelkhiar Ait Ali

摘要

The Tansrift mine is a copper mine, located within the MVT metallogenic province of the High Central Atlas. The Tansrift deposit is characterized by copper mineralization hosted within Bathonian–Barremian red beds. This study employed an integrated field and laboratory methodology to investigate the Tansrift mineralization. Fieldwork comprised detailed geological mapping of host rocks and mineralized structures, coupled with macroscopic mineralization analysis. Selective sampling was conducted across the mineralized zone to capture spatial variations. Laboratory investigations included a multi-analytical approach utilizing petrographic, mineralogical, and geochemical techniques to characterize ore phases and establish the deposit's genetic model. Structural analysis of the mineralized structure indicates that mineralization was emplaced under a transpressional regime and subsequently exposed by thrust faulting under an N–S compressional regime petrographic, mineralogical, and geochemical analyses of the mineralized structure reveal significant copper and iron enrichment, expressed through primary copper sulfides and their weathering products, reflecting successive stages of hypogene to supergene mineralization under evolving physicochemical conditions. Multi-analytical results reveal copper mineralization at Tansrift develops through four sequential stages: (i) primary mineralization initiates through chloride-rich hydrothermal leaching of B1 basalts, forming copper complexes that migrate along fractures; (ii) bacterial sulfate reduction of evaporites generates reduced sulfur species with CO and H₂O byproducts; (iii) fault-controlled mixing of deep brines and sulfur-rich fluids precipitates in Bathonian–Barremian arenaceous sandstones; and (iv) supergene remobilization during later tectonism forms malachite-hematite assemblages, fibrous precipitates, and microconglomerate lenses.