Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases
The Moroccan Anti-Atlas hosts numerous precious metal (Au, Ag, Co, PGE...) and base metal (Cu, Pb, Zn...) mineralizations that are developed in various geological and geodynamic contexts. Some of these mineralizations, such as copper and nickel, are known in the form of deposits at the scale of the...
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Elsevier
2023-09-01
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| Series: | Scientific African |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468227623002235 |
| _version_ | 1797676232257568768 |
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| author | Abdel-Ali Kharis Said Ilmen Mohamed Aissa Bouchra Baidada Azizi Moussaid Hafid Mezougane Ahmed Fadili Hicheme Houane Sghir Syad Lhou Maacha |
| author_facet | Abdel-Ali Kharis Said Ilmen Mohamed Aissa Bouchra Baidada Azizi Moussaid Hafid Mezougane Ahmed Fadili Hicheme Houane Sghir Syad Lhou Maacha |
| author_sort | Abdel-Ali Kharis |
| collection | DOAJ |
| description | The Moroccan Anti-Atlas hosts numerous precious metal (Au, Ag, Co, PGE...) and base metal (Cu, Pb, Zn...) mineralizations that are developed in various geological and geodynamic contexts. Some of these mineralizations, such as copper and nickel, are known in the form of deposits at the scale of the Anti-Atlas and are the subject of mining development and exploitation. This is the case of the Bounhas deposit, which is located in the southern part of the Eastern Anti-Atlas, 50 km SE of the city of Alnif. It is characterized by Cu, Ni, Pb and Zn mineralizations, which are essentially hosted in sedimentary terrains of a sandstone-pelitic nature of the upper formation of the second Bani group (Upper Ordovician). These terrains are affected by brittle deformations that have developed faults that host the lenticular vein mineralization in an E-W direction. The arrangement and textural relationships between the mineral phases of the Bounhas deposit have allowed to distinguish two distinct mineralizing events: (i) a primary hydrothermal event subdivided into 3 metalliferous episodes the first, with Fe, characterized essentially by pyrite mineralization in a carbonate gangue (ankerite and siderite); the second with Cu, Ni, As ± Zn ± Pb, precipitates most of the arsenopyrite, sphalerite I, galena I, gersdorffite and chalcopyrite mineralization in a quartz gangue; and the third, with Pb, Zn, and Ba, places galena II and sphalerite II in a barytic gangue. A late supergene alteration event, characterized by the appearance of minerals typical of cementation, sulfation, carbonation and oxidation zones (covellite, native copper, anglesite, malachite, azurite and iron oxides). Moreover, the study of the fluid inclusions associated with the Cu, Ni, As ± Pb ± Zn mineralization from the Bounhas deposit reveals the presence of two types of fluids: (i) a hypersaline fluid, characterized by a salinity varying between 25 and 30 wt% NaCl eq and a homogenization temperature: Th = 200 to 240 °C. This fluid would be responsible for the development of the copper-nickel-arsenic mineralization of this deposit and (ii) a late medium saline fluid (12 to 15 wt% NaCl eq) and a homogenization temperature Th = 80 °C to 120 °C, to which would be attributed the development of the Pb and Zn mineralization of this deposit. |
| first_indexed | 2024-03-11T22:25:59Z |
| format | Article |
| id | doaj.art-8c225235d1ce4e39ac6acd99306a174d |
| institution | Directory Open Access Journal |
| issn | 2468-2276 |
| language | English |
| last_indexed | 2024-03-11T22:25:59Z |
| publishDate | 2023-09-01 |
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| series | Scientific African |
| spelling | doaj.art-8c225235d1ce4e39ac6acd99306a174d2023-09-24T05:15:59ZengElsevierScientific African2468-22762023-09-0121e01767Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phasesAbdel-Ali Kharis0Said Ilmen1Mohamed Aissa2Bouchra Baidada3Azizi Moussaid4Hafid Mezougane5Ahmed Fadili6Hicheme Houane7Sghir Syad8Lhou Maacha9CAG2M, Polydisciplinary Faculty of Ouarzazate, Ibnou Zohr University, Avenue Moulay Ettahar Ben Abdulkarim, BP. 638, Ouarzazate 45000, MoroccoCAG2M, Polydisciplinary Faculty of Ouarzazate, Ibnou Zohr University, Avenue Moulay Ettahar Ben Abdulkarim, BP. 638, Ouarzazate 45000, Morocco; Corresponding author.Department of Geology, Faculty of Sciences, Moulay Ismail University, BP 11201 Zitoune, Meknès, MoroccoEcole Supérieure de Technologie, Moulay Slimane University, Fkih Bensalah, MoroccoDepartment of Geology, Faculty of Sciences, Moulay Ismail University, BP 11201 Zitoune, Meknès, MoroccoFaculty of Sciences and Techniques, Hassan First University, Settat, MoroccoPolydisciplinary Faculty of Ouarzazate, Ibnou Zohr University, Avenue Moulay Ettahar Ben Abdulkarim, BP. 638, Ouarzazate 45000, MoroccoManagem Group, Twin Center, Casablanca, MoroccoManagem Group, Twin Center, Casablanca, MoroccoManagem Group, Twin Center, Casablanca, MoroccoThe Moroccan Anti-Atlas hosts numerous precious metal (Au, Ag, Co, PGE...) and base metal (Cu, Pb, Zn...) mineralizations that are developed in various geological and geodynamic contexts. Some of these mineralizations, such as copper and nickel, are known in the form of deposits at the scale of the Anti-Atlas and are the subject of mining development and exploitation. This is the case of the Bounhas deposit, which is located in the southern part of the Eastern Anti-Atlas, 50 km SE of the city of Alnif. It is characterized by Cu, Ni, Pb and Zn mineralizations, which are essentially hosted in sedimentary terrains of a sandstone-pelitic nature of the upper formation of the second Bani group (Upper Ordovician). These terrains are affected by brittle deformations that have developed faults that host the lenticular vein mineralization in an E-W direction. The arrangement and textural relationships between the mineral phases of the Bounhas deposit have allowed to distinguish two distinct mineralizing events: (i) a primary hydrothermal event subdivided into 3 metalliferous episodes the first, with Fe, characterized essentially by pyrite mineralization in a carbonate gangue (ankerite and siderite); the second with Cu, Ni, As ± Zn ± Pb, precipitates most of the arsenopyrite, sphalerite I, galena I, gersdorffite and chalcopyrite mineralization in a quartz gangue; and the third, with Pb, Zn, and Ba, places galena II and sphalerite II in a barytic gangue. A late supergene alteration event, characterized by the appearance of minerals typical of cementation, sulfation, carbonation and oxidation zones (covellite, native copper, anglesite, malachite, azurite and iron oxides). Moreover, the study of the fluid inclusions associated with the Cu, Ni, As ± Pb ± Zn mineralization from the Bounhas deposit reveals the presence of two types of fluids: (i) a hypersaline fluid, characterized by a salinity varying between 25 and 30 wt% NaCl eq and a homogenization temperature: Th = 200 to 240 °C. This fluid would be responsible for the development of the copper-nickel-arsenic mineralization of this deposit and (ii) a late medium saline fluid (12 to 15 wt% NaCl eq) and a homogenization temperature Th = 80 °C to 120 °C, to which would be attributed the development of the Pb and Zn mineralization of this deposit.http://www.sciencedirect.com/science/article/pii/S2468227623002235CAMPEastern Anti-AtlasBounhasCu-Ni veinHydrothermalFluid inclusions |
| spellingShingle | Abdel-Ali Kharis Said Ilmen Mohamed Aissa Bouchra Baidada Azizi Moussaid Hafid Mezougane Ahmed Fadili Hicheme Houane Sghir Syad Lhou Maacha Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases Scientific African CAMP Eastern Anti-Atlas Bounhas Cu-Ni vein Hydrothermal Fluid inclusions |
| title | Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases |
| title_full | Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases |
| title_fullStr | Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases |
| title_full_unstemmed | Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases |
| title_short | Metallogenesis of the Cu-Ni sulfide type mineralization in the Bounhas vein deposit (Eastern Anti-Atlas, Morocco): Insights from ore mineral paragenesis and fluid phases |
| title_sort | metallogenesis of the cu ni sulfide type mineralization in the bounhas vein deposit eastern anti atlas morocco insights from ore mineral paragenesis and fluid phases |
| topic | CAMP Eastern Anti-Atlas Bounhas Cu-Ni vein Hydrothermal Fluid inclusions |
| url | http://www.sciencedirect.com/science/article/pii/S2468227623002235 |
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