| Reference Type | Journal (article/letter/editorial) |
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| Title | Post-Collisional Mantle Processes and Magma Evolution of the El Bola Mafic–Ultramafic Intrusion, Arabian-Nubian Shield, Egypt |
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| Journal | Minerals |
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| Authors | Abdelfadil, Khaled M. | Author |
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| Semary, Hatem E. | Author |
| Asran, Asran M. | Author |
| Rehman, Hafiz U. | Author |
| Sami, Mabrouk | Author |
| Aldukeel, A. | Author |
| Mogahed, Moustafa M. | Author |
| Year | 2025 | Volume | < 15 > |
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| Issue | < 7 > |
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| URL | |
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| DOI | doi:10.3390/min15070705Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18627044 | Long-form Identifier | mindat:1:5:18627044:4 |
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| GUID | 0 |
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| Full Reference | Abdelfadil, Khaled M.; Semary, Hatem E.; Asran, Asran M.; Rehman, Hafiz U.; Sami, Mabrouk; Aldukeel, A.; Mogahed, Moustafa M. (2025) Post-Collisional Mantle Processes and Magma Evolution of the El Bola Mafic–Ultramafic Intrusion, Arabian-Nubian Shield, Egypt. Minerals, 15 (7). doi:10.3390/min15070705 |
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| Plain Text | Abdelfadil, Khaled M.; Semary, Hatem E.; Asran, Asran M.; Rehman, Hafiz U.; Sami, Mabrouk; Aldukeel, A.; Mogahed, Moustafa M. (2025) Post-Collisional Mantle Processes and Magma Evolution of the El Bola Mafic–Ultramafic Intrusion, Arabian-Nubian Shield, Egypt. Minerals, 15 (7). doi:10.3390/min15070705 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The El Bola mafic–ultramafic intrusion (EBMU) in Egypt’s Northern Eastern Desert represents an example of Neoproterozoic post-collisional layered mafic–ultramafic magmatism in the Arabian–Nubian Shield (ANS). The intrusion is composed of pyroxenite, olivine gabbro, pyroxene gabbro, pyroxene–hornblende gabbro, and hornblende-gabbro, exhibiting adcumulate to heter-adcumulate textures. Mineralogical and geochemical analyses reveal a coherent trend of fractional crystallization. Compositions of whole rock and minerals indicate a parental magma of ferropicritic affinity, derived from partial melting of a hydrous, metasomatized spinel-bearing mantle source, likely modified by subduction-related fluids. Geothermobarometric calculations yield crystallization temperatures from 1120 °C to 800 °C and pressures from 5.2 to 3.1 kbar, while oxygen fugacity estimates suggest progressive oxidation (log fO2 from −17.3 to −15.7) during differentiation. The EBMU displays Light Rare Earth element (LREE) enrichment, trace element patterns marked by Large Ion Lithophile Element (LILE) enrichment, Nb-Ta depletion and high LILE/HFSE (High Field Strength Elements) ratios, suggesting a mantle-derived source that remained largely unaffected by crustal contribution and was metasomatized by slab-derived fluids. Tectonic discrimination modeling suggests that EBMU magmatism was triggered by asthenospheric upwelling and slab break-off. Considering these findings alongside regional geologic features, we propose that the mafic–ultramafic intrusion from the ANS originated in a tectonic transition between subduction and collision (slab break-off) following the assembly of Gondwana. |
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