Abstract
This work depicts the geochemical characteristics and distribution of the rare earth elements (REE) of the Bled M’Dena porphyry Mo-Cu complex which is located in the Eglab-Yetti Junction Zone (Reguibat Rise), SW Algeria. The whole-rock REE data exhibit LREE enrichment relative to HREE (Lagraa et al in J Afr Earth Sci 127:159–174, 2017 [2]), whereas the potential deposits reveal a downward pattern from LREE to HREE, suggesting a higher content of the former REE (Zarasvandi et al in Ore Geol Rev 70:407–423, 2015 [7]). The Eu anomalies are low (Eu/Eu* = 0.87–1.10) and also show relatively high La/Sm and Sm/Yb values, representing probably thickened crust and indicate the fractionation of amphibole with minor garnet. The geochemistry of the host rocks and the REE ore minerals indicate that the Mo-Cu Bled M’Dena porphyry presents similarities with other economic porphyries in the world.
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Lagraa, K., Salvi, S., Béziat, D. (2019). Rare Earth Element Signatures of the Bled M’Dena Porphyry Molybdenum-Copper System, Eglab Massif (SW, Algeria). In: Rossetti, F., et al. The Structural Geology Contribution to the Africa-Eurasia Geology: Basement and Reservoir Structure, Ore Mineralisation and Tectonic Modelling. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01455-1_13
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