Advertisement

Rare Earth Element Signatures of the Bled M’Dena Porphyry Molybdenum-Copper System, Eglab Massif (SW, Algeria)

  • Karima LagraaEmail author
  • Stefano Salvi
  • Didier Béziat
Conference paper
Part of the Advances in Science, Technology & Innovation book series (ASTI)

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.

Keywords

REE geochemistry Mo-Cu porphyry Eglab Bled M’Dena Economic porphyry 

References

  1. 1.
    Goodenough, K.M., Schilling, J., Jonsson, E., Kalvig, P., Charles, N., Tuduri, J., Deady, E.A., Sadeghi, M., Schiellerup, H., Müller, A., Bertrand, G., Arvanitidis, N., Eliopoulos, D.G., Shaw, R.A., Thrane, K., Keulen, N.: Europe’s rare earth element resource potential: an overview of REE metallogenetic provinces and their geodynamic setting. Ore Geol. Rev. 72, 838–856 (2016)CrossRefGoogle Scholar
  2. 2.
    Lagraa, K., Salvi, S., Béziat, D., Debat, P., Kolli, O.: First insights on the molybdenum- copper Bled M’Dena complex (Eglab massif, Algeria). J. Afr. Earth Sc. 127, 159–174 (2017)CrossRefGoogle Scholar
  3. 3.
    Lottermoser, B.G.: Rare earth elements and hydrothermal ore formation. Ore Geol. Rev. 7, 25–41(1992)Google Scholar
  4. 4.
    Mahdjoub, Y., Kahoui, M.: The Paleoproterozoic Eglab domain (Algeria, Réguibat Rise, West African Craton); geodynamic model and ore controls; 1ère Conférence International en Algérie sur les Ressources Minérales (CIRMA) (Communication oral); Décembre 2007; Algérie (2007)Google Scholar
  5. 5.
    Richards, J.P., Kerrich, R.: Adakite-like rocks: their diverse origins and questionable role in metallogenesis. Econ. Geol. 102, 537–576 (2007)CrossRefGoogle Scholar
  6. 6.
    Verplancka, P.L.: The role of fluids in the formation of rare earth element deposits. Procedia Earth Planet. Sci. 17, 758–761 (2017)CrossRefGoogle Scholar
  7. 7.
    Zarasvandi, A., Rezaei, M., Sadeghi, M., Lentz, D., Adelpour, M., Pourkaseb, H.: Rare earth element signatures of economic and sub-economic porphyry copper systems in Urumieh-Dokhtar Magmatic Arc (UDMA), Iran. Ore Geol. Rev. 70, 407–423 (2015)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.University of Oran 2 Mohamed Ben AhmedOranAlgeria
  2. 2.University of Paul SabatierToulouseFrance

Personalised recommendations