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Geology, mineralogy and mineral chemistry of the NYF-type pegmatites at the Gabal El Faliq area, South Eastern Desert, Egypt

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Abstract

The Gabal El Faliq area is located in the Eastern Desert of Egypt and belongs to the Wadi Hafafit–Wadi Ghadir fold belt. Lenses and dykes of rare metal-bearing pegmatites occur along major weak zones in the area (Wadi El Gemal strike-slip and its Riedel shears), by which they are structurally controlled. These pegmatites are mineralogically complex. Moreover, they are zoned, and the intermediate zones of the pegmatite varieties contain high amounts of zircon, fergusonite-(Y), columbite-(Fe), allanite-(Ce), xenotime-(Y), monazite-(Ce and Nd), thorite and gummite. These minerals carry Zr, rare earth element (REE), Nb, Ta, Th, U >Ta, F, and they are classified into rare-metal pegmatites, specifically, the niobium, yttrium and fluorine (NYF) enrichment family. The geochemistry aspects of these pegmatites indicate Zr up to 28,984 ppm, Hf up to 1171 ppm, REE up to 19,206 ppm, Nb up to 9962 ppm, Ta up to 152 ppm, U up to 565.5 ppm, Th up to 850 ppm and Ga up to 90 ppm. They were formed under an intracontinental tectonic setting from a basaltic magma similar to the oceanic island basalts (OIBs) contaminated with the crust. Consequently, this study could be used as a guide for the exploration of rare metals in similar regions of the world.

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References

  • Abd El-Naby H H and Frisch W 2006 Geochemical constraints from the Hafafit Metamorphic Complex (HMC): Evidence of Neoproterozoic back-arc basin development in the central Eastern Desert of Egypt; J. Afr. Earth Sci. 45 173–186.

    Article  Google Scholar 

  • Abdelsalam M G and Stern R J 1996 Sutures and shear zones in the Arabian Nubian shield; J. Afr. Earth Sci. 31 289–310.

    Article  Google Scholar 

  • Abu Elatta S A 2018 The rare metal deposits of the El Garra Hamra syenites, South Western Desert, Egypt; Ore Geol. Rev. 101 609–628.

    Article  Google Scholar 

  • Abu Elatta S A, Assran H M and Ahmed A A 2013 Preliminary study on HFSE mineralization in the peralkaline granites of Nusab El Balgum Area, South Western Desert, Egypt; Geomaterials 3 90–101.

    Article  Google Scholar 

  • Ali M A, Lentz D I and Hall D C 2011 Mineralogy and geochemistry of Nb-, Ta-, Sn-, U-, Th-, and Zr-bearing granitic rocks from Abu Rusheid Shear Zones, South Eastern Desert, Egypt; Chin. J. Geochem. 30 226–247.

    Article  Google Scholar 

  • Attawiya M Y, Zalata A A, Ibrahim M E, Mostafa M E and Dawood N A 2000 Geology, geochemistry, and mineralogy of uraniferous pegmatites at Gabal Abu Dob, central Eastern Desert, Egypt; In: Fifth Arab conference on the peaceful uses of Atomic Energy, Beirut, pp. 26–45.

  • Bagiński B, Jokubauskas P, Domanska J, Kartashow P and Macdonald R 2016 Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals; Acta Geol. Pol. 66(3) 473–491.

    Google Scholar 

  • Baker D R and Vaillancourt J 1995 The low viscosities of F + \(\text{ H }_{2}\)O-bearing granitic melts and implications for melt extraction and transport; Earth Planet. Sci. Lett. 132 199–211.

    Article  Google Scholar 

  • Bau M 1996 Controls on the fractionation of isovalent trace elements in magmatic and aqueous systems; evidence from Y/Ho, Zr/Hf, and lanthanide tetrad effect; Contrib. Mineral. Petrol. 123 323–333.

    Article  Google Scholar 

  • Bau M and Dulski P 1999 Comparing yttrium and rare earth in hydrothermal fluids from the Mid-Atlantic Ridge: Implications for Y and REE behavior during near-vent mixing and for the Y/Ho ratio of Proterozoic Sea water; Chem. Geol. 155 77–90.

    Article  Google Scholar 

  • Beus A A 1982 Metallogeny of Precambrian rare-metal granitoids; Rev. Braz. Geos. 12 410–413.

    Google Scholar 

  • Black R, Lameyre J and Bonin B 1985 The structural setting of alkaline complexes; J. Afr. Earth Sci. 3 5–16.

    Google Scholar 

  • Blasband B, White S, Brooijmans P, De Boorder H and Visser W 2000 The Late Proterozoic extensional collapse in the Arabian–Nubian shield; J. Geol. Soc., London 157 615–628.

    Article  Google Scholar 

  • Boynton W V 1984 Geochemistry of the rare earth elements: Meteorite studies; In: Rare Earth Element Geochemistry (ed.) Henderson P, Elsevier, pp. 63–114.

  • Černý P 1991 Rare-element granitic pegmatites. Part 1: Anatomy and internal evolution of pegmatite deposits. Part 2: Regional to global environments and petrogenesis; Geosci. Can. 18 49–81.

    Google Scholar 

  • Černý P and Ercit T S 2005 The classification of granitic pegmatites revisited; Can. Mineral. 43 2005–2026.

    Article  Google Scholar 

  • Collins W J, Beams S D, White A J R and Chappell B 1982 Nature and origin of A-type granites with particular reference to Southeastern Australia; Contrib. Mineral. Petrol. 80 189–200.

    Article  Google Scholar 

  • Dingwell D B, Hess K U and Knoche R 1996 Granite and granitic pegmatite melt: Volumes and viscosities; Trans. Roy. Soc. Edinburgh, J. Earth Sci. 87 65–72.

    Article  Google Scholar 

  • Eby G N 1990 The A-type granitoids. A review of their occurrence and chemical characteristics and speculations on their petrogenesis; Lithos 26 115–134.

    Article  Google Scholar 

  • Eby G N 1992 Chemical subdivision of the A-type granitoids: Petrogenetic and tectonic implications; Geology 20 641–644.

    Article  Google Scholar 

  • El-Ramly M F and Hussein A A 1982 The Alkaline Ring Complexes of Egypt; Geological Survey of Egypt, Paper No. 63, 16p.

  • El-Ramly M F, Greiling R, Kroner A and Rashwan A A 1984 On the tectonic evolution of the Wadi Hafafit area and environs, Eastern Desert of Egypt; Faculty of Earth Science, King Abdulaziz University Bulletin 6 113–126.

    Google Scholar 

  • El-Ramly M F, Greiling R, Rashwan A A and Rasmy A H 1993 Explanatory Note to Accompany the Geological and Structural Maps of Wadi Hafafit Area, Eastern Desert of Egypt; Geological Survey of Egypt, Paper No. 68.

  • El-Sayed M M 2003 The Neoproterozoic Dubr intrusives, Central Eastern Desert, Egypt: Petrological and geochemical constraints on the evolution of a mafic-felsic suite; Mineral. Geochem. 179 1–42.

    Google Scholar 

  • El Sayed A M, Assran H M and Abu Elatta S A 2014 Petrographic, radiometric and paleomagnetic studies for some alkaline rocks, South Musab El Balgum Mass Complex, South Western Desert, Egypt; Geomaterials 4 27–46.

    Article  Google Scholar 

  • Erlank A J, Smith H S, Marchant J W, Cardoso M P and Ahrens L H 1978 Hafnium; In: Handbook of geochemistry (ed.) Wedepohl K H, Springer-Verlag, Berlin, Heidelberg, New York, pp. 72C1–72O1.

  • Fritz H, Dallmeyer R D, Wallbrecher E, Loizenbauer J, Hoinkes G, Neumayr P and Khudeir A A 2002 Neoproterozoic tectonothermal evolution of the central Eastern Desert of Egypt: A slow velocity tectonic process of core complex exhumation; J. Afr. Earth Sci. 34 137–155.

    Article  Google Scholar 

  • Garson M S and Kris M 1976 Geophysical and geological evidence of the relationship of Red Sea transverse tectonics to ancient fractures; Geol. Soc. Am. Bull. 87 169–181.

    Article  Google Scholar 

  • Green T H and Pearson N J 1986 An experimental study of Nb and Ta partitioning between Ti-rich minerals and silicate fluids at high temperature and pressure; Geochim. Cosmochim. Acta 51 103–111.

    Google Scholar 

  • Grothaus B D, Eppler D and Ehrlich R 1979 Depositional environment and structural implications of the Hammamat Formation, Egypt; Ann. Geol. Surv. Egypt 9 564–590.

    Google Scholar 

  • Harris N B W, Pearce J A and Tindle A G 1986 Geochemical characteristics of collision-zone magmatism; In: Collision Tectonics (eds) Coward M P and Ries A C, J. Geol. Soc. London, Spec. Publ. 19 67–81.

  • Hashad A H and El Reedy M W M 1979 Geochronology of anorogenic alkalic rocks. Southeastern Desert, Egypt; Ann. Geol. Surv. Egypt 9 81–101.

    Google Scholar 

  • Hassan M A and Hashad A H 1990 Precambrian of Egypt; In: The Geology of Egypt (ed.) Said R, A. A. Balkema Rotterdam, Netherlands, pp. 201–245.

    Chapter  Google Scholar 

  • Henderson P 1982 Inorganic Geochemistry; Pergamon, Oxford, 312p.

    Google Scholar 

  • Kogarko L N, Williams C T and Woolley A R 2002 Chemical evolution and petrogenetic implications of loparite in the layered, agpaitic Lovozero complex, Kola Peninsula, Russia; Mineral. Petrol. 74 1–24.

    Article  Google Scholar 

  • Kroner A, Kruger J and Rashwan A A 1994 Age and tectonic setting of granitoid gneisses in the Eastern Desert of Egypt and south-west Sinai; Geol. Rundsch. 83 502–513.

    Article  Google Scholar 

  • Lameyre J, Black R, Bonin B and Giret A 1984 Les provinces mamatiques de l’Est American, de I’Quest African et des Kerguelen. Indications d’un controle tectonique et d’une initiagtion superficielle du magmatism intraplaque et des processus associes; Ann. Soc. Géol. d’Nord C3(45) 101–114.

    Google Scholar 

  • Linnen R L 1998 The solubility of Nb–Ta–Zr–Hf–W in granitic melts with Li and Li-F: Constraints for mineralization in rare-metal granites and pegmatites; Econ. Geol. 93 1013–1025.

    Article  Google Scholar 

  • Loizenbauer L, Wallbrecher E, Fritz H, Neumayr P, Khudeir A A and Kloetzli U 2001 Structural geology, single zircon ages and fluid inclusion studies of the Meatiq metamorphic core complex: Implications for neoproterozoic tectonics in the Eastern Desert of Egypt; Precamb. Res. 110 357–383.

    Article  Google Scholar 

  • London D 1997 Estimating abundances of volatile and other mobile components in evolved silicic melts through mineral–melt equilibria; J. Petrol. 38 1691–1706.

    Article  Google Scholar 

  • London D 2008 The Canadian Mineralogist; Spec. Publ., Vol. 10, 347p.

  • London D 2009 The origin of primary textures in granitic pegmatites; Can. Mineral. 47 697–724.

    Article  Google Scholar 

  • Martin R F and De Vito C 2005 The patterns of enrichment in felsic pegmatites ultimately depend on the tectonic setting; Can. Mineral. 43 2027–2048.

    Article  Google Scholar 

  • Mbowou G I B, Lagmet C, Nomade S, Ngounouno I, Deruelle B and Ohnenstetter D 2012 Petrology of the late cretaceous peralkaline rhyolites (pantellerite and comendite) from Lake Chad, Central Africa; J. Geosci. 57 127–141.

    Article  Google Scholar 

  • McDonough W F and Sun S S 1995 The composition of the earth; Chem. Geol. 120 223–253.

    Article  Google Scholar 

  • Migdisov A A and Williams-Jones A E 2002 A spectro-photometric study of neodymium (III) complexation in chloride solutions; Geochim. Cosmochim. Acta 66 4311–4323.

    Article  Google Scholar 

  • Migdisov A A and Williams-Jones A E 2007 An experimental study of the solubility and speciation of neodymium (III) fluoride in F-bearing aqueous solutions; Geochim. Cosmochim. Acta 71 3056–3069.

    Article  Google Scholar 

  • Migdisov A A, Williams-Jones A E and Wagner T 2009 An experimental study of the solubility and speciation of the rare earth elements (III) in fluoride- and chloride-bearing aqueous solutions at temperatures up to 300 degrees C; Geochim. Cosmochim. Acta 73 7087–7109.

    Article  Google Scholar 

  • Moghazi A M, Hassanein M A, Mohamed F H and Ali S 2004 Late neoproterozoic strongly peraluminous leucogranites, south Eastern Desert, Egypt-petrogenesis and geodynamic significance; Mineral. Petrol. 81 19–41.

    Article  Google Scholar 

  • Omar S A 1995 Geology and geochemical features of the radioactive occurrences of Um-Anab granitic masses, Eastern Desert, Egypt; MSc Thesis, Cairo University, 195p.

  • Raslan M F 2008 The occurrence of ishikawaite (uranium-rich samarskite) in the mineralized Abu Rashied Gneiss, Southeastern Desert of Egypt; Int. Geol. Rev. 50(12) 1132–1140.

    Article  Google Scholar 

  • Rice A H N, Sadek M F and Rashwan A A 1993 Igneous and structural relations in the Pan-African Hammamat Group, Igla Basin, Egypt. Geoscientific research in Northeast Africa; In: Proceedings of the international conference on geoscientific research in Northeast Africa (eds) Thorwcihe U and Schan-delmeier H, Balkema, Rotterdam, pp. 35–39.

    Chapter  Google Scholar 

  • Ries A C, Shackelton R M, Graham R H and Fitches W R 1983 Pan-African structures, ophiolites, and melange in the Eastern Desert of Egypt: A traverse at 26N; J. Geol. Soc. London 140 75–95.

    Article  Google Scholar 

  • Sabet T H and Tsogoev V B 1973 Problems of geological and economic evaluation of tantalum deposits in apogranites during stages of prospection and exploration; Ann. Geol. Surv. Egypt 3 87–107.

    Google Scholar 

  • Saleh G M, Doaa A M, Darwish M and Salem I A 2014 Gabal El Faliq Granitoid rocks of the Southeastern Desert, Egypt: Geochemical constraints, mineralization and spectrometric prospecting; Standard Global J. Geol. Expl. Res. 1(1) 9–26.

    Google Scholar 

  • Salvi S and Williams-Jones A E 2004 Alkaline granite-syenite deposits; In: Rare-element geochemistry and mineral deposits (eds) Linnen R L and Samson I M, Geol. Assoc. Can. Short Course Notes 17 315–341.

  • Scarrow J H, Bea F, Montero P and Molina J F 2009 Shoshonites, vaugnerites, and potassic lamprophyres: Similarities and differences between ‘ultra’ high-K rocks. Earth and environmental science; Trans. Roy. Soc. Edinburgh 99 159–175.

    Google Scholar 

  • Serencits C M C, Faul H, Foland K A, El-Ramly M C and Hussein A A 1979 Alkaline ring complexes in Egypt: Their ages and relationship to tectonic development of the Red Sea; Ann. Geol. Surv. Egypt 9 102–116.

    Google Scholar 

  • Stern R J and Hedge C E 1985 Geochronologic and isotopic constraints on late Precambrian crustal evolution in the Eastern Desert of Egypt; Am. J. Sci. 285 97–127.

    Article  Google Scholar 

  • Taylor S R and McClennan S M 1985 The continental crust: Its composition and evolution; Black well Scientific Publications, Oxford, UK, 312p.

    Google Scholar 

  • Timofeev A, Migdisov A A and Williams-Jones A E 2017 An experimental study of the solubility and speciation of tantalum in fluoride-bearing aqueous solutions at elevated temperature; Geochim. Cosmochim. Acta 197 294–304.

    Article  Google Scholar 

  • Vail J R 1989 Ring complexes and related rocks in Africa; J. Afr. Earth Sci. 8 19–40.

    Article  Google Scholar 

  • Vincent E A and Nightingale G 1974 Gallium in rocks and minerals of the Skaergaard intrusion; Chem. Geol. 14 63–73.

    Article  Google Scholar 

  • Wang R C, Fontan F and Monchoux P 1992 Minéraux disséminés comme indicateurs du caractère pegmatitique du granite de Beauvoir, massif d’Échassieres, Allier, France; Can. Miner. 30 763–770.

    Google Scholar 

  • Wang X, Griffin W L and Chen J 2010 Hf contents and Zr/Hf ratios in granitic zircons; Geochem. J. 44 65–72.

    Article  Google Scholar 

  • Weyer S, Musker C, Rehkämper M and Mezger K 2002 Determination of ultra-low Nb, Ta, Zr and Hf concentrations and the chondritic Zr/Hf and Nb/Ta ratios by isotope dilution analyses with multiple collector CP-MS; Chem. Geol. 187 295–313.

    Article  Google Scholar 

  • Whalen J B, Currie K L and Chappell B W 1987 A-type granites: Geochemical characteristics, discrimination, and petrogenesis; Contrib. Mineral. Petrol. 95 407–419.

    Article  Google Scholar 

  • Willis K M, Stern R J and Clauer N 1988 Age and geochemistry of late Precambrian sediments of the Hammamat series from the Northeastern Desert of Egypt; Precamb. Res. 42 173–187.

    Article  Google Scholar 

  • Wolf M B and London D 1993 Preliminary results of HFS and RE element solubility experiments in granites as a function of B and P. EOS; Trans. Am. Geophys. Union 74(16) 343.

    Google Scholar 

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Acknowledgements

I would like to thank all colleagues who assisted me in preparing this research, in Canada (Department of Earth and Planetary sciences, McGill University) and in Egypt (Nuclear Materials Authority).

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  1. Nuclear Materials Authority, Cairo, Egypt

    Soliman Abu Elatta Abdallah Mahmoud

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  1. Soliman Abu Elatta Abdallah Mahmoud
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Correspondence to Soliman Abu Elatta Abdallah Mahmoud.

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Corresponding Editor: Rajneesh Bhutani

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Mahmoud, S.A.E.A. Geology, mineralogy and mineral chemistry of the NYF-type pegmatites at the Gabal El Faliq area, South Eastern Desert, Egypt. J Earth Syst Sci 128, 156 (2019). https://doi.org/10.1007/s12040-019-1169-7

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