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Trace elements and isotope data of the Um Garayat gold deposit, Wadi Allaqi district, Egypt

  • Basem Zoheir
  • Ashraf Emam
  • Iain K. Pitcairn
  • Arman Boskabadi
  • Yann Lehaye
  • Matthew J. Cooper
Article
  • 218 Downloads

Abstract

Trace element composition of sulfides and O, C, Sr and S isotopic data are assessed to constrain the evolution and potential fluid and metal sources of the Um Garayat gold deposit. Ore microscopy and BSE investigations of quartz veins show blocky arsenopyrite and pyrite replaced in part by pyrrhotite, chalcopyrite, sphalerite, galena, and gersdorffite. Free-milling gold occurs commonly in close association with the late sulfides, and along fractures in pyrite. On the other hand, recrystallized pyrite is disseminated in host metavolcaniclastic/metasedimentary rocks that commonly contain carbonaceous material. In situ LA-ICP-MS analysis of sulfides shows the recrystallized pyrite enriched in most trace elements, while blocky pyrite contains only some traces of arsenic. Detected concentrations of gold (up to 17 ppm) were only reported in arsenopyrite disseminated in quartz veins. The δ34S values of blocky pyrite and pyrrhotite in quartz veins define a narrow range (1.6 to 3.7‰), suggesting a homogenous sulfur source which is consistent with the dominantly mafic host rocks. The recrystallized pyrite has a distinctive sulfur isotope composition (δ34S − 9.3 to − 10.6‰), which is rather comparable to diagenetic sulfides. Hydrothermal carbonate in quartz veins and wallrock have nearly constant values of δ18O (10.5 to 11.9‰) and δ13C (− 4.2 to − 5.5‰). Based on constraints from mineral assemblages and chlorite thermometry, data of six samples indicate that carbonate precipitation occurred at ~ 280 °C from a homogenous hydrothermal fluid with δ18OH2O 4.4 ± 0.7‰ and δ13C = 3.7 ± 0.8‰. Strontium isotope values of two samples (87Sr/86Sr = 0.7024 and 0.7025) are similar to the initial 87Sr/86Sr ratios of island arc metabasalts (~ 710 Ma) in the South Eastern Desert. The generally homogenous sulfur, C, O, Sr isotope data are suggestive of metamorphogenic fluids, likely produced from dominantly mafic volcanic rocks at the greenschist–amphibolite facies transition.

Keywords

Um Garayat gold deposit Wadi Allaqi South Eastern Desert of Egypt Isotope C O and Sr data of carbonate EPMA and LA-ICP-MS data of sulfides Ore genesis 

Notes

Acknowledgements

The editorial work by Prof. B. Lehmann is highly appreciated. Thanks are also due to Profs. A. Hassan, D. Craw and M. Steele-MacInnis for their constructive suggestions and insightful comments.

Funding information

Basem Zoheir likes to acknowledge the Alexander von Humboldt Foundation for making this work possible. Iain Pitcairn acknowledges the receipt of a Swedish Research Links grant (2014-4290).

Supplementary material

126_2018_807_MOESM1_ESM.docx (68 kb)
ESM 1 (DOCX 67 kb).
126_2018_807_MOESM2_ESM.xlsx (71 kb)
ESM 2 (XLSX 71 kb).

References

  1. Abd El-Naby HH, Frisch W (2002) Origin of the Wadi Haimur-Abu Swayel gneiss belt, south Eastern Desert, Egypt: petrological and geochronological constraints. Precambrian Res 113:307–322CrossRefGoogle Scholar
  2. Abd El-Naby HH, Frisch W, Hegner E (2000) Evolution of the Pan-African Wadi Haimur metamorphic sole, Eastern Desert, Egypt. J Metamorphic Petrol 18:639–651CrossRefGoogle Scholar
  3. Abdeen MM, Abdelghaffar AA (2011) Syn- and post-accretionary structures in the Neoproterozoic central Allaqi-Heiani suture zone, Southeastern Egypt. Precambrian Res 185:95–108CrossRefGoogle Scholar
  4. Abdelsalam MG, Abdeen MM, Dowidar HM, Stern RJ, Abdelghaffar AA (2003) Structural evolution of the Neoproterozoic western Allaqi-Heiani suture zone, Southern Egypt. Precambrian Res 124:87–104CrossRefGoogle Scholar
  5. Abdelsalam MG, Stern RJ (1996) Sutures and shear zones in the Arabian-Nubian Shield. J Afr Earth Sci 23(3):289–310CrossRefGoogle Scholar
  6. Ali KA, Azer MK, Gahlan HA, Wilde SA, Samuel MD, Stern RJ (2010) Age constraints on the formation and emplacement of Neoproterozoic ophiolites along the Allaqi–Heiani Suture, South Eastern Desert of Egypt. Gondwana Res 18:583–595CrossRefGoogle Scholar
  7. Alt JC, Teagle DAH, Bach W, Halliday AN, Erzinger J (1996) Stable and strontium isotopic profiles through hydrothermally altered upper oceanic crust, Hole 504B. In: Alt JC, Kinoshita H, Stokking LB, Michael PJ (Eds.), Proceedings of ocean drilling program, scientific results, College Station, TX 148: 57–69Google Scholar
  8. Boskabadi A, Pitcairn IK, Broman C, Boyce A, Teagle DAH, Cooper MJ, Azer MK, Stern RJ, Mohamed FM, Majka J (2016) Carbonate alteration of ophiolitic rocks in the Arabian-Nubian Shield of Egypt: source and compositions of the carbonating fluid and implications for the formation of Au deposits. Int Geol Rev 59(4):391–419CrossRefGoogle Scholar
  9. Brand WA, Coplen TB, Vogl J, Rosner M, Prohaska T (2014) Assessment of international reference materials for isotope-ratio analysis (IUPAC technical report). Pure Appl Chem 86:425–467CrossRefGoogle Scholar
  10. Deines P (1989) Stable isotope variations in carbonatites. In: Bell K (ed) Carbonatites: genesis and evolution. Unwin Hyman, London, pp 301–359Google Scholar
  11. Dixon TH (1981) Age and chemical characteristics of some pre-Pan-African rocks in the Egyptian Shield. Precambrian Res 14:119–133CrossRefGoogle Scholar
  12. El-Kazzaz YAHA (1995) Tectonics and mineralization of Wadi Allaqi, south Eastern Desert, Egypt. PhD thesis, University of Luton 220pGoogle Scholar
  13. El-Makky AM (2000) Applications of geostatistical methods and zonality of primary haloes in geochemical prospecting at the Um Garayat gold mine area, south Eastern Desert, Egypt. Delta J Sci 24(1):159–192Google Scholar
  14. El-Makky AM (2011) Statistical analyses of La, Ce, Nd, Y, Nb, Ti, P, and Zr in bedrocks and their significance in geochemical exploration at the Um Garayat gold mine area, Eastern Desert, Egypt. Nat Resour Res 20(3):157–176CrossRefGoogle Scholar
  15. El-Nisr SA (1997) Late Precambrian volcanism in Wadi El Allaqi area, South Eastern Desert, Egypt: an evidence for transitional continental arc/margin environment. J Afr Earth Sci 24(3):301–313CrossRefGoogle Scholar
  16. El Ramly MF, Ivaanov SS, Kochin GC (1970) The occurrence of gold in the Eastern Desert of Egypt. Studies on some mineral deposits of Egypt. Part I, Sec. A, Metallic Minerals. Geological Survey of Egypt 21, 1–22Google Scholar
  17. El-Shazly EM, Hashad AH, Sayyah TA, Bassyuni FA (1973) Geochronology of Abu Swayel area, South Eastern Desert. Egypt J Geol 17:1–18Google Scholar
  18. El-Shimi KA (1996) Geology, structure and exploration of gold mineralization in Wadi Allaqi area (SW, Eastern Desert, Egypt). Ph.D. Thesis, Ain Shams University 326pGoogle Scholar
  19. Emam A, Qaoud N, Abdel Rahman E, Fawzy KM (2014) Comprehensive mapping of the island arc rocks in the Marahiq area, South Eastern Desert, Egypt. Open Geol J 8:84–96CrossRefGoogle Scholar
  20. Emam A, Zoheir B (2013) Au and Cr mobilization through metasomatism: microchemical evidence from ore-bearing listvenite, South Eastern Desert of Egypt. J Geochem Explor 125:34–45CrossRefGoogle Scholar
  21. Finger E, Helmy HM (1998) Composition and total-Pb model ages of monazite from high-grade paragneisses in the Abu Swayel area, southern Eastern Desert, Egypt. Mineral Petrol 62:269–289CrossRefGoogle Scholar
  22. Garde-Schönberg D, Muller S (2014) Nano-particulate pressed powder tablets for LA-ICP-MS. J Anal At Spectrom 29:990–1000CrossRefGoogle Scholar
  23. Gilbert SE, Danyushevsky LV, Rodermann T, Shimizu A, Gurenko A, Meffre S, Thomas H, Large RR, Death D (2014) Optimisation of laser parameters for the analysis of sulfur isotopes in sulfide minerals by laser ablation ICP-MS. JAAS 29:1042–1051Google Scholar
  24. Groves DI, Phillips GN, Ho SE, Houstoun SM, Standing CA (1988) Craton-scale distribution of greenstone gold deposits: predictive capacity of the metamorphic model. Econ Geol 83:2045–2058Google Scholar
  25. Hassan MA, Hashad AH (1990) Precambrian of Egypt. In: Said R (Ed.) The geology of Egypt. Balkama, Rotterdam, Netherlands 201–245Google Scholar
  26. Hussein AA (1990) Mineral deposits of Egypt. In: Said R (Ed.) The geology of Egypt. Balkama, Rotterdam, Netherlands 511–566Google Scholar
  27. Ivanov TG (1988) Report of study of hydrothermal alterations in localities Um Garayat and Um Tundup, South Eastern Desert, Egypt. United Nations Development Programme in the Arab Republic of Egypt. Internal Report, Geological Survey of EgyptGoogle Scholar
  28. Ivanov TG, Hussein AA (1972) Assessment of the mineral potential of the Aswan region. Technical. Report on the geological operations carried out from July 1968 to June 1972. Egyptian Geological Survey, Internal report, No 68/73Google Scholar
  29. Kerrich R, Fryer BJ, King RW, Willmore LM, van Hees E (1987) Crustal outgassing and LILE enrichment in major lithosphere structures, Archean Abitibi greenstone belt: evidence on the source reservoir from strontium and carbon isotope tracers. Contrib Mineral Petrol 97:156–168CrossRefGoogle Scholar
  30. Khalil AE, Obeid MA, Azer M (2014) Serpentinized peridotites at the north part of the Wadi Allaqi District (Egypt): implications for the tectono-magmatic evolution of fore-arc crust. Acta Geol Sin 88(5):421–1436CrossRefGoogle Scholar
  31. Klemm DD, Klemm R, Murr A (2001) Gold of the Pharaohs-6000 years of gold mining in Egypt and Nubia. J Afr Earth Sci 33:643–659CrossRefGoogle Scholar
  32. Klemm R, Klemm D (2013) Gold and gold Mining in Ancient Egypt and Nubia, Geoarchaeology of the ancient gold mining sites in the Egyptian and Sudanese eastern deserts. Springer-Verlag, Berlin, Heidelberg 663p CrossRefGoogle Scholar
  33. Kranidiotis P, MacLean WH (1987) Systematics of chlorite alteration at the Phelps Dodge massive sulphide deposit, Matagami, Quebec. Econ Geol 82:1898–1911CrossRefGoogle Scholar
  34. Kretschmar U, Scott SD (1976) Phase relations involving arsenopyrite in the system Fe-As-S and their application. Can Mineral 14:364–386Google Scholar
  35. Kusky TM, Ramadan TM (2002) Structural controls on Neoproterozoic mineralization in the South Eastern Desert, Egypt: an integrated field, Landsat TM and SIR-C/X SAR approach. J Afr Earth Sci 35:107–121CrossRefGoogle Scholar
  36. Kyser TK (1986) Stable isotope variations in the mantle. In: Valley, J. W. (Ed.) Stable isotopes in high temperature geological processes. Mineralogical Society of America, Reviews in Mineralogy 16: 141–164Google Scholar
  37. Lanari P, Olivier Vidal O, De Andrade V, Dubacq B, Lewin E, Grosch EG, Schwartz S (2014) XMapTools: a MATLAB©-based program for electron microprobe X-ray image processing and geothermobarometry. Comput Geosci 62:227–240CrossRefGoogle Scholar
  38. Müller W, Shelley M, Miller P, Broude S (2009) Initial performance metrics of a new custom-designed ArF excimer LA-ICPMS system coupled to a two-volume laser-ablation cell. J Anal At Spectrom 24:209–214CrossRefGoogle Scholar
  39. Noweir AM, El-Amawy MA, Rashwan AA, Abdel-Aziz AM (1996) Geology and structural evolution of the Pan-African basement rocks around Wadi Umm Araka, Northeast Wadi Allaqi, South Eastern Desert, Egypt. Egypt J Geol 40(2):477–512Google Scholar
  40. Ohmoto H (1986) Stable isotope geochemistry of ore deposits. In: Valley JW, Taylor JrHP, O’Neil JR (Eds.) Stable isotopes in high temperature geological processes. Review in Mineralogy 16: 491–559Google Scholar
  41. Ohmoto H, Rye RO (1979) Isotopes of sulfur and carbon. In: Geochemistry of hydrothermal ore deposits. In: Barnes HL (Ed.). J Wiley and Sons 509–567Google Scholar
  42. Osman AMA (2014) An integrated metallotect and petrographic model for gold mineralization in the Eastern Desert of Egypt; a new prospecting vision. Egypt J Pure Appl Sci 52(2):41–54Google Scholar
  43. Oweiss KA, Khalid AM (1991) Geochemical prospecting at Um Qareiyat gold deposits, South Eastern Desert, Egypt. Ann Geol Surv Egypt 17:145–151Google Scholar
  44. Phillips GN (1993) Metamorphic fluids and gold. Mineral Mag 57:365–374CrossRefGoogle Scholar
  45. Phillips GN, Powell R (2010) Formation of gold deposits: a metamorphic devolatilization model. J Metamorph Geol 28:689–718CrossRefGoogle Scholar
  46. Pitcairn IK, Teagle DAH, Craw D, Olivo GR, Kerrich R, Brewer TS (2006) Sources of metals and fluids in orogenic gold deposits: insights from the Otago and Alpine Schists, New Zealand. Econ Geol 101:1525–1546CrossRefGoogle Scholar
  47. Ramadan TM, Sadek MF, Abu El Leil I, Salem SM (2005) Um El Touyur El Fuqani gold mineralization, South Eastern Desert, Egypt: using Landsat ETM+ imagery. Ann Geol Survey Egypt 28:263–281Google Scholar
  48. Ramadan TM, Sultan SA (2003) Integration of geological, remote sensing and geophysical data for the identification of massive sulphide zones at Wadi Allaqi area, South Eastern Desert, Egypt. Geoscience and Remote Sensing Symposium, Proceedings IEEE International 2589–2591Google Scholar
  49. Ramadan TM, Abdelsalam MG, Stern RJ (2001) Mapping gold -bearing massive sulphide deposits with Landsat TM and SIR–C/X SAR imagery in the Neoprtoterozoic Allaqi Suture, SE Egypt. J Photogramm Eng Remote Sens 67(4):491–498Google Scholar
  50. Ray JS, Ramesha R, Pandea K, Trivedi JR, Shukla PN, Patel PP (2000) Isotope and rare earth element chemistry of carbonatite ± alkaline complexes of Deccan volcanic province: implications to magmatic and alteration processes [J]. J Asian Earth Sci 18:177–194CrossRefGoogle Scholar
  51. Ridley J (1997) Syn-metamorphic gold deposits in amphibolite and granulite facies rocks. Mitt österreichen Miner Ges 142:101–110Google Scholar
  52. Rosenbaum J, Sheppard SMF (1986) An isotopic study of siderites, dolomites and ankerites at high temperatures. Geochim Cosmochim Acta 50:1147–1150CrossRefGoogle Scholar
  53. Sabet AH, Khalifa KA, Khalid AM, Arnous MM, Hassan SM, Abdel Daim AM (1983) Results of prospecting-exploration, work carried out at Um Qareiyat gold-ore deposits, Southeastern Desert, Egypt. Internal Report, Geological Survey of EgyptGoogle Scholar
  54. Sheppard SMF (1986) Characterization and isotopic variations in natural waters. In: Valley JW, Taylor HP Jr, O’Neil JR (Eds.) Stable isotopes in high temperature geological processes. Mineralogical Society of America, Rev Mineral 16: 165–183Google Scholar
  55. Stern RJ, Gwinn CJ (1990) Origin of late Precambrian intrusive carbonates, Eastern Desert of Egypt and Sudan: C, O and Sr isotopic evidence. Precambrian Res 46:259–272CrossRefGoogle Scholar
  56. Stern RJ, Hedge CE (1985) Geochronologic and isotopic constraints on Late Precambrian crustal evolution in the Eastern Desert of Egypt. Am J Sci 285:97–127CrossRefGoogle Scholar
  57. Stern RJ, Kröner A, Rashwan AA (1991) A late Precambrian (∼710 Ma) high volcanicity rift in the south Eastern Desert of Egypt. Geol Rundsch 80:155–170CrossRefGoogle Scholar
  58. Taylor HP, Frechen J, Degens ET (1967) Oxygen and carbon isotope studies ofcarbonatites from the Laacher See District, West Germany and the Alnö District, Sweden. Geochim Cosmochim Acta 31:407–430CrossRefGoogle Scholar
  59. Taylor BE (1986) Magmatic volatiles: isotopic variations of C, H, and S. In: Valley JW, Taylor HP Jr, O’Neil Jr (Eds.) Stable isotopes in high temperature geological processes. Mineral Society of America 16:185–226Google Scholar
  60. Van Achterbergh ERCG, Jackson SE, L GW (2001) Data reduction software for LA-ICP-MS p. 239–243, in: S. P.), (Ed.), Laser-ablation-ICPMS in the earth sciences—principles and applications, Mineralogical Association of Canada short course series St John, NewfoundlandGoogle Scholar
  61. Verkouteren RM, Klinedinst DB (2004) Value assignment and uncertainty estimation of selected light stable isotope reference materials: RMs 8543–8545, RMs 8562–8564, and RM 8566. NIST Special publication 260–149, 58p Google Scholar
  62. Wilson SA, Ridley WI, Koenig AE (2002) Development of sulfide calibration standards for the laser ablation inductively-coupled plasma mass spectrometry technique. J Anal At Spectrom 17:406–409CrossRefGoogle Scholar
  63. Yuan JH, Zhan XC, Fan CZ, Zhao LH, Sun DY, Jia ZR, Hu MY, Kuai LJ (2012) Quantitative analysis of sulfide minerals by laser ablation-inductively coupled plasma-mass spectrometry using glass reference materials with matrix normalization plus sulfur internal standardization calibration. Chin J Anal Chem 40:201–207CrossRefGoogle Scholar
  64. Zheng YF, Hoefs J (1993) Carbon and oxygen isotope covariations in hydrothermal calcites: theoretical modeling on mixing processes and application to Kushikino gold mining area in Japan. Mineral Deposita 25:246–250Google Scholar
  65. Zoheir BA (2004) Gold mineralization in the Um El Tuyor area, south Eastern Desert, Egypt: geologic context, characteristics and genesis. Ph.D. Thesis, Ludwig Maximilians Universität, München, Germany 159pGoogle Scholar
  66. Zoheir BA (2008a) Characteristics and genesis of shear zone-related gold mineralization in Egypt: a case study from the Um El Tuyor mine, south Eastern Desert. Ore Geol Rev 34:445–470CrossRefGoogle Scholar
  67. Zoheir BA (2008b) Structural controls, temperature-pressure conditions and fluid evolution of orogenic gold mineralisation in Egypt: a case study from the Betam gold mine, south Eastern Desert. Mineral Deposita 43:79–95CrossRefGoogle Scholar
  68. Zoheir BA (2012) Controls on lode gold mineralization, Romite deposit, South Eastern Desert, Egypt. Geosci Front 3(5):571–585CrossRefGoogle Scholar
  69. Zoheir BA, Emam A (2014) Field and ASTER imagery data for the setting of gold mineralization in Western Allaqi-Heiani belt, Egypt: a case study from the Haimur deposit. African. Earth Sci 99(1):150–164Google Scholar
  70. Zoheir BA, Klemm DD (2007) The tectono-metamorphic evolution of the central part of the Neoproterozoic Allaqi–Heiani suture, south Eastern Desert of Egypt. Gondwana Res 12:289–304CrossRefGoogle Scholar
  71. Zoheir BA, Lehmann B (2011) Listvenite–lode association at the Barramiya gold mine, Eastern Desert, Egypt. Ore Geol Rev 39(1):101–115CrossRefGoogle Scholar
  72. Zoheir BA, Moritz R (2014) Fluid evolution in the El-Sid gold deposit, Eastern Desert, Egypt. Geol Soc Lond, Spec Publ 402(1):147–175CrossRefGoogle Scholar
  73. Zoheir BA, Qaoud NN (2008) Hydrothermal alteration geochemistry of the Betam gold deposit, south Eastern Desert, Egypt: mass-volume-mineralogical changes and stable isotope systematics. Appl Earth Sci 117(2):55–76CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Geology, Faculty of ScienceBenha UniversityBenhaEgypt
  2. 2.Institute of GeosciencesUniversity of KielKielGermany
  3. 3.Department of Geology, Faculty of ScienceAswan UniversityAswanEgypt
  4. 4.Department of Geological SciencesStockholm UniversityStockholmSweden
  5. 5.Department of Geological SciencesUniversity of TexasDallasUSA
  6. 6.Finland Isotope Geosciences Laboratory, Geological Survey of FinlandEspooFinland
  7. 7.National Oceanography Centre SouthamptonUniversity of SouthamptonSouthamptonUK

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