Arabian Journal of Geosciences

, Volume 6, Issue 10, pp 3669–3681 | Cite as

Mineral chemistry of banded migmatites from Hafafit and Feiran areas, Egypt

  • Mona Kabesh
  • Asran M. Asran
  • Ezzat Abdel Rahman
Original Paper
First Online:
Received:
Accepted:

Abstract

The migmatitic rocks exposed in Hafafit and Feiran areas exhibit some migmatitic structures as the banded, agmatic, boudinage and schlieren structures. The dominant type of these structures is the stromatic migmatites. Electron microprobe analyses of plagioclases, biotites and amphiboles from Hafafit and Feiran areas, in the Eastern Desert and Sinai, Egypt, are carried out and the metamorphic conditions are discussed. The present study revealed marked differences in the composition of plagioclases, biotites and amphiboles from Hafafit and Feiran localities. The obtained data indicated that plagioclases of the Feiran migmatites are of andesine and oligoclase composition, and display anorthite content from An20 to An38; whereas the Hafafit migmatites show a wider range of plagioclases from An10 to An60, and therefore plagioclases have labradorite, andesine and oligoclase composition. This may be due to the slow rate of the crystallisation processes. The analyses indicated that biotites of the studied areas are of metamorphic origin showing significant variation in Fe–Mg. It is worth mentioning that biotites from Hafafit migmatites have Mg–biotite composition while that of Feiram migmatites have Fe–biotite composition. High Mg and low Fe contents in biotite suggest higher crystallisation temperature. The composition of amphiboles in Hafafit migmatites is ferro-tschermakitic hornblende, while amphiboles from Feiram migmatites are magnesio-hornblende. High Ti content in the hornblende of Feiran migmatites suggests that they were formed at slightly higher temperatures and lower pressure than the Hafafit migmatites (i.e. Feiram migmatites and Hafafit migmatites were formed at granulite and amphibolite facies, respectively). Discrimination diagrams show that the muscovite is of secondary origin. Moreover, the present study confirmed that these migmatites are mainly formed by metamorphic differentiation via partial melting.

Keywords

Migmatites Mineral chemistry Eastern desert Sinai Hafafit Feiran Egypt 
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References

  1. Abdel Aal AY (1994) Typochemical properties of some mafic minerals in late Proterozoic granitoids of the mount Abu Bedun, North Eastern Desert, Egypt. Egyptian Mineral 6:31–51Google Scholar
  2. Abdel Wahed M, Abdel Khalek ML, Hafez AMA (1985) Structural evolution of the gneisses and ophiolitic melange rocks in the northern Migif-Hafafit area, South eastern Desert, Egypt. Annals Geol Surv Egypt 14:279–307Google Scholar
  3. Akaad MK, El-Gaby S, Abbas AA (1967a) Geology and petrology of the migmatites around Feiran Oasis, Sinai. Assiut Sci Technol Bull 10:67–87Google Scholar
  4. Akaad MK, El-Gaby S, Abbas AA (1967b) On the evolution of Feiran migmatites. Egypt J Geol 11:49–58Google Scholar
  5. Ashworth JR (1985) Introduction. In: Ashworth JR (ed) Migmatites. Blackie, Glasgow, pp 1–35CrossRefGoogle Scholar
  6. Asran AMH, Kabesh M (2012) Evolution and geochemical studies on a stromatic migmatite–amphibolite association in Hafafit area, CED, Egypt. Egypt J Biol Earth Sci 2(1):E17–E33Google Scholar
  7. Brown M (1973) The definition of metayexites, diatexites and migmatite. Proc Geol Assoc 84:371–382CrossRefGoogle Scholar
  8. Brown EH (1977) The crossite content of Ca- amphibole as a guide to pressure of metamorphism. J Petrol 18:53–72CrossRefGoogle Scholar
  9. Bushlyakov IN (1969) Titanium content of amphibole and biotite from granitoids as an indicator of the conditions under which they formed. Dokl Akad Nauk SSSR V 186(4):924–927Google Scholar
  10. Butler BCM (1977) Chemical study of minerals from Moine schist of the Ardnamurchan area, Argyllshire. Scotland J Petrol 8:233–267CrossRefGoogle Scholar
  11. Deer WA, Howie RA, Zussman J (1966) An introduction to the rock-forming minerals. Longman, Hong Kong, p 696Google Scholar
  12. Dymek RF, Albee AL (1977) Titanium and aluminum in biotite from high-grade Archaean gneisses. LangØ Wst Greenland. Amer Geophys Union Trans 58:525, abstractGoogle Scholar
  13. El Gaby S (1984) Tectonic evolution of the Basement Complex in the Central Eastern Desert of Egypt. Geol Rundsch 73(3):1019–1036, StuttgartCrossRefGoogle Scholar
  14. El Gaby S, Ahmed AA (1980) The Feiran–Solaf gneiss belt, SW of Sinai, Egypt. In: Evolution and Mineralization of the Arabian–Nubian Shield. Inst App Geol (Jeddah) 3:95–105Google Scholar
  15. El Gaby S, List, FK, Tehrani R (1987) Geology evolution and metallogenesis of the Pan-African Belt in Egypt. In: El Gaby S, Greiling RO (eds.) The Pan-African Belt of NE Africa and adjacent areas. Earth Evol Sci Viewing and Sohn, Braunschweig, Wiesbaden 17–68Google Scholar
  16. El Ramly MF (1972) A new Geological map for the basement rocks in the Eastern and Southwestern Desert of Egypt. Annals Geopl Surv Egypt 2:1–18Google Scholar
  17. El Ramly MF, Greiling R, Kroner A, Rashwan AA (1984) On the tectonic evolution of the Wadi Hafafit area environs, Eastern Desert of Egyot. Bull Fac Earth Sci King Abdulaziz Univ 6:113–126Google Scholar
  18. El Ramly MF, Greiling R, Kroner A, Rashwan AA, Rasmy AH (1993) Explanatory note to accompany the geological and structural maps of Wadi Hafafit area, Eastern Desert of Egypt. Geol Surv Egypt Paper 68:1–53Google Scholar
  19. El Tokhi M (1992) Petrographical, geochemical and experimental studies on the migmatite rocks of Wadi Feiran, southern Sinai, Egypt. Friderciana Univ, KarlsruheGoogle Scholar
  20. Foster MD (1960) Interpretation of the composition of trioctahedral micas. US Geol Surv Prof Paper 345B:1–49Google Scholar
  21. Fowler AA, El Kalioubi B (2002) The Migif-Hafaait gneissic complex of the Egyptian Eastern Desert: fold imterference patterns involving multiply deformed sheath folds. Tectonophysics 346:247–275CrossRefGoogle Scholar
  22. Girardeau J, Mevel C (1982) Amphibolitized sheared Gabbros from ophiolites as indicators of the evolution of the oceanic crust: Bay of Islands, Newfoundland. Earth Planet Sci Lett 61:151–165CrossRefGoogle Scholar
  23. Guidotti CV, Sassi FP (1976) Muscovite as a petrogenetic indicator mineral in pelitic schists. Neues Jahrbuch Fur Mineralogie Abhandlungen 127:97–142Google Scholar
  24. Harris NBW (1974) Some migmatite types and their origins, from the Barousse Massif, Central Pyrenees. Geol Mag 111:319–328CrossRefGoogle Scholar
  25. Hynes A (1982) A comparison of amphiboles from medium and low pressure metabasits. Contrib Mineral Petrol 81:119–125CrossRefGoogle Scholar
  26. Johannes W (1980) Metastable melting in the granite system Qz-Or-Ab-An-H2O. Contrib Mineral Petrol 72:73–80CrossRefGoogle Scholar
  27. Johannes W (1988) What controls partial melting in migmatite? J Metamorp Geol 6:451–465CrossRefGoogle Scholar
  28. Kabesh MML (1993) Geological, petrological and geochemical studies on the migmatitic rocks of Wadi Feiran, South western Sinai, Egypt. Ph.D. dissertation, Cairo University 180pGoogle Scholar
  29. Kabesh ML, Salem AKA, Shesawi YA (1988) Chemistry of biotite as a guide to the petrogenesis of some granitoid rocks, Eastern Desert, Egypt: a review. Bull Fac Sci, Assiut Univ 17(2–F):203–217Google Scholar
  30. Kabesh M, Al-Aref MM, Johannes W, Abdel Wahed M (1996) Migmatization processes and development of banded (stromatic) texture, example from Wadi Feiran migmatite belt. 3th intern. Conf. Geol. Arab world (abstract)Google Scholar
  31. King RJ (1989) Alkali feldspar (part 1). Geology today, Nov.–Dec. 211–213Google Scholar
  32. Klob H (1970) A porphyritic granite in the Sondle-Karlstift. Liebenau area near Freistadt. Muhlviertal Upper Austria. Tschermarks Miner U Petrog Mott v.14:323–334Google Scholar
  33. Larid J, Albee AL (1981) Pressure, temperature and time indicators in mafic schist: their application to reconstructing the polymetamorphic history of Vremont. Am J Sci 281:127–175CrossRefGoogle Scholar
  34. Leake BE (1978) Nomenclature of amphiboles. Am Mineral 63:1023–1052Google Scholar
  35. Lebedev VI (1964) Vopr. Magmatizma: metafrizma (Igneous activity and metamorphism), 2, LeningradeGoogle Scholar
  36. Marakushev AA, Tararin IA (1965) On the mineralogical criteria of alkalinity of the granites. Izv Akad Nauk SSSR Ser Geol 3:20–37Google Scholar
  37. Mehnert KR (1968) Migmatites and the origin of granitic rocks. Elsevier, Amsterdam, p 393Google Scholar
  38. Nockolds SR (1947) The relation between chemical composition and paragenesis in the biotite micas of igneous rocks. Am J Sci 245:401–420CrossRefGoogle Scholar
  39. Pattison DRM, Harte B (1988) Evolution of structurally contrasting anatectic migmatites in the 3-kbar Ballachulish aureole, Scotland. J Metamorph Geol 6:475–494CrossRefGoogle Scholar
  40. Rasse P (1974) Al and Ti contents of hornblende, indicators of pressure and temperature of regional metamorphism. Contrib Mineral Petrol 45:321–336Google Scholar
  41. Sawyer EW (1996) Criteria for the recognition of partial melting. Phys Chem Earth (A) 24:269–279CrossRefGoogle Scholar
  42. Sobolev ID (1966) Tez. Dokl. II Ural,sk petrografich soveshch (Abstracts of the second Ural petrological conference) 4, SverdlovskGoogle Scholar
  43. Velde B (1967) Si4+ content of natural phengites. Contrib Mineral Petrol 17:250–258CrossRefGoogle Scholar
  44. Zarkutkin VV, Grigorenko MV (1968) Titanium and alkalies in biotite in metamorphic facies. Dokl Akad Nauk SSSR 3:683–686Google Scholar

Copyright information

© Saudi Society for Geosciences 2012

Authors and Affiliations

  • Mona Kabesh
    • 1
  • Asran M. Asran
    • 2
  • Ezzat Abdel Rahman
    • 3
  1. 1.Geology Department, Faculty of ScienceCairo UniversityCairoEgypt
  2. 2.Geology Department, Faculty of ScienceSohag UniversitySohagEgypt
  3. 3.Geology Department, Faculty of ScienceSouth Valley UniversityAswanEgypt

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