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Diagenetic and metamorphic history of the Umm Nar BIF, Eastern Desert, Egypt

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Abstract

The Umm Nar BIF was formed in a sedimentary environment. It is confined to an upper stratigraphic zone of pre-Pan-African metamorphosed shelf deposits. During the Pan-African deformational history, the BIF and the host metasediments were tectonically' overlain by ophiolitic melange succession. The metasediments and the mélange were subjected to a major folding phase and then thrust over the “Shaitian” sheared granite, prior to the intrusion of syn- to late- orogenic granitoids. The BIF is divisible into two main types: oxide-bands including magnetite and hematite, and oxide-silicate bands including magnetite, hematite and stilpnomelane. The associated gangues are quartz, calcite, epidote, garnet, plagioclase, graphite and muscovite. Rhythmic banding and lamination, cross-lamination and flaser structure are the most prominent primary features in the IF bands. The iron minerals and the associated gangue show a variety of textural aspects and microscopic interrelationships which indicate successive episodes of mineral accumulation and formation, involving deposition, recrystallization, blastic growths, overgrowths, replacement and deformations, during continuous burial and subsequent tectonic deformations.

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References

  • Acharya, S., Amstutz, G.C., Sarangi, S.K. (1982) Diagenetic crystallisation and migration in the banded iron formations of Orissa, India. In: Amstutz, G.C., El Goresy, A., Frenzel, G., Kluth, C., Mob, G., Wauschkuhn, A. Zimermann, R.A., (eds.) Ore genesis, the state of the art. Springer, Berlin Heidelberg New York, pp. 442–449

    Google Scholar 

  • Akaad, M.K., El Ramly, M. (1963) Geology and structure of Umm Lassaf-Umm Nar iron belt. Geol. Surv. Egypt. 17:23 p.

    Google Scholar 

  • Berner, P.A. (1969) Goethite stability and the origin of red beds. Geochim. Acta. 33:267–273

    Article  Google Scholar 

  • Beukes, N.J. (1983) Paleoenvironmental setting or iron-formations in the depositional basin of the Transvaal Supergroup, South Africa. In: Trendall, A.F., Morris, R.C. (eds.) Iron-formation, facts and problems (Developments in Precambrian Geology, Vol. 6). Elsevier, Amsterdam New York, pp. 131–209

    Google Scholar 

  • Blake, R.L. (1965) Iron phyllosilicates of the Cuyuna District in Minnesota. Am. Miner. 50:148–169

    Google Scholar 

  • Dimroth, E., Chauvel, J.J. (1973) Petrography of the Sokoman iron formation in part of the Central Labrador Trough, Quebec, Canada. Geol. Soc. Am. Bull. 84:111–134

    Article  Google Scholar 

  • Dorr, J.V.N. (1973) Iron-formation in South America. Econ. Geol. 68:1005–1022

    Google Scholar 

  • Dymek, R.F., Klein, C. (1988) Chemistry, petrology and origin of banded iron-formation lithologies from the 3800 Ma Isua supracrustal belt, West Greenland. Precambrian Res. 39:274–302

    Article  Google Scholar 

  • El Aref, M.M., Lotfy, Z.H. (1985) Genetic karst significance of the iron ore deposits of El Bahariya Oasis, Western Desert, Egypt. Ann. Geol. Surv., Egypt, XV (1989), pp. 1–30

    Google Scholar 

  • El Aref, M.M.; Abdel Wahed, M., El Dougdoug, A., El Manawi, A. W. (1993a) Geologic setting and deformational history of Umm Nar BIF and associated rocks. Eastern Desert, Egypt. Egypt. J. Geol. (in press)

  • El Aref, M.M., El Dougdoug, A.A., Mesaed, A.A. (1993b) Petrography and diagenesis of the high-lying ferricretes of El Bahariya Depression, Western Desert, Egypt. Egypt. Mineralogist (in press)

  • El Gaby, S., List, F.K., Tehrani, R. (1988) Geology evolution and metallogenesis of the Pan-African belt in Egypt. In: El Gaby, S., Greiling, R.O. (eds.) The Pan-African belt of northeast Africa and adjacent areas. Vieweg, Braunschweig, pp. 17–68

    Google Scholar 

  • El Gaby, S., List, F.K., Tehrani, R. (1990). The basement complex of the Eastern Desert and Sinai. In: Said, R. (ed.) The Geology of Egypt. Balkema, Rotterdam, pp. 175–184

    Google Scholar 

  • El Sharkawi, M.A., El Aref, M.M., El Manawi, A.W. (1989) Paleoenvironments, classification and diagenetic aspects of ironstones in the Mesozoic sediments of El Maghara area, north Sinai, Egypt. Egypt. Mineralogist. 1:1–25

    Google Scholar 

  • El Shazly, E.M. (1957) Classification of Egyptian mineral deposits. Egypt. J. Geol. 1:1–20

    Google Scholar 

  • Ewers, W.E., Morris, R.C. (1981) Studies of the Dales Gorge Member of the Brockman iron-formation, Western Australia. Econ. Geol. 76:1929–1953

    Google Scholar 

  • French, B.M. (1968) Progressive metamorphism of the Biwabic iron formation, Mesabi Range, Minnesota. Minnesota Geol. Surv. Bull. 45:103 p.

    Google Scholar 

  • Frietsch, R. (1970) Trace elements in magnetite and hematite. Sveriges Geol. Unders Arsbok 64:1–136

    Google Scholar 

  • Garson, M.S., Shalaby, I.M. (1976) Precambrian-lower Paleozoic plate tectonics and metallogenesis in the Red Sea region. Geol. Assoc. Canada Spec. Paper 14:573–596

    Google Scholar 

  • Gole, M.J. (1980) Mineralogy and petrology of very-low metamorphic grade Archean banded iron formation, Weld Range, Western Australia. Am. Miner. 65:8–25

    Google Scholar 

  • Gole, M.J. (1981) Archean banded iron-formations, Yilgarn Block, Western Australia. Econ. Geol. 76:1954–1975

    Google Scholar 

  • Graf, J.L. (1978): Rare earth elements iron-formations and sea water. Geochim. Cosmochim. Acta. 42:1845–1850

    Article  Google Scholar 

  • Greiling, R.O., Kröner, A., El Ramly, M.F., Rashwan, A.A. (1988) Structural relationships between the Southern and Central Parts of the Eastern Desert of Egypt. Details of a fold and thrust belt. In: El Gaby, S., Greiling, R.O. (eds.) The Pan-African belt of Northeast Africa and adjacent areas. Vieweg, Braunschweig, pp. 121–145

    Google Scholar 

  • Griffin, A.C. (1980) Structural geology and sites of iron ore deposition in Koolyanobbing Range, W.A. Second Int. Archean Symp., Perth. Geol. Soc. Aust. and I.G.C.P., Archean Geochemistry Project, pp. 64–65 (abstract)

  • Gross, G.A., Mcleod, C.R. (1980) A preliminary assessment of the chemical composition of iron formation in Canada. Can. Mineralogist 181:223–229

    Google Scholar 

  • Han, T.M. (1971) Diagenetic, metamorphic, replacement features in the Negaunee Formation of the Marquette iron range, Lake Superior District. Soc. Mining Geologists, Japan. Spec. Issue 3:430–438

    Google Scholar 

  • Han, T.M. (1978) Microstructures of magnetite as guides to its origin in some Precambrian iron-formations. Fortschr. Miner. 56:105–142

    Google Scholar 

  • Han, T.M. (1982) Iron formations of Precambrian age: hematitemagnetite relationships in some Proterozoic iron deposits. A microscopic observation. In: Amstutz, G.C., El Goresy, A., Frenzel, G., Kluth, C., Mob, G., Wauschkuhn, A., Zimmermann, R.A. (eds.) Ore genesis, the state of the art. Springer, Berlin Heidelberg New York, pp. 451–459

    Google Scholar 

  • Hashad, A.H., Hassan, M.A. (1979) On the validity of an ensimatic island arc cratonization model to the evolution of the Egyptian Shield. Ann. Geol. Surv. Egypt. 9:70–80

    Google Scholar 

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

    Google Scholar 

  • Hussein, A.A., El Sharkawi, M.A. (1990) Mineral deposits. In: Said, R. (ed.) The Geology of Egypt. Balkema, Rotterdam, pp. 511–566

    Google Scholar 

  • Ivanov, T., Shalaby I.M., Hussein, A.A. (1973) Metallogenic characteristics of South Eastern Desert, Egypt. Ann Geol. Surv. Egypt 3:139–166

    Google Scholar 

  • James, H.L. (1955) Zones of regional metamorphism in the Precambrian of Northern Michigan. Geol. Soc. Am. Bull. 66:1455–1488

    Google Scholar 

  • Klein, C. Jr (1983) Diagenesis and metamorphism of Precambrian banded iron formations. In: Trendall A.F., Morris R.C. (eds.) Iron formation, facts and problems. (Development in Precambrian Geology, vol. 6) Elsevier, Amsterdam New York, pp. 417–465

    Google Scholar 

  • Klein, C. Jr, Bricker O.P. (1977) Some aspects of sedimentary and diagenetic environments of Proterozoic banded iron formation. Econ. Geol. 72:1457–1470

    Google Scholar 

  • Lougheed, M.S. (1983) Origin of Precambrian iron formations in the Lake Superior region. Geol. Soc. Am. Bull. 94:325–340

    Article  Google Scholar 

  • Majumder, T., Chakraborty, K.L., Bhattacharyya, A. (1982) Geochemistry of banded iron-formation of Orissa, India. Mineral. Deposita 17:107–118

    Article  Google Scholar 

  • Martin, R.F., Piwinski, A.J. (1969) Experimental data bearing on the movement of iron in an aqueous vapour. Econ. Geol. 64:798–803

    Google Scholar 

  • Mel'nik, Y.P. (1982) Precambrian banded iron-formations, physicochemical conditions of formation. Elsevier, Amsterdam New York, 310 p.

    Google Scholar 

  • Morris, R.C. (1985) Genesis of iron ore in banded iron-formation by supergene and supergene-metamorphic process—A conceptual model. In: Wolf, K. (ed.) Handbook of stratabound and stratiform ore deposits, vol 13. Elsevier, Amsterdam New York, pp. 73–235

    Google Scholar 

  • Nicholls, G.D. (1967) Trace elements in sediments: an assessment of their possible utility as depth indication. Marine Geol. 5:539–555

    Article  Google Scholar 

  • Perry, E.C., Tan, F.C., Morey, G.B. (1973) Geology and stable isotope geochemistry of the Biwabic Iron Formation, Northern Minnesota. Econ. Geol. 68:1110–1125

    Google Scholar 

  • Rasmy, A.H. (1968) Mineralogical and lithological studies of the Umm Nar iron ore deposit (Eastern Desert of Egypt). M.Sc. Thesis, Fac. Sci., Assiut Univ., Assiut, Egypt, 121 p.

    Google Scholar 

  • Rösler, H.J., Lange, H. (1972) Geochemical tables. Elsevier Amsterdam, New York 468 p.

    Google Scholar 

  • Shaw, D.M. (1964) Interpretation geochimique des elements en Fraces dans les roches cristallines. Mason, Paris

    Google Scholar 

  • Sims, P.K., James, H.L. (1984) Banded iron ore formation of Late Proterozoic age in the Central Eastern Desert, Egypt: geological and tectonic setting. Econ. Geol. 79:1777–1784

    Google Scholar 

  • Towe, K.M., Moench, T.T. (1981) Electron-optical characterization of bacterial magnetite. Earth Plan. Sci. Let. 52:213–220

    Article  Google Scholar 

  • Trendall, A.F. (1966) Altered pyroclastic rocks in iron-formation in the Hamersley Range, Western Australia. Econ. Geol. 61:1451–1458

    Google Scholar 

  • Trendall, A.F. (1973a) Varve cycles in the Weeli Wolli formation of the Precambrian Hamersley Group. Western Australia. Econ. Geol. 68:1089–1097

    Google Scholar 

  • Trendall, A.F. (1973b) Precambrian iron-formations of Australia. Econ. Geol. 68:1023–1034

    Article  Google Scholar 

  • Trendall, A.F., Blockley, J.G. (1970) The iron formations of the Precambran Hamersley Group, Western Australia, with special reference to the associated crocidolite. West Aust. Geol. Surv. Bull. 119:366 p.

    Google Scholar 

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El Aref, M.M., El Dougdoug, A., Abdel Wahed, M. et al. Diagenetic and metamorphic history of the Umm Nar BIF, Eastern Desert, Egypt. Mineral. Deposita 28, 264–278 (1993). https://doi.org/10.1007/BF02421576

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