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Carbonates and Evaporites

, 21:176 | Cite as

Diagenesis and geochemistry of the Aptian dolomite (cretaceous) in the Razzak Oil Field, western Desert, Egypt

  • Rifai I. Rifai
  • Mossbah M. Kolkas
  • Hanafy M. Holail
  • Khaled A. Khaled
Article
  • 273 Downloads

Abstract

Petrographic study of selected thin sections from the Aptian dolomites in the Razzak Oil Field, Egypt reveals three dolomite textures. These textures have been classified based on crystal size, shape, uniformity, and trace element distribution. These textures are as follows: 1) finely crystalline, planar-e dolomite, 2) medium to coarsely crystalline, non-planar dolomite, and 3) very coarsely crystalline, non-planar dolomite (saddle dolomite). Stable isotope analyses indicates that the Aptian dolomites formed in a marine environment and were later subjected to several diagenetic modifications that affected the original sediments. The finely crystalline, planar-e dolomite is penecontemporaneous in origin with δ18O that ranges from −7.51 to −8.14‰ VPDB and δ13C that ranges from +0.39 to −1.27‰ VPDB. The medium to coarsely crystalline, non-planar dolomite is a replacement type with a meteoric origin. In this non-planar dolomite, the δ18O ranges from −7.99 to −8.82‰ VPDB and the δ13C ranges from −0.58 to −1.35‰ VPDB. The void-filling (saddle dolomite) is the product of chemical compaction and is associated with the thermal sulfate reduction event. This saddle dolomite has δ18O that ranges from −7.89 to −8.76‰ VPDB and δ13C that ranges from +1.41 to +2.42‰ VPDB. The diagenetic parasequence of the Aptian Dolomite is recorded by: 1) deposition of the original sediments (lime mud); 2) dolomitization; 3) silicification, 4) pyritization, and 5) precipitation of saddle dolomites (pore-filling dolomite).

Keywords

Aptian dolomites Razzak Oil Field penecontemporaneous planar-e dolomite non-planar dolomite saddle dolomite 

References

  1. ABDINE, A.S., 1974, Oil and gas discoveries in the Northern Western Desert of Egypt, WEPCO, unpublished internal report.Google Scholar
  2. ABDINE, A.S. and DEIBIS, S., 1972, Lower Cretaceous Aptian sediments and their oil prospects in the Northern Western Desert, Egypt. 8th Arab Petroleum Congress, Algiers, v. III.Google Scholar
  3. ABOU-KHADRAH, A.M., SANA, A., and KHALED, K.A., 1978, Origin and Diagenesis of the Aptian Alamein Dolomite in Razzak oil field, North Western Desert, Egypt:Chemie der Erde/Geochemistry, v. 37, p. 154–164.Google Scholar
  4. ABU EL NAGA, M., 1983, Northwestern desert stratigraphic summary: A conoco’s chart compiled from different official sources. Unpublished internal charts.Google Scholar
  5. ABU EL NAGA, M., 1984, Palaeozoic and Mesozoic depocentres and hydrocarbon generating areas, Northern Western Desert: E.G.P.C. Eleventh Exploration and Production Conference, Cairo, p. 269–287.Google Scholar
  6. BANNER, J.L., HANSON, G.N., and MEYERS, W.J., 1988, Water-rock interaction history of regionally extensive dolomites of the Burlington-Keokuk Formation (Mississippian): Isotopic evidence,in V. Shukla and P.B. Baker, eds., Sedimentology and Geochemistry of Dolostones: SEPM Special Publication, no. 43, p. 97–113.Google Scholar
  7. BENITO, M. I., LOHMANN, K.C., and MAS, R., 2006. Microsized dolomite inclusions in ferroan calcite cements developed during burial diagenesis of Kimmeridgian Reefs, Northern Iberian Basin, Spain:Journal of Sedimentary Research, v. 76, p. 472–482.CrossRefGoogle Scholar
  8. BRAUN, M. and FRIEDMAN, G.M., 1969, Carbonate lithofacies and environments of the Tribes Hill Formation (Lower Ordovician) of the Mohawk Valley, New York:Journal of Sedimentary Petrology, v. 39, p. 113–135.Google Scholar
  9. CURTIS, R.E., EVANS, G., KINSMAN, D.J.J., and SHEARMAN, D.J., 1963, Association of dolomite and anhydrite in the recent sediments of the Persian Gulf:Nature, v. 197, p. 679–680.CrossRefGoogle Scholar
  10. DODD, R.J. and STANTON, R.J., JR., 1981, Paleoecology, Concepts and Applications. Wiley & Sons, Inc., 559 p.Google Scholar
  11. EL-SHAZLY, E.M., 1977, The Geology of the Egyptian Region: The Ocean Basins and Margins, Plerim Publishing Corporation, v. 4A, p. 379–444.Google Scholar
  12. ELZARKA, M.H., 1983, Mode of hydrocarbon generation and prospects of the northern part of the Western Desert, Egypt:Journal of African Earth Science, v. 14, p. 294–318.Google Scholar
  13. FISHER, D.W., 1954, Lower Ordovician (Canadian) stratigraphy of Mohawk Valley, New York:Geological Society of America Bulletin, v. 65, p. 71–96.CrossRefGoogle Scholar
  14. FRIEDMAN, G.M., 1965, Terminology of crystallization textures and fabrics in sedimentary rocks:Journal of Sedimentary Petrology, v. 35, p. 643–655.Google Scholar
  15. FRIEDMAN, G.M., 1966, Occurrence and origin of Quaternary dolomite of Salt Flat, west Texas:Journal of Sedimentary Petrology, v. 36, p. 263–267.Google Scholar
  16. FRIEDMAN, G.M. and RADKE, B.M., 1979, Evidence for sabkha overprint and conditions for intermittent emergence in Cambro-Ordovician carbonates of northeastern North America and Queensland, Australia:Northeastern Geology, v. 1, p. 18–42.Google Scholar
  17. FRIEDMAN, G.M. and SANDERS, J.E., 1967, Origin and occurrence of dolostones,in G.V. Chilingar, H.J. Bissell, and R.W. Fairbridge, eds., Carbonate Rocks: Origin, occurrence and classification. Amsterdam, Elsevier, p. 267–348.CrossRefGoogle Scholar
  18. FRIEDMAN, G.M. and SANDERS, J.E., 1978, Principles of Sedimentology. Wiley, New York, 792 p.Google Scholar
  19. FRIEDMAN, G.M., SANDERS, J.E., and KOPASKA-MERKEL, D.C., 1992, Principles of sedimentary deposits: Stratigraphy and Sedimentology. Macmillan Publishing Co., New York, 717 p.Google Scholar
  20. FRIEDMAN, I. and MURATA, K.J., 1979, Origin of dolomite in Miocene Monterey Shale and related formations in the Temblor Range, California:Geochimica Cosmochimica Acta, v. 43, p. 1357–1365.CrossRefGoogle Scholar
  21. GEZEERY N.H., MOHSEN S.M., and FARID M.L., 1972, Sedimentary basins of Egypt and their petroleum prospects: 8th Arab Petroleum Congress, Algiers, v. III.Google Scholar
  22. GLUMAC, B. and WALKER, K.R., 2002, Effects of grand-cycle cessation on the diagenesis of Upper Cambrian carbonate deposits in the southern Appalachians, USA:Journal of Sedimentary Research, v. 72, p. 570–586CrossRefGoogle Scholar
  23. GREGG, J.M., HOWARD, S.A., and MAZZULLO, S.J., 1992, Early diagenetic recrystallization of Holocene (<3000 years old) peritidal dolomites, Ambergris Cay, Belize:Sedimentology, v. 39, p. 143–160CrossRefGoogle Scholar
  24. GUIRAUD, R., 1998, Mesozoic rifting and basin inversion along the northern African Tethyan margin: an overview,in D.S. MacGregor, R.T.J. Moody, D.D. Clark-Lowes, eds., Petroleum Geology of North Africa, London: Geological Society Special Publication, v. 132, p. 217–229.Google Scholar
  25. HANS, G.M., 1987, Saddle dolomite as a by-product of chemical compaction and thermochemical sulfate reduction:Geology, v. 15, no. 10, p. 936–940.CrossRefGoogle Scholar
  26. HARDIE, L.A., 1987, Dolomitization- a critical review of some current views:Journal of Sedimentary Petrology, v. 57, p. 166–183.Google Scholar
  27. HAQ, B.U., 1991, Sequence stratigraphy, sea-level change, and significance for the deep sea,in D.I.M MacDonald, ed., Sedimentation, Tectonic and Eustasy: Sea-Level Changes at Active Margins: International Association of Sedimentologists Special Publication, no. 12, p. 3–39.Google Scholar
  28. HEIM, A., 1932, Bergsturz und Menschenleben. Fretz and Wasmuth Verlag, Zürich, 218 p.Google Scholar
  29. KINSMAN, D.J.J., 1969, Modes of formation, sedimentary associations, and diagnostic features of shallow water and supratidal evaporites:American Association of Petroleum Geologists Bulletin, v. 53, p. 830–840.Google Scholar
  30. KHARAKA, Y.K., and THORDSEN, J.J., 1992, Stable isotope geochemistry and origin of waters in sedimentary basins,in N. Clauer and S. Chaudhuri, eds., Isotopic Signatures and Sedimentary Records. Springer-Verlag, New York, p. 411–466.CrossRefGoogle Scholar
  31. KOLKAS, M.M. and FRIEDMAN, G.M., 1998, Diagenetic history and geochemistry of the Beekmantown-Group Dolomites (Sauk Sequence) of New York, USA:Carbonates and Evaporites, v. 13, no. 1, p. 69–85.CrossRefGoogle Scholar
  32. LAND, L.S., 1980, The isotopic and trace element geochemistry of dolomite: the state of art: Society of Economic Paleontologist and Mineralogist Special Publication, v. 28, p. 87–110.Google Scholar
  33. LAND, L.S., 1985, The origin of massive dolomite:Journal of Geological Education, v. 33, p. 112–125.Google Scholar
  34. LARSEN, H., 1980, Ecology of hypersaline environments, p. 23–29in A. Nissenbaun, ed., Hypersaline brines and evaporitic environments. Elsevier Scientific Publishing Company, Amsterdam, 270 p.CrossRefGoogle Scholar
  35. LEVIN, H.L., 1996, The Earth through time. Saunders College Publishing, fifth edition, 607 p.Google Scholar
  36. LOGVINENKO, N.V., 1982, Origin of glauconite in the recent bottom sediments of the oceans:Sedimentary Geology, v. 31, p. 43–48.CrossRefGoogle Scholar
  37. MACGREGOR, D.S. and MOODY, R.T.J., 1998, Mesozoic and Cenozoic petroleum systems of North Africa,in D.S. MacGregor, R.T.J. Moody, and D.D. Clark-Lowes, eds., Petroleum Geology of North Africa. Geological Society Special Publication, London, v. 132, p. 201–216.Google Scholar
  38. MACHEL, H.G., and ANDERSON, J.H., 1989, Pervasive subsurface dolomitization of the Nisku Formation in Central Alberta:Journal of Sedimentary Petrology, v. 59, p. 891–911.Google Scholar
  39. MAZZULLO, S.J., 2000, Organogenic dolomitization in peritidal to deep sea sediments:Journal of Sedimentenary Research, v. 70, 10–23.CrossRefGoogle Scholar
  40. McCRAE, S.G., 1972, Glauconite:Earth Science Reviews, v. 8, p. 397–440.CrossRefGoogle Scholar
  41. METWALLI, M.H. and ABD EL-HADY, Y.E., 1975, Petrographic characteristics of oil-bearing rocks in Alamein oil field: significance of source reservoir relations in North Western Desert, Egypt:American Association of Petroluem Geologists Bullitin, v. 59, no. 3, p. 510–523.Google Scholar
  42. MOUNTJOY, E.W. and AMTHOR, J.E., 1994, Has burial dolomitization come of age? Some answers from the western Canada Sedimentary Basin,in B. Purser, M. Tucker, and D. Zenger, eds., Dolomites: A Volume in Honour of Dolomieu: International Association of Sedimentologists Special Publication, no. 21, p. 203–229.Google Scholar
  43. NADJIWON, L. and MORROW, W.D., 2001, Brecciation and hydrothermal dolomitization of the Middle Devonian Dunedin, Keg River, and Slave Point formations of Northeastern British Columbia, Canada: Canadian Society of Petroleum Geologists, Rock the Foundation Convention, June 18–22.Google Scholar
  44. ODIN, G.S. and FULLAGAR, P.D., 1988, Geological significance of the glaucony facies,in G.S. Odin, ed., Green Marine Clays. Elsevier, Amsterdam, p. 295–332.Google Scholar
  45. POSAMENTIER, H.W., JERVEY, M.T., and VAIL, P.R., 1988, Eustatic controls on clastic deposition: conceptual framework,in C.K. Wilgus, B.S. Hastings, C.G. Kendall, H.W. Posamentier, C.A. Ross, and J.C. Van Wagoner, eds., Sea Level Changes: An Integrated Approach: SEPM Special Publication, no. 42, p. 109–124.Google Scholar
  46. PURSER, B.H., TUCKER, M.E., and ZENGER, D.H., 1994, Problems, progress and future research concerning dolomites and dolomitization: Special Publication International Association of Sedimentologists, v. 21, p. 3–20.Google Scholar
  47. QUING, H., and MOUNTJOY, E. W., 1994, Formation of coarsely crystalline, hydrothermal dolomite reservoirs in the Presqu’ile barrier, Western Canada Sedimentary Basin:American Association of Petroleum Geologists Bulletin, v. 78, p. 55–77.Google Scholar
  48. RYLAND, J.S., 1970, Bryozoans, Hutchinson, London, 175 p.Google Scholar
  49. SAID, R., 1962, The Geology of Egypt. Elsevier Publishing Company, New York, 377 p.Google Scholar
  50. SESTINI, G., 1995, Regional Petroleum Geology of the World, Part II, Egyptin H. Kulke, ed., Africa, America, Australia and Antarctica, der Borntraeger, Berlin-Stuttgart, p. 57–87.Google Scholar
  51. SIBLEY, D.F., 1982, The origin of common dolomite fabrics, clues from the Pliocene:Journal of Sedimentary Petrology, v. 52, p. 1087–1100.Google Scholar
  52. SIBLEY, D.F. and GREGG, J.M., 1987, Classification of dolomite rock textures:Journal of Sedimentary Petrology, v. 57, p. 967–975.Google Scholar
  53. SIBLEY, D.F., GREGG, J.M., BROWN, R.G., and LAUDON, P.R., 1993, Dolomite crystal size distribution,in R. Rezak and D.L. Lavoie, eds., Carbonate Microfabrics. Springer-Verlag, New York, p. 195–204.Google Scholar
  54. SUITS, N.S. and WILKIN, R.T., 1998, Pyrite formation in the water column and sediments of Ameromictic Lake:Geology, v. 26, no. 12, p. 1099–1102.CrossRefGoogle Scholar
  55. TEXTORIS, D.A., 1969, Supratidal origin of Appalachian Basin Dolostone (abstract):Geological Society of America Special Paper, no. 121, p. 470–471.Google Scholar
  56. VAIL, P.R., HARDENBOL, J., and TODD, R.G., 1984, Jurassic unconformities, chronostratigraphy and sea-level changes from seismic stratigraphy and biostratigraphy,in J.S. Schlee, ed., Interregional Unconformities and Hydrocarbon Accumulation. AAPG Memoir, no. 36, p. 1129–1144.Google Scholar
  57. VAIL, P.R., AUDEMARD, F., BOWMAN, S.A., EISNER, P.N., and PEREZ-CRUZ, C., 1991, The stratigraphic signatures of tectonics, eustacy and sedimentology — an overview,in G. Einsele, W. Ricken, and A. Seilacher, eds., Cycles and Events in Stratigraphy. Springer-Verlag, Berlin, p. 617–659.Google Scholar
  58. VAN HOUTEN, F.B. and PURUCKER, M.E., 1985, On the origin of glauconite and chamositic granules:Geomarine Letters, v. 5, p. 47–49.Google Scholar
  59. ZEIN EL DIN, M.Y., MATBOULY, S.I., MOUSSA, S.M., and KHALIK, M.A., 1990, Geochemistry and oil-oil correlations in the Western Desert: Proceedings of the 10th Egyptian Petroleum Conference, Abstract.Google Scholar
  60. ZENGER, D.H., 1972, Significance of supratidal dolomitization in the geologic record:GSA Bulletin, v. 83, p. 1–12.CrossRefGoogle Scholar
  61. ZENGER, D.H. and DUNHAM, J.B., 1988, Dolomitization of Siluro—Devonian limestones in a deep core (5350 m), southeastern New Mexicoin V. Shukla and P.B. Baker, eds., Sedimentology and Geochemistry of Dolostones. SEPM Special Publication, no. 43, p. 161–173.Google Scholar

Copyright information

© Springer 2006

Authors and Affiliations

  • Rifai I. Rifai
    • 1
  • Mossbah M. Kolkas
    • 2
    • 3
  • Hanafy M. Holail
    • 4
  • Khaled A. Khaled
    • 5
  1. 1.Environmental Studies & Research InstituteMinufiya UniversitySadat CityEgypt
  2. 2.Department of Natural SciencesBard Early College of Staten Island of the City University of New York (CUNY)New YorkUSA
  3. 3.Department of Engineering Science and PhysicsCollege of Staten Island of the City University of New York (CUNY)New YorkUSA
  4. 4.Department of Geology, Faculty of ScienceAlexandria UniversityAlexandriaEgypt
  5. 5.Department of Geology, Faculty of ScienceHelwan UniversityCairoEgypt

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