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Carbonates and Evaporites

, Volume 7, Issue 1, pp 48–55 | Cite as

Coordinated petrography-isotopic-chemical investigation of meteoric calcite cement (Jurassic-Pleistocene), Egypt

  • Hanafy Holail
Article

Abstract

Based on textural (light and cathodoluminescence microscope), isotopic (δ18O and δ13C) and chemical (Mg, Sr, Fe and Mn) data, the meteoric sparry calcite cement underwent similar diagenetic history through geologic time (Jurassic, Cretaceous, Eocene, Miocene and Recent), Egypt. Whereas, the combined geochemical variations of these cements cannot be accounted for on the basis of temperature changes and most probably reflect compositional changes of meteoric fluids. These compositional changes may reflect change in response to climatic and vegetational fluctuations, and the evolution of meteoric fluid chemistry in response to progressive water/rock interaction.

Detailed cathodoluminescence petrography of these low-Mg calcite cement shows a brightly luminescent and compositional zones with respect to Mn2+ and/or Fe2+. Such strongly zones cement was probably formed under continually fluctuating chemical condition which are most typical of meteoric fluids. Meanwhile, the very low Sr values (<60 ppm) of these cements are compatible with meteoric origin.

The stable isotopic composition of these sparry calcite cements generally follows Lohmann's (1988) meteoric water line with relatively small variations in oxygen and carbon isotopic values. The δ13C values range from +1.5 to −7.5‰ PDB, where the δ18O values from −4.2 to −11.5‰ PDB. The depletion and variation in oxygen values cannot reasonably be attributed to an increase in temperature. Carbon variations similarly must reflect changes in the source of HCO3/, from heavy marine-derived carbonate to light organic-derived bicarbonate. Finally, this trend will be attributed to increasing water/rock interaction and to isotopic evolution of the meteoric fluids during cementation.

Keywords

Calcite Jurassic Meteoric Water Cenomanian Campanian 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Allam, A. M., 1986, A regional and paleoenvironmental study on the Upper Cretaceous deposits of Bahariya Oasis, Libyan Desert, Egypt:Jour. African Earth Sci., v. 5, p. 407–412.Google Scholar
  2. Allan, J. R., andMatthews, R. K., 1982, Isotope signatures associated with early meteoric diagenesis:Sedimentology, v. 29, p. 797–817.Google Scholar
  3. Anderson, T. F., and Arthur, M. A., 1983, Stable isotopes of oxygen and carbon and their application to sedimentological and paleoenvironmental problems, Chapter Iin Arthur, M. A., Anderson, T. F., Kaplan, I. R., Veizer, J., and Land, L. S., eds., Stable Isotopes in Sedimentary Geology: SEPM Short Course no. 10, p. 1–151.Google Scholar
  4. Basta, E. Z., andAmer, H. I., 1976, The carbonate rocks in and around Bahariya Oasis depression, Western Desert, Egypt:Cairo University, Faculty of Sci. Bulletin, v. 49, p. 367–393.Google Scholar
  5. Bathurst, R. G., 1975, Carbonate Sediments and Their Diagenesis: 2nd enlarged edition, Amsterdam, Elsevier, 658 pp.Google Scholar
  6. Bathurst, R. G., 1980, Deep crustal diagenesis in limestones:Rev. Inst. Invest. Geol. Diputaction provincial univ. Barcelona, v. 34, p. 89–100.Google Scholar
  7. Binkley, K. L., Wilkinson, B. H., andOwen, E. M., 1980, Vadose beachrock cementation along a southeastern Michigan marl lake:Jour. Sedimentary Petrology, v. 50, p. 429–440.Google Scholar
  8. Brand, U., 1982, The oxygen and carbon isotope composition of Carboniferous fossil components: seawater effects:Sedimentology, v. 29, p. 139–147.CrossRefGoogle Scholar
  9. Craig, H., 1957, Isotopic standards for carbon and oxygen and correction factors for mass spectrometric analyses of carbon dioxide:Geochim. Cosmochim. Acta, v. 12, p. 133–149.CrossRefGoogle Scholar
  10. Dickson, J. A., andColeman, M. L., 1980, Changes in carbon and oxygen isotopic composition during limestone diagenesis:Sedimentology, v. 27, p. 107–118.CrossRefGoogle Scholar
  11. Donath, F. A., Carozzi, A. V., Fruth, L. S., andRich, D. W., 1980, Oomoldic porosity experimentally developed in Mississippian oolitic limestone:Jour. Sedimentary Petrology, v. 50, p. 1249–1260.Google Scholar
  12. El-Hinnawi, E. E., andLoukina, S. M., 1971, Petrography and chemistry of some Egyptian carbonate rocks:Neues Jahrb. Geology. U. Palaeont. Abh., v. 138, p. 284–312.Google Scholar
  13. Fairchild, I. J., 1983, Chemical controls of cathodoluminescence of natural dolomites and calcites: new data and review:Sedimentology, v. 30, p. 579–583.CrossRefGoogle Scholar
  14. Frank, J. R., Carpenter, A. B., andOglesby, T. W., 1982, Cathodoluminescence and composition of calcite cement in the Taum Sauk Limestone (Upper Cambrian), southeast-Missouri:Jour. Sedimentary Petrology, v. 52, p. 631–638.Google Scholar
  15. Ghorab, M. A., andIsmail, M. M., 1969, Microfacies of the Abu Roash surface sections:Bulletin of the Faculty of Science, Alexandria Univ., v. IX, p. 331–363.Google Scholar
  16. Gindy, A. R., andEl-Askary, M. A., 1969, Stratigraphy, structure and origin of Siwa Depression, Western Desert of Egypt:Am. Assoc. Petroleum Geologists Bulletin, v. 53, p. 603–635.Google Scholar
  17. Given, R. K., andLohmann, K. C., 1985, Derivation of the original isotopic composition of Permian marine cements:Jour. Sedimentary Petrology, v. 55, p. 430–439.Google Scholar
  18. Holail, H., and Lohmann, K. C., 1986, The role of early lithification on development of chalky porosity in calcitic micrite: Upper Cretaceous chalks, Egypt (Abs.): SEPM Mid-year Meeting, p. 53.Google Scholar
  19. Holail, H., Lohmann, K. C., and Sanderson, I., 1988, Dolomitization and dedolomitization of Upper Cretaceous carbonate, Bahariya Oasis, Egypt,in Shukla, V., and Baker, P., eds., Sedimentology and Geochemistry of Dolostones: SEPM, Spec. Pub. no. 43, p. 191–208.Google Scholar
  20. Issawi, B., 1972, Review of Upper Cretaceous-Lower Tertiary stratigraphy in central and southern Egypt:Am. Assoc. Petroleum Geologists Bulletin, v. 56, p. 1448–1463.Google Scholar
  21. James, N. P., andChoquette, P. W., 1984, Diagenesis 9—limestones— the meteoric diagenetic environment:Geosci. Canada, v. 11, p. 161–194.Google Scholar
  22. Lahann, R. W., 1978, A chemical model for calcite crystal growth and morphology control:Jour. Sedimentary Petrology, v. 48, p. 337–344.Google Scholar
  23. Lohmann, K. C., 1988, Geochemical patterns of meteoric diagenetic systems and their application to studies of paleokarst,in James, N. P., and Choquette, P. W., eds., Paleokarst. Springer-Verlag, New York, p. 58–80.CrossRefGoogle Scholar
  24. Lohmann, K. C., andWalker, C. G., 1989, The k180 record of Phanerozoic abiotic marine calcite cements:Geophysical Research Letters, v. 16, no. 4, p. 319–322.CrossRefGoogle Scholar
  25. Longman, M. W., 1980, Carbonate diagenetic textures from nearsurface diagenetic environments:Am. Assoc. Petroleum Geologists Bulletin, v. 64, p. 461–487.Google Scholar
  26. Machel, H. G., 1985, Cathodoluminescence in calcite and dolomite and its chemical interpretation:Geosci. Canada, v. 12, p. 139–147.Google Scholar
  27. Marshall, J. D., andAshton, M., 1980, Isotopic and trace element evidence for submarine lithification of hardgrounds in the Jurassic of eastern England:Sedimentology, v. 27, p. 271–289.CrossRefGoogle Scholar
  28. Meyers, W. J., and Lohmann, K. C., 1985, Isotope geochemistry of regionally extensive calcite cement zones and marine components in Mississippian limestones, New Mexico,in Schneidermann, N., and Harris, P. M., eds., Carbonate Cements. SPEM Spec. Pub. no. 36, p. 223–239.Google Scholar
  29. Moore, C. H., 1985, Upper Jurassic subsurface cements: a case history,in Schneidermann, N., and Harris, P. M., eds., Carbonate Cements. SPEM Spec. Pub. no. 36, p. 291–308.Google Scholar
  30. Moore, C. H., 1989, Carbonate Diagenesis and Porosity: Developments in Sedimentology no. 46, Amsterdam, Elsevier, 338 p.Google Scholar
  31. Nichel, E., 1978, The present status of cathodoluminescence as a tool in sedimentology:Miner. Sci. Eng., v. 10, p. 73–100.Google Scholar
  32. Pierson, B. J., 1981, The control of cathodoluminescence in dolomite by iron and manganese:Sedimentology, v. 28, p. 601–610.CrossRefGoogle Scholar
  33. Said, R., 1962, The Geology of Egypt: Elsevier, Amsterdam, 377 p.Google Scholar
  34. Salem, R., 1976, Evolution of Eocene-Miocene sedimentation patterns in parts of northern Egypt:Am. Assoc. Petroleum Geologists Bulletin, v. 60, p. 34–64.Google Scholar
  35. Sandberg, P. A., 1983, An oscillating trend in Phanerozoic nonskeletal carbonate mineralogy:Nature, v. 305, p. 19–22.CrossRefGoogle Scholar
  36. Selim, A., 1977, Diagenesis of the Middle Miocene limestones of the Salum area, Western Desert, Egypt:Bull. Faculty of Science, King Abd El-Aziz University, Saudi Arabia, v. 1, p. 129–144.Google Scholar
  37. Soliman, S. M., andEl Badry, O. A., 1980, Petrology and tectonic framework of the Cretaceous, Bahariya Oasis, Egypt:Egypt. Jour. Geology, v. 24, p. 11–51.Google Scholar
  38. Ten Have, T., andHeijnen, W., 1985, Cathodoluminescence activation and zonation in carbonate rocks: an experimental approach:Geol. Mijnbouw, v. 64, p. 297–310.Google Scholar
  39. Veizer, J., Fritz, P., andJones, E., 1986, Geochemistry of brachiopods: oxygen and carbon isotopic records of Paleozoic oceans:Geochim. Cosmochim. Acta, v. 50, p. 1679–1696.CrossRefGoogle Scholar
  40. Youssef, M. H., 1986, Sedimentological, biostratigraphical and geochemical studies of the Jurassic rocks in Gebel El Maghara area, North Sinai: Ph. D. Thesis, Cairo University, Faculty of Science, 220 p.Google Scholar

Copyright information

© Springer 1992

Authors and Affiliations

  • Hanafy Holail
    • 1
  1. 1.Geology DepartmentAlexandria UniversityAlexandriaEgypt

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