TEXTURAL ANALYSIS AND HYDRAULIC CHARACTERISTICS OF AJALI SANDSTONES OF UGBENE-AJIMA AND ENVIRONS IN ANAMBRA BASIN, SOUTHEASTERN, NIGERIA
Abstract
This study highlights the textural characteristics and hydraulic conductivity of sandstones of Ajali Sandstone in Ugbene-Ajima area (southeastern Nigeria). The investigation approach involved field sampling and collection of 8 sandstone samples from different outcrop locations followed by laboratory studies such as sieve analysis. Sieve analysis and textural studies show that the sandstones range of 0.647-1.616. Other parameters such as coefficient of uniformity (Cu) range from -27.5 to 6.83 (av. -10.25), while standard deviation (sorting) values of 0.603-1.022 (av. 0.972) imply moderately well sorted sediments. The sandstones are mostly platykurtic and negatively skewed indicating sand of fluvial origin ranging from channel floor, point bar to braided rivers, also suggesting moderately to high/turbulent energy conditions with presence of winnowing actions. The Ajali Sandstone porosity values range from 2%-54% (av. 28.312) and the hydraulic conductivity values of 16.89-103.06 (av. 45.87). These values of porosity and hydraulic conductivity are indications of high specific yield for the sandstone which release economic water quantity.
Keywords:
Textural analysis, Depositional Environment, Hydraulic Conductivity, AquiferDownloads
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Copyright (c) 2024 Ezike, Ejiofor Chinedu , Aganigbo, Chigozie Ignatius
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References
Akande, S. O., & Erdtmann, B. D. (1998). Burial metamorphism (Thermal maturation) in Cretaceous sediments of the Southern Benue Trough and Anambra Basin, Nigeria. American Association of Petroleum Geologists Bulletin, 82, 1191-1206.
Ayodele, O. S., & Madukwe, H. J. (2019). Granulometric and sedimentologic study of beach sediments, Lagos, Southwestern Nigeria. International Journal of Geosciences, 10(3), 295-316.
Benkhelil, J. (1989). The origin and evolution of the Cretaceous Benue Trough (Nigeria). Journal of African Earth Sciences (and the Middle East), 8, 251-282.
Blott, S. J., & Kenneth, P. (2000). Gradistat: A grain size distribution and statistics package for the analysis of unconsolidated sediments. Earth Surface Processes and Landforms, 26, 1237-1248.
Duane, D. B. (1964). Significance of skewness in recent sediments, Western Pamlico Sound, North Carolina. Journal of Sedimentary Petrology, 34, 864-874.
Fetter, C. W. (1994). Applied hydrogeology (3rd ed.). Macmillan College Publishing Company.
Fetter, C. W. (2001). Applied hydrogeology (4th ed.). Prentice Hall.
Folk, R. L., & Ward, W. C. (1957). Brazos River bar: A study of the significance of grain size parameters. Journal of Sedimentary Petrology, 27(1), 3-26.
Freeze, R. A., & Cherry, J. A. (1979). Groundwater. Prentice-Hall.
Friedman, G. M. (1961). Dynamic processes and statistical parameters compared for size frequency distribution of beach and river sands. Journal of Sedimentary Petrology, 37, 327-354.
Hamill, L., & Bell, F. U. (1986). Groundwater resources development. Britain Library Cataloguing in Publication Data London, 151-158.
Hazen, A. (1892). Some physical properties of sands and gravels, with special reference to their use in filtration. 24th annual report, Massachusetts State Board of Health, Pub. Doc., 34, 539-556.
Ladipo, K. O., Nwajide, C. S., & Akande, S. O. (1992). Cretaceous and Paleogene sequences in the Abakaliki and Anambra basins. Presented at the National Symposium on Geology of Deltas, Port Harcourt, May 1992.
Miola, R. J., & Weiser, D. (1968). Textural parameters: An evaluation. Journal of Sedimentary Petrology, 38, 45-53.
Murat, R. C. (1972). Stratigraphy and palaeogeography of the Cretaceous and Lower Tertiary in southern Nigeria. African Geology, 251-266.
Nwajide, C. S. (2013). Geology of Nigeria's sedimentary basins. CSS Bookshops Limited.
Obasi, P. N., Aghamelu, O. P., & Akudinobi, B. E. B. (2013). Determination of hydraulic conductivity of sandstones of Ajali Formation in Uturu Area (Southeastern Nigeria) using grain size analysis. Journal of Natural Sciences Research, 3(3), 49-54.
Obi, G. C. (2000). Depositional model for the Campanian-Maastrichtian succession, Anambra Basin, Southern Nigeria. Unpublished Ph.D. thesis, University of Nigeria, Nsukka, 291.
Obi, G. C., Okogbue, C. O., & Nwajide, C. S. (2001). Evolution of the Enugu Cuesta: A tectonically driven erosional process. Global Journal of Pure and Applied Sciences, 7(2), 321-330.
Oboh-Ikuenobe, F. E., Obi, C. G., & Jaramillo, C. A. (2005). Lithofacies, palynofacies, and sequence stratigraphy of Palaeogene strata in Southeastern Nigeria. Journal of African Earth Sciences, 41, 79-101.
Ofomata, G. E. K. (Ed.). (1978). Relief and drainage in the Nsukka Environment. Fourth Dimension Publishers, 58-68.
Pettijohn, F. J. (1975). Sedimentary rocks (2nd ed.). Harper and Row Publishers.
Sahu, B. K. (1964). Depositional mechanisms from the size analysis of clastic sediments. Journal of Sedimentary Petrology, 34, 73-83.
Todd, D. K. (1980). Groundwater hydrology (2nd ed.). John Wiley and Sons.
Vukovic, M., & Soro, A. (1992). Determination of hydraulic conductivity of porous media from grain-size distribution. Water Resources Publications, LLC.
