Volume 3, Issue 4, July 2018, Page: 69-81
Determination of Curie Depth Isotherm and Geothermal Studies over Parts of Nasarawa and Environs, North Central Nigeria
Rowland Akuzigi Ayuba, Department of Geology, Moddibbo Adama University of Technology Yola, Yola, Nigeria
Ahmed Nur, Department of Geology, Moddibbo Adama University of Technology Yola, Yola, Nigeria
Received: Apr. 23, 2018;       Accepted: May 17, 2018;       Published: Sep. 25, 2018
DOI: 10.11648/j.ijees.20180304.11      View  289      Downloads  18
Abstract
The high resolution aeromagnetic data was analyzed to estimate depths to the bottom of magnetic sources as proxy information about the thermal conditions within the crust in Nasarawa area. This area is particularly important for geothermal exploration because of its high heat flow and geothermal gradients. The result of this investigation revealed that Curie point depth vary between 18km and 23km with deeper Isotherm at the northwestern part and shallow Isotherm at the south eastern part, this means that the Curie Isotherm surface around Awe Dorowa and Akiri may likely coincide with the Moho, these variations of curie depth isotherm could be related to the different tectonic activities, which involve astenospheric updoming, crustal thinning and stretching, emplacement of igneous bodies and block faulting in the Benue Trough. The calculated heat flow varies between 63 mWm-2- 80 mWm-2 and geothermal gradient varies between 25°C/km- 32°C/km. The south eastern part is characterized by high heat flow (80mW/m2), and shallow Curie depth (18 km), due to the geothermic nature of the area, the heat due to magmatic activities as well as heat from thinning of the crust is responsible for raising the temperature in these areas. The north western portion of the studied area has lower heat flow (63mW/m2) and deeper Curie depth (23 km) due to Isostacy. Variations in the Curie Depth compare reasonably well with the heat flow and with the Geothermal Gradient, this study also revealed that the south eastern part of the study area has potentials for geothermal energy.
Keywords
High Resolution Aeromagnetic Data, Curie Point, Geothermal Energy, Akiri
To cite this article
Rowland Akuzigi Ayuba, Ahmed Nur, Determination of Curie Depth Isotherm and Geothermal Studies over Parts of Nasarawa and Environs, North Central Nigeria, International Journal of Energy and Environmental Science. Vol. 3, No. 4, 2018, pp. 69-81. doi: 10.11648/j.ijees.20180304.11
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Bhattacharryya, B. K. and L. K. Leu. (1975). Spectral Analysis of Gravity and Magnetic Anomalies due to Dimensional Structures, Geophysics, Vol. 40, pp. 993-1031.
[2]
Bhattachryya, B. K. (1996). Continuous spectrum of the total magnetic field anomaly due to a rectangular prismatic body. Geophysics Vol. 31; 97–121.
[3]
Benkhelil, J. (1989): The Origin and evolution of the Cretaceous Benue Trough, Nigeria. Jo urnal of 4/rican Earth Sciences 8, 251-282.
[4]
Byerly, P. E. and Stolt, R. H. (1977). An attempt to define the Curie Point Isotherm in Northern and Central Arizona, Geophysics, Vol. 42, pp. 1394-1400.
[5]
Blakely, R. J. (1988). Curie temperature, Isotherm Analysis and Tectonic Implications of Aeromagnetic Data from Nevada. Journal of Geophysical Research-Solid Earth, Vol. 93, pp. 11817-11832.
[6]
Burke KC, Dewey JF (1972) Orogeny in Africa. In: Dessauvagie TFJ, Whiteman AJ (eds), Africageology. University of Ibadan Press, Ibadan, pp 583–608.
[7]
Connard, G., Couch, R. and Gempererie, M. (1983). Analysis of Aeromagnetic measurement from the Cascade Range in Central Oregon, Geophysics, Vol. 48, pp. 376-390.
[8]
Dobrin, M., & Savit, C. (1988). Introduction To Geophysical Prospecting (Fourth Edition ed.). Singapore: McGraw-Hill.
[9]
Dolmaz, M. N., Z. M. Hisarli., T. Ustaomer, and Orbay, N. (2005). Curie Points Depths based on Spectrum Analysis of the Aeromagnetic Data, West Anatolian Extensional Province, Turkey, Pure and Appl. Geol, Vol. 162, pp. 571-590.
[10]
Ford, S. O. (1981): The Economic Mineral Resources of the Benue Trough. Earth Evolution Sciences Vol. 1, No. 2, pp154-163.
[11]
Hisarli, ZM (1996). Determination of Curie Point Depths in Western Anatolia and Related with the Geothermal Areas, Ph. D. Thesis, Istanbul University, Turkey (unpubl.), (in Turkish with English abstract).
[12]
Johnson, W. W. (1969). A least - Squares method of interpreting magnetic anomalies caused by Two- Dimensional structures. Geophysics, Vol. 34, pp65 -74.
[13]
Kasidi, S. and Nur, A. (2012) Curier isotherm deduced from spectral analysis over Sarti and environs north eastern Nigeria. Scholarly Journals of Biotechnology. Vol. 1 (3): 49–56.
[14]
Nigerian Geological Survey Agency Abuja, 2006. Geological map of Nigeria, scale: 1:2,000,000.
[15]
Nigerian Geological Survey Agency Abuja. 2009. High Resolution HRAM Airborne Geophysical Series Survey Grid Map of Total Intensity (16 sheets). Scale 1: 100,000.
[16]
Nur, A., Ofeogbu, C. O. and Onuoha, K. M. (1999). Estimation of the depth to the courier point isotherm in the upper Benue trough, Nigeria. Jour. Min. Geol. 35 (1): 53–60.
[17]
Nuri, DM, Timur, UZ, Mumtaz, H, Naci, O (2005). Curie Point Depth variations to infer thermal structure of the crust at the African-Eurasian convergence zone, SW Turkey. J. Earth planets Space. 57:373-383.
[18]
Mishra, D. C. and Naidu, P. S; 1974. Two-dimentional Power spectral analysis of aeromagnetic fields, Geophysics Prop, 22, 345–534.
[19]
Nwankwo, L. I., Olasehinde, P. I. and Akoshile, C. O. (2011). Heat flow anomalies from spectral analysis of aeromagnetic data of Nupe Basin, Nigeria. Asian Journal of Earth Sciences. pages 1–7.
[20]
Offodile. M. E. (1976). The Geology of the Middle Benue, Nigeria. Palaentological Institute, University Uppsala, Special Publication,, 4:pp 1-166.
[21]
Ofoegbu, C. O. (1984b). A model for the tectonic evolution of the Benue Trough of Nigeria. Geologische Rundschau, 73, 1007-1018.
[22]
Ofoegbu, C. O. (1985). A review of the geology of the Benue Trough of the Nigeria; Journal of African Sciences, Vol. 3 pp. 285-291.
[23]
Okubo, Y. J R. Graf, R. O. Hansen, K. Ogawa and H. Tsu. (1985). Curie point depth of the Island of Kyushu surrounding areas, Japan Geophysics. Vol. 53. pp. 481-491.
[24]
Okubo, Y., H. Tsu, and K. Ogawa, (1989) Estimation of curie point temperature and geothermal structure of island arc of Japan, Tectonophysics, 159, 279–290.
[25]
Osazuwa, I. B., Ajakaiye, D. E and Verheijn, P. J. T. (1981). Analysis of the structure part of the Benue Valley on the basis of new geophysical data Earth Evol. Sci. Vol. 2, pp. 126-135.
[26]
Ross, H. E., Blakely, R. J. and. Zoback, M. D. (2006). Testing the use of aeromagnetic data for the determination of Curie depth in California. Geophysics, Volume 71, Pages 10–16.
[27]
Salem, A., Ushijima, K., Elsirafi, A., Mizunaga, H., 2000. Spectral analysis of aeromagnetic data for geothermal reconnaissance of Quesir area, northern Red Sea. Proceedings of the World Geothermal Congress 2000, International Geothermal Association/IGA, pp. 1669–1674.
[28]
Skeels, D. C. (1967): What is Residual Gravity? Geophysics, 32: 872 -876.
[29]
Spector, A. and Grant, T. S. (1970). Statistical models for interpreting aeromagnetic data. Geophysics.
[30]
Stampolidis, A. Kane, I. Tsokas G. N. and Tsourlo P., (2005). Curie point depths of Albania Inferred from Ground Total Field Magnetic Data. Surveys in Geophysics, Vol. 26, pp. 461-480.
[31]
Tanaka, A., Okubo, Y. and matsubayashi, O. (1999). Curie point depth based on spectrum analysis of the magnetic anomaly data in east and southeast Asia. Tectonophysics. Volume 306, pages 461–470.
[32]
Trifonova, P., Zhelev, Zh., Petrova, T., Bojadgieva, K., (2006). Curie point depths of Bulgarian territory inferred from geomagnetic observations and its correlation with regional thermal structure and seismicity. Tectonophysics 473, 362–374.
[33]
Tselentis, GA (1991). An attempt to define Curie depth in Greece from Aeromagnetic and heat flow data. PAGEOPH, 136 (1):87-101.
[34]
Udensi, E. E., Osazuwa, I. B. and Daniyan, M. A. (2000). Production of a composite aeromagnetic map of the NupeBasin. Nigeria Journal of Science, Technology and Mathematics Education. Pages 150–159.
[35]
Wright, J., Hastings, D., Jones, W., & Williams, H. (1985). Geology and Mineral Resources of West Africa. London: George Allen and Unwin publishers Ltd.
[36]
Yamano, M. (1995). Recent Heat Flow Studies in and around Japan. In: Gupta, M. L. and Yamano, M. (eds), Terrestrial Heat Flow and Geothermal Energy in Asia. A. A Balkema, Rotterdam, pp. 173-200.
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