Heat Flow Anomalies from the Spectral analysis of Airborne Magnetic data of Nupe Basin, Nigeria

Nwankwo, Levi I.; Olasehinde, Peter I.; Akoshile, C. O.

doi:10.3923/ajes.2011.20.28

Cited by 31 publications

(45 citation statements)

References 5 publications

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“…The study area is characterized by shallow depth to the basement surface where the sedimentary cover ranges from (1 to 4 km) this led to the Curie point depth in the study area is not deep but considered as a shallow or intermediate region with depths ranges between 14 and 26 km in the southern part of the study area. This region is characterized by shallow earthquake depths and shallow Curie point depth about 16-18 km and high heat flow (112 mW/m 2 where this heat flow is the primary observable parameter in the geothermal exploration and high heat flow is corresponding to volcanic and metamorphic regions since these two units have high heat conductivities (Nwankwo et al, 2011). Generally, the shallow depths to Curie isotherm and the shallow earthquakes depths indicate that Eastern shore of the Gulf of Suez is a promising area for further geothermal exploration.…”

Section: Seismicity and Seismic Activity Of The Study Areamentioning

confidence: 99%

Determination of sedimentary cover and structural trends in the Central Sinai area using gravity and magnetic data analysis

Selim

Aboud

2012

Journal of Asian Earth Sciences

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Section: Seismicity and Seismic Activity Of The Study Areamentioning

confidence: 99%

Determination of sedimentary cover and structural trends in the Central Sinai area using gravity and magnetic data analysis

Selim

Aboud

2012

Journal of Asian Earth Sciences

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“…The plots of the logarithms of the energy spectra (Log E) against the domain frequencies were made. The gradients ( and ) of two linear segments drawn from each graph were used to estimate the centroid depth ( ), the depth to top boundary (Z ), Curie point depth ( ), geothermal gradient ( ) and heat flow (q) using the relations shown in equations 3 -7 respectively [16][17][18][19]8]:…”

Section: Estimation Of Curie Point Geotheral Gradient and Heat Flow mentioning

confidence: 99%

“…The Nigerian sector of Chad basin has been identified to have high prospect for geothermal energy [3][4]. But only few works have investigated geothermal parameters in the Nigerian sector of Chad basin [5][6][7][8][9][10][11][12]. In addition, these works used data from oil wells.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Geothermal Gradient and Heat Flow for Determination of Geothermal Energy Sources in Monguno Area of Northeastern Nigeria

Udochukwu

Akiishi

Tyovenda

2019

JGEESI

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The aeromagnetic data of Monguno area northeastern Nigeria have been used to estimate Curie point depth, geothermal gradients and heat flow using spectral analysis. These geothermal parameters were subsequently employed to identify areas of geothermal resources. First order polynomial fitting was applied in Regional-residual separation. The Curie point depth obtained in this area ranges from 10.318 to 24.476 km with an average of 13.387 km, the geothermal gradient of the area varies from 23.697 to 56.212°C /km, with an average of 46.195°C /km, while the heat flow ranges from 59.242 to 136.176 mWm-2, with an average value of about 112.364 mWm-2. It was also observed that the deepest Curie depth in the area is identified in the south, while the shallow depth is located in the northeast and spread toward the southwest. On the other hand, the highest geothermal gradient in the area is identified in the northern part of Moguno, while in the south, the lowest, geothermal gradient is located. The highest heat flow in the area is seen in the south-west and north-east, while the lowest heat flow is observed in the south. The high heat flow and geothermal gradient in the area show that geothermal energy could be found in Monguno region of the northeastern Nigeria.

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“…These problems include: provision of the third dimension to surface mapping and sampling, delineation of structures and alteration under a cover of overburden or water, geothermal exploration, research on radioactive heat, hydrocarbon survey, magnetic and radiometric minerals investigation using cost effective airborne measurements. Recent works by Nwankwo et al [20] and Nwankwo et al [21] have shown great potential for geothermal heat flow in the Bida basin. Hence, this study involves the interpretation of aeromagnetic and aeroradiometric data so as to determine the geothermal heat flow and radioactive heat features of the study area.…”

Section: Introductionmentioning

confidence: 99%

Geothermal and radioactive heat studies of parts of southern Bida basin, Nigeria and the surrounding basement rocks

Megwara¹,

Udensi²,

Olasehinde³

et al. 2012

International Journal of Basic and Applied Sciences

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Aeromagnetic and aeroradiometric data covering parts of southern Bida basin, Nigeria and the surrounding basement rocks were processed and interpreted. The research covered both basin and basement rock sections, and was aimed at determining the geothermal heat flow and radioactive heat characteristics of the survey area. The number of data points used for analysis were 2,937, obtained from the digitization of eleven ½ degrees by ½ degrees contour maps. Data processing methods used in the study include determination of heat from radiometric data, regional-residual separation of the total magnetic intensity data, determination of depth-to-top and depth-to-bottom of magnetic sources and estimation of field scaling exponent using the Fractal technique. The research results gave geothermal heat flow values ranging from 69.167 mWm -2 to 124.821 mWm -2 with an average value of 90.959 mWm -2 and radioactive heat values ranging from 0.91 to 4.53 µW/m 3 with an average value of 2.28 µW/m 3 . Deductions made from the survey are, the field scaling exponent varies linearly with depth of downward continuation and Katakwa is a prospect area for geothermal heat.

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Heat Flow Anomalies from the Spectral analysis of Airborne Magnetic data of Nupe Basin, Nigeria

Cited by 31 publications

References 5 publications

Determination of sedimentary cover and structural trends in the Central Sinai area using gravity and magnetic data analysis

Determination of sedimentary cover and structural trends in the Central Sinai area using gravity and magnetic data analysis

Estimation of Geothermal Gradient and Heat Flow for Determination of Geothermal Energy Sources in Monguno Area of Northeastern Nigeria

Geothermal and radioactive heat studies of parts of southern Bida basin, Nigeria and the surrounding basement rocks

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