Estimation of curie isotherm and heat flow of eastern Chad basin, Nigeria from spectral analysis of Aeromagnetic data

Anakwuba, Emmanuel; Okeke, H. C.; Chinwuko, Ifeanyi; Onyekwelu, Clement

doi:10.1190/ice2016-6338122.1

Cited by 5 publications

(4 citation statements)

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“…The curie point depths, range from 7.63km to 34.52km, with a mean value of 14.79km, geothermal gradient, range from 16.80 0 C km -1 to 75.97 0 C km -1 , with a mean value of 45.70 0 C km -1 and heat flow, range from 42.01 mWm -2 to 189.94 mWm -2 , with a mean value of 114.26 mWm -2 . The curie point depth of the study area compare favourably with what was recorded over Sarti and environs of North-Eastern Nigeria (range from 24 to 28km, Kasidi and Nur (2012)), Jalingo and Environs, North-Eastern part of Nigeria (range from 26 to 28km, Kasidi and Nur (2013)), the eastern Chad basin, Nigeria ((Mafa -Bama and Maiduguri -Gwoza areas) (range from 21 to 32 km , Anakwuba, et al, (2016))), the entire Bida Basin in north-central Nigeria (range from 16 to 30 km, Nwankwo and Sunday (2017)), part of the upper Benue trough corresponding to Kaltungo, Guyok, Lau and Dong areas, north eastern Nigeria (range from 12 to 34 km, Mohammed et al, (2019)) and the Upper Benue Trough (range from 24 to 33km, Nur et al, (1999)). .…”

Section: Resultssupporting

confidence: 67%

Investigation of Geothermal Energy Potential of Parts of Central and North-Eastern Nigeria Using Spectral Analysis Technique

Odidi

Mallam²,

Nasir³

2020

FJS

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The current study deals with an estimate of the Curie point depth, heat flow and geothermal gradient from spectral analysis of aeromagnetic data covering an area located approximately between latitude 7.5o N to 11.5o N and longitude 7.5o E to 10.5o E, which corresponds to parts of the Benue trough (lower part of the Upper Benue trough, the entire middle Benue trough, and upper part of the Lower Benue trough), lower part of the Gongola and Yola Basins, the Precambrian Basement, the Jurassic Younger Granites and two prominent hot Springs, Wiki hot spring in Bauchi state (in the north-eastern part) and Akiri hot spring in Nasarawa state (in the south-western part) of central and north-eastern Nigeria. Radially power spectrum was applied to the aeromagnetic data of the study area divided into 48 square blocks and each block analysed using the spectral centroid method to obtain depth to the top, centroid and bottom of magnetic sources. The depth values were subsequently used to evaluate the Curie-point depth (CPD), geothermal gradient and near-surface heat flow in the study area. The values of the curie point depths (Zb), range from 7.6341 km to 34.5158 km, with a mean value of 14.7928km, geothermal gradient, range from 16.8039 0C km-1 to 75.97490C km-1, with mean value of 45.7021 0C km-1 and heat flow (q), range from 42.0097 mWm-2 to 189.9372mWm-2, with a mean value of 114.2554mWm-2. Which reveals that, there might probably be good sources for geothermal and thereby further recommended for detailed geothermal exploration.

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Section: Resultssupporting

confidence: 67%

Investigation of Geothermal Energy Potential of Parts of Central and North-Eastern Nigeria Using Spectral Analysis Technique

Odidi

Mallam²,

Nasir³

2020

FJS

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“…lower CPD values betray high geothermal potential of an area. Spectral analyses of aeromagnetic anomalies have been applied to estimate CPD and heat flow of eastern Chad Basin, Nigeria by Anakwuba, et al [39]. Their estimated CPD varied between 21.45 km at the Mafa -Bama area and 31.52 km at the Maiduguri -Gwoza area of the region.…”

Section: Geochemistrymentioning

confidence: 99%

Review of Geothermal Energy Research in Nigeria: The Geoscience Front

Michael¹,

Edet²

2017

Int J Earth Sci Geophys

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We review geo-scientific research in Nigeria on geothermal energy prospecting. Nigeria's challenging energy needs is overwhelming, with demand exceeding generation. There is inequitable access by the populace to the meager and unstable electricity services in the country. With the main power generating source being gas-fired thermal power stations and despite her increasing population of over 170 million, Nigeria energy generation capacity dwindle to a record low of 2800 MW in year 2016. Alternative energy sources (preferably renewable) promises some form of relief to the current energy challenge. We focus on geothermal resources for the purpose of this study. A direct need in Nigeria for application of geothermal energy is the production of electricity and with numerous geothermal energy potential sites in the country, showing surface heat manifestations; the geothermal energy option presents an attractive and cheaper alternative energy source for Nigeria. In this review, we examine the various research conducted towards establishing useful information for stake holders to enable proper assessment, exploration and exploitation of geothermal energy resources in Nigeria.

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“…Unfortunately, we don't have precise data regarding the thermal conductivity of deep-seated rocks. By combining equations (6) and equation (7), the relationship between depth to the bottom of the magnetic sources and heat flow (Q) can be established thus;…”

Section: Geothermal Parameters Estimation: Heat Flow and Geothermal G...mentioning

confidence: 99%

“…The results suggest heat flow ranging between 30 and 120 mWm −2 , while geothermal gradient ranges from 10 and 45 • C/km in southern part of Nupe Basin. Some studies have also been conducted in different parts of Nigeria [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Geothermal resource potentials estimation from the interpretation of aeromagnetic data over parts of Southwestern Nigeria

Ike,

Oniku,

Ezike

et al. 2024

Afr. Sci. Rep.

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In a bid to explore unconventional electricity generation sources and reduce effects of fossil fuels, this study evaluates geothermal resource potentials over parts of Southwestern Nigeria, precisely depth to the bottom of magnetic source (DBMS), heat flow, geothermal gradient and their relationships. Regional-residual anomaly separation was conducted, and spectral analysis was applied on the residual anomaly component of 14 aeromagnetic data sheets. Depth to the bottom of magnetic source varies between 1.87 and 6.26 km, with average value of 3.50 km, heat flow varies between 23.18 and 77.38 mWm−2, with average value of 43.79 mWm−2, while geothermal gradient varies between 9.27 and 30.95 oC/km with average value of 17.52 oC/km. Northcentral region has the highest heat flow (77.4 mWm−2), followed by Northeast (68.3 mWm−2), Southwest has the least (< 40.0 mWm−2) while Southeast has values in between the extremes. A comparison between the average heat flow and that of ‘thermally stable’ continental regions of the world (60 or 65) mW/m2 gives 72.98 or 67.37% respectively. The estimated heat is probably from mantle plumes, radioactive sources or heat generated from pressures within basements that are overlaid by thick thermally insulated sediments, hence hot magmatic fluid flows into fractured basement and cause hydrothermal alterations of surrounding rocks. Since most geodynamic operations depends on thermal structure of the earth’s crust, the result of this study has undoubtedly contributed significantly to the body of existing thermal knowledge and closed the information gap regarding crustal temperature distribution at depth in Southwest part of Nigeria and Nigeria in general.

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Estimation of curie isotherm and heat flow of eastern Chad basin, Nigeria from spectral analysis of Aeromagnetic data

Cited by 5 publications

References 0 publications

Investigation of Geothermal Energy Potential of Parts of Central and North-Eastern Nigeria Using Spectral Analysis Technique

Investigation of Geothermal Energy Potential of Parts of Central and North-Eastern Nigeria Using Spectral Analysis Technique

Review of Geothermal Energy Research in Nigeria: The Geoscience Front

Geothermal resource potentials estimation from the interpretation of aeromagnetic data over parts of Southwestern Nigeria

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