Estimation of Curie-point depth, heat flow and geothermal gradients in Shelleng area and environs, northeastern Nigeria from aeromagnetic data

• Autorzy: Yassah Hassan Nelson , Onuoha Kalu Mosto , Mode Ayonma Wilfred , Ezekiel Kamureyina , Okoro Eze Martins

Identyfikatory

DOI

10.1007/s11600-024-01352-0

• Języki publikacji: EN

Abstrakty

EN

Regional estimation of Curie-point depth (CPD), subsurface heat flow and geothermal gradients variations in the Shelleng area and environs of northeastern Nigeria was carried out in this study using spectral analysis of high-resolution aeromagnetic (HRAM) data. The HRAM data were divided into nine (9) overlapping blocks and each of the blocks was analyzed to obtain the 2D radially averaged power spectrum which enabled the computation of depths to the top and centroid of magnetic sources. The obtained values were then used to determine the depth to the bottom of magnetic bodies or the CPD, geothermal gradients and crustal heat flow changes in the study area. Results showed that CPD varies from 7.56 ± 0.122 to 18.01 ± 0.324 km, with an average of 11.72 ± 0.166 km; geothermal gradient values vary between 32.20 and 76.72 °C/ km, with an average of 52.76 °C/km, while heat flow variations range from 80.51 to 191.80 mW/m2, with an average of 131.85 mW/m2. Shallow CPD zones identified in the northeastern, western and southwestern portions of the study area correspond to zones of high geothermal gradient values and high subsurface heat flow distributions. These areas signify zones associated with anomalous subsurface thermal conditions and were therefore recommended for further detailed geothermal energy exploration studies.

Słowa kluczowe

EN

aeromagnetic data; geothermal gradient; heat flow; spectral analysis; Curie point depth

PL

dane aeromagnetyczne; gradient geotermiczny; przepływ ciepła; analiza widmowa

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2025
• Tom: Vol. 73, no. 1
• Strony: 203--220
• Opis fizyczny: Bibliogr. 64 poz.

Twórcy

autor

Yassah Hassan Nelson

• Department of Applied Physics and Electronics Technology, The Federal Polytechnic, Mubi, Nigeria

autor

Onuoha Kalu Mosto

• Department of Geology, University of Nigeria Nsukka, Enugu, Nigeria

autor

Mode Ayonma Wilfred

• Department of Geology, University of Nigeria Nsukka, Enugu, Nigeria

autor

Ezekiel Kamureyina

• Department of Geology, Adamawa State University, Mubi, Nigeria

autor

Okoro Eze Martins

• Department of Geology, University of Nigeria Nsukka, Enugu, Nigeria

• https://orcid.org/0000-0002-8387-8489

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).