Determination of Curie point depth, heat flow, and geothermal gradient to infer the regional thermal structure beneath the Malay Peninsula using de-fractal method

Yaro, Usman Yahaya; Abir, Ismail Ahmad; Balarabe, Bala

doi:10.1007/s12517-022-11164-5

Cited by 5 publications

(5 citation statements)

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“…Pamukçu et al (2014) found that shallow Curie point depths (∼12 km), high heat flow values (∼80 mW/m 2), and thin crust in the north and northwest of the Bitlis-Zagros Suture Zone are associated with volcanic and geothermal areas. Researchers such as (Li et al, 2019;Abdullahi and Kumar, 2020;Ma et al, 2023;Yaro et al, 2023) also used this fractal method in determining the Curie depth to reveal the thermal structure.…”

Section: Resultsmentioning

confidence: 99%

The upper crustal thermal structure of the Cameli Basin and its surroundings (SW Anatolia, Türkiye) by using the fractal-based centroid method of aeromagnetic data and its relationship with earthquakes occurring in the region

Akar

2024

Front. Earth Sci.

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The Cameli Basin and its surroundings are located in southwestern Anatolia, Türkiye, and are one of the tectonically active regions in western Türkiye. The Curie point depth of continental crust can help us to determine the regional tectonic and geothermal structures. The aeromagnetic magnetic data of the study region were used to determine the Curie Point Depth estimates. The fractal-based centroid method is used for this purpose. The fractal approach removes the effect of fractal magnetization in the power spectrum. The depth to the bottom of the deepest magnetic sources in the study region ranges between 6.9 and 14.05. The estimated thermal gradient varies from 41.28°C/km to 89.23°C/km and the average value is 58.59°C/km (580°C for magnetite). The distributions of earthquakes are compatible with NW-SE trending estimated Curie depth anomalies. Interpretation indicates that the depth to the Curie isotherm is considerably shallower than the Moho depth.

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Section: Resultsmentioning

confidence: 99%

The upper crustal thermal structure of the Cameli Basin and its surroundings (SW Anatolia, Türkiye) by using the fractal-based centroid method of aeromagnetic data and its relationship with earthquakes occurring in the region

Akar

2024

Front. Earth Sci.

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“…Curie point depth is estimated in two steps (Yaro et al, 2023;Mohammed et al, 2023): to perform the analysis the first step is to estimate the depth to the centroid (𝑍 𝑜 ) of the magnetic source from the slope of the longest part of the wavelength spectrum.…”

Section: Curie Point Depthmentioning

confidence: 99%

“…𝐼𝑛𝑝[(𝑠) ½ ] = 𝐼𝑛𝐵 − 2𝜋/𝑠/𝑍 𝑡 (3) where 𝐵 is the sum of the constant, the basal depth independent of /𝑠/. Then basal depth (𝑍 𝑏 ) of the magnetic source is calculated from equation ( 4) 𝑍 𝑏 = 2𝑍 𝑜 − 𝑍 𝑡 (4) The basal depth (𝑍 𝑏 ) of the magnetic source in the area is assumed to be the Curie point depth (Yaro et al, 2023). The Curie point depth was estimated using equation 4 (Table 1).…”

Section: 𝐼𝑛[mentioning

confidence: 99%

“…Curie point depth is the theoretical surface with a temperature of approximately 580ºC and can be considered as an index of the bottom of a magnetic source, due to ferromagnetic minerals converting to paramagnetic minerals. Geomagnetic anomalies, which are retrieved from magnetic survey data, can be utilized to study magnetic structures above the Curie point depth (Yaro et al, 2023;Sun et al 2022;Nwankwo et al, 2015;Dimgba et al, 2020)). Meanwhile, if the temperature on the Earth's surface is also taken into account, the geothermal gradient can be constructed from the temperature difference between the Earth's surface and 580ºC, divided by the Curie point depth.…”

Section: Introductionmentioning

confidence: 99%

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Curie Point Depth from Spectral Analysis of Magnetic Data in Potiskum and Environs, Yobe State, Nigeria

Ezekiel,

Peter

2024

dujopas

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The area under investigation, is part of Chad basin of northeastern Nigeria, located between latitudes 11o00´ to 12o00´N and Longitudes 11o30´ to 12o30´E, with the objective to discover more about the thermal structure of the crust in the area, a research was carried out over Potiskum and surrounding regions in Yobe State, Nigeria to estimate the curie point depth, geothermal gradient, and heat flow using spectrum analysis and empirical formula of aeromagnetic data. To acquire the regional and residual data, polynomial fitting was applied to the high-resolution digital aeromagnetic data. In order to calculate the depth to the centroid and the depth to the top boundary, the upward continued residual data was processed to produce the upward continued data, that was subjected to spectral analysis. The depth to the centroid is between 10.50 and 11.50 kilometers, the depth to the top boundary is between 5.90 and 7.16 kilometers, the depth to the Curie point is between 14.84 and 16.83 kilometers, the geothermal gradient is between 34.462 and 39.083 oCkm-1, and the heat flow is between 86.135 and 97.707 mWm-2. The Curie point depth inferred from the study indicates that the crust is thinning due to thermal upwhirling of magma and is moderately decreasing toward areas of volcanic activity that occurred in the area during the Tertiary Period. The Geothermal gradient shows that the area is a moderate temperature zone, which could likely result in partial thermal maturation of sediments and hence probable oil generation as time goes on with an increase in temperature. In the research area, the geothermal gradient is proportional to the heat flow, whereas the connection between curie depth and heat flow is inversely linear. These findings are in line with the geotectonic regime that is now in effect in the research area. However, this analysis shows that the heat flow that was obtained from the study is sufficient to be utilized as a geothermal energy source.

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“…It (Heat flow) refers to circulation of heat, from interior of earth to the exterior (Abdullahi et al, 2023;Barka and Nur, 2023;Yaro et al, 2023). Using Fourier's Law, the following formula was employed to calculate the thermal gradient and heat flow.…”

Section: Heat Flow and Geothermal Gradientmentioning

confidence: 99%

Aeromagnetic Data Investigation of Geothermal Energy Potentials in Ramfashi and Environs Zamfara State, Nigeria

Ezekiel,

Peter,

Garba

2024

dujopas

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The goal of the geothermal study over Ramfashi and Environs in Northwestern Nigeria was to use aeromagnetic data to determine the region's heat flow, geothermal gradient, and Curie point depth. For the purpose of analyzing the aeromagnetic data, on residual and regional magnetic intensity were gathered using regional residual separation. The residual data was upward continuued to obtain the upward data to perform spectral analysis. This allowed for calculation of depths to centroid and top boundary, which in turn allowed for calculation of region's heat flow, geothermal gradient, and Curie point. The analysis's conclusions revealed that, with an average value of 48.53 °Ckm-1, the distances to the heat flow, top boundary, centroid, and Curie point varied between 6.73 km and 7.39 km, 2.01 km and 2.16 km, and 113.55 mWm-2 and 128 mWm-2 respectively. Geothermal gradient also varied between 45.42 °Ckm-1 and 51.33 °Ckm-1. According to the heat flow data from this investigation, the area possesses anomalous geothermal energy and a sizable heat source.

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Determination of Curie point depth, heat flow, and geothermal gradient to infer the regional thermal structure beneath the Malay Peninsula using de-fractal method

Cited by 5 publications

References 42 publications

The upper crustal thermal structure of the Cameli Basin and its surroundings (SW Anatolia, Türkiye) by using the fractal-based centroid method of aeromagnetic data and its relationship with earthquakes occurring in the region

The upper crustal thermal structure of the Cameli Basin and its surroundings (SW Anatolia, Türkiye) by using the fractal-based centroid method of aeromagnetic data and its relationship with earthquakes occurring in the region

Curie Point Depth from Spectral Analysis of Magnetic Data in Potiskum and Environs, Yobe State, Nigeria

Aeromagnetic Data Investigation of Geothermal Energy Potentials in Ramfashi and Environs Zamfara State, Nigeria

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