Curie point depth and heat flow maps deduced from magnetic data of Gonghe Basin, China

2021 ◽  
Author(s):  
Zhuo Wang ◽  
Zhaofa Zeng
Keyword(s):  
Magnetic Susceptibility ◽  
Heat Flow ◽  
Curie Point ◽  
Magnetic Data ◽  
Inversion Method ◽  
Adjacent Area ◽  
Curie Point Depth ◽  
Actual Measurement ◽  
New Energy ◽  
Gonghe Basin

<p>Most recently, energy consumption around the world steps into a new situation divided by petroleum, natural gas, coal and new energy. Fossil fuels are disputed for pollution and CO<sub>2</sub> emission, and geothermal energy is popular as a clean, ecofriendly and renewable new energy, which can be used for power generation or direct application (e.g. bathing, building heating).</p><p>Gonghe Basin, located in the western part of China, has been thought as a potential geothermal field since 1989. To investigate geothermal distribution in Gonghe Basin and adjacent area, magnetic data is used in this paper. Firstly, we proposed an improved magnetic interface inversion method based on traditional Park-Oldenburg method. This improved method introduces dual geological interfaces instead of one interface, variable magnetic susceptibility instead of constant magnetic susceptibility and upward continuation in a form equivalent to inversion iteration in the Fourier domain instead of the divergent, downward continuation term, to improve suitability and precision of the inversion method. Then Curie point depth (CPD) map and heat flow map could be deduced from magnetic data through the improved Park-Oldenburg method.</p><p>The CPDs range from 16 to 25.5 km and heat flow values range from 61 to 91 mW/m<sup>2</sup>. What's more, we take faults and seismic activities into account, we find that study area has greater geothermal potential in eastern part with shallower CPD, higher heat flow values and more active subsurface structure. Considering with known geothermal value in actual measurement, the results indicate high heat flow value in Gonghe Basin is coaction of high thermal background, radiogenic heat and partial geothermal anomalous heat source. </p>

scholarly journals Curie point depth and heat flow deduced from spectral analysis of magnetic data over Adamawa volcanic region (Northern Cameroon): geothermal implications

2020 ◽  
Vol 2 (8) ◽  
Author(s):  
Kasi Njeudjang ◽  
Janvier Domra Kana ◽  
Ahmat Tom ◽  
Jean Marcel Abate Essi ◽  
Noël Djongyang ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Heat Flow ◽  
Curie Point ◽  
Magnetic Data ◽  
Curie Point Depth ◽  
Volcanic Region ◽  
Northern Cameroon

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

2019 ◽  
pp. 1-8
Author(s):  
B. C. Udochukwu ◽  
M. Akiishi ◽  
A. A. Tyovenda
Keyword(s):  
Heat Flow ◽  
Curie Point ◽  
Geothermal Energy ◽  
Geothermal Gradient ◽  
High Heat ◽  
Curie Point Depth ◽  
The South ◽  
Geothermal Resources ◽  
North East ◽  
Curie Depth

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.

scholarly journals Estimation of Curie point depths in the Southern Vietnam continental shelf using magnetic data

2019 ◽  
Vol 41 (3) ◽  
pp. 216-228 ◽  
Author(s):  
Pham Thanh Luan ◽  
Do Duc Thanh ◽  
Erdinc Oksum ◽  
Le Thi Sang
Keyword(s):  
Analytical Solution ◽  
Continental Shelf ◽  
Curie Point ◽  
Thermal Structure ◽  
Magnetic Data ◽  
Curie Point Depth ◽  
Heat Flows ◽  
Southern Vietnam ◽  
Exponential Equations ◽  
North Western

This study attempts to estimate the thermal structure in the Southern Vietnam continental shelf by calculating the Curie point depth isotherm using magnetic data. The Curie point depth values, from 49 overlapping blocks 128 × 128 km in size, have been estimated by the exponential approach. This approach is based on the analytical solution of the exponential equations obtained from transforming the magnetic anomaly data into the frequency domain. According to the obtained results, the range of Curie point depths is from 15.3 to 35.6 km. In the study area, the greatest Curie point depth is located in the South-Eastern part, and the smallest depth is located at North-Western part. The heat flows derived from the Curie point depths are also presented. The obtained results are at relatively high resolutions and in agreement with the published information available for the study area. The Curie point depths generally lie below the Moho surface in this region but lie above in some locations, notably the Cuu Long basin.

Curie-point depth from spectral analysis of magnetic data in central–southern Europe

2005 ◽  
Vol 152 (4) ◽  
pp. 267-276 ◽  
Author(s):  
P. Chiozzi ◽  
J. Matsushima ◽  
Y. Okubo ◽  
V. Pasquale ◽  
M. Verdoya
Keyword(s):  
Spectral Analysis ◽  
Curie Point ◽  
Magnetic Data ◽  
Curie Point Depth ◽  
Southern Europe
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