In this work, we calculated the Curie Point Depth (CPD) for the Brazilian Equatorial Margin using the Fourier and continuous wavelet (CWT) transforms considering a linear inversion for random and fractal magnetization models with four different magnetic datasets. After comparing our results with Curie maps reported by previous studies, we concluded that the more consistent Curie isotherm was obtained by applying the random model based on CWT to the Brazilian Equatorial Margin Magnetic Map dataset, a compilation of airborne and marine magnetic surveys complemented with magnetic anomaly data extracted from the World Digital Magnetic Anomaly Map in the deep-water oceanic domain. In addition, we estimated heat flow using CPD results and compare with a global heat flow model based on geothermal measurements. In the continental domain, Curie values range from 18 to 35 km, shallowing westwards until reaching anomalously 10 km in the Tocantins Province. In turn, the heat flow decreases eastwards from 88 to 58 mW/m² as the Curie depth increases within the continental crust. Meanwhile, in the deep-water oceanic domain, the heat flow is overall higher (between 72 and 87 mW/m²), indicating a younger and warmer oceanic crust, whereas the Curie isotherm is shallower, varying between 10 and 30 km. Even so, it is deeper than Moho, suggesting a magnetized lithospheric mantle.

在这项工作中，我们使用傅立叶和连续小波 (CWT) 变换计算了巴西赤道边际的居里点深度 (CPD)，同时考虑了具有四个不同磁数据集的随机和分形磁化模型的线性反演。在将我们的结果与先前研究报告的居里图进行比较后，我们得出结论，通过将基于 CWT 的随机模型应用于巴西赤道边缘磁图数据集，获得了更一致的居里等温线，该数据集是由机载和海洋磁测数据与磁力图相辅相成的汇编。从世界数字磁异常图中提取的深水大洋域异常数据。此外，我们使用 CPD 结果估计热流，并与基于地热测量的全球热流模型进行比较。在大陆领域，居里值范围从 18 到 35 公里，向西变浅，直到在托坎廷斯省异常地达到 10 公里。反过来，热流向东从 88 mW/m 减少到 58 mW/m²随着大陆地壳内居里深度的增加。同时，在深水洋域，热流总体较高（72~87 mW/m ²），表明洋壳更年轻、更温暖，而居里等温线更浅，变化范围在10~30 km之间。即便如此，它比莫霍面更深，表明存在磁化的岩石圈地幔。