Comparative study of estimating the Curie point depth and heat flow using potential magnetic data

Abstract The estimation of the Curie point depth (CPD) and heat flow (HF) from magnetic data is useful for geothermal tectonic studies. However, methodology estimating these values still controversial as numerous studies have used different types transformed data. Most utilize total intensity (TMI) or reduced to pole (RTP) data, since shallow bodies may affect final CPD values, low-pass (LP) wavelength filtering has also been estimate CPD. In this study, two-dimensional radially averaged spectral analysis was applied land-based Sinai Peninsula. TMI RTP were both analyzed, using LP filtered wavelengths, HF compared. cut-off parameter selected in terms geologic complexity. results show that estimated are well correlated regardless whether either RTP. produced a spatial shift smaller than window size being used. Additionally, centroid method primarily dependent on wavenumber, which varied slightly applying There slight differences CPDs when short filter (e.g., 20 km) applied, whereas increasing 40 caused increase exceeding plausible limits, associated trends compared other methods. areas where basement rocks exposed, can be with wavelength. discussed context seismicity gravity-based Moho depths, measurements.