Un servicio digital para la estimación de la dirección de magnetización en anomalı́as escalares de intensidad total
Keywords:
servicio digital, anomalías escalares de intensidad total, dirección de magnetizaciónAbstract
Presentamos un servicio digital desarrollado en Python cuyo objetivo es permitir a geocientistas especial reuniónizados en métodos potenciales de prospección estimar la dirección de magnetización de cuerpos anómalos a partir de registros de campo. El servicio utiliza para el cálculo numérico dos métodos que emplean el filtro de reducción al polo de las anomalı́as escalares de intensidad total. Uno de estos métodos optimiza la correlación entre la magnitud del gradiente espacial y el gradiente vertical de la reducción al polo y el otro método consiste en maximizar los mı́nimos de la reducción al polo. Los usuarios interactúan de manera simplificada con el servicio enviando parámetros de referencia del área y una cuadrı́cula de anomalı́as magnéticas y reciben una respuesta automática con la recepción de un reporte que incluye los parámetros de interés. El reporte ofrece al usuario mapas de correlación y de mı́nimos de la reducción al polo que pueden ajustarse según las necesidades individuales a partir de parámetros propios como el rango de los ángulos considerados, el intervalo de muestreo para el ángulo de inclinación magnética y el intervalo de muestreo para el ángulo de declinación magnética. La guı́a del servicio se encuentra disponible en la página web de la cátedra de Métodos Potenciales de Prospección de la Facultad de Ciencias Astronómicas y Geofı́sicas de la Universidad Nacional de La Plata. En este trabajo se presenta el servicio de cálculo y se describen los métodos de estimación utilizados, ası́ como sus alcances y limitaciones e ideas de expansión y desarrollos posteriores.
Downloads
References
Baranov, V. & Naudy, H. (1964). Numerical calculation of the formula of reduction to the magnetic pole. Geophysics, 29(1), 67–79. https://doi.org/10.1190/1.1439334
Bhattacharyya, B. K. (1964). Magnetic anomalies due to prism-shaped bodies with arbitrary polarization. Geophysics, 29(4), 517. https://doi.org/10.1190/1.1439386
Dannemiller, N. & Li, Y. (2006). A new method for determination of magnetization direction. Geophysics, 71(6), L69–L73. https://doi.org/10.1190/1.2356116
Gerovska, D., Araúzo-Bravo, M. J., & Stavrev, P. (2009). Estimating the magnetization direction of sources from southeast bulgaria through correlation between reduced-to-the-pole and total magnitude anomalies. Geophysical Prospecting, 57, 491–505. https://doi.org/10.1111/j.1365-2478.2008.00761.x
Gómez, J. & Pedraza De Marchi, A. C. (2023). Estimación de la dirección de magnetización por métodos indirectos. Actas de trabajos completos del E-ICES 17 (17 Encuentro internacional de ciencias de la tierra), 259–267.
Haney, M., Johnston, C., Li, Y., & Nabighian, M. (2003). Envelopes of 2D and 3D magnetic data and their relationship to the analytic signal: Preliminary results. 73rd Annual International Meeting, SEG, Expanded Abstracts, 596–599.
Haney, M. & Li, Y. (2002). Total, magnetization direction and dip from multiscale edges. 72nd Annual International Meeting, SEG, Expanded Abstracts, 735–738.
Hansen, R. O. & Pawlowski, R. O. (1989). Reduction to the pole at low latitudes by Wiener filtering. Geophysics, 54, 1607–1613. https://doi.org/10.1190/1.1442628
Keating, P. & Zerbo, L. (1996). An improved technique for reduction to the pole at low latitudes. Geophysics, 61(1), 131–137. https://doi.org/10.1190/1.1443933
Lelièvre, P. G. & Oldenburg, D. W. (2009). A 3d total magnetization inversion applicable when significant, complicated remanence is present. Geophysics, 74(3), L21–L30. https://doi.org/10.1190/1.3103249
Liu, S., Fedi, M., Hu, X., Baniamerian, J., Wei, B., Zhang, D., & Zhu, R. (2018). Extracting induced and remanent magnetizations from magnetic data modeling. Journal of Geophysical Research: Solid Earth, 123, 9290–9309. https://doi.org/10.1029/2017JB015364
Liu, S., Hu, X., Xi, Y., Liu, T., & Xu, S. (2015). 2d sequential inversion of total magnitude and total magnetic anomaly data affected by remanent magnetization. Geophysics, 80(3), K1–K12. https://doi.org/10.1190/geo2014-0019.1
Liu, S., Hu, X., Zhang, D., Wei, B., Geng, M., Zuo, B., Zhang, H., & Vatankhah, S. (2020). The idq curve: A tool for evaluating the direction of remanent magnetization from magnetic anomalies. Geophysics, 85, J85–J98. https://doi.org/10.1190/geo2019-0545.1
Liu, Y. X., Li, W. Y., & Ma, G. Q. (2022). Oil and gas basin analysis based on airborne gravity and magnetic data. Applied Geophysics. https://doi.org/10.1007/s11770-022-0970-2
Nabighian, M. (1972). The analytic signal of two-dimensional magnetic bodies with polygonal cross-section: Its properties and use for automated anomaly interpretation. Geophysics, 37, 507–517.
Nabighian, M. N., Grauch, V. J. S., Hansen, R. O., LaFehr, T. R., Li, Y., Peirce, J. W., Philips, J. D., & Ruder, M. E. (2005). The historical development of the magnetic method in exploration. Geophysics, 70, 33ND–61ND. https://doi.org/10.1190/1.2133784
Reis, A. L. A., Oliveira, V. C., & Barbosa, V. C. F. (2020). Generalized positivity constraint on magnetic equivalent layers. Geophysics, 85, J99–J110. https://doi.org/10.1190/geo2019-0706.1
Ribeiro-Filho, N., Bijani, R., & Ponte-Neto, C. (2020). Improving the cross-correlation method to estimate the total magnetization direction vector of isolated sources: A space-domain approach for unstable inclination values. Geophysics, 85(4), J59–J70. https://doi.org/10.1190/geo2019-0008.1
Roest, W. & Pilkington, M. (1993). Identifying remanent magnetization effects in magnetic data. Geophysics, 58, 653–659. https://doi.org/10.1190/1.1443449
Zhang, H., Ravat, D., Marangoni, Y. R., Chen, G., & Hu, X. (2018). Improved total magnetization direction determination by correlation of the normalized source strength derivative and the reduced-to-pole fields. Geophysics, 83(6), J75–J85. https://doi.org/10.1190/geo2017-0178.1
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 Ana Carolina Pedraza De Marchi, Julián L. Gómez

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Starting in 2022 (Vol. 43 number 2) articles will be published in the journal under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license (CC BY-NC-SA 4.0)
According to these terms, the material can be shared (copied and redistributed in any medium or format) and adapted (remixed, transformed and created from the material another work), provided that a) the authorship and the original source of its publication (journal and URL of the work), b) is not used for commercial purposes and c) the same license terms are maintained.
Prior to this date the articles were published in the journal under a Creative Commons Attribution license (CC BY)
In both cases, the acceptance of the originals by the journal implies the non-exclusive assignment of the economic rights of the authors in favor of the editor, who allows reuse, after editing (postprint), under the license that corresponds according to the edition.
Such assignment means, on the one hand, that after its publication (postprint) in the GEOACTA Magazine of the Association of Geophysicists and Geodesists, the authors can publish their work in any language, medium and format (in such cases, it is requested that it be recorded that the material was originally published in this journal); on the other, the authorization of the authors for the work to be harvested by SEDICI, the institutional repository of the National University of La Plata, and to be disseminated in the databases that the editorial team considers appropriate to increase visibility. of the publication and its authors.
Likewise, the journal encourages the authors so that after their publication in the Journal of the Association of Geophysicists and Geodesists, they deposit their productions in other institutional and thematic repositories, under the principle that offering society scientific production and Unrestricted academic scholarship contributes to a greater exchange of global knowledge.