DECONVOLUÇÃO DE EULER: NOVA PERSPECTIVA PARA A INTERPRETAÇÃO 3D DE ESTRUTURAS GEOLÓGICAS

This paper deals with a 3D magnetic data (Seridó Project, 1973) interpretation of regional geologic structures (Patos Lineament and João Câmara-Picuí Shear Zone) in Northeast Brazil based on horizontal position and depth for magnetic sources given by Euler deconvolution. Best parameters for Euler deconvolutions were found from different combinations of structural index, window sizes, and error tolerances. Best product yelded solutions for the structural trends with depth through 5 km. The Patos Lineament (E-W) and João Câmara-Picuí Shear Zone (NE-SW) showed maximum depth in the order of 3 km and 2 km, respectively. Deeper magnetic sources (> 5 km) were found under supracrustal sequence of the Seridó Belt, in the portions Southwest of Currais Novos city. 3D plots proved to be useful to get a glimpse on the geometry and distribution of magnetic material within these structures.