[1] Univ Fed Rio Grande do Norte, Postgrad Program Geodynam & Geophys, Natal, Brazil
[2] Univ Fed Rio Grande do Norte, Dept Geophys, Natal, Brazil
[3] Natl Inst Sci & Technol Petr Geophys, CNPq, INCT GP, CAPES, Natal, Brazil
[4] Univ Fed Rio Grande do Norte, Dept Geol, Natal, Brazil
[5] Univ Fed Rio Grande do Norte, PRH 42 ANP, Natal, Brazil