[Society of Exploration Geophysicists and Brazilian Geophysical Society 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15-18 August 2011 - Rio de Janeiro, Brazil (15 August to 18 August)] 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011 - Study of Pratinha-II magnetic anomaly: Acquisition, processing and interpretation of aeromagnetic and gravimetric data