Comportamento aerogeofísico de kimberlitos e corpos associados

The Coromandel region is wor ldwide known for its large diamond exploration. Several ultramafic alkaline intrusions belonging to the Alto Parnaiba Igneous Province (APIP) are also found there. Magnetic and gamma-ray anomalies due to ultramafic intrusi ons were identified from 250m line-spaced airborne geophysical data and three-dimensional image analisys were created to visualize it. Images from magnetometry sho ws dipolar anomalies generated by the kimbelitic bodies and some outcropping ones may be observed by gamma-ray products, such like eTh and eU images. Using radiometric data lead us to find new similar anom alies that may be interpreted as intrusive bodies of kimberlite or kamafugite signatures. Field checking, geochemical analysis and petrographical studies are needed to confirm the relationship between anomalies and new bodies.