Integração de métodos geofísicos na modelagem crustal na Bacia de Santos

The Santos Basin is a passive margin basin generated during the Neocominian, associated with Gondwana breakup event. The thickness of the sedimentary package reach 15 km, including rift sequence deposited over a thinned crust which originally was 35 km thick. Crustal modeling was performed over 8 lines aiming to recognize the rift phase geometry and estimate the amount of crustal stretching. The database used was: four depth converted seismic horizons, magnetic and gravimetric grids and depth to magnetic basement data. The modeling results demand thick and widespreading volcanic layers to fit the model. These wedge shaped volcanic fill, bordered with normal faults, are a common feature in rift basins. Four volcanic provinces have been defined, based on structural compartmentalization and regional occurrence of the basal rift layer, so called Sin-Rift I phase.