The analysis of aeromagnetic data from the continental shelf area near the Santos Basin border shows several punctual anomalies that can be related to alkal ine bodies as observed in the adjacent onshore area. ln this pape rwe propose acomparative analysis of the magnetic anomalies associated to the well know onshore Arraial do Cabo (Cabo Frio, Rio de Janeiro, Brazil) alkaline bodies and aprominent anomaly located near the Santos Basin Cretaceous hinge line. Here we propose a non-conventional workflow applying the 2D Euler deconvolution method integrated in aroutine that honors information derived from the analytical signal amplitudes and that embodies two distinct criteria to compute and analyze the solutions. Also aroutine to directly estimate the parameters was implemented in order to compare with the solutions obtained by applying those criteria. The resulting solutions can be used as additional information to constrain other inversion methods and to support more realistic geological models in areas lacking direct observations. The estimated physical parameters derived from local alkaline bodies that cause the observed onshore and offshore anomalies can favor aglobal comparative study concerning their magnetic signatures. Ongoing research dealing with these alkaline intrusions and the accompanying magnetic anomalies will be relevant to understand the magmatic and tectonic events associated with the Santos Basin evolution.
Euler deconvolution; high resolution airborne magnetic data; Cabo Frio High; Santos Basin; alkaline magmatism
