The study area includes the eastern portion of the Neoproterozoic Araguaia Fold Belt and the western edge of the Paleozoic Parnaíba Basin in N Brazil. The Araguaia Belt comprises an extensive sequence of metasedimentary and igneous rocks. Intrusive and extrusive igneous rocks (dykes and sills) occur within the sedimentary sequences of Parnaíba Basin. Then, this paper presents a geophysical study to map the huge magmatic manifestations which occur in western border of the Parnaiba basin (Mosquito Formation), volcanic rocks in the eastern border of Araguaia Belt and magnetic lineaments and domain in those areas, based on airborne magnetic data.


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