Using Old Geophysical Data As A Tool For Modern Geological Mapping In Semi-Arid Terranes: An Example From The Seridó Belt, Northeastern Brazil

The Seridó belt, of northeastern from Brazil,<br>is an excellent example that illustrates the usefulness<br>of radiometric data in the support understanding of<br>modern geological mapping in semi-arid terranes. We<br>propose a strong relationship among geochemical,<br>isotopic and geophysical signatures of each different<br>crustal block recognized in this region. This kind of<br>approach is fundamental for investigating the regional<br>structural framework and helps to better define the<br>boundaries of the different lithostratigraphic units<br>present in all of the complexly deformed Precambrian<br>belts in Brazil.