Zoneamento agrogeológico do Chapadão Urucuia e seu entorno

Abstract

The study presents the Agrogeological Zoning of the Chapadão Urucuia and its surroundings, aiming to identify potential sources of agrominerals and assess their applicability in sustainable agriculture. The study area was defined within a 300 km radius around Chapadão Urucuia, covering geological formations with remineralization potential in the states of Bahia, Piauí, Maranhão, Tocantins, Goiás, and Minas Gerais. The methodology involved geoprocessing, mineralogical and geochemical characterization, as well as the development of qualitative thematic reactivity maps, which facilitated the identification of the most promising areas for exploration. Several promising geological units were identified, with emphasis on the carbonatite of the Angico dos Dias Metacarbonatitic Complex, rich in phosphorus (10.8% P₂O₅) and calcium (35.4% CaO), and the biotite schist of the Rio Preto Group, a source of potassium (6.0% K₂O), magnesium (7.71% MgO), and calcium (4.21% CaO). The biotite schist met the MAPA certification criteria for remineralizers. The carbonatite proved to be a viable alternative as a phosphorus and calcium source, despite its low potassium concentration. In addition to its agronomic potential, the proximity of these mineral deposits to agricultural areas in western Bahia represents a strategic advantage, reducing logistical costs and encouraging the adoption of these inputs. The results demonstrate the region’s potential to reduce dependence on imported fertilizers, promoting greater autonomy in agricultural production and encouraging sustainable practices. Future research should explore the agronomic efficiency of these materials in different soil types and agricultural crops, ensuring their suitability for regional edaphoclimatic conditions.