Analisi elementi maggiori e S in augiti di basalti del Paraná: implicazioni paleoambientali

CFB events are temporally associated to the greatest paleoenvironmental events of the last 300 Myr. SO2 is considered the main cause of environmental change during CFB events. Paranà-Etendeka province is not associated to any en-vironmental perturbation. In order to understand the role of SO2 is necessary to quantify the SO2 emitted during the Paranà- Etendeka magmatism. A new method has been proposed for determing the pre-eruptive S content of Parana lavas, hing-ing on augites. Several augites from Paranà basalts have been selected and ana-lyzed with electronic microprobe and syncrotrone. In this work, electron micro-probe results are described and discussed.