Proceedings of the 39. Brazilian congress on geology. v. 2

The book presents the 39. Brazilian Congress on Geology works, occurred in Salvador, Bahia, during the period of September 1 to 6, 1996. The meeting main subject - geology and society - reflects the current change epoch. The symposiums revealed the more important actions about geosciences applications to the society in the country. The round tables, structured for the polemical subjects debates that involves the geosciences and the mineral sector crisis aspects, were achieved by several invited participants completely embraced with the subject. During the congress activities development there were some course, technical excursions and external actions in Salvador, aiming to show the geosciences role to the social welfare. The works were presented in the following thematic sections: geochemistry and petrology