Taxa de produção do calor radiogênico do embasamento cristalino das bacias de Camamu e Almada

The crystalline bedrock of the Camamu and Almada basins is characterized preferentially by metamorphic rocks of granulites facies and amphibolite, with archean and paleoproterozoics ages. The main litho logic units of this context are: (i) the metatonalites associates to basic granulites and metamonzonites; (ii) the granite of Teolândia and the granodiorite of Moenda associated with amphibolites;e (iii) the mafic dikes and the neoproterozoics sienites. Among these rocks, the metamonzonites, the granite of Teolândia, the granodiorite of Moenda and the sienitos are those ones that present greaters values of radiogenic heat volumetric production rates; the metatonalites present intermediate values and the basic granulites very low values. For the Camamu basin, the metatonalites are the rocks that probably more contribute for the radiogenic heat production rate in the area. Already for the Almada basin, the contribution includes also the neoproterozoics sienites.