GEOCHEMISTRY OF MAJOR ELEMENTS IN UPPER CRETACEOUS SEDIMENTITES OF THE ARGENTINE AUSTRAL BASIN -

Authors

  • Marcelo Jorge Manassero

Keywords:

Geochemistry, Pelitas, Sandstones, Chemical composition, Tectonic environments,

Abstract

A geochemical study has been done based on the chemical composition ofthe major components (SiOz ' Alz 03 , Fep3' MgO, MnO, CaO, NazO,KzO, and Pp5' TiOz )' Ten samples of mudstones and sandstones belonging to the Upper Cretaceous sequence ofthe Autral Basin (Argentina) have been analysed, and after processing, data show cratonic (La AnitaFm) and magmatic arc (Calafate and Cerro Cazador formations) provenances. These results are totally coherent with previous studies on sandstone petrography and clay mineral analisys by x ray diffraction.

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