Argilominerais de rochas carbonáticas Formação Pedra de Fogo, Palestina-PA

Abstract

The Formation Stone of fire of age Perminana, is characterized by a cyclical sedimentation constituted by intercalations of Sandstone, Siltitos, Shales and Carbonic Banks. The research on the Argilominerals imprisoned in the crystalline network of the Carbonica rocks, near the Mineral World mine, aimed at the collection and description of the Carbonic Rocks, besides subjecting these to methodologies to obtain the clay fraction, analyzed by X-ray diffraction of pipetting on glass slides, treatment with Ethylene Glycol and oven heating. Such techniques resulted in the identification of Argilominerals Ilite, and Caulinite, which function as a kind of "clock" that stopped at the moment of the formation of the Carbonic Rock that encompasses it, storing information in the depositional moments. Thus, interpretations were made about the Paleoclima and depositional Paleoambiente for the region of the municipality of Palestina do Pará-PA (Pedra de Fogo Formation, west border of the Parnaíba Basin). Among the main theoretical contributions we use Michelli (2003), Oliveira (2008) and Faria Junior (1979).