2019-09-032019-09-032012-11CARVALHO, Abner Souza de. Estudo geoquímico dos folhetos Neoproterozóicos da formação guia no sul do cráton amazônico, Mato Grosso. Orientador: José Augusto Martins Corrêa. 2012. 69 f. Trabalho de Curso (Bacharelado em Geologia) - Faculdade de Geologia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2012. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/1913. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/1913The climate change during the late Neoproterozoic had left important records in the Paraguay Belt in the north and south of the Amazon Craton and had increased the interest from some studies and debates in the region. In this context, the Guia Formation that is included in Araras Group and occurs along the southern edge of the Amazonian Craton, object of this study is characterized by deposits associated with transitional and shallow marine environments. The study area of these rocks comprises the municipalities of Cáceres and Poconé along the BR-070 highway. The mineralogical, geochemical and Total Organic Carbon (TOC) analysis, allowed the individualization of two types of rocks, shales and marls. These rocks are enriched in calcium and magnesium and are composed mainly of quartz (Q), K-Feldpar (F), calcite (C), dolomite (D) chlorite (Ch) and illite (I). The presence of smectite clay minerals in the assembly of the samples from the top of Carmel profile indicates a cold to temperate climate. The Chemical Index of Alteration (CIA) calculated for these rocks confirms little weathering rate. Chemical analysis of the major elements indicates granitic rocks as main source rocks. The tectonic environment determined from the diagram of Roser and Korsch (1986) indicates passive margin. The characterization of the maturation of the organic matter present results showing that the rocks have a potential generator hydrocarbons which deserves further refined, for considering the paleoenvironment the end of neoproterozoic, these rocks can generate good oil. The type of kerogen found in these rocks (type IV), with poorly understood its nature, does not match the existing paleoenvironment at the end of the Neoproterozoic. Several hypotheses have been raised to explain the origin of this type of kerogen, one of them is due to a possible contamination of these rocks or the presence of compounds one of them is due to a possible contamination of these rocks or the presence of compounds that by having the same composition, interfered in the result of the type of kerogen.Acesso AbertoGeoquímica – Mato Grosso (MT)NeoproterozóicoFaixa ParaguaiCráton AmazônicoCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIATrabalho de Curso - Graduação - Monografia