2019-08-302019-08-302012SILVA, Igor de Lima Basílio da. Brechas carbonáticas da formação Serra do Quilombo, Região de nobres (MT). Orientador: Roberto Vizeu Lima Pinheiro. 2012. 53 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/1863. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/1863This research characterized three types of dolomitic breccias in the Serra do Quilombo Formation in the Nobres region (MT) e suggested their possible development mechanism. During the field stage geologic mapping was applied at scale 1:100, with the aid of a GPS device, on mine walls to describe the breccia features. In the laboratory stage the textural description was detailed through thin sections of hand samples stained with Alizarin Red to distinguish the carbonate minerals. The rock characterization indicated the presence of cemented, synsedimentary and karst breccias. The hydraulic fracturing formed the cemented breccias as the fluid pressure variations bursted the rock tensile stress; cyclic activity of water-wave produced by storms induced synsedimentary brecciation through the in situ reworking and desegregation of the once cohesive material; as the dolomites were exposed to weathering processes, karst features were installed like karst breccias and fissure fills. The breccias display noncontinuous accumulations in general at most one hundred meters big. The veins and veinlets filling by cement in hydrothermal breccias obliterated the porosity created during the fragmentation process and sealed this pathways. This puts the Serra do Quilombo Formation as a sealing in so said Araras Petroliferous System.Acesso AbertoBrecha carbonáticaMecanismo de brechaçãoFormação Serra do QuilomboRegião de Nobres (MT)CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIATrabalho de Curso - Graduação - Monografia