Mapeamento geológico e análise estrutural de uma área de extração de rocha ornamental a noroeste do Município de Banabuiú-CE

Abstract

The study area is located geologically in Ceará Central Domain (located in the Borborema Province) northwest of the city of Banabuiú, which is situated in the state of Ceará. The study was conducted in an area of 12 Km2 on a scale of 1: 15,000, comprising an extraction area ornamental stone blocks located in the "Serra do Feijão". The region is represented by rocks of Paleoproterozoic lithologically ages (gneissicmigmatitic basement), Neoproterozoic (type-S granites), Phanerozoic (Paleozoic pegmatitic veins, and the colluvial-alluvial Cenozoic sediments). The petrographic analysis shows that the gravite is classified as monzogranite, while the basement has been defined as migmatite. The structural analysis shows that the primary regional joints have a tendency to ENE-WSW, while joints present in the extraction region of dimension stones is present in the oriented as NE-SW and NW-SE. Regarding the economic aspect, it is suggested to make the withdrawal of blocks using low tops, whose height corresponds to the height of the block and the blocks of rock cuttings are carried out only with diamond wire, aimed at low waste generation, and is a tool with a good benefit-cost ratio.