Metodología para la exploración de recursos en secuencias calcáreas - silicoclásticas deformadas

Abstract

The cement industry in Arequipa exploits calcareous deposits belonging to the siliciclastic sequences corresponding to the Yura Group. The sedimentary deposits appear in a succession of strata of limestone, sandstone, siltstone and structurally deformed. The deformations make lateral tracking of the strata of interest somewhat complex; sometimes the strata appear affected by structures of the type folds and unconformities; the faults are not important in terms of number or magnitude; there are only some very local ones. A sector in production and another two in exploration have been studied; in the three sectors the structures appear as anticlinal folds, synclines, slumps and angular unconformities, which have had to be adequately recognized, making the detailed stratigraphy to be properly mapped, determine the structural behavior and be able, with greater precision, to calculate the volumes of resources applying the methodology of geological sections. In the South Sector, around more than 217 million tons were found, in the South Sector there were just over 126 million tons and in the Northwest Sector just over 90 million tons of limestone and in the three sectors, with more of 80% of calcium carbonates, required for the manufacture of cement.