Impact of dikes in the well productivity - A case study in the Ponta Grossa Dike Swarm

Abstract

Dike swarms are mega-structures observed in different geological contexts. However, it is very difficult to obtain quantitative information about the units that make up these structures from magnetometric data. This work uses a method that performs the inversion of magnetic data profiles and cluster analysis of obtained solutions. The results are used to interpret the effects of a dike swarm on water-well's productivity. The method is applied to a region in the Ponta Grossa Dike Swarm. The results show that wells located in zones of influence of dikes, which intrude crystalline rocks of high metamorphic grade, are 14.5 times more productive than those located in the host rocks outside these zones. For crystalline rocks of low metamorphic degree, wells in the zones of influence of dikes are 4.3 times more productive than when allocated in the host rocks not affected by the presence of dikes.