What kind of information can be gained from a borecore-hosted deformation band?

Abstract

Over the last decades, more and more publications concerned with syn-diagenetic deformation processes. This tendency is obvious also in Hungary, that is proven by several recent studies dealing with deformation bands and their formation conditions. In these articles, authors provide detailed deformation history and stress field reconstructions of the studied formations. These results are dominantly based on structural geological data determined in outcrops. In the present study we analysed an unoriented bore core sample, which hosts a deformation band, therefore, to which the traditional structural geological methods cannot be applied. Hereby, we have introduced a complex methodology including petrological, image analysis-based microstructural and geochemical approaches that might help to characterize deformation bands and their particular formation conditions in cases of both outcrop and borehole samples. In order to reveal the alteration processes that relate to the deformation band studied, we thoroughly studied the petrology and diagenetic history of the host sandstone.