Geomorphological technique application to fault studies at Karelia

Abstract

A method of disjunctive dislocation study is considered using linear landforms connected with outlines, the former being traced at topographic maps, aerial photographs or by visual observations from airplane. The method (used together with geological studies) revealed ancient and neotectonic faults of various orders as well as tectonic zones characterized with high density of fractures. Neotectonic faults are mainly up thrusts, strike-slip faults and tear faults. There were established three types of neotectonic rejuvenation of ancient faults: direct rejuvenation, dispersion and shift. In case of direct rejuvenation the neotectonic movements take place directly along the ancient fault plane, in case of dispersion a zone of neotectonic fractures develops instead of a single fault, while in case of shift the most active neotectonic movements take place aside of the ancient tectonic suture.

The method of geomorphological lineaments applied to disjunctive dislocations can be useful for regional and detailed geological studies and ore prospecting including those in ore regions and within ore fields.