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Geological interpretation of lineament analysis and paleotectonic reconstruction: Carpathian nappe zoneNormal access

Authors: D. Kravchenko, S. Shpyrko and A. Mazko
Event name: 11th International Conference on Monitoring of Geological Processes and Ecological Condition of the Environment
Session: Monitoring And Modelling Of Natural Hazards And New Technologies For Risk Minimization And Prevention
Publication date: 19 March 2018
DOI: 10.3997/2214-4609.201800078
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.11Mb )
Price: € 20

Summary:
The results of the lineament analysis in the Carpathian nappe zone are used for the possible paleotectonic reconstruction of the Alpian stresses and their consequences in the geomorphology. The negative relief lineaments, detected from aerial and satellite imagery and corresponding to river valleys and their smaller scale inflows and canyons, are interpreted as associated systems of fractures (e.g., either shear faults R, R' or rupture cracks T as by Riedel model), caused by regional-wide tectonic stresses during Alpine orogenesis. In particular, statistical analysis of these lineaments reveals two distinct dominant systems with trending around 30° and 50°. These systems can be conjugated R and R' shear faults, respectively dextral and sinistral strike slips as a consequence of the regional tectonic stress in the NE direction which is a dominant Alpine driving force in the region. Similar interpretation is further proposed for the smaller scale stress-deformation transformations, in particular, for the “block and key tectonics”, observed at the outcrops. The latter is explained by the complementary Anderson model of uniaxial stresses on the regional scale. This interpretation can be verified during field works or by imagery processing, in particular, by systematic classification of canyon lineaments into dextral/sinistral strike slips and rupture cracks, thus a program for corresponding studies is proposed.


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