Gravitational sliding of the carbonate megablocks in the Vipava Valley, SW Slovenia

Maja Kocjančič; Tomislav Popit; Timotej Verbovšek

doi:10.3986/AGS.4851

Authors

Maja Kocjančič HGEM d.o.o. Zaloška street 43 1000 Ljubljana http://orcid.org/0000-0002-5007-5188
Tomislav Popit University of Ljubljana http://orcid.org/0000-0002-9184-8976
Timotej Verbovšek University of Ljubljana http://orcid.org/0000-0002-1908-5759

DOI:

https://doi.org/10.3986/AGS.4851

Keywords:

mass movement, slope deposits, gravitational carbonate blocks, lidar, Vipava Valley, Slovenia

Abstract

The area of Lokavec in the Vipava Valley, SW Slovenia, consists of Mesozoic carbonates thrust over Paleogene siliciclastic flysch. Overthrusting and tectonic damage of carbonates accelerated their mechanical disintegration. As a result, accumulations of slope gravel and large carbonate gravitational blocks are deposited on the slopes. Based on previous research, basic geological mapping and analysis of the DEM, ten carbonate blocks were identified. The aim of our research was to map lithology, measure and analyse the dip of carbonate strata and to determine transport mechanisms for individual blocks. The displacement of blocks from the source area ranged from 80 m to 1950 m. With the displacement of gravitational blocks, changes in dip direction and dip angle were also observed. The differences between the strata dip of carbonate source area and gravitational megablocks are from 4° to 59°.

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Author Biographies

Maja Kocjančič, HGEM d.o.o. Zaloška street 43 1000 Ljubljana

Hgem d.o.o.

Hydrogeologist

uni. dipl. ing. Geology

dipl. ing. Geotechnology and Mining (UN)

Tomislav Popit, University of Ljubljana

Faculty of Natural Sciences and Engineering
asistant

Timotej Verbovšek, University of Ljubljana

Faculty of Natural Sciences and Engineeringizr. prof.

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