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(Article of periodic en Anglais - 2013)

Document title

Internal structure and permafrost characteristics of the rock glaciers of Southern Carpathians (Romania) assessed by geoelectrical soundings and thermal monitoring

Authors(s) and Affiliation(s)

ONACA A.L. (1) ; URDEA P. (1) ; ARDELEAN A.C. (1) ;
(1) Dept. of Geography, West Univ., Timişoara, ROUMANIE

Abstract

Six rock glaciers in the Southern Carpathians have been investigated by means of geoelectrical soundings in order to detect their internal stratigraphy and the existence of frozen sediments. In the case of 3 relict rock glaciers, the electrical resistivity measurements indicated a typical internal structure. Low resistivity values which are typical of unfrozen fine-grained materials were obtained, but high resistivity values measured in the Pietroasa, Ieşu and Pietrele rock glaciers denote the presence of sediments cemented by interstitial ice and ice lenses. Based on the moderate resistivity values, the ice content is probably low to medium in the upper portion of these rock glaciers. At 2 sites (Pietroasa and Văiuga rock glaciers), ground surface temperature (GST) evolution was monitored using digital dataloggers. Considering the thick active layer, the reduced ice content and the presence of scarce vegetation on their surface it could be assumed that the permafrost exists in marginal conditions in the Southern Carpathians

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2013, vol. 95, no3 [pp. 249-266]

Bibliographic references : 2 p.

Collation : 8 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/geoa.12014

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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