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Reakcia fluviálneho georeliéfu na tektonický impulz: morfometrický odhad veku zdvihu (prípadová štúdia z oblasti Západných Karpát)

In: Geografický časopis, vol. 72, no. 3
Roberta Prokešová
Detaily:
Rok, strany: 2020, 293 - 313
Jazyk: slo
Kľúčové slová:
fluvial landscape, neotectonic surface uplift, geomorphometric dating, R index, SR index, Western Carpathians
Typ dokumentu: článok/journal
O článku:
The landscape of the Western Carpathians is strongly affected by Pliocene to Quaternary neotectonic movements that have been rarely quantified by numerical dating methods. In this paper, a novel morphometric method proposed by Demoulin is presented. The approach based on the extraction of the composite basin metrics, R index, is efficient to assess the spatial pattern (e.g. differential versus homogeneous) of the last stage of surface uplift (or base-level fall) and can also be used to estimate its age. We tested the efficiency of this method in the area of upper Hron basin where the neotectonic movements are supposed to be. We calculated R index for eighteen Hron sub-catchments initially selected by morphometric criteria, including stream order, catchment size, and the morphology of elementary morphometric indices (i.e. basin hypsometry, basin drainage hypsometry, and mainstream profile). We calculated both, the raw R indexes and R* indexes improved by the catchment shape correction factor. Then, we analysed how the values of “R” indices correlate with catchment area (A). The relatively strong positive correlations of both, R and R* indices with ln(A) point to a homogeneous uplift in the area (except the Rohozná basin). Moreover, as the slope of linear regression R = f(lnA), SR coefficient, is time-dependent, it can provide information about the uplift age. Using the SR indices, we estimated the last uplift phase as ~79 ka (within an error interval 57 – 113 ka). The age is consistent with observed differences in the Middle Pleistocene Hron terrace levels in the study area.
Ako citovať:
ISO 690:
Prokešová, R. 2020. Reakcia fluviálneho georeliéfu na tektonický impulz: morfometrický odhad veku zdvihu (prípadová štúdia z oblasti Západných Karpát). In Geografický časopis, vol. 72, no.3, pp. 293-313. ISSN 0016-7193. DOI: https://doi.org/10.31577/geogrcas.2020.72.3.15

APA:
Prokešová, R. (2020). Reakcia fluviálneho georeliéfu na tektonický impulz: morfometrický odhad veku zdvihu (prípadová štúdia z oblasti Západných Karpát). Geografický časopis, 72(3), 293-313. ISSN 0016-7193. DOI: https://doi.org/10.31577/geogrcas.2020.72.3.15
O vydaní:
Vydavateľ: Geografický ústav SAV/Institute of Geography of the Slovak Academy of Sciences
Publikované: 30. 9. 2020