Rastislav VojtkoComenius University Bratislava · Department of Geology and Paleontology
Rastislav Vojtko
PhD
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83
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Introduction
Additional affiliations
December 2012 - present
February 2004 - November 2012
Comenius University in Bratislava
Position
- Professor (Assistant)
October 1999 - January 2004
Publications
Publications (83)
The Muráň fault is perhaps the most distinctive, steeply-dipping, brittle structure in the Western Carpathians. An analysis of brittle deformation was used to gain the succession of tectonic evolution of the Muráň fault by paleostress tensors. Movement on this fault depended on spatial orientation of the principal paleostress axes representing the...
The depositional record of intermontane basins provides a valuable archive of the temporal evolution of orogenic belts; their common isolated nature may, however, hinder the efficient usage of standard approaches to constrain the age of a basin fill. In this paper the authigenic 10Be/9Be dating method is employed and tested to construct an age mode...
Každý výskum so sebou prináša nekonečné množstvo otázok na skúmaný objekt. Pochopiť príčinu vzniku a vývoja objektu sa snažíme pomocou jednoduchej, ľuďom vlastnej schopnosti, ktorou je pozorovanie. Každý výskum sa začína kladením si otázok typu: Čo to je? Ako to vzniklo? S čím to súvisí? Aké procesy formovali objekt? Prečo to má také vlastnosti, ak...
Long-term research of the Vienna Basin (Central Europe) has resulted in multiple stratigraphic concepts, though these are at least in part mutually exclusive. This contribution aims to reconsider the available information on the northeastern Vienna Basin, located in Slovakia, to create a consistent stratigraphic model. Lithostratigraphic correlatio...
The Nízke Tatry Mts. is a significant mountain range in the middle part of the Central Western Carpathians which is divided into two important sub-units, the eastern part is composed of the Veporic crystalline basement (Kráľovohoľské Tatry), which is thrust onto the Tatric crystalline basement (Ďumbierske Tatry) located in the western part during t...
This study presents petrological, geochemical, geochronological and structural data that serve to identify two different Alpine tectonic units formed from the Variscan-aged Tribeč-Zobor granitic rocks. The proposed model for juxtaposition of two granite blocks in the Tribeč-Zobor basement during the Alpine orogeny is based on the degree of granite...
The data included in this article specify the characteristics of the Upper Miocene fill of the Turiec Basin and served for reconstruction of temporal evolution of depositional systems in this intermontane basin located within the Western Carpathians (Central Europe). The borehole lithological log data were used to describe the stratigraphy of the T...
The depositional record of intermontane basins provides a valuable archive of the temporal evolution of orogenic belts; their common isolated nature may, however, hinder the efficient usage of standard approaches to constrain the age of a basin fill. In this paper the authigenic 10Be/9Be dating method is employed and tested to construct an age mode...
The depositional record of intermontane basins provides a valuable archive of the temporal evolution of orogenic belts; their common isolated nature, however, hinders the efficient usage of standard approaches to constrain the age of a basin fill. In this paper the authigenic 10Be/9Be dating method is employed to construct an age model of the exist...
The principle of authigenic 10Be/9Be dating method is similar to any other radiometric dating method which utilizes the equation N=N0 e-λt. However, the different source of the isotopes 9Be (from weathering of rock massifs) and 10Be (from atmosphere, through spallation reaction) brings some difficulties in direct application of the authigenic 10Be/...
The kinematic evolution of the Western Carpathian and Eastern Alpine orogenic belts shows similarities but also differences. In both orogens Eo-Alpine (Cretaceous) deformation is prevalent in the internal southeastern part, whereas nappe stacking in the northern frontal part occurred during the Neo-Alpine (Cenozoic) phase, which caused also back th...
Two representative peraluminous A-type rhyolite samples from the Poniky area (the Drienok Nappe) in the Inner Western Carpathians (central Slovakia) were dated using the LA-ICP-MS U-Pb zircon method. These geochronological data represent the first in-situ isotopic dating study undertaken on these volcanic rocks. Oscillatory zoned zircon crystals yi...
This study aimed at the magnetostratigraphic age assignment of a 100-m-long drill core penetrating the Miocene lake sediments of the intramontane Turiec Basin of the Inner Western Carpathians and obtaining paleomagnetic constraints for the orientation of the basin during its development. Concerning the azimuthally nonoriented drill core, we documen...
The territory of Slovakia is located in Central Europe and is built up by the Western Carpathian mountain range to the north and the overstepping Cenozoic Basin system in the central and southern parts. The Western Carpathians are an integral part of the northern branch of the Carpathian arc and the whole European Alpine orogenic system, which was...
Presented research investigate the phenomenon of karstic area remarkable with specific karst landform, so�called covered karst. So far, not much attention has been paid to this particular type of karst in Slovakia, so the aim of the research is to bring new information on it, especially on dolines formation and their origin. Study was focused on 50...
The Finsterort and Anton vein system is located in the central zone of the Middle Miocene Štiavnica Stratovolcano between Vyhne and Hodruša-Hámre villages. The vein system contains several partial veins and veinlets and has generally NNE - SSW strike with moderate to steep eastward dip. Kinematics of the veins is characterised by older dextral stri...
Slovakia is rich in the Pliocene, Pleistocene travertines and Holocene tufas and travertines, which were studied in 82 localities. Travertines are developed in the spring mounds (49 %) with central orifices frequently in crater-like forms. Fissure ridges (6 %) with vertical veins were identified. A few mounds and ridges were connected to large coal...
The abandoned deposit Dobšiná in eastern Slovakia used to be exploited for Ni-Fe-Co sulfarsenides in siderite-ankerite hydrothermal veins. These veins are locally accompanied by alteration zones of fuchsite-quartz-carbonate rocks. The Ni-Fe-Co sulfarsenides are postdated by chalcopyrite and tetrahedrite. This work aims to determine the age of these...
The Plavecký Karst is located in the northern part of the Malé Karpaty Mts. and is exclusively linked to a diverse type of Triassic carbonates of the Hronic Unit, which forms the complex higher nappe system of the Central Western Carpathians. The Plavecký Karst has well-developed underground and surface karstic forms; however, the most typical land...
The Kuchyňa tuff is found on the Eastern margin of the Vienna Basin and was formed by felsic volcanism.
The Ar/Ar single grain sanidine method was applied and resulted in an age of 15.23 ± 0.04 Ma, which can be interpreted
as the age of the eruption. The obtained numerical age is in accordance with the subtropical climate inferred by
the presence o...
Late Badenian to Quaternary palaeostress evolution of the northeastern part of the Danube Basin and the southwestern slope of the Štiavnica Stratovolcano (Slovakia) Abstract: The Danube Basin, located among the Eastern Alps, Western Carpathians, and Transdanubian Range, covers northwestern part of the Pannonian Basin. The basin is represented by ty...
This paper investigates and refines the complicated Alpine geological structure and the division of lithostratigraphic sequences in the Vernár village locality. Herein we used field geological methods including geological mapping, structural observation and sample analysis. The study area is located in the Pusté Pole area (Vernár village) and at th...
The study area is located between Hrušovo and Striežovce villages in the Rimavská Sobota district and is characterized by the occurrence of anchimetamorphosed siliciclastic, carbonate and pelagic deposits. This structure was differently interpreted in the past, when these rocks were included into either the Meliata or Turňa tectonic units. Based on...
The Au-Ag-Pb-Zn-Cu epithermal deposit Banská Hodruša of intermediate-sulphidation type is located in the Middle Miocene Štiavnica stratovolcano on the inner side of the Carpathian arc in Slovakia. This deposit represents an unusual subhorizontal multi-stage vein system, related to processes of underground cauldron subsidence and exhumation of a sub...
The opening and evolution of the Western Carpathians Miocene basins was closely related to the north-eastward tectonic extrusion of the ALCAPA Mega-Unit lithosphere caused by the final stage of collision of the Eastern Alpine–Western Carpathian orogenic system with the European Platform and Alpine convergence with the Adria plate. The roll back eff...
Three representative A-type rhyolitic rock samples from the Muráň Nappe of the inferred Silicic Unit of the Inner Western Carpathians (Slovakia) were dated using the high-precision SIMS U-Pb isotope technique on zircons. The geochronological data presented in this paper is the first in-situ isotopic dating of these volcanic rocks. Oscillatory zoned...
Zircon and apatite fission track (FT) and morphotectonic analyses were applied in order to infer quantitative constraints on the Alpine morphotectonic evolution of the western part of the Southern Veporic Unit which is related to: (1) Eo-Alpine Cretaceous nappe stacking and metamorphism of the crystalline basement in the greenschist facies. (2) Exh...
The data on the Neogene geodynamics, palaeogeography, and basin evolution of the Western Carpathians, Northern Pannonian domain and adjoining areas (ALCAPA Mega-unit) are summarized, re-evaluated, supplemented, and newly interpreted. The proposed concept is illustrated by a series of palinspastic and palaeotopographic maps. The Miocene development...
Základná hydrogeologická a hydrogeochemická mapa Muránske} planiny v mierke l : 50 000 zahŕňa územie s výskytom mezozoických hornín všetkých tektonických jednotiek Muránskej planiny spolu s ich sedimentárnym podložím. Vymedzená oblasť zahŕňa vlastnú Muránsku planinu, Tisovský kras a kučelašskú trosku na severozápade. Základný dokumentačný materiál...
The tectonic evolution of the pre-Cenozoic basement, as well as the Cenozoic structures within the Danube Basin (DB) and its northern periphery are presented. The lowermost portion of the pre-Cenozoic basement is formed by the Tatricum Unit which was tectonically affected by the subduction of the Vahicum / Penninicum distal continental crust during...
The Cretaceous to Palaeogene Alpine exhumation of previously buried Variscan basements is recorded in the southern portion of the Western Carpathians in the Gemeric and Veporic units. The Meso-Cenozoic collisional processes resulted in basement exhumation of the Tatric Unit from Palaeogene to Neogene times. According to zircon and apatite fission t...
The boundary between the Central Western Carpathians and the Northern Pannonian Domain – two crustal fragments with a different geodynamic provenance is represented by the Hurbanovo–Diösjenő Fault. The fault itself is located in the northern edge of the Transdanubian Unit and is covered by the relatively thick Neogene to Quaternary fill of the Danu...
The Turňa Unit (Turnaicum, Tornaicum) is one of the three nappe systems involved in the geological structure of the inner zones of the Western Carpathians. The unit is formed by a system of partial nappes and duplexes, which overlie the Meliata Unit s.l. and are overridden by the Silica Nappe. The Slovenská skala partial nappe in the investigated a...
The study area is located in the eastern part of Veporské vrchy Mts. and is composed of several palaeo-Alpine tectonic units which are sealed by Cenozoic formations and volcanites. The palaeo-Alpine units differ by degree of metamorphism, deformation, age, and lithological composition. The Vepor Unit, which consists of metamorphosed Variscan crysta...
The Tatra Mts area, located in the northernmost part of Central Western Carpathians on the border between Slovakia and Poland, underwent a complex Alpine tectonic evolution. This study integrates structural, sedimentary, and geomorphological data combined with fission track data from the Variscan granite rocks to discuss the Cretaceous to Quater- n...
The paper presents neotectonic interpretation of the Pravno fault in the Horná Nitra Basin and the Žiar Mts. which is located in central Slovakia. The investigated area, belonging to the Tatra-Fatra Belt, has complicated structure and can be characterized by Neogene horst-and-graben faulting. The Pravno fault is the tectonic structure of the NW–SE...
The paper describes the application of geophysical prospecting
techniques for estimation of the fault's inclination. The field survey
was carried out across the Muráň fault structure in the
Slovenské rudohorie Mts (central Slovakia). Three different
geophysical methods were used to map the fault zone: Electrical
Resistivity Tomography (ERT), induce...
Reconstruction of the Cenozoic palaeostress fields in the western part of Hornád Depression, south of Poprad town, was the main goal of the research. This was done on the basis of analysis of fault-slips. The most important was the detailed study of fault-slip kinematics. The deformation structures were measured and recorded in the Permian volcanos...
Some essential features of the Western Carpathian (and adjacent regions)
lithosphere and land surface were created simultaneously in the Neogene
and Quaternary. Synthesis of published as well as new geophysical,
sedimentological, thermochronological and geomorphological data provide
following results: Our newest morphostructural division and modell...
This study investigates the influence of neotectonic activity on river and basin patterns in a mountainous area located in the northeastern part of the Carpathian Belt (the Laborecká vrchovina and Bukovské vrchy Mts. in eastern Slovakia). This area evolved within the accretionary wedge of the Carpathians during the Neogene, and it was alsowas affec...
The evolution of the Central Carpathian Paleogene Basin (CCPB) reflects an important role of relative sea level changes on a tectonically active basin margin. After the initial upper Lutetian/Bartonian transgression, the next regressive-transgressive cycle played a key role in a formation of the late Eocene fan delta facies associations in the sout...
The structure of the klippen belt represents the recent contact between the externides and the internides of the Western Carpathians. Varín and Orava segments comprise mostly part of the northern segment of the klippen belt in the Slovakia. The double-vergent structure were originated during the continental collision of the European platform and th...
The development of the northern Danube Basin (nDB) was closely related
to the Late Miocene geodynamic evolution of the Pannonian Basin System.
It started with a wide rifting which led to subsidence of several basin
depocenters which were gradually filled during the Late Miocene and
Early Pliocene. In the Late Pliocene the subsidence continued only...
The Cenozoic structure of the Western Carpathians is strongly controlled
by faults. The E-W striking Vikartovce fault is one of the most
distinctive dislocations in the region, evident by its geological
structure and terrain morphology. This feature has been assumed to be a
Quaternary reactivated fault according to many attributes such as its
perfe...
Pliocene to Quaternary tectonics in the Horná Nitra Depression (Western Carpathians)
The Horná Nitra Depression is an Upper Miocene-Quaternary intramontane sedimentary basin. This N-S elongated half-graben structure is rimmed from the west by the marginal Malá Magura fault which is the most distinctive fault in the Horná Nitra Depression, tradition...
Neogene and Quaternary development of the Turiec Basin and landscape in its catchment: a tentative mass balance model
The development of the Turiec Basin and landscape evolution in its catchment has been reconstructed by methods of geological research (structural geology, sedimentology, paleoecology, and geochronological data) as well as by geophys...
The Pohorelá line (PL) is an important tectonic element dividing the major pre-Cenozoic lithotectonic units of the Northern and Southern Veporicum. Moreover, the PL separates occurrences of the Gemericum, Meliaticum and Silicicum on its S–SE side against the Fatricum and Hronicum on NW side. Continuation of the PL towards the SW was unknown because...
The origin of elevation structure of the Cerová Vrchovina Mts. was connected with active uplift caused by upwelling of a pre-Cenozoic basement or bulging due to volcanic activity during the Pliocene and Pleistocene. The erosion-denudation processes and changing tectonic regime with reorientation of the main tension axes from NW–SE to NE–SW are cons...
The Strážovské vrchy Mts. are located in the western part of the Western Carpathians. The studied area between the villages Valaská Belá and Čierna Lehota is predominantly built by the Fatric Unit with complicated tectonic structure. The paleogeographical domain of the Fatric Unit was located between the Tatric and Veporic realms and had a rhombic-...
Reconstruction of Cenozoic paleostress fields and revised tectonic history in the northern part of the Central Western Carpathians (the Spišská Magura and Východné Tatry Mountains)
This study investigates the chronology of paleostress evolution and faulting in the northern part of the Central Western Carpathians (Spišská Magura and Východné Tatry M...
V každodennom živote na nás ešte nedolieha jeho spätosť so satelitnými technológiami a využívaním údajov zo satelitov, no v publikácii Slovensko očami satelitov v popularizačnej edícii Svet vedy sú súvislosti technológii s bežným životom zjavné.
Kolektív autorov pod vedením Jána Feranca poukazuje na históriu poznávania našej planéty prostredníctvom...
The Sudetic Marginal Fault (SMF) separates the Fore-Sudetic block on the NE and the Sudetic block on the SW of Bohemian Massif. The fault slip data along the SMF yielded two different subhorizontal orientations of the maximum stress axes. The NE–SW oriented compression was computed in the Fore-Sudetic block, while the NNW–SSE compression is recorde...
The Hronská pahorkatina highland belongs to the particular morphostructures of the north-eastern part of DanubeBasin with the typical pattern of fluvial valleys. Orientation and character of the fluvial valleys together with brittle disruptionsof the Pliocene sediments has been object of the morphotectonic and structural analysis. Transversal asymm...
Conference title - 8 vyrocny predvianocny seminar Slovenskej geologickej spolocnosti; Nove poznatky o stavbe a vyvoji Zapadnych Karpat, Copyright - GeoRef, Copyright 2012, American Geosciences Institute., Date revised - 2010-01-01, Language of summary - Undetermined, Pages - 537, ProQuest ID - 762681974, SubjectsTermNotLitGenreText - andesites; are...
The northern part of theWestern Carpathians suffered polyphase deformation at the boundary between their Central and Outer parts. Palaeostress analysis in the Orava region revealed the existence of five different stress fields in the period from the Late Eocene to the Quaternary. The evolution of the stress fields was determined by detailed structu...
An effective solution of neotectonic problems requires an interdisciplinary approach. In this paper, we present the frame of geomorphological approaches, which can contribute to understanding of the neotectonic problems. Various geomorphological methods (including morphometric analysis of the relief forms, analysis of morphotectonic lines, patterns...
V článku sú opisované hydrogeologické pomery Tisovského krasu na základe hydrogeologickej klasifikácie jednotlivých litostratigrafických jednotiek podľa merného odtoku podzemných vôd vo forme prameňov. K hlbšiemu obehu podzemných vôd dochádza predovšetkým v stredno- a vrchnotriasových karbonátových horninách silicika. Tieto sú zároveň z hľadiska vy...