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001-es BibID:	BIBFORM125719
035-os BibID:	(Scopus)85202158044 (WOS)001308049700007
Első szerző:	Temovski, Marjan
Cím:	Constraining the evolutionary stages of a hypogene karst system by combining morphological, geochemical and geochronological data - the example of carbonate breccia-hosted Melnička Peštera / Temovski, Marjan; Ruszkiczay-Rüdiger, Zsófia; Molnár, Kata; Rinyu, László; Wieser, Alexander; Marchhart, Oscar; Palcsu, László
Dátum:	2024
ISSN:	0392-6672 1827-806X
Megjegyzések:	A combination of morphological observations, geochemical data from calcite minerals and geochronology by burial age dating and U-series is used to constrain the geological and geomorphological setting and the evolutionary stages of a hypogene karst system. This methodological suit is applied to Melni?cka Pe?stera, a horizontal cave developed in carbonate breccia overlying dolomite marble in Melnica locality (N. Macedonia), where hydrothermal karst development occurred in both dolomite and calcite marble. The passage morphology of the cave, having a reverse triangle, Laughöhle cross-sections, suggests development near the water table by slowly moving waters. Calcite crusts are found throughout the cave, and based on their relationship to passage morphology, appear to pre-date main horizontal passage formation. Their carbonate stable and clumped isotope and fluid inclusion noble gas compositions indicate cooling of the hydrothermal system with an increased contribution of shallower groundwater. U-series data suggests Early Pleistocene deposition of the calcite crusts. Water table notches and convectional features carved into breccia bedrock and calcite crusts point to subsequent development at and above the water table by condensation corrosion. The solutional aggressiveness near the water table was likely related to CO2, that previously degassed from the deeper parts of the system where calcite was depositing, and redissolved in the cooler, shallower waters. Due to poor connection with the surface, the cave air above the water table likely had high pCO2, that further helped to maintain aggressiveness of the groundwater at the water-air contact, and boosted condensation corrosion above it, preventing deposition of related secondary calcite minerals. The cave-hosting carbonate breccia deposited as an alluvial fan filling up a paleovalley cut into Upper Miocene sediments. Cosmogenic nuclide burial age dating of quartz fragments confirms Early Pliocene age for the breccia, and constrains the paleovalley incision to Late Miocene, likely related to base level lowering caused by the Messinian Salinity Crisis. - 2024, Societa Speleologica Italiana. All rights reserved.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk burial age dating hydrothermal speleogenesis Mariovo noble gases stable isotopes
Megjelenés:	International Journal of Speleology. - 53 : 2 (2024), p. 169-190. -
További szerzők:	Ruszkiczay-Rüdiger Zsófia Molnár Kata Rinyu László (fizikus) Wieser, Alexander Marchhart, Oscar Palcsu László (1975-) (fizikus)
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009 GINOP FK 124807 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM120640
035-os BibID:	(WoS)001125462000001 (Scopus)85181740627
Első szerző:	Temovski, Marjan
Cím:	Pleistocene valley incision, landscape evolution and inferred tectonic uplift in the central parts of the Balkan Peninsula : Insights from the geochronology of cave deposits in the lower part of Crna Reka basin (N. Macedonia) / Temovski, Marjan; Wieser, Alexander; Marchhart, Oscar; Braun, Mihály; Madarász, Balázs; Kiss, Gabriella Ilona; Palcsu, László; Ruszkiczay-Rüdiger, Zsófia
Dátum:	2024
ISSN:	0169-555X
Megjegyzések:	Although the general geomorphology is reasonably well understood, not much information is available on the incision rates of rivers and related tectonic uplift in the central parts of the Balkan Peninsula. Caves in the lower part of Crna Reka drainage (N. Macedonia) provide the possibility to reconstruct the Neogene-Quaternary evolution of this area, as previous research has identified two major cave development phases: one related to Pliocene-Early Pleistocene basin infilling and establishment of lacustrine environments, and a subsequent cave development phase related to valley incision due to draining of the lacustrine systems and tectonic uplift. Here, we present new geochronological data obtained by U-Th dating on speleothems and cosmogenic nuclide burial age determination of clastic cave sediments, that provide time constraints on the Pleistocene karst and valley evolution, and an insight into the related tectonic uplift. The obtained cosmogenic nuclide burial age (2.1 +/- 0.5 Ma) of the clastic cave sediments from Temna Pestera - Dragozel, further supports previous results on placing the onset of the draining of the Pliocene lakes in Macedonia in the Early Pleistocene. The similar timing obtained for the downstream and upstream parts of Crna Reka drainage suggests that the draining was more likely initiated by regional uplift, rather than headward erosion related to subsidence in the Aegean Sea. The Middle to Late Pleistocene age of the dated speleothems agrees well with the existing conceptual model for karst and landscape evolution in the area. The cumulative valley incision rates based on these radiometric data show an increase towards the present, with values of <0.1 m/ka in Early Pleistocene, increasing to similar to 0.2-0.5 m/ka in Middle Pleistocene, and up to 1 m/ka in Late Pleistocene. They are lower than the measured uplift rates in the area (1.1-1.2 m/ka), and mostly overlap with the range of GPS-based vertical deformation rates in the Hellenides. Higher Middle to Late Pleistocene uplift rate is inferred in the downstream part of Crna Reka, an area in the Vardar zone bounded by seismogenic faults, than in the upstream part, at the easternmost edge of the Pelagonian massif.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Geomorphology. - 445 (2024), p. 1-19. -
További szerzők:	Wieser, Alexander Marchhart, Oscar Braun Mihály (1966-) (vegyész, analitikus) Madarász Balázs Kiss Gabriella Ilona (1992-) (vegyész) Palcsu László (1975-) (fizikus) Ruszkiczay-Rüdiger Zsófia
Pályázati támogatás:	OTKA FK 124807 OTKA GINOP-2.3.2-15-2016-00009 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: