Találati lista | Tudóstér

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
Borító:
Saját polcon: