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001-es BibID:	BIBFORM116329
035-os BibID:	(Scopus)85175031969 (WoS)001092105000001 (cikkazonosító)83
Első szerző:	Molnár Kata
Cím:	Unravelling the pre-eruptive conditions of the rhyolitic Šumovit Greben lava dome from clinopyroxene-dominant glomeroporphyritic clots / Kata Molnár, Pierre Lahitte, Boglárka Döncző, Róbert Arató, János Szepesi, Zsolt Benkó, Sebastien Nomade, Jochen Gätjen, Stéphane Dibacto, Marjan Temovski
Dátum:	2023
ISSN:	0010-7999
Megjegyzések:	Detailed analyses of mineral composition and whole-rock geochemical data helped to unravel the volcanic plumbing system beneath the rhyolitic Sumovit Greben lava dome, the westernmost member of the Kozuf-Voras volcanic system (N. Macedonia). It is characterized by high SiO2 content (> 70 wt%) coupled with low MgO (< 1 wt%) and Sr (< 500 ppm) suggesting fractionation of clinopyroxene and plagioclase at depth forming a crystal mush and a crystal-poor rhyolitic lens by fractional crystallization and melt extraction on top of it. The crystal mush is composed of mainly clinopyroxene, biotite and plagioclase, whereas sanidine and plagioclase are the most abundant phenocrysts of the rhyolitic lens. The main dome forming event occurred at ca. 2.9 Ma, which sampled the crystal-poor rhyolitic lens. After a short quiescence time, an explosive eruption occurred depositing a massive lapilli tuff layer northwest of the lava dome, and an extrusion of a small-volume lava flow on the northern side of the lava dome at ca. 2.8 Ma. This latter sampled also the crystal mush, as it contains abundant glomeroporphyritic clots of clinopyroxene +/- plagioclase +/- biotite. The clinopyroxene phenocrysts are chemically homogeneous, their crystallization temperature is ca. 900(degrees)C representing the crystal mush, whereas the plagioclase and the sanidine crystallized at a lower temperature (ca. 790(degrees)C) representing the rhyolitic lens. Noble gas isotopic composition of the clinopyroxene indicate no mantle-derived fluids (< 0.5%) having an R/R-a of ca. 0.04 R-a. The rejuvenation of the system probably occurred due to implementation of mafic magma at depth leading to a heat transfer and partial melting of the cumulate. This led to crystallization of Ba-rich rims of the sanidine and An- and Sr-rich rims of the plagioclase. The crystal mush zone beneath Sumovit Greben might be connected to the nearby, more mafic volcanic centers, and the eruption of Sumovit Greben could have been the start of the last cycle in the lifetime of the Kozuf-Voras volcanic system.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Rhyolite Clinopyroxene Noble gases Volcanic plumbing system Sanidine Ar/Ar dating
Megjelenés:	Contributions To Mineralogy And Petrology. - 178 : 11 (2023), p. 1-17. -
További szerzők:	Lahitte, Pierre Döncző Boglárka (1987-) (biológiatanár-földrajztanár) Arató Róbert Szepesi János Benkó Zsolt (1980-) (geológus) Nomade, Sebastien Gätjen, Jochen Dibacto, Stéphane Temovski, Marjan
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009 GINOP GINOP-2.3.3-15-2016-00029 GINOP
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001-es BibID:	BIBFORM113199
035-os BibID:	(WoS)001007950600001 (Scopus)85161831406 (cikkazonosító)88
Első szerző:	Szepesi János
Cím:	Anthropic Vulnerability of a Hydrothermal Mineral Deposit and Related Mining Heritage, a Case Study from a Medieval Gold-Silver Mining Area, Telkibánya, Hungary / János Szepesi, László Sütő, Tibor József Novák, Zsuzsanna Ésik, Zsolt Benkó, Péter Gruber, Richard William Mcintosh, Szabolcs Harangi, Réka Lukács
Dátum:	2023
ISSN:	1867-2477 1867-2485
Megjegyzések:	The movable geoheritage elements (minerals, fossils, rocks) are important part of geodiversity. Their anthropic vulnerability includes collection by geo-amateurs and professionals which has become a very popular activity in the last decades. The in situ protection of such geoheritage elements preserves their authenticity and integrity, but needs detailed inventory and assessment providing recommendation for geoconservation. The aim of this study is to investigate a medieval mining site of the Carpathians (Telkibánya, Hungary) where recent anthropic vulnerability related to mineral collecting. Earlier works emphasized the scientific, aesthetic, and geo-educational potential of the mineral association and mining heritage of the study area. Our field survey gives a review of medieval mining works and the current state of the surviving infrastructure identifies the major areas of mineral collecting disturbances and the integrity of the main and additional geological elements. Based on the degradation risk assessment, further conservation management initiatives are proposed by open collecting outcrops (exposure sites) and declared protection with controlled collecting (finite sites).
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Vulnerability Mining heritage Mineral collecting Geoconservation Geoethics
Megjelenés:	Geoheritage. - 15 : 3 (2023), p. 1-19. -
További szerzők:	Sütő László (geográfus) Novák Tibor (1973-) (geográfus) Szepesi Éva Zsuzsanna (1975-) (geográfus) Benkó Zsolt (1980-) (geológus) Gruber Péter McIntosh, Richard William (1978-) (geológus) Harangi Szabolcs (1962-) (geokémikus, vulkanológus) Lukács Réka
Pályázati támogatás:	131869 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM103433
035-os BibID:	(Wos)000504511700010 (Scopus)85069878227
Első szerző:	Szepesi János
Cím:	Telkibánya lava domes: Lithofacies architecture of a Miocene rhyolite field (Tokaj Mountains, Carpathian-Pannonian region, Hungary) / János Szepesi, Réka Lukács, Ildikó Soós, Zsolt Benkó, Zoltán Pécskay, Zsuzsanna Ésik, Miklós Kozák, Andrea Di Capua, Gianluca Groppelli, Gianluca Norini, Roberto Sulpizio, Szabolcs Harangi
Dátum:	2019
ISSN:	0377-0273
Megjegyzések:	This work focuses on the Miocene Telkibánya Lava Dome Field (Tokaj Mountains, Hungary), proposed as an example of poorly investigated lithofacies architecture of old silicic lava dome fields. A detailed fieldwork, combined with petrographic and radiometric (K/Ar dating) analyses, allows us the redefinition of the volcano-stratigraphy of a 25 km2 area, and the recognition of two temporary different generation of domes that grew in a subaerial environment. 12 cohesive and autoclastic lithofacies are identified and grouped together to document the internal variability of the domes, as well as the erosional phases that affected the lithofacies architecture. Furthermore, stratigraphy, lithofacies association and morphology allow recognizing the areal distribution of 5 lithosomes (lava flows, coulées or domes). All these findings represent a major breakthrough in the identification and interpretation of the volcanic processes that control the growth of silicic lava domes and their products in Late Miocene environment of Carpathian Pannonian region
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Lava dome/flow stratigraphy Lithofacies analysis Rhyolite Perlite Emplacement
Megjelenés:	Journal Of Volcanology And Geothermal Research. - 385 (2019), p. 179-197. -
További szerzők:	Lukács Réka Soós Ildikó Benkó Zsolt (1980-) (geológus) Pécskay Zoltán (1951-) (geológus) Szepesi Éva Zsuzsanna (1975-) (geográfus) Di Capua, Andrea Groppelli, Gianluca Norini, Gianluca Sulpizio, Roberto Harangi Szabolcs (1962-) (geokémikus, vulkanológus) Kozák Miklós (1948-) (geológus)
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009 ICER GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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