Találati lista | Tudóstér

001-es BibID:	BIBFORM106600
035-os BibID:	(cikkazonosító)8 (WoS)000926809000001 (Scopus)85146678067
Első szerző:	B. Kiss Gabriella
Cím:	Tracing the Source of Hydrothermal Fluid in Ophiolite-Related Volcanogenic Massive Sulfide Deposits : A Case Study from the Italian Northern Apennines / Gabriella B. Kiss 1, Kata Molnár, Zsolt Benkó, Péter Skoda, Zsuzsanna Kapui, Giorgio Garuti, Federica Zaccarini, László Palcsu, György Czuppon
Dátum:	2022
ISSN:	2075-163X
Megjegyzések:	The Italian Northern Apennines contain several Fe-Cu-Zn-bearing, Cyprus-type volcanogenic massive sulfide (VMS) deposits, which significantly contribute to the Cu resources of Italy. The massive sulfide lenses and related stockwork mineralizations are hosted by several levels (from basalt to serpentinite) of the unmetamorphosed ophiolitic series; therefore, this region offers perfect locations to study the ore-forming hydrothermal system in detail. A combination of fluid inclusion microthermometry, Raman spectroscopy, electron probe analyses (chlorite thermometry) and stable and noble gas isotope geochemistry was used to determine the fluid source of the VMS system at Bargone, Boccassuolo, Campegli, Casali-Monte Loreto, Corchia, Reppia and Vigonzano. This question of the fluid source is the focus of modern VMS research worldwide, as it has a direct influence on the metal content of the deposit. The obtained temperature and compositional data are both in the typical range of VMS systems and basically suggest evolved seawater origin for the mineralizing fluid. Modification of seawater was most commonly due to fluid-rock interaction processes, which happened during long-lasting circulation in the crust. The role of a small amount of magmatic fluid input was traced only at the lower block of Boccassuolo, which may be responsible for its higher ore grade. This fluid origin model is evidenced by O, H and C stable isotopic as well as He, Ne and Ar noble gas isotopic values.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Cyprus-type VMS Italian ophiolite fluid inclusion study stable isotope geochemistry noble gas isotope geochemistry
Megjelenés:	Minerals. - 13 : 1 (2022), p. 1-18. -
További szerzők:	Molnár Kata Benkó Zsolt (1980-) (geológus) Skoda Péter Kapui Zsuzsanna Garuti Giorgio Zaccarini Federica Palcsu László (1975-) (fizikus) Czuppon György
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM118543
035-os BibID:	(WoS)000672816200005 (Scopus)85110397615 (cikkazonosító)120213
Első szerző:	Benkó Zsolt (geológus)
Cím:	Combined petrography, noble gas, stable isotope and fluid inclusion chemistry of carbonatites from Uganda: Implications for the origin of the carbonatite melt in continental rift setting / Zsolt Benkó, Kata Molnár, Tomás Magna, Vladislav Rapprich, Laszló Palcsu, Ondrej Pour, Bohuslava Cejkov, István Futó, György Czuppon
Dátum:	2021
ISSN:	0009-2541
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Chemical Geology. - 578 (2021), p.-. -
További szerzők:	Molnár Kata Magna, Tomáš Rapprich, Vladislav Palcsu László (1975-) (fizikus) Pour, Ondřej Cejková, Bohuslava Futó István (fizikus) Czuppon György
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009 GINOP Bolyai János kutatói ösztöndíj Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

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
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM106604
035-os BibID:	(WoS)000734011500001 (Scopus)85121652725
Első szerző:	Molnár Kata
Cím:	The westernmost Late Miocene-Pliocene volcanic activity in the Vardar zone (North Macedonia) / Kata Molnár, Pierre Lahitte, Stéphane Dibacto, Zsolt Benkó, Samuele Agostini, Boglárka Döncző, Artur Ionescu, Ivica Milevski, Zita Szikszai, Zsófa Kertész, Marjan Temovski
Dátum:	2021
ISSN:	1437-3254
Megjegyzések:	Late Miocene to Pleistocene volcanism within the Vardar zone (North Macedonia) covers a large area, has a wide range in composition, and is largely connected to the tectonic evolution of the South Balkan extensional system, the northern part of the Aegean extensional regime. The onset of the scattered potassic to ultrapotassic volcanism south from the ScutariPeć transverse zone occurred at ca. 8.0 Ma based on this study. Here, we focused on three volcanic centers located on deep structures or thrust faults along the western part of the Vardar zone, for which there is none to very little geochronological and geochemical data available. Pakoševo and Debrište localities are represented as small remnants of lava fows cropping out at the southern edge of Skopje basin and at the western edge of Tikveš basin, respectively. Šumovit Greben center is considered as part of the Kožuf-Voras volcanic system, and it is located on its westernmost side, at the southern edge of Mariovo basin, which is largely composed of volcaniclastic sediments. We present new eruption ages applying the unspiked Cassignol-Gillot K-Ar technique on groundmass, as well as petrological and geochemical data, supplemented with Sr and Nd isotopes to complement and better understand the Neogene-Pleistocene volcanism in the region. Eruption ages on these rocks interlayered between sedimentary formations allow to better constrain the evolution of those sedimentary basins. Rocks from the three volcanic centers belong to the high-K calc-alkaline-shoshonitic series based on their elevated K content. The oldest center amongst these three localities, as well as other Late Miocene centers within the region, is the trachyandesitic Debrište, which formed at ca. 8.0 Ma, and exhibits the highest Nd and lowest Sr isotopic ratios (0.512441-0.512535 and 0.706759-0.706753, respectively). The basaltic trachyandesite Pakoševo center formed at ca. 3.8 Ma and its Nd and Sr isotopic ratios (0.512260 and 0.709593, respectively) bear the strongest signature of crustal contamination. The rhyolitic Šumovit Greben center is a composite volcanic structure formed at ca. 3.0-2.7 Ma. Its youngest eruption unit has a slightly higher Nd and lower Sr isotopic ratios (0.512382 and 0.709208, respectively) representing a magma with a lesser extent of crustal assimilation than the other samples from this center. The overall trend through time in the Sr and Nd isotopic ratios of the Late Miocene to Pleistocene mafc volcanic centers in the region implies an increasing rate of metasomatism of the lithospheric mantle.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Unspiked Cassignol-Gillot K-Ar dating Late Miocene-Pleistocene Volcanism Vardar zone Sr and Nd isotopes
Megjelenés:	International Journal Of Earth Sciences. - 111 : 3 (2021), p. 749-766. -
További szerzők:	Lahitte, Pierre Dibacto, Stéphane Benkó Zsolt (1980-) (geológus) Agostini, Samuele Döncző Boglárka (1987-) (biológiatanár-földrajztanár) Ionescu, Artur Milevski, Ivica Szikszai Zita (1969-) (fizikus) Kertész Zsófia (1971-) (fizikus) Temovski, Marjan
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009 GINOP TÉT-FR-2018-00018 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: