A multi-system geochronology in the Ad-3 borehole, Pannonian Basin (Hungary) with implications for dating volcanic rocks by low-temperature thermochronology and for interpretation of (U-Th)/He data

Terra Nova ◽  
2015 ◽  
Vol 27 (4) ◽  
pp. 258-269 ◽  
Author(s):  
Martin Danišík ◽  
László Fodor ◽  
István Dunkl ◽  
Axel Gerdes ◽  
János Csizmeg ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pannonian Basin ◽  
Volcanic Rocks

scholarly journals Fluid control on low-temperature mineral formation in volcanic rocks of Kahrizak, Iran

Geofluids ◽  
2012 ◽  
Vol 12 (4) ◽  
pp. 295-311 ◽  
Author(s):  
M. KOUSEHLAR ◽  
T. B. WEISENBERGER ◽  
F. TUTTI ◽  
H. MIRNEJAD
Keyword(s):  
Low Temperature ◽  
Volcanic Rocks ◽  
Mineral Formation ◽  
Fluid Control

scholarly journals Permian felsic volcanic rocks in the Pannonian Basin (Hungary): new petrographic, geochemical, and geochronological results

2019 ◽  
Vol 109 (1) ◽  
pp. 101-125 ◽  
Author(s):  
Máté Szemerédi ◽  
Réka Lukács ◽  
Andrea Varga ◽  
István Dunkl ◽  
Sándor Józsa ◽  
...  
Keyword(s):  
Pannonian Basin ◽  
Volcanic Rocks ◽  
Western Carpathians ◽  
Geochemical Data ◽  
Significant Similarity ◽  
Magmatic Rocks ◽  
Close Relationship ◽  
Felsic Volcanic ◽  
Felsic Volcanic Rocks ◽  
Extensional Setting

AbstractTwo distinct Permian volcanic epochs were revealed in the Pannonian Basin (eastern Central Europe) by U–Pb zircon geochronology: an older one (~ 281 Ma, Cisuralian) in the ALCAPA Mega-unit (Central Transdanubia, Hungary) and a younger volcanic episode (~ 267–260 Ma, Guadalupian) in the Tisza Mega-unit (Southern Transdanubia and the eastern Pannonian Basin, Hungary). The former is represented by dacitic subvolcanic rocks (dykes) and lavas, while the latter is dominantly by crystal-rich rhyolitic–rhyodacitic/dacitic ignimbrites and subordinate rhyodacitic/dacitic lavas. Whole-rock (major and trace element) geochemical data and zircon U–Pb ages suggest close relationship between the samples of Central Transdanubia and volcanic rocks of the Northern Veporic Unit (Western Carpathians, Slovakia), both being part of the ALCAPA Mega-unit. Such correlation was also revealed between the Permian felsic volcanic rocks of the Apuseni Mts (Romania) and the observed samples of Southern Transdanubia and the eastern Pannonian Basin that are parts of the Tisza Mega-unit. The older volcanic rocks (~ 281–265 Ma) could be linked to post-orogenic tectonic movements, however, the youngest samples (~ 260 Ma, eastern Pannonian Basin, Tisza Mega-unit) could be formed in the extensional setting succeeding the post-collisional environment. On the whole, the observed Permian magmatic rocks show significant similarity with those of the Western Carpathians.

Tertiary Volcanic Rocks from the Southern Pannonian Basin, Croatia

1995 ◽  
Vol 37 (3) ◽  
pp. 259-283 ◽  
Author(s):  
Jakob J. Pamić ◽  
Edwin H. Mckee ◽  
Thomas D. Bullen ◽  
Marvin A. Lanphere
Keyword(s):  
Pannonian Basin ◽  
Volcanic Rocks

scholarly journals VOLCANISM OF THE EARLY FORMATION STAGE OF ITURUP ISLAND (GREAT KURILE CHAIN)

2021 ◽  
pp. 87-98
Author(s):  
P.I. Fedorov ◽  
◽  
N.V. Tsukanov ◽  
A.R. Geptner ◽  
V.V. Petrova ◽  
...  
Keyword(s):  
Low Temperature ◽  
Field Strength ◽  
Partial Melting ◽  
Upper Mantle ◽  
High Field ◽  
Middle Miocene ◽  
Volcanic Rocks ◽  
High Field Strength ◽  
Iturup Island ◽  
Formation Stage

The article presents new petrogeochemical data on the Middle Miocene-Pliocene volcanic rocks from central part of Iturup Island (Great Kurile Chain). It is shown that volcanism of the Middle Miocene-Early Pliocene age in the central part of the Iturup Island took place in a suprasubduction setting. The distribution of high field strength elements (HFSE) and their ratio in the basaltoids indicate their formation upon partial melting of the depleted upper mantle, while the enrichment of rocks with large ionic lithophilic elements (LILE) indicates both a fluid mantle additive introduced into the melts during the evolution of primary magma and the participation of a low-temperature suprasubduction fluid. The established differences in the composition of the basaltoids of the frontal and rear zones due to the limited number of analyzed samples are considered preliminary. Thus, basaltoids in the rear zone are distinguished by higher concentrations of Th, Pb, HFSE (Nb, Zr, Y, Hf), relative enrichment in LREE, pronounced negative Zr and Hf anomalies, and positive Eu.

High-Ti magnetite in some fine-grained carbonatites and the magmatic implications

2002 ◽  
Vol 66 (3) ◽  
pp. 379-384 ◽  
Author(s):  
D. K. Bailey ◽  
S. Kearns
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Composition Range ◽  
Volcanic Rocks ◽  
Coarse Grained ◽  
Slow Cooling ◽  
Fine Grained ◽  
Narrow Composition Range ◽  
Fast Quenching ◽  
Temperature Crystallization

AbstractMagnetite is present in most carbonatites, and in the most abundant and best-known form of carbonatite, coarse-grained intrusions, it typically falls in a narrow composition range close to Fe3O4. A fine-grained carbonatite from Zambia contains magnetites with an extraordinary array of compositions (from 18–1% TiO2, 10–2% Al2O3, and 16–4% MgO) outranging previously-reported examples. Zoning trends are from high TiO2 to high Al2O3 and MgO. No signs of exsolution are seen. Checks on similar rocks from Germany, Uganda and Tanzania reveal magnetites with comparable compositions, ranges, and zoning. Magnetites from alkaline and alkaline ultramafic silicate volcanic rocks cover only parts of this array. Magnetite analyses from some other fine-grained carbonatites, reported in the literature, fall in the same composition field, suggesting that this form of carbonatite may be distinctive. The chemistry and zoning would be consonant with rapid high-temperature crystallization in the carbonatite melts, with the lack of exsolution pointing to fast quenching: this contrasts with coarse-grained intrusive carbonatites, in which the magnetite compositions are attributed to slow cooling, with final equilibration at low temperature. In some complexes, both forms of carbonatite, with their different magnetite compositions, are represented.

Permian magmatism in the Carpathian–Panonnian region (Hungary and Romania): New geochronological and geochemical results

2020 ◽  
Author(s):  
Máté Szemerédi ◽  
Réka Lukács ◽  
Andrea Varga ◽  
István Dunkl ◽  
Ioan Seghedi ◽  
...  
Keyword(s):  
Pannonian Basin ◽  
Volcanic Rocks ◽  
Rock Types ◽  
Regional Correlation ◽  
Ne Germany ◽  
Long Time ◽  
Spider Diagrams ◽  
Felsic Volcanic ◽  
Felsic Volcanic Rocks ◽  
European Variscides

<p>In the Carpathian–Pannonian region (Pannonian Basin, Hungary and the Apuseni Mts, Romania) several Late Paleozoic magmatic episodes were revealed by zircon U-Pb geochronology. These events were genetically controlled by a post-collisional to extensional tectonic regime and occurred along the European Variscan Orogenic Belt. Detailed geochronological and geochemical information about the products of this magmatism play crucial role in the regional correlation studies which is the main goal of our research.</p><p>In the Tisza Mega-unit, including southern Transdanubia and the eastern Pannonian Basin (Hungary) as well as the Apuseni Mts (Romania), Permian felsic (dominantly rhyodacitic-dacitic) ignimbrites are common. In the western–central part of the Apuseni Mts, they are accompanied by basaltic and subordinate andesitic lavas, corresponding to a bimodal volcanic suite. Cogenetic plutonic (granites, diorites, gabbros) and subvolcanic rocks (felsic–intermediate dykes) occur in the SW part of the Apuseni Mts, Highiş massif. Immobile element features (REE patterns and multi-element spider diagrams) are similar for all of the aforementioned rock types, suggesting fractional crystallization from a common or similar source. Zircon U-Pb ages of this cogenetic rock assemblage overlap each other and fall within a ~10 Myr long time-span (269–259 Ma, Guadalupian). In contrast to the previous assumptions, the Permian felsic volcanites in the Tisza Mega-unit are not in connection with the granitoid rocks known in the basement of the eastern Pannonian Basin (e.g., Battonya granite). Based on our new data, the granitoids represent a Variscan (~356 Ma, Mississippian) plutonic body.</p><p>The dacitic subvolcanic rocks (dykes) and lavas in the ALCAPA Mega-unit, Central Transdanubia (Hungary) represent an older (~281 Ma, Cisuralian) and geochemically distinct volcanic episode than the magmatism in the Tisza Mega-unit. Associated plutonic rocks, however, are not known in the study area.</p><p>Regarding a broader correlation, the zircon U-Pb ages of the studied Permian plutonic and volcanic rocks of the Tisza Mega-unit are significantly younger than the ages of other well-studied parts of the Central European Variscides (e.g., Intra-Sudetic Basin, NE Germany) where much older ages were identified (300–280 Ma). On the other hand, felsic volcanic rocks of the ALCAPA Mega-unit do not differ from the aforementioned parts of the European Variscides in age. Based on whole-rock geochemistry and zircon geochronology, all of the observed Permian magmatic rocks show similarity with the Permian felsic volcanites of the Western Carpathians (Slovakia). Some further assumptions have been raised: (1) felsic volcanic rocks of the Tisza Mega-unit could correlate with similar rocks of the Southern Gemeric (Vozárová et al. 2009) and Silicic Units (Ondrejka et al. 2018) of the ALCAPA Mega-unit, while (2) the studied samples of Central Transdanubia might be in relationship with the felsic volcanites of the Northern Veporic Unit, ALCAPA Mega-unit (Vozárová et al. 2016). This study was financed by NRDIF (K131690).</p><p>Ondrejka, M., Li, X.H., Vojtko, R., Putiš, M., Uher, P., Sobocký, T. (2018). Geol Carpath 69(2):187–198.</p><p>Vozárová, A., Šmelko, M., Paderin, I. (2009). Geol Carpath 60(6):439–448.</p><p>Vozárová, A., Rodionov, N., Vozár, J., Lepekhina, E., Šarinová, K. (2016). Geol Carpath 61:221–237.</p>

The petrogenesis and origin of the analcime in the volcanic rocks of the Crowsnest Formation, Alberta

1978 ◽  
Vol 15 (1) ◽  
pp. 69-77 ◽  
Author(s):  
L. J. Ferguson ◽  
A. D. Edgar
Keyword(s):  
Experimental Data ◽  
Low Temperature ◽  
Volcanic Rocks ◽  
Crustal Material ◽  
Igneous Origin ◽  
Partial Fusion ◽  
Extensive Exchange ◽  
Inclusion Trails ◽  
Convincing Data ◽  
Differentiation Trend

The Crowsnest Formation consists of trachytes, analcime phonolites and blairmorites, metamorphosed to zeolite facies. The latter rocks contain large analcime phenocrysts variously suggested as being of primary igneous origin or due to transformation from original leucite by reaction of Na-rich fluids. Although neither field relationships or petrography provide convincing data favouring either hypothesis, the presence of primary undisrupted inclusion trails in the analcime tend to support the former hypothesis. Compositions of the analcimes differ from that of an analcime formed by transformation from leucite. The chemistry of the rocks and their constituent pyroxenes are consistent with a sodic rather than a potassic differentiation trend; feldspar and garnet analyses support this conclusion. Oxygen isotope values for the pyroxenes indicate no extensive exchange with a low temperature fluid. Thus it seems unlikely that leucite was ever a constituent of the Crowsnest suite as necessitated by the hypothesis of transformation from leucite. Geochemistry and known experimental data indicate that the analcime phonolites and blairmorites differentiated from a trachytic magma under restricted conditions at depths greater than 25 km by early sanidine and later analcime fractionation. The parental trachyte may be produced by partial fusion of crustal material at depths greater than 35 km.

scholarly journals Almandine Garnet in Calc-alkaline Volcanic Rocks of the Northern Pannonian Basin (Eastern–Central Europe): Geochemistry, Petrogenesis and Geodynamic Implications

2001 ◽  
Vol 42 (10) ◽  
pp. 1813-1843 ◽  
Author(s):  
SZ. HARANGI ◽  
H. DOWNES ◽  
L. KÓSA ◽  
CS. SZABÓ ◽  
M. F. THIRLWALL ◽  
...  
Keyword(s):  
Central Europe ◽  
Pannonian Basin ◽  
Volcanic Rocks ◽  
Calc Alkaline

scholarly journals Lavas or ignimbrites? Permian felsic volcanic rocks of the Tisza Mega-unit (SE Hungary) revisited: A petrographic study

2020 ◽  
Vol 63 (1) ◽  
pp. 1-18
Author(s):  
Máté Szemerédi ◽  
Andrea Varga ◽  
János Szepesi ◽  
Elemér Pál-Molnár ◽  
Réka Lukács
Keyword(s):  
Pannonian Basin ◽  
Volcanic Rocks ◽  
Petroleum Exploration ◽  
Textural Features ◽  
Quartz Porphyry ◽  
Volcanic System ◽  
Felsic Volcanic ◽  
Welding Processes ◽  
Petrographic Study ◽  
Felsic Volcanic Rocks

AbstractPermian felsic volcanic rocks were encountered in petroleum exploration boreholes in SE Hungary (eastern Pannonian Basin, Tisza Mega-unit, Békés–Codru Unit) during the second half of the 20th century. They were considered to be predominantly lavas (the so-called “Battonya quartz-porphyry”) and were genetically connected to the underlying “Battonya granite.” New petrographic observations, however, showed that the presumed lavas are crystal-poor (8–20 vol%) rhyolitic ignimbrites near Battonya and resedimented pyroclastic or volcanogenic sedimentary rocks in the Tótkomlós and the Biharugra areas, respectively. The studied ignimbrites are usually massive, matrix-supported, fiamme-bearing lapilli tuffs with eutaxitic texture as a result of welding processes. Some samples lack vitroclastic matrix and show low crystal breakage, but consist of oriented, devitrified fiammes as well. Textural features suggest that the latter are high-grade rheomorphic ignimbrites.Felsic volcanic rocks in SE Hungary belong to the Permian volcanic system of the Tisza Mega-unit; however, they show remarkable petrographic differences as compared to the other Permian felsic volcanic rocks of the mega-unit. In contrast to the crystal-poor rhyolitic ignimbrites of SE Hungary with rare biotite, the predominantly rhyodacitic–dacitic pyroclastic rocks of the Tisza Mega-unit are crystal-rich (40–45 vol%) and often contain biotite, pyroxene, and garnet. Additionally, some geochemical and geochronological differences between them were also observed by previous studies. Therefore, the Permian felsic volcanic rocks in SE Hungary might represent the most evolved, crystal-poor rhyolitic melt of a large-volume felsic (rhyodacitic–dacitic) volcanic system.The Permian volcanic rocks of the studied area do not show any evident correlations with either the Permian felsic ignimbrites in the Finiş Nappe (Apuseni Mts, Romania), as was supposed so far, or the similar rocks in any nappe of the Codru Nappe System. Moreover, no relevant plutonic–volcanic connection was found between the studied samples and the underlying “Battonya granite.”

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