scholarly journals LA-ICP-MS and SIMS U-Pb and U-Th zircon geochronological data of Late Pleistocene lava domes of the Ciomadul Volcanic Dome Complex (Eastern Carpathians)

Data in Brief ◽  
2018 ◽  
Vol 18 ◽  
pp. 808-813 ◽  
Author(s):  
Réka Lukács ◽  
Marcel Guillong ◽  
Axel K. Schmitt ◽  
Kata Molnár ◽  
Olivier Bachmann ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Geochronological Data ◽  
Icp Ms ◽  
Eastern Carpathians ◽  
Lava Domes ◽  
Volcanic Dome

scholarly journals New U-Pb geochronological data on the age of volcanic-plutonic assemblage of Oloy belt, Alazey-Oloy fold system (West Chukotka)

2019 ◽  
Vol 487 (6) ◽  
pp. 653-658
Author(s):  
T. V. Kara ◽  
M. V. Luchitskaya ◽  
S. M. Katkov ◽  
E. A. Belousova
Keyword(s):  
Early Cretaceous ◽  
Late Jurassic ◽  
Volcanic Rocks ◽  
Volcanic Belt ◽  
Geochronological Data ◽  
Fold System ◽  
Hypabyssal Intrusions ◽  
Icp Ms ◽  
Age Limits ◽  
Felsic Volcanic

New U-Pb (SIMS and LA-ICP-MS) geochronological data for rocks of Egdygkych complex of hypabyssal intrusions, Nichan and Vukney plutons, and felsic volcanic rocks and tuffs from host strata of Oloy volcanic belt of Alasey-Oloy fold system are obtained. Concordant ages of Egdygkych complex rocks correspond to Early Cretaceous (Berriasian-Valanginian), those for host strata, to the end of Late Jurassic (Tithonian) - beginning of Early Cretaceous (Berriasian). New U-Pb geochronological data allow confidently to distinguish uniform volcanic-plutonic assemblage of Late Jurassic (Tithonian) - Early Cretaceous (Berriasian-Valanginian) age of Oloy volcanic belt. Obtained data more definitely determine age limits of Au-Mo-Cu mineralization, associated with contacts between rocks of Egdydkych complex and host volcanic-sedimentary rocks or contacts of separated intrusive phases.

scholarly journals Late Pleistocene and Holocene terrestrial geomorphodynamics and soil formation in northeastern Germany: a review of geochronological data

2019 ◽  
Vol 40 (5) ◽  
pp. 405-432 ◽  
Author(s):  
Christoph Kappler ◽  
Knut Kaiser ◽  
Mathias Küster ◽  
Alexander Nicolay ◽  
Alexander Fülling ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Soil Formation ◽  
Geochronological Data ◽  
Northeastern Germany

The Duration and Geodynamics of Formation of the Angara–Vitim Batholith: Results of U–Pb Isotope (LA-ICP-MS) Dating of Magmatic and Detrital Zircons

2021 ◽  
Vol 62 (12) ◽  
pp. 1331-1349
Author(s):  
V.B. Khubanov ◽  
A.A. Tsygankov ◽  
G.N. Burmakina
Keyword(s):  
Drainage Basin ◽  
Detrital Zircons ◽  
Late Paleozoic ◽  
Metamorphic Rocks ◽  
Zircon Geochronology ◽  
Geochronological Data ◽  
Pb Isotope ◽  
Alluvial Deposits ◽  
Detrital Zircon Geochronology ◽  
Icp Ms

Abstract —We present results of U–Pb (LA-ICP-MS) dating of detrital zircons from the alluvial deposits of the Angarakan River (North Muya Ridge, northern Baikal region), whose drainage basin is composed mainly of granitoids of the Barguzin Complex, typomorphic for the late Paleozoic Angara–Vitim batholith (AVB). Three age clusters with peaks at 728, 423, and 314 Ma have been identified in the studied population of detrital zircons. It is shown that small outliers of igneous and metamorphic rocks, probably similar to the large AVB roof pendants mapped beyond the drainage basin, are the source of Neoproterozoic and early Paleozoic zircons. The late Paleozoic cluster comprises two close peaks at 314 and 28 Ma, which totally “overlap” with the time of the AVB formation and mark a granitoid source of the zircons. The results of detrital-zircon geochronology, together with the data on bedrocks, point to the prolonged (~40 Myr) formation of the AVB, but the intensity of magmatism during this period calls for additional study. Based on the analysis of published geological, geochemical, and geochronological data, we assume that the AVB resulted from the plume–lithosphere interaction that began in the compression setting and gave way to extension 305–300 Ma (the Carboniferous–Permian boundary), which caused replacement of “crustal” granitoids by granitoids formed from a mixed mantle–crustal source.

The Geochronology of Tasmanian Tin Deposits Using LA-ICP-MS U-Pb Cassiterite Dating

2021 ◽  
Author(s):  
J. L. Denholm ◽  
A. S. Stepanov ◽  
S. Meffre ◽  
R. S. Bottrill ◽  
J. M. Thompson
Keyword(s):  
Inductively Coupled Plasma ◽  
Detrimental Effect ◽  
Geochronological Data ◽  
The West ◽  
Inductively Coupled ◽  
Potential Source ◽  
Island State ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Tin Deposits

Abstract The island state of Tasmania is the most important tin producer in Australia. The spatial and genetic relationship between Tasmanian tin deposits and Devonian-Carboniferous granites, which intruded throughout the Tabberabberan orogeny, has long been understood. However, little geochronological data is available to link mineralization to nearby intrusions. In this study, we investigate the connection between 19 Tasmanian tin deposits and their potential source granites, using U-Pb cassiterite dating by laser ablation-inductively coupled plasma-mass spectrometry. Archean pegmatitic cassiterite was also characterized and used for the calibration of U-Pb ratios. Tin mineralization in Tasmania occurred between 391 ± 6.3 and 359 ± 7.8 Ma, which is coincident with most postorogenic granites of the Tabberabberan orogeny. In conjunction with the granite ages, cassiterite ages become younger from the east of the state to the west, and tin mineralization occurred over a protracted period spanning 32 m.y. Dating of several placer cassiterite samples produced unexpected results, such as the occurrence of 374 ± 4.7 Ma cassiterite on eastern King Island, an area known only to contain the 350 Ma Grassy granite, suggesting a distant provenance. Tasmanian cassiterite rarely shows evidence of Pb loss; however, some analyses are characterized by elevated Th and U, likely caused by microinclusions such as monazite, which may have a detrimental effect on cassiterite U-Pb dating. This study demonstrates the utility of cassiterite dating for understanding the origin of tin deposits in complex terrains with protracted periods of tin mineralization.

scholarly journals The onset of the volcanism in the Ciomadul Volcanic Dome Complex (Eastern Carpathians): Eruption chronology and magma type variation

2018 ◽  
Vol 354 ◽  
pp. 39-56 ◽  
Author(s):  
Kata Molnár ◽  
Szabolcs Harangi ◽  
Réka Lukács ◽  
István Dunkl ◽  
Axel K. Schmitt ◽  
...  
Keyword(s):  
Magma Type ◽  
Eastern Carpathians ◽  
Volcanic Dome

New constraints on the pre-Alpine evolution of the Austroalpine basement: A LA-ICP-MS U/Pb zircon study on the Schladming nappe

2020 ◽  
Author(s):  
Isabella Haas ◽  
Walter Kurz ◽  
Daniela Gallhofer ◽  
Christoph Hauzenberger
Keyword(s):  
Tectonic Evolution ◽  
Sedimentary Cover ◽  
Eastern Alps ◽  
Major And Trace Elements ◽  
Detrital Zircons ◽  
Geochronological Data ◽  
Origin And Evolution ◽  
Icp Ms ◽  
Austroalpine Basement ◽  
Magmatic Intrusions

<p>The crystalline basement of the Schladming Nappe, Eastern Alps, is part of the Silvretta-Seckau Nappe system. It consists mainly of ortho- and paragneisses which were intruded by slightly overprinted granites and granodiorites. On top of the basement a sedimentary cover (e.g. Rannach Formation) containing quartzites and meta-conglomerates is usually developed.</p><p>In the last decade the Schladming Nappe has not stirred interest as there is no precise geochronological data available and the metagranitoids are assumed to be part of the widespread magmatic intrusions connected to the Variscian orogeny. These general presumptions will be examined by new U/Pb zircon data in order to complete the knowledge of the pre-Alpine and Alpine magmatic and tectonic evolution of the Schladming nappe system. Additionally, major and trace elements geochemistry will provide information on the origin and evolution of the magmatic source.</p><p>In order to better define the sedimentary cover sequence a provenance study including dating of detrital zircons is undertaken. By dating these detrital zircons, the minimum deposition ages of the sedimentary precursor rocks as well as information about the paleogeographic positions of these units will be obtained.</p>

LA-ICP-MS U-Pb geochronology of carbonates from Ag-Bi-Co-Ni-As±U veins in the Erzgebirge (Germany and Czech Republic): New insights into the timing of mineralization

2021 ◽  
Author(s):  
Marie Guilcher ◽  
Richard Albert ◽  
Axel Gerdes ◽  
Jens Gutzmer ◽  
Mathias Burisch
Keyword(s):  
Czech Republic ◽  
Central Europe ◽  
Geodynamic Setting ◽  
Continental Rifting ◽  
Geochronological Data ◽  
Metallogenic Province ◽  
The Czech Republic ◽  
Icp Ms ◽  
First Time

<p>Hydrothermal Ag-Bi-Co-Ni-As±U (five-element) veins are particularly prevalent across Central Europe, where this type of mineralization has been mined throughout the ages for its high-grade resources of Ag, Co, Ni, and U. The timing and the detailed geodynamic setting in which this style of mineralization formed remains, however, insufficiently understood due to the limited amount of geochronological data. In this contribution, we report the results of innovative LA-ICP-MS U-Pb geochronology on the carbonate gangue of Ag-Bi-Co-Ni-As±U mineralization from six districts in the Erzgebirge/Krušné Hory metallogenic province of Germany and the Czech Republic, with the goal to constrain the timing of ore formation in the context of Central Europe's geodynamic framework.</p><p><em>In-situ</em> U-Pb ages of twelve samples, including dolomite-ankerite, calcite, and siderite cogenetic with Co-Ni-Fe-arsenides, range from 129.4 ± 8.2 to 85.93 ± 3.4 Ma. The ages of Ag-Bi-Co-Ni-As±U and fluorite-barite-Pb-Zn veins from the same occurrence (Annaberg-Buchholz district) overlap each other, suggesting that these two styles of mineralization are genetically related and may form coevally. The compilation of geochronological data from other Ag-Bi-Co-Ni-As±U occurrences in Europe suggests that the origin of this style of mineralization in Central Europe can be related to continental rifting associated with the Mesozoic opening of the Atlantic and/or the Alpine Tethys (200-100 Ma). This provides for the first time evidence for the formation of Ag-Bi-Co-Ni-As±U vein mineralization across Central Europe in response to continental rifting.</p>

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