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)

Lukács, Réka; Guillong, Marcel; Schmitt, Axel K.; Molnár, Kinga; Harangi, Szabolcs

doi:10.1016/j.dib.2018.03.100

Cited by 10 publications

(9 citation statements)

References 20 publications

(20 reference statements)

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“…This is consistent with the presence of a still-degassing magma below the Ciomadul system as inferred by geophysical investigations that recognized a low-resistivity and low-velocity anomaly in the crust, below the volcano (Harangi, Novák, et al, 2015;Popa et al, 2012) as well as petrologic observations suggesting the involvement of a mafic magma in the petrogenesis of the erupted dacite (Kiss et al, 2014). The measurements of U-Th and U-Pb spot ages on zircons suggest a long-standing magma storage that could go back as far as about 350 ka Lukács et al, 2018). Molnár et al (2018Molnár et al ( , 2019 presented a detailed eruption chronology for the Ciomadul lava dome field involving the Ciomadul volcanic complex and emphasized that volcanic activity could be renewed even after long (>100 kyr) repose times.…”

Section: 1029/2018gc008153mentioning

confidence: 79%

Noble Gas and Carbon Isotope Systematics at the Seemingly Inactive Ciomadul Volcano (Eastern‐Central Europe, Romania): Evidence for Volcanic Degassing

Kis

Caracausi

Palcsu

et al. 2019

Geochem Geophys Geosyst

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Ciomadul is the youngest volcano in the Carpathian‐Pannonian Region, Eastern‐Central Europe, which last erupted 30 ka. This volcano is considered to be inactive, however, combined evidence from petrologic and magnetotelluric data, as well as seismic tomography studies, suggests the existence of a subvolcanic crystal mush with variable melt content. The volcanic area is characterized by high CO2 gas output rate, with a minimum of 8.7 × 103 t/year. We investigated 31 gas emissions at Ciomadul to constrain the origin of the volatiles. The δ13C–CO2 and 3He/4He compositions suggest the outgassing of a significant component of mantle‐derived fluids. The He isotope signature in the outgassing fluids (up to 3.10 Ra) is lower than the values in the peridotite xenoliths of the nearby alkaline basalt volcanic field (R/Ra 5.95 Ra ± 0.01), which are representative of a continental lithospheric mantle and significantly lower than MORB values. Considering the chemical characteristics of the Ciomadul dacite, including trace element and Sr–Nd and O isotope compositions, an upper crustal contamination is less probable, whereas the primary magmas could have been derived from an enriched mantle source. The low He isotopic ratios could indicate a strongly metasomatized mantle lithosphere. This could be due to infiltration of subduction‐related fluids and postmetasomatic ingrowth of radiogenic He. The metasomatic fluids are inferred to have contained subducted carbonate material resulting in a heavier carbon isotope composition (δ13C is in the range of −1.4‰ to −4.6‰) and an increase of CO2/3He ratio. Our study shows the magmatic contribution to the emitted gases.

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Section: 1029/2018gc008153mentioning

confidence: 79%

Noble Gas and Carbon Isotope Systematics at the Seemingly Inactive Ciomadul Volcano (Eastern‐Central Europe, Romania): Evidence for Volcanic Degassing

Kis

Caracausi

Palcsu

et al. 2019

Geochem Geophys Geosyst

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“…Cathodoluminescence (CL) images of zircon grains were acquired to evaluate magmatic zoning, metamorphic origin or inherited cores in a Vega 3 scanning electron microscope (SEM) at the scientific center for optical and electron microscopy (ScopeM) at ETH Zurich. In situ U-Pb geochronology were conducted by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) at the Institute of Geochemistry and Petrology at ETH Zurich using a 193 nm Resolution (S155) ArF excimer laser coupled to a Element SF ICPMS (Guillong et al, 2014;Von Quadt et al, 2014). Laser ablation spots (19 microns) were selected in both cores and rims when it was possible.…”

Section: Detrital Zircon U-pb Geochronologymentioning

confidence: 99%

A Middle to Late Miocene Trans-Andean Portal: Geologic Record in the Tatacoa Desert

et al. 2021

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Integration of several geologic lines of evidence reveals the prevalence of a lowland trans-Andean portal communicating western Amazonia and the westernmost Andes from at least middle Miocene until Pliocene times. Volcanism and crustal shortening built up relief in the southernmost Central and Eastern Cordilleras of Colombia, closing this lowland gap. Independent lines of evidence consist first, of field mapping in the Tatacoa Desert with a coverage area of ∼381 km2, 1,165 km of geological contact traces, 164 structural data points, and 3D aerial digital mapping models. This map documents the beginning of southward propagation of the southernmost tip of the Eastern Cordillera’s west-verging, fold-and-thrust belt between ∼12.2 and 13.7 Ma. Second, a compilation of new and published detrital zircon geochronology in middle Miocene strata of the Tatacoa Desert shows three distinctive age populations: middle Miocene, middle Eocene, and Jurassic; the first two sourced west of the Central Cordillera, the latter in the Magdalena Valley. Similar populations with the three distinctive peaks have now been recovered in western Amazonian middle Miocene strata. These observations, along with published molecular and fossil fish data, suggest that by Serravallian times (∼13 Ma), the Northern Andes were separated from the Central Andes at ∼3°N by a fluvial system that flowed into the Amazon Basin through the Tatacoa Desert. This paleogeographic configuration would be similar to a Western Andean, or Marañon Portal. Late Miocene flattening of the subducting Nazca slab caused the eastward migration of the Miocene volcanic arc, so that starting at ∼4 Ma, large composite volcanoes were built up along the axis of today's Central Cordillera, closing this lowland Andean portal and altering the drainage patterns to resemble a modern configuration.

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“…These images were used to determine ideal locations for analysis. The mounts were cleaned in ethylenediaminetetraacetic acid (EDTA) disodium salt dehydrate (C 10 H 14 N 2 Na 2 O 8 .2H 2 O) followed by methanol and distilled water to reduce the potential for common Pb contamination (Lukács et al 2018). Mounts were coated in gold and dated.…”

Section: Methodsmentioning

confidence: 99%

Late Silurian zircon U–Pb ages from the Ludlow and Downton bone beds, Welsh Basin, UK

Catlos

Mark

Suarez

et al. 2020

JGS

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The Ludlow Bone Bed (Welsh Basin) is a critical stratigraphic horizon and contains a rich assemblage of fish scales. Units above provide insights into the early evolution of animal and plant life. The bed has not yet been radioisotopically dated. Here, we report 207 secondary ion mass spectrometry (SIMS) ages from 102 zircon (ZrSiO4) grains from the Ludlow (n = 2) and stratigraphically higher Downton (n = 1) bone beds. SIMS ages are middle Ordovician (471.6 ± 20.7 Ma) to late Devonian (375.7 ± 14.6 Ma, 238U–206Pb, ±1σ analytical uncertainty). Cathodoluminescence images show that the youngest ages appear affected by alteration. Chemical abrasion isotope dilution thermal ionization mass spectrometry (CA-ID-TIMS) U–Pb geochronology was utilized to improve precision. Detrital zircon grains from Downton yield 424.91 ± 0.34/0.42/0.63 Ma and from Ludlow 424.85 ± 0.32/0.41/0.62 Ma (n = 5 each, 238U–206Pb, ±2σ analytical, tracer or systematic uncertainty). These ages provide a maximum deposition age. Results overlap the basal Přídolí age (423.0 ± 2.3 Ma) in its stratotype (Požáry Section, Reporyje, Prague, Czech Republic). The Ludlow Bone Bed marks the base of the local Downton Group, which has previously been correlated with the base of the Přídolí Series. The CA-ID-TIMS ages are older than those for other land arthropod-bearing sediments, such as the Cowie Harbour Fish Bed and Rhynie Chert.Supplementary material: An Excel file containing detailed information on the SIMS analyses, a figure showing calibration curves for AS3 standards sputtered over sessions 1 and 2, and a figure showing CA-ID-TIMS U–Pb age data (concordia and weighted mean plots) are available at https://doi.org/10.6084/m9.figshare.c.5087031

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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)

Cited by 10 publications

References 20 publications

Noble Gas and Carbon Isotope Systematics at the Seemingly Inactive Ciomadul Volcano (Eastern‐Central Europe, Romania): Evidence for Volcanic Degassing

Noble Gas and Carbon Isotope Systematics at the Seemingly Inactive Ciomadul Volcano (Eastern‐Central Europe, Romania): Evidence for Volcanic Degassing

A Middle to Late Miocene Trans-Andean Portal: Geologic Record in the Tatacoa Desert

Late Silurian zircon U–Pb ages from the Ludlow and Downton bone beds, Welsh Basin, UK

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