A5000413232- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Geological Formations and Processes Exploration
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Heavy metals in environment
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Radioactivity and Radon Measurements
- Hydrocarbon exploration and reservoir analysis
- Laser-induced spectroscopy and plasma
- Cultural Heritage Materials Analysis
- Metallurgy and Cultural Artifacts
- Mercury impact and mitigation studies
- Coal and Its By-products
- Geological Modeling and Analysis
- Methane Hydrates and Related Phenomena
- Ancient and Medieval Archaeology Studies
- Lichen and fungal ecology
- Geological and Geophysical Studies
- Archaeology and ancient environmental studies
- Radioactive contamination and transfer
Czech Geological Survey
2014-2025
University of Bergen
2009-2014
Charles University
1984-2005
A novel chromatographic separation technique for Sr and Nd from geological silicate samples was established successfully tested routine use in Laboratory of Radiogenic Isotopes the Czech Geological Survey.The scheme is based on combination modification methods published papers by Christian Pin his co-workers.This triple column arrangement enables isolation pure fractions (also Sm if required) bulk-rock solution a single step during one working day.The yields are high, while blank levels...
The chemical and phase compositions of particles produced by laser ablation (266 nm Nd:YAG) silicate NIST glasses zircon were studied SIMS HR-TEM techniques. data suggest that the formation phases different mineralogy and/or composition from original sample at site can result in elemental fractionation (non-stoichiometric sampling) material delivered to ICP-MS for quantitative analysis. Evidence element is preserved chemically zoned ejecta deposited around pit. varies with particle size so...
The Žulová Composite Pluton located at the north-eastern margin of Bohemian Massif exposes undeformed coexisting mafic-felsic association typical post-orogenic magmatism.The bulk pluton is made biotite granite and granodiorites along with subordinate quartz monzodiorite.New LA-ICP-MS U-Pb zircon dating revealed a synchronous emplacement (291 ± 5 Ma), granodiorite monzodiorite (292 4 Ma).The whole-rock geochemistry Sr-Nd isotopic data indicate that plausible source for could have been...
Laser ablation multi-collector inductively coupled plasma mass spectrometry (LA MC ICP-MS) and secondary ion (SIMS) were used to determine the boron isotopic compositions of several natural tourmaline group minerals (elbaite, schorl dravite). This study reports on effects instrument parameters LA ICP-MS composition sample matrix data accuracy, reproducibility repeatability. We demonstrate that has a significant effect obtained δ11B values impacts with bias up ca. 2.5‰ if non matrix-matched...
The Lesser Kabylia massif, situated within the internal zone of Alpine Algerian Tell in Maghrebides, contains a metamorphic basement uncertain Paleozoic age. Despite negligible tectono-metamorphic overprint, pre-Alpine history is poorly known. Therefore, to fill gap, we carried petrological and LA-ICP-MS zircon U-Pb dating study various rock types this basement.The divided into two units: (1) lower-crustal unit characterized by high-grade metamorphism (2) an upper-crustal composed low-grade...
Timing of magmatic activity the late-Variscan Altenberg–Teplice Caldera was rather vaguely constrained. In this paper, we present five new laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) U–Pb zircon ages, which along with published data indicate ~13 Myr lifetime. Formation commenced emplacement pre-caldera pluton at ~325–319 Ma, and terminated intrusion syn-collapse ring dykes post-collapse granites ~312 Ma. The main ignimbrite volcanism in area ATC occurred ~318–313...
Mid-Devonian high-pressure (HP) and high-temperature (HT) metamorphism represents an enigmatic early phase in the evolution of Variscan Orogeny. Within Bohemian Massif this is recorded mostly allochthonous complexes with uncertain relationship to major tectonic units. In regard, Mariánské Lázně Complex (MLC) unique its position at base original upper plate (Teplá-Barrandian Zone). The MLC composed diverse, but predominantly mafic, magmatic-metamorphic rocks late Ediacaran mid-Devonian...
Cenozoic plutonic rocks in northeast Saveh, part of the central Urumieh–Dokhtar Magmatic Arc (UDMA) Iran, comprise monzonite, monzodiorite, gabbro, and gabbrodiorite. Geochemical, zircon U-Pb geochronology, Hf isotopic data reveal that these belong to a medium-K calc-alkaline, metaluminous series with arc-related signatures. Zircon ages (ca. 60 3 Ma) indicate prolonged magmatic evolution from Middle Paleocene Pliocene. Contrary earlier reports 15 Ma period reduced activity 72–57 Ma), our...
This work discusses the timing and sources for pre- syn-orogenic sedimentation in southernmost internal domain of Kaoko–Dom Feliciano–Gariep orogen. One sample from Marmora Terrane (Gariep Belt, S Namibia) yielded data suggesting origin, whereas two other samples suggest their pre-orogenic nature. Two volcanic rocks San Carlos Formation (Punta del Este Terrane, Uruguay) U–Pb zircon monazite ages 578 ± 7 562 Ma, respectively, providing sedimentation, detrital confirm origin basin. Tonian...
Soils in polluted regions are generally regarded as a delayed, long-lasting source for Pb contamination of aquatic systems. Lead deposited on topsoil is slowly transported downward with particulate and colloidal organic matter, driven by infiltrating precipitation. Then, tightly retained mineral soil. export from catchments extremely low decoupled the atmospheric input. We tested this hypothesis 11 small catchments, differing pollution levels. Input/ouput fluxes were monitored 14–15 years an...