A5052625852- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Geological Formations and Processes Exploration
- Geological Studies and Exploration
- Paleontology and Stratigraphy of Fossils
- Geological Modeling and Analysis
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Geotechnical and Geomechanical Engineering
- Engineering and Environmental Studies
- Image Processing and 3D Reconstruction
- Graphite, nuclear technology, radiation studies
- Geology and Paleoclimatology Research
- Geomagnetism and Paleomagnetism Studies
- earthquake and tectonic studies
- Geological and Geophysical Studies
- Geochemistry and Geochronology of Asian Mineral Deposits
- Arctic and Russian Policy Studies
- Mineralogy and Gemology Studies
- Tunneling and Rock Mechanics
- Mining and Gasification Technologies
Czech Geological Survey
2016-2025
Charles University
2017-2018
Abstract Potential field data analysis, geology, and geochemistry are used to revise the terrane accretion model of Chinese Altai East Junggar. Major gradients potential demarcate significant crustal structures their continuity in depth. These demonstrate that distribution geophysical anomalies does not match with terranes boundaries defined previously. Instead, heterogeneously developed NE/SW‐trending gravity NW‐SE magnetic both units correlate Devonian Permian tectonometamorphic zones,...
The review of the lithology volcanic sedimentary units, ages ophiolite mélanges, magmatic and detrital zircon age spectra, as well whole-rock Nd Hf isotopic systematics, has led to identification three subduction systems in West Junggar domain one East domain. In Junggar, it is from south north: 1) A north-dipping Carboniferous system consisting Karamay accretionary wedge, Darbut mélanges Toli arc. 2) south-dipping comprising Cambrian Hebukesaier-Hongguleleng mélange, Silurian–Devonian...
Abstract: At the northeastern edge of Moldanubian Zone, a large body felsic to intermediate granulite with relics high-pressure mineral assemblage is exposed within medium-grade paragneisses, micaschists and metagranites. A polyphase tectonic evolution in study area resulted three deformation phases (D 1 –D 3 ). Peak metamorphic conditions (860–1000 °C 16 kbar) granulites are interpreted as reflecting an early stage high-grade orogenic lower crust. These were followed by exhumation crustal...
New field, petrographic, geochemical and geochronological data from the Togtokhinshil Complex (western margin of Lake Zone, Central Asian Orogenic Belt) reveal presence two separate Early Palaeozoic magmatic pulses: Mid-Ordovician Late Devonian.The (c.460 Ma) magmatism produced various types mafic plutonic rocks (gabbro-diorite suite) emplaced into volcanosedimentary sequence Baatar Fm.Gabbros to gabbrodiorites have metaluminous mostly low normal-K calc-alkaline or possibly tholeiitic...
Abstract: The Letovice Complex, composed of metamorphosed enriched mid-ocean ridge basalts with trondhjemitic sheets, as well gabbroic and ultrabasic bodies, is exposed within an important Variscan suture separating the Moldanubian Domain (to west) from Brunovistulicum east) in eastern part Bohemian Massif, Czech Republic. A polyphase tectonic evolution study area was connected underthrusting subsequent exhumation former oceanic realm, which resulted three deformation phases (D 1 –D 3 ). New...
The Kouřim Unit represents one of the largest pre-Variscan meta-igneous complexes in Bohemian Massif and a geochronological, whole-rock geochemical Sr–Nd isotopic study was conducted to better understand magmatic evolution Early Paleozoic Gondwana margin. Five orthogneisses yield U–Pb zircon ages ranging from 492 ± 4 484 2 Ma. Two leucogranites give 500 485 Ma, interpreted be inherited their orthogneiss host rock. samples metasedimentary rock are dominated by Neoproterozoic–Cambrian detrital...
Abstract Sedimentological and geochronological data from late Paleozoic strata located between the East Junggar Chinese Altai regions in NW China were examined, aiming to decipher tectono-sedimentary evolution of this important tectonic boundary. Carboniferous sediments on side show arc-proximal depositional characteristics proximal Heishantou Nanmingshui Formations distal Beitashan Yundukala Formations, while Erqis complex is characterized by continental margin affinity. Lithological...
Abstract The geodynamic evolution of the East Junggar is examined by means satellite imaging and field‐based structural studies, U‐Pb zircon geochronology analysis potential field geophysical data in Yemaquan arc Dulate back‐arc systems. northern shows a pervasive WNW–ESE steep S 1 foliation that related to exhumation Armantai ophiolitic mélange an F antiformal structure. bedding sequences folded N–S‐trending upright folds are preserved low strain domains. timing D estimated between 310 280...
The processes leading to the assembly of Rodinia supercontinent through Grenvillian collisional orogeny are relatively well known. In contrast, accretionary orogenic occurring at periphery following poorly understood. To fill this gap, we have identified metamorphic rocks in Mongolia collage Central Asian Orogenic Belt, where numerous data testify for Meso- Neoproterozoic magmatic reworking. tectono-metamorphic evolution peri-Siberian tract Belt is mainly characterized by late...