A nature of bimodal magmatism associated with Cambro-Ordovician rifting in Gondwana: the NE Bohemian Massif perspective in view of the integrated field data and multiisotopic studies on whole rocks and minerals, specifically zircons
Bimodal magmatism related to Early Palaeozoic thermal event in the northern part of Gondwana has been widely documented in rock successions extending from Spain to Poland. Geochemical studies of acid and mafic rocks, albeit their close occurrence, commonly lead to different conclusions. This bimodal magmatism is either correlated with an intracontinental rifting, oceanic rifting or collisional events in Early Palaeozoic times. This project offers a new, integrated approach for understanding the deep-seated processes related to the Cambrian/Ordovician rifting in the Northern Gondwana from the perspective of the Sudetes (Poland and Czech Republic). Bimodal associations in the Sudetes are the objects of the multimethodological study (whole rock and Sm-Nd geochemistry, U-Pb dating and Hf and O isotopes in zircons, immobile trace element distribution in zircon). PhD student in the project: Marek Śliwiński (MSc).
Bimodal - felsic (light) and mafic (dark) metavolcanics association of the Staré Město Belt, the Sudetes.
Articles:
Śliwiński, M., Jastrzębski, M., Sláma, J. in press. Detrital zircon analysis of metasedimentary rocks of the Staré Město Belt, the Sudetes: implications for the provenance and evolution of the eastern margin of the Saxothuringian terrane, NE Bohemian Massif. Geological Quarterly
Abstracts:
Jastrzębski M., Machowiak. K., Śliwiński, M. Sláma J., 2022. New age constraints for Early Palaeozoic volcanism and sedimentation of the Kaczawa Complex, the Sudetes (SW Poland), Abstract EGU22-8478
Śliwiński, M., Jastrzębski, M., Machowiak K., Sláma J. 2022. Age and geotectonic setting of metavolcanic rocks in the eastern Saxothuringian margin: whole rock geochemistry, zircon trace element geochemistry and U-Pb geochronology of the Staré Město Belt (Czech Republic, Poland). Abstract EGU22-8363
Jastrzębski, M., Żelaźniewicz, A., Sláma J., Krzemińska, E. 2021. Zircon geochronology of the Sudetic portion of Teplá-Barrandia: protolith ages, provenance and significance as source rocks for Devonian and Carboniferous sedimentary basins. 18th Meeting of the Central European Tectonic Studies Group, Book of Abstracts. 53-54
Śliwiński, M., Jastrzębski, M., Machowiak, K., Sláma, J., 2021. Whole rock geochemistry and zircon geochronology of meta-volcanic rocks from the Staré Město Belt, the Sudetes, 18th Meeting of the Central European Tectonic Studies Group, Book of Abstracts. 126.
Śliwiński, M., Jastrzębski, M., 2021. Pressure-Temperature evolution of amphibolites in the Staré Město Belt in the Sudetes. Book of Abstracts, 3rd European Mineralogical Conference EMC 2020, 360
Jastrzębski, J., Sláma, J., Krzemińska, E., 2021. Diversity of Late Cambrian felsic magmas in the SW Poland: an insight from U-Pb and O zircon study. Book of Abstracts, 3rd European Mineralogical Conference EMC 2020, 193.
