10.6084/m9.figshare.3453506.v1
Jan Košler
Jan
Košler
Jiří Konopásek
Jiří
Konopásek
Jiří Sláma
Jiří
Sláma
Stanislav Vrána
Stanislav
Vrána
U–Pb zircon provenance of Moldanubian metasediments in the Bohemian Massif
Geological Society of London
2016
detrital zircon component
detrital zircon age spectra
future tectonic models
laser ablation inductively
Bohemian Massif
metasediment
Palaeoproterozoic age maxima
plasma mass spectrometry show variations
Moldanubian
Geology
2016-06-21 11:28:36
Dataset
https://geolsoc.figshare.com/articles/dataset/U_Pb_zircon_provenance_of_Moldanubian_metasediments_in_the_Bohemian_Massif/3453506
<p>Detrital zircon U–Pb age data from the Moldanubian part of the Bohemian Massif obtained by laser ablation inductively coupled
plasma mass spectrometry show variations between the lithotectonic units and point to their formation in spatially close but
separated basins that were supplied by detritus from somewhat different source areas, possibly over different periods of time.
The youngest detrital zircon component in metasediments of the Monotonous and Varied Units is Early Ordovician and Mid- to
Late Devonian in age, respectively, suggesting their deposition in Palaeozoic times. Reliable interpretation of the Mid- to
Late Devonian zircons recovered from metasediments of the Gföhl Unit is precluded by their high metamorphic grade and presence
of anatectic melt. The Early Carboniferous zircons from the Gföhl Unit are interpreted as being of metamorphic origin. Comparison
of detrital zircon age spectra from the Moldanubian, Teplá–Barrandian and Moravo-Silesian metasediments suggests that these
were deposited in separate basins but the overall similarity of the Neoproterozoic and Palaeoproterozoic age maxima and sparse
Neo- and Mesoarchaean ages suggest that the three crustal segments must have been spatially related prior to the Variscan
orogeny. Future tectonic models of the Variscan assembly of the Bohemian Massif must account for nearly synchronous evolution
of the Moldanubian, Teplá–Barrandian and Moravo-Silesian Palaeozoic sedimentary basins that shared a common crust and most
of their sedimentary sources, as well as for a rapid burial of the Moldanubian sediments to mid- and lower crustal levels
that was followed by their rapid exhumation to the upper crust in Mid-Devonian to Early Carboniferous times.
</p>