Abstract
The Cadomian Orogen in the NE Bohemian and northern Armorican massifs shows a distinct NW–SE orogenic zoning, consisting of: (1) an outboard-sitting continental crust unit comprising Neoproterozoic rocks associated with ~2.0-Gyr-old Icartian basement; (2) a magmatic arc and a back-arc basin; (3) a foreland or retroarc basin, respectively; and (4) the passive margin of the back-arc basin. New U–Pb zircon ages of detrital zircons of Neoproterozoic to Fortunian siliciclastics from the Schwarzburg Antiform in the Saxo-Thuringian Zone (NE Bohemian Massif) identify the West African Craton as the hinterland for the Cadomian Orogen. U–Pb ages and Hf isotope data constrain the timing of orogenic events and episodes of crustal growth of both the Cadomian Orogen and the cratonic hinterland.
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References
Gerdes, A., & Zeh, A. (2006). Combined U-Pb and Hf isotope LA–(MC–) ICP–MS analysis of detrital zircons: Comparison with SHRIMP and new constraints for the provenance and age of an Armorican metasediment in Central Germany. Earth and Planetary Science Letters,249, 47–61.
Linnemann, U., Drost, K., Gerdes, A., Jeffries, T., & Romer, R. L. (2008). The Bohemian Massif (Chapter 3: “The Cadomian Orogeny”). In T. McCann (Ed.), The geology of Central Europe (pp. 121–147). London: The Geological Society of London.
Linnemann, U., Gerdes, A., Hofmann, M., & Marko, L. (2013, accepted). The Cadomian Orogen: Neoproterozoic to early Cambrian crustal growth and orogenic zoning along the northwestern periphery of the West African Craton—Constraints from U–Pb ages and Hf isotopes of detrital and magmatic zircon of the Schwarzburg Antiform (Saxo-Thuringian Zone, NE Bohemian Massif, Germany). Precambrian Research. http://dx.doi.org/10.1016/j.precamres.2013.08.007.
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Linnemann, U., Gerdes, A., Hofmann, M., Marko, L. (2014). The Cadomian Orogen: Neoproterozoic to Early Cambrian Crustal Growth and Orogenic Zoning Along the Northwestern Periphery of the West African Craton. In: Rocha, R., Pais, J., Kullberg, J., Finney, S. (eds) STRATI 2013. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-319-04364-7_137
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DOI: https://doi.org/10.1007/978-3-319-04364-7_137
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