Journal
GFF
Volume 136, Issue 1, Pages 262-265Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/11035897.2013.879735
Keywords
Gorstian; Silurian; Suchomasty Volcanic Centre; Prague Basin; palaeolatitude; basalt geochemistry
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Funding
- GACR [210-10-2351]
- IGCP [591]
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A multidisciplinary palaeomagnetic, whole-rock geochemical and volcanological study was carried out in Gorstian deposits of the Suchomasty Volcanic Centre in the western segment of the Prague Basin (Tepla-Barrandian Unit, Bohemian Massif). Phreato-Strombolian eruptions of alkali basalts, transitional between enriched mid-ocean rift basalt and ocean-island basalt, associated with effusions of lava flows within the lower-middle Scanicus chimaera graptolite Biozone at the Vinaice locality, yield a mean palaeomagnetic direction that allows for computation of a palaeolatitude of 24.4 degrees S. Present data support that the Prague Basin was a continental rift basin, situated on presumed Perunica microplate. The Perunica microplate drifted at southern subtropical palaeolatitudes of 24.4 degrees in Gorstian time and experienced either 170 degrees counter-clockwise or 190 degrees clockwise rotation during the Variscan Orogeny.
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