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Multiple Archaean to Early Palaeozoic events of the northern Gondwana margin witnessed by detrital zircons from the Radzimowice Slates, Kaczawa Complex (Central European Variscides)

Published online by Cambridge University Press:  15 October 2007

RAFAŁ TYSZKA ,
RYSZARD KRYZA ,
JAN A. ZALASIEWICZ  and
ALEXANDER N. LARIONOV
RAFAŁ TYSZKA
Affiliation:
University of Wrocław, Institute of Geological Sciences, Department of Mineralogy and Petrology, ul. Cybulskiego 30, 50-205 Wrocław, Poland
RYSZARD KRYZA*
Affiliation:
University of Wrocław, Institute of Geological Sciences, Department of Mineralogy and Petrology, ul. Cybulskiego 30, 50-205 Wrocław, Poland
JAN A. ZALASIEWICZ
Affiliation:
University of Leicester, Department of Geology, University Road, Leicester LE1 7RH, UK
ALEXANDER N. LARIONOV
Affiliation:
Centre of Isotopic Research, A.P. Karpinsky All Russian Geological Research Institute (VSEGEI), 74 Sredny Pr, St Petersburg, 199 106, Russia
*
§Author for correspondence: [email protected]
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Abstract

SIMS dating of detrital zircons from the stratigraphically enigmatic Radzimowice Slates of the Kaczawa Mountains (Sudetes, SW Poland), near the eastern termination of the European Variscides, has yielded age populations of: (1) 493–512 Ma, corresponding to late Cambrian to early Ordovician magmatism and constraining a maximum depositional age; (2) between 550 and 650 Ma, reflecting input from diverse Cadomian sources; and (3) older inherited components ranging to c. 3.3 Ga, with age spectra similar to those from Gondwanan North Africa. The new data show that the Radzimowice Slates cannot form a Proterozoic base to the Kaczawa Mountains succession, as suggested by earlier models, but was deposited, at the earliest, as an extensional basin-fill, during a relatively late stage of the break-up of this part of northern Gondwana.

Keywords

SIMS zircon datingslatesKaczawa ComplexSudetesVariscidesGondwana
Type
Original Article
Information
Geological Magazine , Volume 145 , Issue 1 , January 2008 , pp. 85 - 93
Copyright
Copyright © Cambridge University Press 2007

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