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Geology; March 2002; v. 30; no. 3; p. 235-238; DOI: 10.1130/0091-7613(2002)030<0235:APFTMA>2.0.CO;2
© 2002 Geological Society of America
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African provenance for the metasediments and metaigneous rocks of the Cyclades, Aegean Sea, Greece

Sue Keay*,1 and Gordon Lister*,2

1 Department of Earth Sciences, University of Queensland, St. Lucia, QLD 4072, Australia
2 Australian Crustal Research Centre, Monash University, Clayton, VIC 3128, Australia

U-Pb geochronology on detrital and inherited zircons from metasediments as well as gneissic and metaigneous basement rocks of the Cyclades, Aegean Sea, Greece, defines several periods of crustal growth prior to the Carboniferous. These ages are consistent with Cycladic rocks being derived from the northern margin of Gondwana. There is a distinct Mesoproterozoic age gap evident in zircons from the 25 samples considered. This is characteristic of the West African craton, and we suggest it will also prove characteristic of the Aegean region. This Mesoproterozoic age gap may be used as a tool in terrane reconstruction to distinguish crustal material derived from different parts of Gondwana.

Key Words: zircon • geochronology • provenance • Cyclades • tectonic models




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