Detrital zircon U-Pb ages of Late Silurian and Early Devonian sedimentary sequences from Northwestern, Svalbard, implications for regional correlations in the Arctic Caledonides
2008 (English)Conference paper (Other academic)
In the North Atlantic region, Caledonian and Grenvillian terrains are exposed on Svalbard, Greenland, Great Britain, Canada and Scandinavia. Reconstructing the original configuration of these terrains depends partly on determining the age and provenance of the sedimentary rocks overlying the basement. Provenance investigations using detrital zircon U-Pb ages are a powerful tool to explore the palaeogeography and can yield important information how the North Atlantic region evolved through the Grenvillian and Caledonian orogenies.
U-Pb laser ablation ICP-MS provenance study of zircons from Late Silurian and Early Devonian coarse siliciclastics of NW Svalbard indicate an east Greenland provenance. The decrease in 410-440 Ma ages and 2600-2800 Ma ages, combined with a large increase in 950-1000 Ma ages up-section suggests that sediment detritus was initially derived from exhumation of the Caledonian Orogen and subsequently from the Grenvillain Orogen.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:su:diva-15756OAI: oai:DiVA.org:su-15756DiVA: diva2:182276