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dc.contributor.authorLinnemann, U
dc.contributor.authorMcNaughton, Neal
dc.contributor.authorRomer, R
dc.contributor.authorGehmlich, M
dc.contributor.authorDrost, K
dc.contributor.authorTonk, C
dc.identifier.citationLinnemann, U and McNaughton, Neal and Romer, R and Gehmlich, M and Drost, K and Tonk, C. 2004. West African provenance for Saxo-Thuringia (Bohemian Massif): Did Armorica ever leave pre-Pangean Gondwana? - U/Pb-SHRIMP zircon evidence and the Nd-isotopic record. International Journal of Earth Sciences. 93 (5): pp. 683-705.

Neoproterozoic rocks in the Saxo-Thuringian part of Armorica formed in an active margin setting and were overprinted during Cadomian orogenic processes at the northern margin of Gondwana. The Early Palaeozoic overstep sequence in Saxo-Thuringia was deposited in a Cambro-Ordovician rift setting that reflects the separation of Avalonia and other terranes from the Gondwana mainland. Upper Ordovician and Silurian to Early Carboniferous shelf sediments of Saxo-Thuringia were deposited at the southern passive margin of the Rheic Ocean. SHRIMP U/Pb geochronology on detrital and inherited zircon grains from pre-Variscan basement rocks of the northern part of the Bohemian Massif (Saxo-Thuringia, Germany) demonstrates a distinct West African provenance for sediments and magmatic rocks in this part of peri-Gondwana. Nd-isotope data of Late Neoproterozoic to Early Carboniferous sedimentary rocks show no change in sediment provenance from the Neoproterozoic to the Lower Carboniferous, which implies that Saxo-Thuringia did not leave its West African source before the Variscan Orogeny leading to the Lower Carboniferous configuration of Pangea. Hence, large parts of the pre-Variscan basement of Western and Central Europe often referred to as Armorica or Armorican Terrane Assemblage may have remained with Africa in pre-Pangean time, which makes Armorica a remnant of a Greater Africa in Gondwanan Europe. The separation of Armorica from the Gondwana mainland and a long drift during the Palaeozoic is not supported by the presented data.

dc.publisherSpringer Verlag
dc.subjectNeodymium isotopes
dc.subjectRheic Ocean
dc.titleWest African provenance for Saxo-Thuringia (Bohemian Massif): Did Armorica ever leave pre-Pangean Gondwana? - U/Pb-SHRIMP zircon evidence and the Nd-isotopic record.
dc.typeJournal Article
dcterms.source.titleInternational Journal of Earth Sciences

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curtin.departmentJohn de Laeter Centre for Mass Spectrometry (COE)
curtin.accessStatusFulltext not available
curtin.facultyJohn De Laeter Centre For Mass Spectrometry (JdL
curtin.facultyFaculty of Science and Engineering

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