skip to main content
Idioma:
Primo Advanced Search
Primo Advanced Search Query Term
Primo Advanced Search prefilters
Busca Simples

U–Pb zircon ages and structural development of metagranitoids of the Teplá crystalline complex: evidence for pervasive Cambrian plutonism within the Bohemian massif (Czech Republic)

Dörr, Wolfgang ; Fiala, Ji q i ; Vejnar, Z. ; Zulauf, Gernold

Geologische Rundschau, 1998-05, Vol.87 (1), p.135-149 [Periódico revisado por pares]

Berlin: Springer Nature B.V

Texto completo disponível

Citações Citado por
  • Título:
    U–Pb zircon ages and structural development of metagranitoids of the Teplá crystalline complex: evidence for pervasive Cambrian plutonism within the Bohemian massif (Czech Republic)
  • Autor: Dörr, Wolfgang ; Fiala, Ji q i ; Vejnar, Z. ; Zulauf, Gernold
  • Assuntos: Geological time ; Metamorphic rocks ; Mineralogy ; Plate tectonics ; Stratigraphy
  • É parte de: Geologische Rundschau, 1998-05, Vol.87 (1), p.135-149
  • Descrição: U-Pb zircon dating of three metagranitoids, situated within a tilted crustal section at the northwestern border of the Teplá Barrandian unit (Teplá crystalline complex, TCC), yields similar Cambrian ages. The U-Pb data of zircons of the Teplá orthogneiss define an upper intercept age of 513 +7/-6Ma. The ^sup 207^Pb/^sup 206^Pb ages of 516±10 and 511±10Ma of nearly concordant zircons of the Hanov orthogneiss and the Lestkov granite are interpreted to be close to the formation age of the granitoid protolith. Similar to the Cambrian granitoids of the southwestern part of the Teplá Barrandian unit (Domazlice crystalline complex, DCC) the Middle Cambrian emplacement of the TCC granitoids postdates Cadomian deformation and metamorphism of the Upper Proterozoic country rocks, but predates Variscan tectonometamorphic imprints. Structural data as well as sedimentological criteria suggest a dextral transtensional setting during the Cambrian plutonism, related to the Early Paleozoic break-up of northern Gondwana. Due to strong Variscan crustal tilting, the degree of Variscan tectonometamorphic overprint is strikingly different in the dated granitoids. It is lowest in the weakly or undeformed Lestkov granite, located in the greenschist-facies domain. The Teplá orthogneiss in the north underwent pervasive top-to-NW mylonitic shearing under amphibolite-facies conditions. There is no indication for a resetting of the U-Pb isotopic system of the Teplá orthogneiss zircons that could be attributed to this imprint. Radiation damages accumulated until recent have probably caused lead loss.[PUBLICATION ABSTRACT]
  • Editor: Berlin: Springer Nature B.V
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  7 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.