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Contribution to the elucidation of pre-Alpine evolution in Bulgaria (based on sedimentological data from the marine Paleozoic)

YANEV, S.N

Geologica Balcanica, 1992-04, Vol.22 (2), p.3-31 [Periódico revisado por pares]

Sofiâ: Blgarska akademiâ na naukite

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  • Título:
    Contribution to the elucidation of pre-Alpine evolution in Bulgaria (based on sedimentological data from the marine Paleozoic)
  • Autor: YANEV, S.N
  • Assuntos: Areal geology ; Areal geology. Maps ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology
  • É parte de: Geologica Balcanica, 1992-04, Vol.22 (2), p.3-31
  • Descrição: Marine sediments of the slightly metamorphosed Paleozoic (Cambrian – Lower Ordovician?), Ordovician, Silurian, Devonian, Carboniferous and Permian have been characterized on the basis of main sections and of quantitative rock content investigations. The subduction and formation of the volcanic island arc had taken place before the Arenigian when the regarded lands were situated far to the south of the Balkan Peninsula. The foundation of the Bulgarian territories has a collage structure. Since the Arenigian an outlying sea had been formed as a vast basin with hemipelagic to pelate sedimentation and stages and zones of shallows and displayed marine streams, Humocky type stratification and even ceased sedimentation before the Silurian. During the Givetian the marginal basin had been transformed, the southern part being turned into an active continental edge, while the northern one kept the character of a passive part of the marginal basin. In the active area of the basin a system of a frontal arc, interarc basin, back arc and backarc basin was formed in the SW-NE direction. During the Sudetian events the most important stage of crust continentalization took place, accompanied by incorporation of granitoids and Alpine type Variscan orogeny (over the former arc) and Jurassic type folded lower region (over the former back sea). At the concluding stage of the Variscan development (Carboniferous – Permian) a collison occurred between the island arc and the young mobile platform, joined in collage manner to the Russian plate.
  • Editor: Sofiâ: Blgarska akademiâ na naukite
  • Idioma: Inglês
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