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Wyświetlanie 1-4 z 4
Tytuł:
Tectonic evolution of the Sicilian Thrust System (central Mediterranean)
Autorzy:
Napoli, G.
Nigro, F.
Renda, P.
Ślqczka, A.
Favara, R.
Powiązania:
https://bibliotekanauki.pl/articles/2060501.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Sicily
Africa margin deposits
thrusting
extension
tectonics
accretionary prism
Opis:
The Sicilian Thrust System (STS) is a south-verging (Africa-verging) fold-and-thrust belt including a Mesozoic-Paleogene sedimentary sequence. This thrust stack owes its origin to the deformation of pre-orogenic strata deposited in different palaeogeographic domains belonging to passive margins of the African plate. The STS was deformed during the Neogene, following the closure of the Tethys Ocean and the continental collision between the Sardo-Corso Block and the north Africa margins. The thrust pile was detached from the underlying basement during the Miocene-Pleistocene. The regional-scale structural setting recognized allows us to reconstruct the tectonic evolution of the STS as follows: I - piggy-back thrusting from the Late Oligocene to the Langhian, inducing the building of the Inner Sicilian Chain (ISC); II - piggy-back thrusting from the Langhian to the Tortonian, inducing the formation of the Middle Sicilian Chain (MSC); III - generalized extensional deformation in the chain-foredeep-foreland system from the Tortonian to the Early Pliocene; IV-a new onset of piggy-back thrusting after the Early Pliocene allowed the building of the Outer Sicilian Chain and out-of-sequence thrusting in the previously developed ISC and MSC.
Źródło:
Geological Quarterly; 2012, 56, 4; 579--600
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geodynamic evolution of the o rogen: the West Carpathian and Ouachitas case study
Autorzy:
Golonka, J.
Ślączka, A.
Picha, F.
Powiązania:
https://bibliotekanauki.pl/articles/191485.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
plate tectonics
paleogeography
orogen
accretionary prism
Wilson cycle
Ouachita
Carpathians
Opis:
Twelve time interval maps have been presented which depict the plate tectonic configuration, paleogeography and lithofacies for the circum-arpathian area from the Late Carboniferous through Neogene and for the circum-Ouachita region from Late Cambrian through Early Permian. The following geodynamic evolutionary stages can be distinguished in these two orogens: Stage I - rifting of terranes off the major continent, forming oceanic basins (Triassic-Early Cretaceous in the Carpathian region, Cambrian-Devonian in the Ouachita region); Stage II - formation of subduction zones along the active margin, partial closing of oceanic basin, development of deep-water flysch basin associate with this rifting on the platform (passive margin) with the attenuated continental crust (Late Cretaceous-Paleocene in the Carpathian region, Early Carboniferous in the Ouachitas); Stage III - collision, perhaps terrane-continent, with the accompanying conver- gence of two large continents, development of accretionary prisms, Eocene-Early Miocene time in the Carpathian region, Late Carboniferous in the Ouachitas; and Stage IV - postcollisional, (Miocene-Present-future? in the Carpathians, Permian-Triassic in the Ouachitas). Both, Carpathians and Ouachitas are accretionary prisms formed in response to terrane-continent and continent-continent collision. The paleogeographic approach we have taken shows how these mountain belts were constructed through the orogenic cycle, which reflects complex plate tectonic processes. Carpathians and Ouachitas record complete and homologous Wilson cycle.
Źródło:
Annales Societatis Geologorum Poloniae; 2003, 73, No 3; 145-167
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oliwiny ze skał ultramaficznych masywu Jordanów-Gogołów (ofiolit sudecki)-zapis zróżnicowanych procesów geologicznych
Olivines from ultramafic rocks of Jordanów-Gogołów Serpentinite Massif (Sudetic ophiolite) - a complex interplay of petrogenetic processes
Autorzy:
Dubińska, E.
Nejbert, K.
Bylina, P.
Powiązania:
https://bibliotekanauki.pl/articles/2074784.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ofiolit sudecki
pochodzenie oliviny
Metamorfizm UHP
pryzma akrecyjna
Sudetic ophiolite
origin of olivines
UHP metamorphism
accretionary prism
Opis:
Olivines occurring in the Jordanów-Gogołów Serpentinite Massif (JGSM) in the Polish Sudetes were formed during complex series of geological events and processes: growth in the upper mantle; crystallization of ultramafic cumulates at a mid-ocean ridge; ultra-high pressure (UHP) and high pressure metamorphism in a subduction zone; and contact metamorphism related to intrusion of boninitic and/or granitic magmas into the JGSM. The presence of olivine with pseudocleavage and intergrowths of ferrichromite and of pseudospinifex olivine indicates very fast transport from UHP conditions (from depths ca. 410 km) to the surface, similar to the model proposed by Brueckner & van Roermund (2004). The range of metamorphic conditions (from UHP to zeolite facies) recorded by JGSM olivines and also by associated serpentinites indicates that the JGSM is a fragment of an accretionary prism.
Źródło:
Przegląd Geologiczny; 2010, 58, 6; 506-515
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California
Autorzy:
Kiel, S.
Campbell, K.A.
Elder, W.P.
Little, C.T.S.
Powiązania:
https://bibliotekanauki.pl/articles/20093.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Jurassic
Cretaceous
gastropod
hydrocarbon seep
forearc basin
accretionary prism setting
California
paleontology
Gastropoda
Great Valley Group
Franciscan Complex
deep water
Opis:
Fourteen gastropod species from 16 Mesozoic hydrocarbon seep carbonate deposits of the Great Valley Group and Franciscan Complex in California are described. Two genera are new: Bathypurpurinopsis has a fusiform shell with a siphonal fold, and variable Paskentana has turbiniform or littoriniform shells with spiral and/or scaly sculpture and convex or shouldered whorls. Due to the lack of data on shell microstructure and protoconch morphology, many of our taxonomic assignments have to remain tentative at present. Species that are described as new include: Hokkaidoconcha bilirata, H. morenoensis, H. tehamaensis (Hokkaidoconchidae), Abyssochrysos? giganteum (Abyssochrysidae?), Paskentana globosa, P. berryessaensis, and Bathypurpurinopsis stantoni (Abyssochrysoidea, family uncertain). The total fauna represents a mixed bag of taxa that were: (i) widely distributed during the late Mesozoic (Amberleya); (ii) restricted to late Mesozoic seep carbonates in California (Atresius, Bathypurpurinopsis, Paskentana); and (iii) members of seep/deep−sea groups with a long stratigraphic range (abyssochrysids, hokkaidoconchids).
Źródło:
Acta Palaeontologica Polonica; 2008, 53, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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