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    Wyświetlanie 1-5 z 5
    Tytuł:
    The Aptian Gura Râului conglomerates (Southern Carpathians) : remains of an extended subaqueous gravity flow deposit from the eastern flank of the Getic Nappe
    Autorzy:
    Ungureanu, Răzvan
    Săsăran, Emanoil
    Bucur, Ioan I.
    Mircescu, Cristian Victor
    Ungureanu, Alexandra
    Ungur, Ciprian Gheorghiţă
    Powiązania:
    https://bibliotekanauki.pl/articles/2058596.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    conglomerates
    gravity flow deposits
    fan-deltas
    Lower Cretaceous
    Piatra Craiului Massif
    Romania
    Opis:
    The Getic Nappe belongs to the Central Dacides or Dacia Mega Unit. Gravity flow deposits were generated by the Lower Cretaceous overthrust and uplift of this unit over the External Dacides. In the Piatra Craiului Syncline (part of the Getic Nappe), such detrital deposits are represented by the Aptian conglomerates and the uppermost Albian-Cenomanian conglomerates. Part of the infill of the syncline consists of a thick pile of NW-SE oriented conglomerates. Sedimentological study documents the presence of an association which consists of three distinct facies types, represented by: massive conglomerates; alternating conglomerates, sandstones and microconglomerates; and fining- and coarsening-upwards conglomerates. These deposits were accumulated through a series of debris flows, and hyperconcentrated or concentrated flows. The entire assemblage represents a complex routing system within submarine channels, an interpretation made by interpreting facies associations, palaeoflow directions and clast fabrics. A large part of this succession was removed by post-Albian erosion. Thus, the interpretation of the depositional system could be as a series of feeder channels or the submarine sector of a fan-delta system representing a foreland basin fill.
    Źródło:
    Geological Quarterly; 2019, 63, 1; 88--105
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depositional environments, facies and diagenesis of the Upper Jurassic–Lower Cretaceous carbonate deposits of the Buila-Vânturariþa Massif, Southern Carpathians (Romania)
    Autorzy:
    Pleş, G.
    Bucur, I. I.
    Săsăran, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/191844.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Carbonate platforms
    reefs
    microfacies
    micro-encrusters
    carbonate diagenesis
    Upper Jurassic
    lowermost Cretaceous
    Southern Carpathians
    Romania
    Opis:
    The Buila-Vânturariţa Massif consists of massive Upper Jurassic reef limestones (Kimmeridgian–Tithonian) and Lower Cretaceous (Berriasian–Valanginian, and Barremian–?Lower Aptian) deposits. Besides corals and stromatoporoids, a wide range of micro-encrusters and microbialites has contributed to their development. In this study, the authors describe briefly and interpret the main facies associations and present the microfossil assemblages that are important for age determination. The distribution of facies associations, corroborated with the micropalaeontological content and early diagenetic features, indicate different depositional environments. The carbonate successions show the evolution of the Late Jurassic–Early Cretaceous depositional environments from slope and reef-front to internal-platform sedimentary settings, including peritidal environments in the lowermost Cretaceous. Early diagenesis, represented by synsedimentary cementation in the form of micritization (including cement crusts in the reef microframework), followed by dissolution, cementation and dolomitization in a meteoric regime, and void-filling late cementation during the burial stage.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2016, 86, 2; 165-183
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola mikrobialitów, mikroinkrusterów oraz synsedymentacyjnych cementów w tworzeniu raf z wapieni typu sztramberskiego z Polski i Rumunii
    Autorzy:
    Hoffmann, M.
    Kołodziej, B.
    Bucur, I. I.
    Sasaran, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/183375.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    wapienie typu sztramberskiego
    Polska
    Rumunia
    Polska
    Romania
    Stramberk Limestone
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2008, 34, 3/1; 178-179
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dasycladalean green algae and associated foraminifers in Middle Triassic (Lower and Middle Muschelkalk) carbonates of the south-eastern Germanic Basin (Upper Silesia, Poland)
    Autorzy:
    Bucur, Ioan I.
    Matysik, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1836256.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Dasycladales
    green algae
    benthic foraminifera
    Middle Triassic
    Muschelkalk
    Polska
    Opis:
    Middle Triassic dasycladalean algae occur in limestones and dolstones of the Diplopora Beds in Upper Silesia, a region representing the southern part of the Germanic Basin. The dasycladales assemblage of this area was studied by Kotański at the end of the last century, mostly from dolomitized and weathered material. The relatively well-preserved specimens the authors found in thin sections from undolomitized strata allowed the description and revised taxonomical assignment of the algae. The identified microflora includes: Diplopora annulatissima Pia, 1920, Diplopora annulata (Schafhäutl, 1853), Salpingoporella cf. krupkaensis Kotański, 2013, Physoporella prisca Pia, 1912, Physoporella cf. pauciforata (Gümbel, 1872), Holosporella? sp. 1, and Holosporella? sp. 2. Diplopora annulatissima and Favoporella annulata Sokač, 1986 are regarded here as two different species. Oligoporella elegans Assmann ex Pia, 1931, extensively illustrated and described by Kotański (2013), is considered a junior synonym of Oligoporella prisca Pia, 1912, and transferred to the genus Physoporella emended by Grgasovic, 1995. Also, some of the dasycladalean algae (Salpingoporella cf. krupkaensis, Holosporella? sp. 1, and Holosporella? sp. 2) described here could represent new species, but more well-preserved material is necessary. The algae are accompanied by foraminiferal microfauna, which collectively indicate a late Anisian (Illyrian) age of the strata studied.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 4; 391-407
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The eigenvalue problem with conductivity boundary conditions
    Autorzy:
    Bucur, D.
    Durus, I.
    Oudet, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/970293.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    eigenvalues
    isoperimetric
    constant boundary conditions
    Opis:
    In this paper we study isoperimetric inequalities for the eigenvalues of the Laplace operator with constant and locally constant boundary conditions. Existence and stability results are presented in the of the gamma and weak gamma convergencies, together with identification of optimal sets by analytical and numerical methods.
    Źródło:
    Control and Cybernetics; 2008, 37, 4; 811-829
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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