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    Wyświetlanie 1-3 z 3
    Tytuł:
    The impact of the mineral composition of Carboniferous claystones on the water-induced changes of their geomechanical properties
    Autorzy:
    Małkowski, P.
    Ostrowski, Ł.
    Bożęcki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/184209.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Carboniferous claystones
    geomechanical properties
    water-induced changes
    mineral composition
    Opis:
    In this article, the authors describe the characteristics and changes of geomechanical properties of Carbonifeorus claystones as related to their mineral composition and the time of soaking in water. Geomechanical properties, including bulk density, Young modulus, Poisson ratio, unconfined compressive strength, durability index, and swelling index were examined in dry rock samples, and in water-soaked samples after 3 hours of soaking, and 6 hours of soaking respectively. Changes in the geomechanical properties of rocks were also examined as a function of their mineralogical composition. In particular, the properties of rocks were examined in relation to present aluminosilicates and layered aluminosilicates, respectively. Changes in the geomechanical properties were also examined relative to the presence of minerals anatase and siderite. Correlation coefficients between physical parameters and mineral composition were examined. It was determined that the total quantity of aluminosilcates is a better predictor of geomechanical properties after soaking, than only the content of layered aluminosilicates. Calculated correlation coefficients were generally higher for most samples after 6 hours of soaking than after 3 hours of soaking. It was also determined that the increase of bulk density correlates much better with the mineral anatase content, than with the siderite content.
    Źródło:
    Geology, Geophysics and Environment; 2017, 43, 1; 43-55
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Foraminiferal stratigraphy of Palaeogene deep-water red facies in the Gorce Mountains (Magura Nappe, Polish Outer Carpathians)
    Autorzy:
    Bąk, K.
    Bąk, M.
    Cieśla, M.
    Paul, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/191980.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    agglutinated Foraminifera
    red claystones and mudstones
    Palaeocene
    Eocene
    Magura Nappe
    Polish Outer Carpathians
    Gorce Mountains
    Opis:
    The deposition of red and variegated mudstones and claystones characterized the ancient Tethys Ocean during Cretaceous and Palaeogene times, including in its north-western part, the Alpine–Carpathian deep-water basins. Palaeogene variegated sediments, containing red mudstone and claystone layers, crop out in the Gorce Mountains (Rosocha creek, near Lubomierz) in the Magura Nappe (Bystrica Subunit) of the Polish Outer Carpathians. These sediments occur as layers 1–10 cm thick and as packages of layers 2–3 m thick that are associated with very thin-bedded turbidites. The entire succession is tectonically disturbed and parts of it belong to the Ropianka, Łabowa Shale and Beloveža Formations. The sediments studied contain 27 genera and 59 species that belong to deep-water agglutinated foraminiferal (DWAF) assemblages. Tubular taxa, which are frequent in various Mesozoic–Cenozoic flysch sediments are relatively rare in the section studied. The assemblages are moderately diverse (3–20 taxa per sample). Excluding tubular forms, the most common taxa belong to Trochamminoides – Paratrochamminoides spp., Saccammina placenta, glomospirids, Recurvoides – Recurvoidella spp. and karrerulinids. The oldest part of the red sediments, referable to the Ropianka Formation, represents the upper part of the Rzehakina fissistomata Zone (probably the Upper Palaeocene). The youngest red sediments, forming thin intercalations in the Beloveža Formation, represent the acme of Reticulophragmium amplectens (middle Lutetian). Owing to tectonic disturbances, most of the Lower Eocene part of the variegated facies of the Łabowa Shale Formation is not preserved in the section studied. The upper part of it, a package 2 m thick, represents the lower part of the Reticulophragmium amplectens Zone. The small thickness (10–15 m) of the Łabowa Shale Formation in the section studied is similar to other sections in the southern part of the Bystrica Subunit. It is probably of a sedimentary nature, reflecting a decreasing number of mud-rich, gravitational flows in the southern part of the Magura Basin during the Early Eocene. Nevertheless, the strong tectonic disturbances that took place in this area during the Oligocene–Miocene folding and overthrusting influenced the reduction in thickness of these sediments.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 3; 201-212
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pierwiastki ziem rzadkich (REE) w iłowcach z wybranych pokładów węgla kamiennego serii mułowcowej i piaskowcowej Górnośląskiego Zagłębia Węglowego
    Rare earth elements (REE) in claystones with selected coal seams of the mudstone and sandstone series of the Upper Silesian Coal Basin
    Autorzy:
    Kokowska-Pawłowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/215870.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    pierwiastki ziem rzadkich
    iłowce
    skała towarzysząca
    pokład węgla
    Górnośląskie Zagłębie Węglowe
    rare earth elements (REE)
    claystones
    accompanying rock
    coal seam
    Upper Silesian Coal Basin
    Opis:
    W artykule przedstawiono wyniki badań zróżnicowania zawartości pierwiastków ziem rzadkich (REE ) w iłowcach towarzyszących wybranym pokładom węgla z warstw załęskich i rudzkich z zachodniej części Górnośląskiego Zagłębia Węglowego (GZW). Analizowano 75 próbek skał ilastych współwystępujących z pokładami węgla 405 i 408 pobranych w GZW. Zawartość wybranych REE oznaczona została za pomocą Instrumental Neutron Activation Analysis (INAA). Z uwagi na ograniczone możliwości oznaczono: skand (Sc), lantan (La), cer (Ce), neodym (Nd), samar (Sm), europ (Eu), terb (Tb), yterb (Yb) oraz lutet (Lu), zaś zawartość itru (Y) badano metodą Fusion-Inductively-Coupled Plasma (FUS-ICP). [...]
    In this paper results of investigation on the variability of REE contents in the clayey rocks accompanying selected coal seams from Zaleskie and Ruda beds of western part of Upper Silesia Coal Basin (USCB) have been presented. 75 samples have been analysed from the claystones coexisting with coal seams 405 and 408 collected from the USCB area. Contents of selected REE have been assessed with a use of the Instrumental Neutron Activation Analysis (INAA). In regard to the constraints of this method following elements underwent evaluation: scandium (Sc), lanthanum (La), cerium (Ce), neodymium (Nd), samarium (Sm), Europium (Eu), terbium (Tb), ytterbium (Yb), and lutetium (Lu). Contents of yttrium (Y) was determined with a use of the Fusion-Inductively-Coupled Plasma (FUSICP) method. [...]
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2016, 32, 3; 39-66
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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