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Wyszukujesz frazę "marble" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Marble from Neolithic quarries at the Bílý Kámen Hill near Sázava (Central Bohemia, Czech Republic) and its petrographic-geochemical characterization
Autorzy:
Přichystal, Antonín
Burgert, Pavel
Gadas, Petr
Powiązania:
https://bibliotekanauki.pl/articles/2058626.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
prehistoric mining
marble
Neolithic
Bílý Kámen
Bohemia
petroarchaeology
Opis:
The longest known prehistoric quarries for non-siliceous (non-flint) rocks in continental Europe were discovered on the Bílý Kámen Hill in central Bohemia (Czech Republic) already in the period between the World Wars. Due to post-war events, this has been all but forgotten, and awareness of this important locality still exists only in the local research community. Its research potential has not yet been exhausted. The article presents the first exact mineralogical and geochemical characteristics of the raw material extracted in these prehistoric quarries. The raw material is fundamentally different from some of the marble artefacts from nearby workshops. The aim of this research is to create a solid foundation for the future detailed study of prehistoric artefacts made from marble and to review the deep-rooted idea of their distribution within the oldest agricultural communities in Central Europe.
Źródło:
Geological Quarterly; 2019, 63, 4; 811--821
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic red nodular limestone from NE Slovakia used as the Ľubovňa “marble” during the Renaissance in Slovakia and Poland
Autorzy:
Pivko, D.
Powiązania:
https://bibliotekanauki.pl/articles/2060362.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ľubovňa “marble”
nodular limestone
Stará Ľubovňa
tombstone
Slovakia
Polska
Opis:
The Ľubovňa “marble” is red nodular limestone of Oxfordian to Tithonian age, which used to be extracted in several quarries near the town of Stará Ľubovňa in NE Slovakia. It replaced the Hungarian Gerecse “marble” which was extensively used in the Kingdom of Hungary and surrounding countries from the end of the 12th to the first third of the 16th century when its use was interrupted by the Turkish occupation of the area. The Ľubovňa “marble” was used as a substitution especially for Renaissance tombstones in today’s Slovakia and Poland and it was found also in Hungary. It reached the top of its popularity between the mid-16th and mid-17th century. To a smaller extent it was still used in the surrounding territories during the other styles in the 18th and 19th centuries. The “marble” production was probably affected by the political situation and wars. It is possible to distinguish the Ľubovňa “marble” from the Gerecse “marble” and the Adnet “marble” from Austria macroscopically on the basis of its distinct cleavage, and microscopically on the basis of microfacies with Saccocoma, Globuligerina and calcareous dinoflagellates. According to the stable isotopes of 18O and 13C, it is approximately similar to the Adnet “marble”.
Źródło:
Geological Quarterly; 2017, 61, 1; 53--61
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Indications of HP events in the volcanosedimentary succession of the Orlica–Śnieżnik Dome, NE Bohemian Massif: data from a marble-amphibolite interface
Autorzy:
Twyrdy, M.
Żelaźniewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060385.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
high-pressure episode
P-T path
marble-amphibolite association
Sudetes
Opis:
A volcanosedimentary succession of the Młynowiec-Stronie Group (MSG) in the Orlica–Śnieżnik Dome (OSD), the Sudetes, NE Bohemian Massif underwent multiple folding and shearing during the Variscan Orogeny. In the sheared domains, there are less deformed pods in which rocks preserve better records of metamorphic events prior to the regional temperature peak. In one such pod, near Gniewoszów on the western limb of the dome, marbles enclosed by massive amphibolites occur. In these rocks, zoned plagioclase with actinolite and epidote inclusions and zoned amphibole grains allowed recognition of three mineral assemblages and three P-T stages at: (1) 310°C/3–4 kbar, (2) 480–500°C/10.5 kbar, (3) 500–530°C/6–6.5 kbar, based on isopleth intersections and checked against conventional thermobarometry. These define a steep clockwise P-T path and a geothermal gradient of 17°C/km before peak conditions were attained, which suggests subduction of the metavolcano-sedimentary rocks (Stronie Formation of the MSG) on the western limb of the OSD, with a transient yet discrete higher pressure episode. Mineral relicts capable of demonstrating a higher pressure event are scarce in the supracrustal rocks of the dome, mainly because they became more thoroughly equilibrated and obliterated during the temperature peak at mid-amphibolite facies conditions and the subsequent ubiquitous greenschist facies overprint.
Źródło:
Geological Quarterly; 2017, 61, 2; 435--449
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ruin marble : a record of fracture-controlled fluid flow and precipitation
Autorzy:
Marko, F.
Pivko, D.
Hurai, V.
Powiązania:
https://bibliotekanauki.pl/articles/2058871.pdf
Data publikacji:
2003
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Carpathians
fluids
healed joints
Liesegang rings
ruin marble
banded structures
Opis:
The ruin marble structure of the Cretaceous/Paleogene fine-grained marly limestone from the Outer Flysch Belt of the Western Carpathians has a non-tectonic origin, according to structural and sedimentological evidence. Distinctive offsets of coloured red-brownish ferric oxyhydroxide bands are not due to displacements along rock-cutting fractures, as they superficially appear to be. Evidences for shear movement along these pseudo-faults were not observed. Band offsets result from different velocities of pervasively diffusing fluids, precipitating ferric oxyhydroxides in corridors bounded by sets of mineralised systematic joints. During rock weathering, calcite-filled joints operated as barriers for lateral fluid diffusion, but enabled longitudinal diffusion along healed joints. Simple laboratory experiments have been performed to simulate the formation of natural ruin marble structure.
Źródło:
Geological Quarterly; 2003, 47, 3; 241-252
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrograficzne uwarunkowania zmienności mechanicznych właściwości niejednorodnego strukturalnie marmuru kalcytowego
Petrographic constraints on the mechanical properties of a structurally heterogenous calcite marble
Autorzy:
Rembiś, Marek
Kośla, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2074301.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
marmur Fior di Pesco Carnico
analiza petrograficzna AGA
Adjacent Grain Analysis
ugięcie
marble Fior di Pesco Carnico
bowing
Opis:
Due to its exceptional ornamental properties, the marble Fior di Pesco Carnico (FDP marble) is a common decorative stone applied to external and internal building elevations. The rock is characterized by a considerable structural and textural variability; however, this feature pertains only to a minor degree to its directional arrangement of anisotropy planes (i.e. lamination) being usually dependent on the non-uniform, spatial distribution of rock mineral components or some textural elements, mainly veins. As a result, the utilitarian properties of the FDP marble varies dependingon therockzone. Petrographic AGA(Adjacent Grain Analysis) investigations were carried out on samples representing various fragments of a marble slab and essential mechanical parameters of the rock were determined. It has been established thatthe FDP marble is deformable asaresultof temperature changes (bowing) and that this feature can be explained to asignificant degree by the type ofcontacts between calcite blasts (AGA = 6). Other highly variable marble properties include the flexural strength under the concentrated load and the breaking load at dowel hole in different places of a marble plate. It has also been shown that applying to computational project works lower values of the expected mechanical rock parameters instead of their mean values has a ensible justification, as to a large extent it secures a higher exploitation safety of the marble to be used within a building object.
Źródło:
Przegląd Geologiczny; 2022, 70, 2; 116--125
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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