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    Wyświetlanie 1-11 z 11
    Tytuł:
    Wstępne dane o spinelu właściwym (MgAl2O4) z kopalni granodiorytu Łażany II w masywie Strzegom–Sobótka
    Preliminary data on spinel (MgAl2O4) from the Łażany II granodiorite quarry of the Strzegom–Sobótka massif
    Autorzy:
    Łobos, Krzysztof
    Pawlik, Tomasz
    Klukowski, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2075898.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    spinel
    Łażany
    masyw Strzegom–Sobótka
    Strzegom–Sobótka massif
    Opis:
    The study conducted in the granodiorite quarry at Łażany (Strzegom–Sobótka granitoid massif, Sudetes, Poland) identified spinel crystals within a marble interlayer contained in hornfels. Spinel occurs in the form of perfect octahedrons of violet color. The crystals reach a size of up to 2 mm, but typically are much smaller. The hornfels zone with a calcsilicate rock and a marble inlayer is about a dozen meters thick and most probably comes from the metamorphic cover of the Strzegom batholith. Semi-quantitative analyses of spinel were performed. In addition, chondrodite-like or monticellite-like minerals and vesuvianite have been found together with the spinel.
    Źródło:
    Przegląd Geologiczny; 2019, 67, 10; 823--827
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Osuwiska Masywu Ślęży (Przedgórze Sudeckie)
    Landslides on the Ślęża Massif (Sudetic Foreland)
    Autorzy:
    Chaszczewicz, Adam Karol
    Powiązania:
    https://bibliotekanauki.pl/articles/20047196.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ruchy masowe
    osuwiska
    Przedgórze Sudeckie
    masyw Ślęży
    mass movements
    landslides
    Sudetic Foreland
    Ślęża Massif
    Opis:
    Ślęża Massif is an isolated group of hills, surrounded by plains, located on the Sudetic Foreland with the main tops of Ślęża and Radunia. This mesoregion covers an area composed of two structural units: Sudetic Ophiolite and Strzegom-Sobótka Granite Pluton. The present relief of the Ślęża Massif was formed mainly during the Pleistocene glaciations. This article presents the results of landslide observations made in selected locations on the Ślęża Massif. Scientific works were carried out on the south-western, southern and eastern slopes of Ślęża (composed of gabbros), as well as on the northern slopes of Radunia (serpentinites). This area is the place of occurrence of specific morphological forms with research history abundant in various concepts (among others: moraines of the Scandinavian ice sheet, congelifluction tongues, debris flows, fossil rockglaciers and landslides). Author's research, basedon field works and digital terrain model analysis, revealsthat15 inactive landslides exist at these locations. The forms are characterized by various morphometric parameters and different types of colluvial mass movements. Probably, they emerged as a result of late Pleistocene and early Holocene climate changes. Author's conclusions partially confirm some observations and interpretations stated by Horwath in 1981 and by Traczyk and Kasprzak in 2014. Due to plenty of landslide evidence, the views about relict rock glaciers and other conceptions should be defined as incorrect. The forms require further detailed studies.
    Źródło:
    Przegląd Geologiczny; 2022, 70, 9; 713-721
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie sekwencji deformacji fałdowych w północnej i południowej okrywie granitoidów Karkonoszy
    Comparison of fold deformation sequences in the northern and southern metamorphic cover of the Karkonosze granitoids
    Autorzy:
    Gaidzik, K.
    Żaba, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075681.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sekwencja
    odkształcenie
    łupki łyszczykowe
    strefa kontaktu
    Karkonosze
    folds
    deformation
    mica schist
    contact zone
    Karkonosze Massif
    Opis:
    We applied the detailed structural analysis to 394 outcrops in the southern and northern metamorphic cover of the Karkonosze Intrusion. We recognised five generations of fold structures: F1 -poorly preserved tight intrafoliation folds; F2 - the most common generation, with the whole variety of fold geometries, W-E and WSW-ENE-oriented fold axes in the northern contact zone, and W-E and WNW-ESE-oriented fold axes in the southern contact zone; F3 - chevron folds; F4 - kinkfolds observed only in the Stara Kamienica schist belt; and F5 - wide open folds, locally transformed into monoclinal kinkfolds, probably formed during the Variscan intrusion of the Karkonosze pluton. Similarity observed in the structural style in the northern and southern contact zones prove that these lithostratigraphic units had formed a single unit - the Izera-Kowary Unit - and had undergone the same deformational stages before the Karkonosze granitoid intrusion took place.
    Źródło:
    Przegląd Geologiczny; 2017, 65, 12; 1548--1554
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wstępne wyniki badań mineralizacji Au-Ag-Te, REE i PGM w złożach Fe-Ti-V suwalskiego masywu anortozytowego (północno-wschodnia Polska)
    Preliminary results of research on the Au-Ag-Te, REE and PGM mineralization in the Fe-Ti-V deposits of the Suwałki Anorthosite Massif (NE Poland)
    Autorzy:
    Ruszkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075827.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    pierwiastki ziem rzadkich
    anortozytowy masyw suwalski
    siarczki
    precious and REE elements
    Suwalki Anorthosite Massif
    sulphides
    Opis:
    Unique grain and nest-like accumulations of REE (La, Ce and Nd) nanoforms and precious (gold, platinum) elements were described from the Suwalki Anorthosite Massif (SAM). The dimensions of these forms vary from 15 to 175 p.m in diameter in Ni and Co sulphides, reaching 450 p.m in diameter in Cu sulphides. In the hydrothermally modified ore mineralization, separate small dispersed minerals of Te are visible. Numerous small inclusions of Te-minerals (0.4-0.7 mass %) were identified in hydrothermal Fe-Cu-Co-Ni sulphides, especially in millerite. They are grouped in smallforms that are elongated directly along the flow of hot solutions, 2-4 pm in size of a single inclusion. New results of polymetallic and precious metal sulphides together with dispersed REE mineralization may increase an economic value of the documented Fe-Ti-V deposits within the SAM.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 4; 219--221
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ewolucja basenu niecki miechowskiej w jurze jako rezultat regionalnych przemian tektonicznych
    Evolution of the Miechów Depression basin in the Jurassic as a result of regional tectonical changes
    Autorzy:
    Złonkiewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074456.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    niecka miechowska
    paleogeografia
    jura
    Miechów Depression
    Włoszczowa Massif
    Mid-Polish Trough
    Jurassic
    palaeotectonics
    oblique extension
    Opis:
    Evolution of a sedimentary basin in the Miechów Depression (MD) during the Jurassic was due to the synsedimentary tectonic activity of the Caledonian–Variscan structures. There was a local zone of maximal subsidence extending NW–SE in its area. The Włoszczowa Massif (WM) in the basement of the Permian-Mesozoic cover in central and NW part of theMD was an element of a little lesser subsidence in comparison to the adjacent NW and SE areas. A narrow graben in the Lasocin–Strzelce Dislocation Zone separated it from the Holy Cross Mts. Block (HCM). The Mid-Polish Trough invaded the MD from the NW. The edge of WM (Pilica Fault) limited a reach of the pre-Bathonian SE ingressions. In addition, transgression from an inland basin (from SE) developed since the Bathonian. Grabens and horsts elongated NNW–SSE were formed in the central part of MD. They continued further S-wards beyond the edge of the Carpathians. In the Callovian and Late Jurassic facial zones in the central and NW part of the MD were elongated NW–SE. The zone of major subsidence was located between Pągów and Kostki Małe and stretched further SE into the basin of the Carpathian Foreland. During the Late Oxfordian and Kimmeridgian the shallowest zone of the basinSWto theHCMwas located in theNpart of the WM. Structures formed in the MD area pointed at an oblique extension directed to NW. It was effected by palaeostress directed to NW, stronger in the NW part of the area and gradualy decreasing. The stress reactivated two oblique-slip fault systems: Kraków–Lubliniec and Lasocin–Strzelce. Also an increasing tension to W, stronger in its S part, might be recognized. It activated the Zawiercie Fault in the Late Bajocian and caused left-slip rotation of the WM in the Late Oxfordian. The tectonic model controlling sedimentation during the Latest Jurassic and Early Cretaceous was very similar to the pattern of subsiding and elevating zones formed in this area during Variscan compression. The Mid-Polish Trough was formed by dextral extension and reactivation of dislocations parallel to the edge of the East European Craton. The consolidated HCM-block belonged to a zone of elevated blocks, characteristic for the axial part of an extension basin.
    Źródło:
    Przegląd Geologiczny; 2006, 54, 6; 534-540
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania mineralizacji REE w utworach pokrywy osadowej masywu Tajna
    REE mineralization in the sedimentary cover of the Tajno Massif, NE Poland
    Autorzy:
    Dymowski, Witold
    Powiązania:
    https://bibliotekanauki.pl/articles/2076207.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    mineralizacja REE
    dolny trias
    środkowa jura
    masyw Tajna
    REE mineralization
    Lower Triassic
    Middle Jurassic
    Tajno Massif
    Opis:
    The paper presents a study of occurrences of REE mineralization in Lower Triassic and Middle Jurassic sedimentary rocks in the Tajno Massif, NE European Platform. Manifestations the REE mineralization occurin siltstones, sandstones, conglomerates and debris, and in other mixed weathered rocks.
    Źródło:
    Przegląd Geologiczny; 2021, 69, 7; 426--433
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola zróżnicowania wytrzymałości skał w genezie rzeźby Masywu Ślęży (Przedgórze Sudeckie)
    The role of spatial variability in rock strength in the origin of relief of the Ślęża Massif (Sudetic Foreland)
    Autorzy:
    Placek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074511.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    masyw Ślęży
    skała wytrzymała
    pochodzenie rzeźby terenu
    wiertarka Schmidta
    Ślęża Massif
    rock strength
    relief origin
    Schmidt hammer
    Opis:
    This article presents the results of rock hardness tests conducted in the Ślęża Massif to decipher the relationships between the geological structure and relief. It has been shown that all rock types of the massif represent similar mechanical strength. The highest mean strength was found in granite of the western slopes and the foothills of Mt. Ślęża, whereas the lowest strength is typical of gabbro from the central part of the massif, its summit and the eastern and southern slopes. Thus, the traditional concept emphasizing gabbro as being the most resistant rock has not been confirmed. There is also no evidence of higher strength of rocks within the massif, as compared to those in most of its surroundings. Variable mechanical strength is probably responsible for slope mesorelief (mid-slope benches and ridge lines), yet the hypothesis that the resistance of gabbro changes perpendicularly to the contact with granitoid intrusion has not received support. Higher mean Schmidt hammer rebound values and lower standard deviation occurring below 450 m a.s.l. are interpreted as a result of interaction between the structural factor and glacial exaration during the Odra Glaciation.
    Źródło:
    Przegląd Geologiczny; 2007, 55, 10; 861-869
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zarys budowy i ewolucji tektonicznej waryscyjskiej struktury Sudetów
    Outline structure and tectonic evolution of the Variscan Sudetes
    Autorzy:
    Mazur, S.
    Aleksandrowski, P.
    Szczepiński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074758.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Masyw Czeski
    paleozoik
    tektonostratygraficzne terrany
    tektonika
    deformacja
    uskoki przesuwcze/normalne
    Bohemian Massif
    Palaeozoic
    tectonostratigraphic terranes
    tectonics
    deformation
    strike-slip faults
    Opis:
    The structure and evolution of the Polish part of the Sudetes is reviewed on the basis of published data and interpretations. The Sudetic segment of the Variscides and its adjacent areas were subjected to multi-stage accretion during successive collisional events that followed closure of different segments of the Rheic Ocean. Early Variscan deformations culminated in the Late Devonian due to docking of the Armorican terrane assemblage to the southern margin of Laurussia. The Variscan orogenic activity continued into the Carboniferous and was associated with a new collision and intense folding and thrusting, followed by abundant magmatism, gravitational collapse and resulting exhumation of deeply buried metamorphic complexes as well as by inversion of the foreland basin. In the Sudetes, Variscan tectonostratigraphic units are tectonically juxtaposed and often bear record of contrasting exhumation/cooling paths, constrained by palaeontological and geochronological data. This provides evidence for the presence of allochthonous units, of partly cryptic tectonic sutures and an of overall collage-type tectonics of that area. The main lithostratigraphical components distinguished within the Sudetes are: 1) non-metamorphic to metamorphosed Neoproterozoic igneous suites accompanied by volcano-sedimentary successions, 2) Late Cambrian granitoids gneissified during the Variscan orogeny, 3) variously metamorphosed Ordovician through Devonian volcano-sedimentary successions deposited in pre-orogenic extensional basins, 4) dismembered fragments of a Late Silurian ophiolitic complex, 5) Devonian to Lower Carboniferous sedimentary successions of a passive continental margin, 6) Carboniferous granitoids, and 7) clastic sediments of Devonian and/or Early Carboniferous intramontane basins. All these components are assembled to form part of the internal Variscan orogenic zone largely exposed within the area of the Bohemian Massif. A three-partite subdivision of the Sudetes proposed here reflects different timing of deformation and exhumation of the respective segments. The Central, West and East Sudetes were deformed and amalgamated during the Middle/Late Devonian, at the turn of the Devonian and Carboniferous and during Early Carboniferous, respectively. Problems in extending the classical tectonostratigraphic zonation of the Variscides into the Sudetes are explained as due to activity of Late Palaeozoic strike-slip faults and shear zones, disrupting and dispersing the initially more simply distributed tectonostratigraphic units into the present-day structural mosaic.
    Źródło:
    Przegląd Geologiczny; 2010, 58, 2; 133-145
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strukturalne uwarunkowania rzeźby Wyżyny Lubelskiej i Roztocza
    Structural control on the relief in the Lublin Upland and the Roztocze region
    Autorzy:
    Dobrowolski, R.
    Harasimiuk, M.
    Brzezińska-Wójcik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075098.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    structural morphology
    structure of Upper Cretaceous rock massif
    neotectonics
    Lublin Upland
    Roztocze region
    struktura morfologiczna
    skalne stryuktury dolnokredowe
    masyw górski
    neotektonika
    Wyżyna Lubelska
    Roztocze
    Opis:
    The main relief features of the Lublin Upland (sensu Jahn, 1956) and Roztocze were formed during the early and middle Cenozoic stages of the Meta-Carpathian Ridge morphogenesis. They are clearly conditioned by the structure of the Upper Cretaceous-Palaeogene complex of the marginal part of the East European Craton. The following factors were of fundamental significance for the relief development in the study area: 1) Alpine and modern tectonic activity, which conditioned the horst nature of some morphostructures and the type of fissuring of rock massif, and 2) lithological diversity of the Upper Cretaceous-Palaeogene complex as well as the Miocene and Pliocene deposits, which influenced its strength features.
    Źródło:
    Przegląd Geologiczny; 2014, 62, 1; 51--56
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geologiczno-geofizyczna ocena perspektyw złożowych pierwotnych i wietrzeniowych minerałów tytanowych w rejonie ofiolitowego masywu Ślęży w Sudetach (SW Polska)
    Geologic and geophysical estimation of the prospect for ore deposit of the occurrences of primary and placer titanium minerals in the Ślęża Massif ophiolite, area, the Sudetes Mts (SW Poland)
    Autorzy:
    Wiszniewska, J.
    Petecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075531.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    masyw Ślęży
    minerały ciężkie
    złoża rud tytanu
    anomalia magnetyczna
    anomalia grawimetryczna
    Ophiolite Ślęża Massif
    placer heavy minerals
    titanium ore deposits
    magnetic anomaly
    gravimetric anomaly
    Opis:
    Miocene aged heavy mineral (HMin) alluvial cones and regolith sands above ore-bearing gabbro and amphibolite/diabase rock zone were considered as a prospective metallotect in the area of Devonian ophiolite Ślęża Massif in the Sudets (SW Poland). The available research data from the Sobótka region indicated that the ultramafic gabbro intrusion has an interesting titanium ore enrichment with minerals such as ilmenite and titanomagnetite in the Strzegomiany-Kunów primary ultramafic rocks. The mean composition of ore gabbro samples taken from the surface contained eg; Fe -14.21%, TiO2 - 4.92%, V2O5 - 0,15. Conducted geophysical surveys in the vicinity of the presumed gabbroic rocks at thin Quaternary sediments cover, suggested the variable content ofa primary mineralization, which could be related to the increased content of heavy minerals fractions over the bed in the form of regolith or as a secondary deposit. Titanium minerals such as ilmenite, sphene, were enriched during the oxidation process and created secondary bed, where the concentrates of titanium oxides: rutile, leucoxene or oxidized ilmenite may have a high titanium content as high as 70-90%. Placer HMin sands are at present a major source of titanium deposits worldwide and the largest industrial value due to their large resources, simplicity and purity of exploitation and the ability to yield concentrates of HMin: ilmenite, rutile, pseudobrookite, anatase and leucoxene, sometimes in the company of valuable zircon, monazite or garnet. These deposits in the world are mainly used in metallurgical and chemical industries, eg; the production ofpaints and pigments used in the pharmacy, paper and paint industry. Similar observations have been reported from the region of Spain, Portugal, western Australia andfrom the south of India. Preliminary results of presented study indicate that the Strzegomiany-Kunów region can be considered as prospective not only because of the presence ofprimary titanium mineralization in gabbro, especially in diallage gabbro, amphibolite (diabase) and serpentinite, but also a presence of enriched titanium mineralization in regolith over gabbro and in clastic sediments on the foreland of Ślęża Massif.
    Źródło:
    Przegląd Geologiczny; 2016, 64, 9; 650--656
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wstępne rozpoznanie obwódek cyrkonowo-hafnowych wokół minerałów kruszcowych w złożach Fe-Ti-V w suwalskim masywie anortozytowym (północno-wschodnia Polska)
    Initial recognition of zirconium-hafnium rims around ore minerals in the Fe-Ti-V deposits, Suwałki Anorthosite Massif (NE Poland)
    Autorzy:
    Ruszkowski, M.
    Wiszniewska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075864.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    obwódki cyrkonowo-hafnowe
    suwalski masyw anortozytowy
    SAM
    złoża Fe-Ti-V
    północno-wschodnia Polska
    zirconium-hafnium rims
    Suwałki Anorthosite Massif
    Fe-Ti-V deposits
    NE Poland
    Opis:
    Zirconium-hafnium rims were discovered and described for the first time within the Suwalki Anorthosite Massif (SAM). They are observed at boundaries of Fe-Ti oxides ilmenite, hematitoilmenite and titanomagnetite with plagioclases. The most frequent forms reach 80-250 μm in length and 4-30 μm in width. These are narrow rims covering even up to 70% ore mineral grains. The most spectacular forms were "blown candle flame” structures. Their average width ranges from 20 to 45 μm and the length exceeds 350 μm in . Chemical composition analysis was carried out on the largest clusters of zircon crystals/rims which show high local enrichment in Hf (0.5-0.8% by weight). The boundaries of these crystals are cracked and blurry. This may suggest their participation in later fluids inflow processes within the rocks. The enrichment in hafnium content in zircon grains, is related to significant reduction in the amount of Th, U and Pb and increased amount- sof Ti and Fe in zircon rims. A large variety of forms and variability of their chemical composition point to a complex physical chemical orgin process.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 2; 107--110
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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