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    Wyświetlanie 1-14 z 14
    Tytuł:
    Występowanie rud uranu i perspektywy ich poszukiwań w Polsce
    Occurrences of uranium ore in Poland and possibilities for prospecting for uranium deposits
    Autorzy:
    Nieć, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/282809.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    złoża uranu
    poszukiwania
    Polska
    uranium ore deposits
    prospecting
    Polska
    Opis:
    Analiza stanu znajomości złóż uranu i perspektyw ich poszukiwania w Polsce pozwala na sformułowanie poglądu o celowości podjęcia prac badawczych i bardziej zaawansowanych prac poszukiwawczych rekonesansowych oraz poszukiwawczych wstępnych w wytypowanych obszarach. W Sudetach można oczekiwać złóż związanych z metasomatytami alkalicznymi, śródgranitowych oraz piaskowcowych (w osadach najwyższego karbonu i kredowych). Na monoklinie przedsudeckiej, peryklinie Żar i w syneklizie perybałtyckiej można oczekiwać złóż piaskowcowych w utworach triasu. Wskazane jest podjecie prac badawczych w celu potwierdzenia lub wykluczenia możliwości ich występowania.Złoża udokumentowane, ubogie: Rajsk w ordowickch w łupkach dictyonemowych, na Podlasiu, Okrzeszyn w łupkach węglistych i węglach wdepresji wewnętrznosudeckiej, Wambierzyce-Radków w łupkach walchiowych, stanowią potencjalna bazę zasobową, możliwą do zagospodarowania jeśli nastąpi istotny postęp w technologii wykorzystywaniu tego typu rud.
    The review of the state of knowledge of uranium ore in Poland suggests the possibilities of finding concealed uranium deposits. The respective study of their possible mode of occurrences, reconnaissance and preliminary prospecting in preliminary designed areas should be undertaken. Such areas exist in Sudety Mountains and in North East Poland. In Sudety Mt. The vein intragranitic, alkaline metasomatite related and sandstone type (in upper Carboniferous and Cretaceous formation) deposit could be expected. On Foresudetic monocline, Żary pericline and Peribaltic syneclise sandstone type deposits in Triassic sandstone may occur. More advanced study on their possible mode occurrence and prospecting premises are recommended. Known low quality deposits Rajsk in the Ordovician dictyonema shales in North East Poland, Okrzeszyn in carbonaceous shales and coals in Intrasudetic depression and Wambierzyce-Radków in walchia shales contains ore resources which utilization would be possible if considerable progress will be gained in uranium recovery from such lean ores.
    Źródło:
    Polityka Energetyczna; 2009, T. 12, z. 2/2; 435-451
    1429-6675
    Pojawia się w:
    Polityka Energetyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Założenia dla nowych projektów wierceń poszukiwawczo-badawczych rud metali w Polsce
    Substantial principals of new ore metals prospecting-research drilling projects in Poland
    Autorzy:
    Mikulski, S.Z.
    Speczik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2063089.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    złoto
    miedź
    molibden
    cynk
    wanad
    złoża rud metali
    wiercenia poszukiwawczo-badawcze
    gold
    copper
    molybdenum
    zinc
    vanadium
    metallic ore deposits
    ore prospecting
    Polska
    Opis:
    W 2006 r., w Państwowym Instytucie Geologicznym, w ramach zadań statutowych, przeprowadzono analizę prac geologicznych związanych z poszukiwaniem rud metali, w celu opracowania założeń projektu wierceń poszukiwawczo-badawczych dla rozwiązania najistotniejszych zagadnień surowcowych Polski. Zaprojektowanych zostało 20 wierceń poszukiwawczo-badawczych, o całkowitym metrażu ok. 9 tys. m, w tym 12 wierceń płytkich od 70 do 300 m oraz 8 głębokich wierceń od 600 do 1200 m. Opracowano wstępne projekty wierceń poszukiwawczo-badawczych rud: (1) Au w Sudetach i na bloku przedsudeckim, (2) Cu i/lub Au w utworach cechsztyńskich w Sudetach i na peryklinie Żar, (3) Mo–Cu typu porfirowego i (4) Zn–Pb typu MVT, w strefie kontaktu bloku małopolskiego z górnośląskim oraz (5) Ti–V w rejonie Ślęży na bloku przedsudeckim. Realizacja tych projektów wierceń pozwoli zweryfikować perspektywiczność w/w obszarów pod względem surowcowym, a w przypadku uzyskania pozytywnych rezultatów będzie miała podstawowe znaczenie dla dalszych prac poszukiwawczo-dokumentacyjnych. Ponadto umożliwi rozpoznanie budowy geologicznej w tym istotnych formacji rudonośnych.
    On the base of Polish Geological Institute detailed analyses of archive geological materials the principals for new ore metals projects were established to solve important questions considering the future metal perspectives in Poland. Twenty location of the foreseen prospecting-research boreholes were selected of total length ca. 9 thousands meters. Among them 12 shallow boreholes from 70 to 300 m deep and 8 boreholes from 600 to 1200mdeep. The geological prospecting-research projects were prepared for the following perspective ores: (1) Auin Sudetes and on the Fore-Sudetic Block, (2) Cu and/orAuin Zechstein sediments in Sudetes and on the Żary Pericline, (3)Mo–Cuof porphyry type and (4) Zn–Pb of MVT type in the contact zone of Małopolska and Górnośląski Blocks (5) Ti–V in the Ślęża region on the Fore-Sudetic Block. The outcome of the considering drilling projects will have important meaning for increasing the perspective metal resources of the country. This project substantially develop recognition of the geological structure including important ore formation in Poland.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 333--337
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeoenvironmental reconstruction of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
    Autorzy:
    Gedl, P.
    Kaim, A.
    Leonowicz, P.
    Boczarowski, A.
    Dudek, T.
    Kędzierski, M.
    Rees, J.
    Smoleń, J.
    Szczepanik, P.
    Sztajner, P.
    Witkowska, M.
    Ziaja, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/138742.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    beton
    iły rudonośne
    jura
    paleośrodowisko
    Polska
    Bathonian
    Jurassic
    ore-bearing clays
    palaeoenvironment
    Polska
    Opis:
    Multidisciplinary studies of the Middle-Upper Bathonian ore-bearing clays at Gnaszyn revealed variable palaeoenvironmental conditions during the deposition of this seemingly monotonous sequence. We interpret the conditions in the bottom environment and the photic zone, and also evaluate the influence of the adjacent land areas, based on sedimentology, geochemistry, sporomorphs and palynofacies composition, benthic (foraminifera, gastropods, bivalves, scaphopods, echinoderms), planktonic (calcareous nannoplankton, dinoflagellate cysts), and nektonic (sharks) fossils. The Gnaszyn succession originated relatively close to the shore, within reach of an intense supply of terrestrial fine clastic and organic particles. The latter are mainly of terrestrial origin and range from 1.5 to 2.5 wt.%. The precise water depth is difficult to estimate but most likely ranges from several tens of metres to a few hundred metres. All fossil groups show minor changes throughout the succession. As the climate seems to have been quite stable during this period we consider sea-level fluctuations to have been the main factor responsible for the changes. The terrestrial input, including freshwater and land-derived clastic and organic particles (sporomorphs and cuticles), increased during periods of sea-level lowstand. As a consequence, stress conditions (lower salinity, higher nutrient availability, lower water transparency) in the photic zone caused blooms of opportunistic planktonic taxa. Furthermore, a faster sedimentation rate led to oxygen depletion and deterioration of the living conditions in the bottom environment due to an increased accumulation of organic matter. As a result, the benthic biota became taxonomically impoverished and commonly dominated by juvenile forms. During periods of high sea level, the source areas were shifted away from the basin, resulting in a decrease in the terrestrial influx, increase in the salinity of surface waters, the appearance of more diverse phytoplankton assemblages, a lower sedimentation rate, and an improvement of living conditions at the bottom.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 463-484
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A dinosaur track assemblage from the Upper Hettangian (Lower Jurassic) marginal-marine deposits of Zapniów, Holy Cross Mountains, Poland
    Autorzy:
    Niedźwiedzki, G.
    Pieńkowski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060538.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    dinosaur tracks
    Przysucha Ore-bearing Formation
    Upper Hettangian
    Lower Jurassic
    Holy Cross Mountains
    Polska
    Opis:
    Upper Hettangian (Lower Jurassic) marginal-marine Przysucha Ore-bearing Formation exposed at Zapniów mine and clay-pit (northwestern part of the Holy Cross Mountains area, central Poland) revealed an interesting assemblage of dinosaur tracks. Although mostly yielding poorly preserved and isolated tracks probably left in shallow water conditions, the site nevertheless indicates a diversity of early saurischian (theropods and sauropodomorphs) and ornithischian (thyreophorans) dinosaur trackmakers. This new assemblage is partly consistent with the Lower-Middle Hettangian ichnorecord from the same region. The tracks are preserved in sediments of a barrier-foreshore origin within a barrier/lagoonal depositional system, belonging to the highstand systems tract, located below a marked erosional surface (sequence boundary), which is associated with a substantial fall in sea level at the end of Hettangian times. Here we described all previously and newly collected or observed in the field dinosaur tracks from both surface and underground exposures at Zapniów. Four ichnospecies: Grallator isp., Anchisauripus isp., cf. Tetrasauropus isp., and cf. Anomoepus isp. were identified. The theropod and ornithischian tracks show distinct similarities to those described from the richest in this region and most famous Gliniany Las dinosaur track assemblage, in age approximately coeval to Zapniów. Two sizes of theropod tracks (small and medium) indicate the presence of two different size classes or species of predators in this area. The described cf. Tetrasauropus isp. from Zapniów is the first unquestioned evidence of basal sauropodomorphs in the Upper Hettangian of the Holy Cross Mountains and first record of this ichnotaxa in the Lower Jurassic of Poland. Additionally, two theropod trackways (Anchisauripus isp.) show evidence for trotting. The new finds suggest similarities between marginal-marine environments (delta-plain and foreshore-barrier/lagoon lithofacies) association of dinosaurs containing low-browsing thyreophorans accompanied by small or juvenile sauropodomorphs and small to medium sized theropods. Presence of the ornithischian footprints suggests their prominent role as a major component in Middle-Upper Hettangian dinosaur faunas in marginal-marine environments dominating in the region.
    Źródło:
    Geological Quarterly; 2016, 60, 4; 840--856
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Faunal dynamics of gastropods in the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
    Autorzy:
    Kaim, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/138635.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    Gnaszyn
    iły rudonośne
    jura
    paleoekologia
    Polska
    ślimaki
    Bathonian
    gastropods
    Jurassic
    ore-bearing clays
    palaeoecology
    Polska
    Opis:
    The succession of gastropods in the Gnaszyn section is quite monotonous and shows significant changes only in the proximity of concretion layers, at least partially because of diagenetic reasons. Otherwise, the section is dominated by gastropods (cylidrobullinids, bullinids, and mathildids) most of which preyed probably on sedentary organisms (polychaetes and/or coelenterates) that possibly flourished on the sea bottom at that time. The other groups of gastropods are represented by larval or juvenile shells. Their presence shows that the environmental conditions that were probably unfavourable for gastropods living directly on the sea bottom most likely because of a soupy substrate consistency, possible oxygen deficiency near the sediment-water interface and/or oxygen content fluctuations. Adult and/or subadult individuals of these gastropods occur only in the higher part of the section, reflecting a time when these conditions improved. A new heterostrophic gastropod species, Promathildia gedli, is described.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 367-380
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeoenvironmental interpretation of echinoderm assemblages from Bathonian ore-bearing clays at Gnaszyn (Kraków-Silesia Homocline, Poland)
    Autorzy:
    Boczarowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/138733.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    iły rudonośne
    jura środkowa
    paleośrodowisko
    Polska
    szkarłupnie
    Bathonian
    echinoderms
    Middle Jurassic
    ore-bearing clays
    palaeoenvironment
    Polska
    Opis:
    This paper presents the results of an investigation into the variability of echinoderm assemblages from Bathonian ore-bearing clays from Gnaszyn. Remains of Crinoidea, Asteroidea, Ophiuroidea, Echinoidea, and Holothuroidea have been studied from 38 rock samples. The most common echinoderms represented are the crinoids Balanocrinus berchteni and Chariocrinus andreae and a few species of the holothurian genera Priscopedatus, Calclamna, Staurocaudina, Eocaudina, Achistrum, Theelia and Hemisphaeranthos. The echinoderms from Gnaszyn show various life strategies: benthic or epibenthic forms, sessile sestonophages (Crinoidea), motile macrophages (Asteroidea) and detritivores (Asteroidea, Ophiuroidea, Echinoidea), infaunal and epifaunal detritus feeders, sediment feeders or rake-feeders (Holothuroidea). Their presence suggests well oxygenated and presumably relatively cold bottom marine waters. The parts of the Gnaszyn section around concretion horizons and characterized by the ubiquitous occurrence of the holothurian Theelia and echinoids were deposited during phases of optimal living conditions with sufficient influx of plant detritus and good oxygenation of the sea bottom. These parts commonly host echinoderm associations dominated by crinoid remains, which occasionally are still articulated (or disarticulated but remaining intact) - this points to a quiet environment with normal oxygenation of the bottom waters but anaerobic/dysaerobic conditions in the sediment.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 351-366
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrothermal ore mineralization from the Polish part of the Tatra Mts., Central Western Carpathians
    Autorzy:
    Sitarz, Magdalena
    Gołębiowska, Bożena
    Nejbert, Krzysztof
    Dimitrova, Dimitrina
    Milovský, Ratislav
    Powiązania:
    https://bibliotekanauki.pl/articles/2055847.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    tetrahedrite
    hydrotherma ore mineralization
    fluid inclusions
    LA-ICP-MS study
    Tatric Superunit
    Polish part of the Western Tatra Mts.
    Polska
    Opis:
    Several areas with hydrothermal ore mineralization are present in the Polish part of the Western Tatra Mts. Massive and disseminated sulfides, mainly minerals from the tetrahedrite group and chalcopyrite, fill quartz veins accompanied by siderite, dolomite and baryte – many of these were mined between the 16th and 18th century. This paper presents information on the mineralogy of the common sulfides and the preliminary studies of both the isotopic composition of sulfur in tetrahedrite as well as the origin of hydrothermal fluids. The most common primary sulfide minerals in the ores are tetrahedrite-(Zn) and tetrahedrite-(Fe) corresponding to Zn ranges from 1.83 to 5.87 wt.% (0.47–1.44 apfu), and Fe from 1.63 to 5.05 wt.% (0.48–1.52 apfu). The substitution of As for Sb shows maximum As content of 7.25 wt.% (1.588 apfu) which corresponds to the Sb/(Sb+As) = 0.60. Both varieties show substitutions of Bi and Hg, up 0.6 wt.% (0.049 apfu) and 0.96 wt.% (0.081 apfu), respectively, and content of trace elements: Co (max. 976 ppm), Cd (max. 735 ppm), In (max. 14 ppm). Chalcopyrite, pyrite, and galena show compositions close to the ideal formula. Differences in the content of trace elements in the studied tetrahedrite and chalcopyrite were explained by element partitioning between these minerals. The distributions of In, Ga and Sn in the studied minerals indicate that the mineralization was formed at low temperature and pressure. The homogenization temperature of the primary inclusions in quartz in the range of 120–174°C indicate the origin of mineralization in low temperature stage from low salinity fluids (up to 17.92 wt.% NaCl eq.). Stable δ34S isotopes in minerals of the tetrahedrite group suggest that the igneous fluids might be one of the sources from which ores were crystallized.
    Źródło:
    Geology, Geophysics and Environment; 2021, 47, 3; 159--179
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentology of the “ore-bearing dolomite” of the Kraków-Silesia region (Middle Triassic, southern Poland)
    Autorzy:
    Matysik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191964.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    ore-bearing dolomite
    epigenetic dolomitization
    lead-zinc mineralization
    facies pattern
    peritidal and subtidal facies
    Middle Triassic
    muschelkalk
    Upper Silesia
    Polska
    Opis:
    The depositional history and facies heterogeneity of the epigenetically dolomitized Middle Triassic carbonates of southern Poland are poorly recognized, and existing concepts of fluid circulation entirely overlook the primary lithology as a factor controlling fluid flow. This study reconstructs the consecutive phases of Kraków-Silesia Sub-basin history in the Anisian and highlights their influence on the development of the so-called “ore-bearing dolomite”. Extensive fieldwork and microfacies analyses were carried out in order to decipher the original depositional fabric of the ore-bearing dolomites. As a rule, epigenetic dolomitization affected a horizon of porous strata, 35 m thick and resting directly on impermeable, wavy-nodular clay-rich calcilutites of the Gogolin Formation, which represent the interval of deepest and fully marine (offshore) sedimentation. The sedimentary succession of the porous strata is bipartite. The lower part (Olkusz Beds) is composed of Balanoglossites and Thalassinoides micritic firmgrounds and peloidal packstones-grainstones, representing shoreface-foreshore facies assemblages, whereas the upper part (Diplopora Beds) consists of dolocretes, rhizolites, cryptalgal laminites, peloidal packstones-grainstones and bioturbated fine-grained dolostones, formed in a system of tidal flats and lagoons. These two parts are separated by a subaerial disconformity, which marks a sequence boundary. During emersion, the underlying deposits were subjected to meteoric diagenesis, which led to the development of moldic porosity. This combination of depositional history and diagenetic alteration determined the routes of initial migration of dolomitizing solutions on the one hand, and the location of cavern formation on the other. Owing to progressive dissolution, small caverns were changed into large karstic forms, in which the ore minerals precipitated ultimately. These findings emphasize the importance of sedimentological analysis to the understanding of the evolution of the Kraków-Silesia ore province.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 2; 81-112
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Faunal dynamics of bivalves and scaphopods in the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
    Autorzy:
    Kaim, A.
    Sztajner, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/138633.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    Gnaszyn
    iły rudonośne
    jura
    łódkonogi
    małże
    paleoekologia
    Polska
    ślimaki
    Bathonian
    bivalves
    gastropods
    Jurassic
    ore-bearing clays
    palaeoecology
    Polska
    Scaphopods
    Opis:
    The environment at the Gnaszyn section - as deduced from bivalve and scaphopod dynamics - was controlled by the substrate consistency and possibly oxygen deficiency near the sediment-water interface and/or oxygen content fluctuations. The middle part of the section dominated by nuculoid and corbulid bivalves and Laevidentalium-type scaphopods probably reflects a soupy substrate and possibly oxygen deficiency in the sediment. Slightly coarser and better-oxygenated silts in the upper and lower parts of the section offered a less soupy substrate consistency, allowing the development of communities dominated by astartids, byssate bivalves, and Dentalium- and Plagioglypta-type scaphopods.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 381-395
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An introduction to the palaeoenvironmental reconstruction of the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
    Autorzy:
    Gedl, P.
    Kaim, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/138596.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    iły rudonośne
    jura środkowa
    monoklina śląsko-krakowska
    osady
    Polska
    Bathonian ore-bearing clays
    Dark deposits
    Kraków-Silesia Homocline
    Middle Jurassic
    Polska
    Opis:
    This paper provides introductory data for multidisciplinary studies on palaeoenvironmental reconstructions of the Bathonian (Middle Jurassic) ore-bearing clays exposed at Gnaszyn, southern Poland. These dark-coloured fine-clastic deposits have been studied for micropalaeontology, sedimentology and geochemistry (published in separate papers within this volume). Brief outlines of the Middle Jurassic palaeogeography of the Polish epicontinental basin and the geology of the Kraków-Silesia Homocline are given. A description of the ore-bearing clays succession exposed in the clay-pit at Gnaszyn is provided, including locations of the sections studied, their ammonite biostratigraphy, brief lithology and macrofossil distribution. The sample positions collected for micropalaeontological and geochemical studies are specified.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 267-280
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inwersyjne obrazowanie oporu w rejonie złoża Zn-Pb Zawiercie Źródłem informacji na temat budowy geologicznej
    Application of electrical resistivity tomography (ERT) in the Zawiercie Zn-Pb ore area as a source of information on the geological structure
    Autorzy:
    Cabała, J.
    Jochymczyk, K.
    Poręba, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074512.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    inwersyjne obrazowanie oporu
    geofizyczny pomiar
    złoża w rejonie Zn-Pb Zawiercie
    Polska
    electrical resistivity tomography
    geophysical survey
    Zawiercie Zn-Pb ore deposits
    Polska
    Opis:
    The depletion of Zn-Pb ores in developed mining areas and the increase in metal prices have resulted in the need to search for new deposits which have not been exploited yet. A project of drilling new exploratory boreholes should be preceded by an interpretation of archival geological data. To obtain the most valuable information on the geological structure leading to its plausible interpretation, it seems to be purposeful and advisable to apply some geophysical methods that are reasonably cheap in comparison with others. The method of electrical resistivity tomography, which in this research uses two of many measurement protocols such as Schlumberger array and dipole-dipole array, is particularly useful. Computer interpretation of geophysical results allows a high resolution 2D and 3D geoelectrical model of rock mass to be created. The study was carried out using the multi-electrode Lund Imaging System manufactured by ABEM, Sweden. In order to evaluate the practical application of this method, Zawiercie Zn-Pb ore deposits were chosen as the area used in previous scientific research. Taking into account mineralization in its economic aspect, the deposits occur at relatively shallow depths of 50-120 m. In the investigated region, the Triassic carbonate formation overlays the Devonian rocks. The Keuper low-resistance clay, occurring on the surface, provides a very good electrical contact between an electrode and the soil. This is why there are favourable measurement conditions in this area. The boundaries between the Keuper, Devonian and Triassic formations are clearly noticeable in the resistivity cross-sections obtained. On the basis of the ERT results, it is possible to locate faulting zones as well as karst systems. One of the profiles clearly shows the occurrence of a low-resistance anomaly correlated with Zn-Pb mineralization, which was confirmed by borehole surveys. However, this early stage of the research with the use of the ERT method cannot unequivocally identify the ore body, particularly as it was conditioned by the limited depth of prospecting.
    Źródło:
    Przegląd Geologiczny; 2007, 55, 10; 380-386
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palynofacies from Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland, with special emphasis on sporomorph eco-groups
    Autorzy:
    Gedl, P.
    Ziaja, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/138745.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    epikontynentalny zbiornik
    iły rudonośne
    jura środkowa
    paleogegrafia
    palinofacja
    Polska
    sporomorf
    Bathonian
    epicontinental basin
    Middle Jurassic
    ore-bearing clays
    palaeogeography
    palynofacies
    Polska
    sporomorphs
    Opis:
    The palynological organic matter of dark clays from Bathonian ore-bearing clays exposed at Gnaszyn (Częstochowa, Kraków-Silesia Homocline, Poland) consists of high proportions of land-derived particles; aquatic elements (mainly dinoflagellate cysts) are comparatively rare. Terrestrial particles include black opaque phytoclasts, dark brown phytoclasts, cuticle remains and subordinate sporomorphs. The latter are represented by eighty-four taxa of spores and pollen grains. They represent various groups of plants, including Bryophyta, Sphenophyta, Lycophyta, Pteridophyta, Pteridospermophyta, Cycadophyta or Ginkgophyta and Coniferophyta. The most frequent sporomorphs in almost all samples from Gnaszyn are Callialasporites (Araucariaceae), Cerebropollenites and Perinopollenites elatoides (Taxodiaceae) pollen grains, fern spores with triradiate tetrad mark, bisaccate pollen grains belonging to conifers (Pinaceae or Podocarpaceae) and also to Pteridospermophyta. Quantitative analysis of the palynofacies shows fluctuations of particular element ratios, which correlate with lithology. Clay intervals that contain siderite concretion levels yielded lower amounts of cuticles in relation to sporomorphs (mainly pollen grains) and dinoflagellate cysts. Intervals of monotonous clays and silts are characterized by a higher ratio of cuticles in relation to other elements, especially dinoflagellate cysts. Also, quantitative analysis of the sporomorphs shows changes in frequency of the representatives of various plant communities, which coexisted during the Jurassic: Upland, Lowland, River, Pioneer, Coastal and Tidally-influenced. These changes might have reflected sealevel fluctuations, which affected vegetation growing on adjacent land. However, the dominance of Callialasporites pollen grains, which belong to the Coastal community, indicates that the Gnaszyn assemblage was mainly influenced by the seashore vegetation. The high frequency of Araucariaceae pollen grains and the presence of ferns representing the Osmundaceae, Cyatheaceae, Dicksoniaceae, Schizeaceae, Gleicheniaceae and Matoniaceae indicate a warm climate without large seasonal amplitudes during the deposition of the Gnaszyn succession.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 325-349
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic-walled dinoflagellate cysts from the Bathonian ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland - a palaeoenvironmental approach
    Autorzy:
    Gedl, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/138764.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    baton
    dinocysty
    iły rudonośne
    jura środkowa
    monoklina śląsko-krakowska
    paleośrodowisko
    Polska
    Bathonian
    dinoflagellate cysts
    Kraków-Silesia Homocline
    Middle Jurassic
    ore-bearing clays
    palaeoenvironment
    Polska
    Opis:
    A succession of Middle-Upper Bathonian (Subcontractus.Retrocostatum zones) ore-bearing clays exposed at Gnaszyn has been investigated for the presence of dinoflagellate cysts. The assemblages are dominated by Ctenidodinium. However, analysis of diversity shows some subtle differences throughout the succession, possibly related to the palaeoenvironmental conditions in the photic zone. Impoverished assemblages, dominated by Ctenidodinium, occur mainly in monotonous muddy intervals. More diverse assemblages, albeit also dominated by Ctenidodinium, occur in intervals which contain siderite concretion levels. The taxonomic composition of the former assemblage seems to reflect slightly restricted conditions in the photic zone, possibly related to a minor reduction in salinity and/or increase in nutrient availability. More diverse dinoflagellate cyst assemblages reflect periods of less intense terrigenous influx and relatively higher, possibly normal, salinity. These changes were possibly caused by variable intensity of freshwater influx into the basin, controlled by sea-level fluctuations. Sea-level changes may be related to migrations of Tethyan water masses, which were probably partly responsible for the composition of the dinoflagellate cyst assemblages.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 439-461
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentology and ichnology of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
    Autorzy:
    Leonowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/138978.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ciemnoszare mułowce
    iły rudonośne
    jura środkowa
    monoklina śląsko-krakowska
    Polska
    zespół skamieniałości śladowych
    Dark grey mudstones
    Kraków-Silesia Homocline
    Middle Jurassic
    ore-bearing clays
    Polska
    Trace fossil tiering
    Opis:
    The lithology, sedimentary structures and trace fossil association from the Bathonian organic-rich mudstones from Kraków-Silesia Homocline (SW Poland) are described and a preliminary interpretation of the palaeoenvironment is presented. The ore-bearing clays exposed in the Gnaszyn clay-pit are developed as dark grey claysilt deposits with a few horizons of sideritic concretions. Sedimentological analysis has revealed that these deposits originated in the offshore part of a marine basin, below the fair weather wave base. Relict parallel lamination suggests that the predominant mechanism of deposition was quiet settling from suspension. However, locally preserved storm deposits indicate that the sea bottom was affected by offshore flows, deriving coarser material from the nearshore area. The degree of bioturbation is high but the diversity of the trace-fossil association is low. It consists mainly of Chondrites, Trichichnus, pyritized burrows and less common Palaeophycus. Other traces, including Thalassinoides, Planolites, Taenidium and some undetermined burrows, occur mainly in the lower part of the succession. This ichnoassociation combines features of distal Cruziana and Zoophycos ichnofacies, suggesting poor oxygenation of the bottom sediment. Temporary improvements in bottom oxygenation, linked with more intense mixing of water during major storms, resulted in the more diverse trace fossil suite that is found in some intervals of the succession.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 3; 281-296
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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