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    Wyświetlanie 1-5 z 5
    Tytuł:
    Pierwiastki ziem rzadkich w kwaśnych wodach kopalnianych : zarys problematyki
    Rare earth elements in acid mine drainage waters : an outline of the issues
    Autorzy:
    Migaszewski, Zdzisław M.
    Gałuszka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075910.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    kwaśne wody kopalniane
    pierwiastki ziem rzadkich
    cechy
    anomalie
    występowanie
    interakcje geochemiczne
    acid mine drainage
    rare earth elements
    characteristics
    anomalies
    occurrence
    geochemical interactions
    Opis:
    This paper presents the brief characteristics of rare earth elements (REE) and their occurrence in acid mine drainage (AMD) waters. The special emphasis is laid on REE classification, computation of shale-normalized coefficients and interpretation of REE anomalies. This paper also outlines the REE behavior in the environment, geochemical interactions and their potential application for assessing an impact of AMD on the environment.
    Źródło:
    Przegląd Geologiczny; 2019, 67, 2; 105--114
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemical background - an environmental perspective
    Autorzy:
    Gałuszka, Agnieszka
    Migaszewski, Zdzisław M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086496.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    geochemical background
    environmental quality criteria
    anthropogenic impact
    pollution source identification
    Opis:
    This article presents the concept of geochemical background from an environmental perspective. The idea of establishing the typical concentrations of elements in various environmental compartments, proposed by exploratory geochemists almost 50 years ago was important for the detection of anomalous element concentrations, thus providing a basic tool in the search for new mineral deposits. At present, the knowledge of the geochemical background of hazardous elements is essential for: defining pollution, identifying the source of contamination, and for establishing reliable environmental quality criteria for soils, sediments and surface waters. The article presents geochemical methods of evaluation of anthropogenic influence on the environment and discusses the problem of defining and understanding the term “geochemical background” and related terms in environmental sciences. It also briefly presents methods of geochemical background evaluation based on the results of environmental sample analyses. It stresses the role of geochemical background in our understanding of environmental pollution and pollution prevention.
    Źródło:
    Mineralogia; 2011, 42, 1; 7--17
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The 1st Conference on Contemporary Problems of Geochemistry
    Autorzy:
    Migaszewski, Zdzisław M.
    Gałuszka, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2086497.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    acid mine drainage
    pollution sources
    acid precipitation
    natural disasters
    Opis:
    This issue of “Mineralogy” includes selected papers based on some oral and poster presentations of the 1st Geochemical Conference on “Contemporary Problems of Geochemistry” organized by the Geochemical Group of the Mineralogical Society of Poland and Jan Kochanowski University in Kielce. The conference was held at the Institute of Chemistry of Jan Kochanowski University in Kielce on 27–30 September 2010.
    Źródło:
    Mineralogia; 2011, 42, 1; 3--5
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Xenotime from the Podwiśniówka mine pit, Holy Cross Mountains (South-Central Poland)
    Autorzy:
    Migaszewski, Zdzisław M.
    Gałuszka, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2086505.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    xenotime
    Wiśniówka Sandstone Fm
    Podwiśniówka mine pit
    Holy Cross Mts
    Polska
    TESZ
    Opis:
    This report presents the results of petrographical and mineralogical (optical microscopy, SEM/EDS) study of xenotime derived from the Upper (Middle?) Cambrian rocks (Wiśniówka Sandstone Fm.) of the abandoned Podwiśniówka mine pit. This is the first work on this mineral from the Holy Cross Mts. The authigenic xenotime occurs primarily as overgrowths around/on zircon in siliciclastic rocks. Moreover, this mineral is characterized by the large size of the overgrowths reaching 50 μm long and 20 μm wide. The presence of pyritecoated zircon/xenotime aggregates indicates that the xenotime formed prior to hydrothermal quartz-pyrite mineralization. The apparent lack of xenotime and vein pyrite in the tuff-bearing series, compared to the other two series displaying hydrothermal signature (pyrite, hematite, nacrite, jarosite), as well as considerable variations of the xenotime overgrowths in size and morphology, and their dominant irregular patchy-zonal microtexture may provide evidence for direct precipitation of this mineral from hydrothermal fluids.
    Źródło:
    Mineralogia; 2010, 41, 1/2; 3--9
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    REE-bearing minerals in sediment-hosted stratiform pyrite mineralization zones of the Wiśniówka area (Holy Cross Mts., Poland)
    Autorzy:
    Migaszewski, Zdzisław M.
    Gałuszka, Agnieszka
    Zielińśki, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/31342963.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    siliciclastic rocks
    REE-bearing minerals
    geochemical analysis
    SEM-EDS
    EMPA
    REE-mineral provenance
    Wiśniówka area
    Polska
    Opis:
    There are two arsenical pyrite (As-FeS2mineralization zones cropping out in the Podwiśniówka and Wiśniówka Duża quarries where quartzites and quartzitic sandstones have been extracted for over a century. A large amount of pyrite in the Wiśniówka siliciclastics is unusual in the hard rock mining throughout the world. The pyritiferous beds contain a variety of REE-bearing minerals, including a crandallite series of aluminum-phosphate-sulfate (APS) minerals, e.g., predominant goyazite SrHAl3[(PO4)2(OH)6] with subordinate gorceixite BaHAl3[(PO4)2(OH)6] and very occasional crandallite CaHAl3[(PO4)2(OH)6]. By contrast, the other REE-phosphate minerals, e.g., xenotime YPO4, bur particularly monazite CePO4 occur in a lesser amount. Goyazite prevails somewhat in the Podwiśniówka beds whereas xenotime in the Wiśniówka Duża beds. Of the other REE-bearing minerals, bastnäsite REECO3(F,OH), florencite (REE)Al3(PO4)2(OH)6 and synchysite CaCe[CO3]2F occur in trace amounts. Interestingly, the quite common phosphate minerals, i.e., wavellite (Al.3[(OH,F)3|(PO4)2]×5H2O and variscite Al[PO4]×2H2O) are depleted in REEs with only Ce attaining 0.09 wt.% as documented by an electron-probe microanalysis. In contrast to quartzites/quartzitic sandstones, carbonaceous clayey-silty shales and bentonites/tuffites are distinctly enriched in REE-bearing minerals. This diversity is also mirrored in the mean total REE concentrations varying from 204 to 314 mg/kg, in clayey-silty shales and bentonites, attaining 457 mg/kg in some Podwiśniówka shale beds. Results of this and the previous petrographic, mineralogical and geochemical studies have indicated that REE-bearing minerals formed generally along with As-rich pyrite, nacrite/dickite and probably TiO2 polymorphs as a result of multiphase hydrothermal vent activity that took place in the Wiśniówka Late Cambrian sedimentary basin. This evidence is also backed up by the values of LREENASC/HREENASC (1.44–1.75) and Eu/EuNASC (1.24–1.30) coefficients in the clayey-silty shales. This positive Eu anomaly (31.20) points to the formation of REE-bearing minerals in a reducing environment.
    Źródło:
    Geological Quarterly; 2023, 67, 2; art. no. 17
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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