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    Wyświetlanie 1-6 z 6
    Tytuł:
    Trace element geochemistry of the Early to Late Cretaceous deposits of the Grajcarek thrust-sheets - a palaeoenvironmental approach (Małe Pieniny Mts., Pieniny Klippen Belt, Poland)
    Autorzy:
    Wójcik-Tabol, P.
    Oszczypko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058965.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Western Carpathians
    Grajcarek thrust-sheets
    black flysch
    trace elements geochemistry
    Opis:
    The chemical composition of the Cretaceous deposits of the Grajcarek thrust-sheets (Pieniny Klippen Belt, Poland) has been investigated to provide information on palaeoenvironment and provenance of pelagic and turbiditic particles. The material studied shows large variations in terrigenous and biogenic content. Phyllosilicates (mirrored in amounts of Al2O3, average 15 wt.%) and carbonates (6 wt.% of CaO) are common mineral components of the deposits excluding the Cenomanian radiolarian shales (CRS) that are enriched in silica "Immobile" elements may be accommodated by phyllosilicates and accessory minerals (i.e. zircon, xenotime, apatite and Ti-oxides). Heavy minerals are significant within the Szlachtowa Fm. High field strength elements (HFSE) in the Malinowa Fm. are housed in secondary apatite and Fe-oxides. Lithophile trace elements (LILE) concentrations in the material studied are lower/comparable to Post-Archean Australian Shale (PAAS). Ba concentration in the CRS probably reflects enhanced bioproductivity. Interaction between major oxides, distributions of "immobile' and lithophile elements suggest that variation in trace elements through the succession was mainly controlled by the terrigenous input. The material studied was sourced from intermediate to felsic rocks of the Czorsztyn (Oravic) Ridge. The Szlachtowa Fm. and CRS are more mature than others due to low contents of clay minerals. The Szlachtowa Fm. also contains recycled material. The CRS correspond to the oceanic anoxic event 2 (OAE 2) whereas the "Black Flysch" of the Szlachtowa and Opaleniec formations may be related to the Early Cretaceous OAE 1
    Źródło:
    Geological Quarterly; 2012, 56, 1; 169-186
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemistry of trace elements in spring waters of the Lourdes area (France)
    Autorzy:
    Dobrzyński, D.
    Rossi, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/191889.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    groundwater geochemistry
    trace elements
    spring water
    Lourdes springs
    France
    Opis:
    Geochemical studies on the waters of four springs, including the Massabielle (MS) Spring, were carried out at Lourdes (France) following a long, rainless and warm period, with the aim of at least documenting the groundwater chemistry that was affected by the current meteoric input. The existence of anecdotal reports about anomalously elevated concentrations of trace constituents in the water of the MS Spring in the absence of any detailed studies inspired these first geochemical investigations of trace elements in the spring waters at Lourdes. The main common features of waters from the four springs studied in Lourdes are low total dissolved solids (255–318 mg/L), a slightly alkaline pH (7.50–7.68), oxidizing conditions (EH = 458–472 mV), similar temperatures (11.3–13.1 °C), and their Ca-HCO3 hydrochemical type, all of which are typical characteristics for an active zone within a hydrogeological system that is developed in carbonate-dominated bedrock. The spring waters, which represent an active turnover zone in the hydrogeological system, are only in partial chemical equilibrium with the minerals of the aquifer rocks. The enrichment of the MS Spring water with numerous elements (Li, Na, Cs, Ba, S, F, Br, REE, B, Sb and Bi), when compared with other springs studied and with the bedrock geochemistry, probably is caused by contributions from fluids (originating from the Pyrenees basement and/or from Triassic saliferous deposits) in the formation of the hydrogeochemical content of the zone under investigation. The germanium concentration in all of the waters studied was significantly lower than the concentrations typically found in fresh groundwater in the active zone; accordingly, the hypothesis concerning an anomalously high concentration of this element in the MS Spring water was invalidated. The preliminary geochemical research presented is part of an interdisciplinary geochemical-biological-tensiometric study of the spring waters at Lourdes.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2017, 87, 2; 199-212
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of the Ahmadabad hematite/barite deposit, Iran – studies of mineralogy, geochemistry and fluid inclusions
    Autorzy:
    Babaei, A. H.
    Ganji, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/94546.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    geochemistry
    trace elements
    rare earth elements
    Semnan
    geochemia
    pierwiastki śladowe
    pierwiastki ziem rzadkich
    REE
    Opis:
    The Ahmadabad hematite/barite deposit is located to the northeast of the city of Semnan, Iran. Geostructurally, this deposit lies between the Alborz and the Central Iran zones in the Semnan Subzone. Hematite-barite mineralisation occurs in the form of a vein along a local fault within Eocene volcanic host rocks. The Ahmadabad deposit has a simple mineralogy, of which hematite and barite are the main constituents, followed by pyrite and Fe-oxyhydroxides such as limonite and goethite. Based on textural relationships between the above-mentioned principal minerals, it could be deduced that there are three hydrothermal mineralisation stages in which pyrite, hematite and barite with primary open space filling textures formed under different hydrothermal conditions. Subsequently, in the supergene stage, goethite and limonite minerals with secondary replacement textures formed under oxidation surficial conditions. Microthermometric studies on barite samples show that homogenisation temperatures (TH) for primary fluid inclusions range from 142 to 256°C with a temperature peak between 200 and 220°C. Salinities vary from 3.62 to 16.70 NaCl wt% with two different peaks, including one of 6 to 8 NaCl wt% and another of 12 to 14 NaCl wt%. This indicates that two different hydrothermal waters, including basinal and sea waters, could have been involved in barite mineralisation. The geochemistry of the major and trace elements in the samples studied indicate a hydrothermal origin for hematite and barite mineralisation. Moreover, the Fe/Mn ratio (>10) and plots of hematite samples of Ahmadabad ores on Al-Fe-Mn, Fe-Mn-(Ni+Co+ Cu)×10, Fe-Mn-SiX2 and MnO/TiO2 – Fe2O3/TiO2 diagrams indicate that hematite mineralisation in the Ahmadabad deposit occurred under hydrothermal conditions. Furthermore, Ba and Sr enrichment, along with Pb, Zn, Hg, Cu and Sb depletion, in the barite samples of Ahmadabad ores are indicative of a low temperature hydrothermal origin for the deposit. A comparison of the ratios of LaN/YbN, CeN/YbN, TbN/LaN, SmN/NdN and parameters of Ce/Ce* and La/La* anomalies of the hematite, barite, host volcanic rocks and quartz latite samples to each other elucidate two important points: 1) the barite could have originated from volcanic host rocks, 2) the hematite could have originated from a quartz latite lithological unit. The chondrite normalised REE patterns of samples of hematite barite, volcanic host rocks and quartz latite imply that two different hydrothermal fluids could be proposed for hematite and barite mineralisation. The comparison between chondrite normalised REE patterns of Ahmadabad barite with oceanic origin barite and low temperature hydrothermal barite shows close similarities to the low temperature hydrothermal barite deposits.
    Źródło:
    Geologos; 2018, 24, 1; 55-68
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of possible application of geochemistry to distinguish limnic and paralic coal-bearing parts of the carboniferous in the Upper Silesian Coal Basin
    Ocena możliwości zastosowania badań geochemicznych do identyfikacji limnicznych i paralicznych warstw karbonu produktywnego Górnośląskiego Zagłębia Węglowego
    Autorzy:
    Kokowska-Pawłowska, M.
    Krzeszowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/219320.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    geochemia
    korelacja stratygraficzna
    wskaźniki geochemiczne
    pierwiastki śladowe
    geochemistry
    stratigraphic correlation
    geochemical ratios
    trace elements
    Opis:
    The paper presents the results of geochemical analyses of samples from the Poruba Beds of the paralic series and from the Zaleskie Beds of the limnic series Upper Silesian Coal Basin (USCB). The contents of the following trace elements and oxides were evaluated using spectrometric method: Cr, Th, U, V, AL2O3, MgO, K2O, P2O5. The following indicators, most commonly used in chemostratigraphy and in the identification of the marine and non-marine sediments ratios, were analyzed: U, Th, Th/U, K2O, Th/K2O, P2O5, Al2O3, P2O5/ Al2O3, V, Cr, V/Cr, and (K2O/Al2O3) / (MgO/Al2O3). The research showed that those ratios may be used to identify sedimentary environments and geochemical correlations of the sedimentary rock sequences in the USCB. Geochemical ratios discussed in the paper allowed distinguishing two populations of samples representing paralic and limnic series.
    W artykule zaprezentowano wyniki badań geochemicznych próbek z warstw Porębskich z serii paralicznej i z warstw Załęskich z serii limnicznej Górnośląskiego Zagłębia Węglowego (GZW). Metodą spektrometryczną oznaczono zawartość następujących pierwiastków śladowych i tlenków: Cr, Th, U, V, AL2O3, MgO, K2O, P2O5. Analizowano najczęściej stosowane, w chemostratygrafii i identyfikacji osadów morskich i niemorskich, wskaźniki: U, Th, Th/U, K2O, Th/K2O, P2O5, Al2O3, P2O5/Al2O3, V, Cr, V/Cr, (K2O/Al2O3) / (MgO/Al2O3). Badania wykazały, że wskaźniki te z powodzeniem mogą być stosowane do identyfikacji środowisk sedymentacyjnych i korelacji sekwencji skał osadowych w GZW. Geochemiczne wskaźniki zastosowane w pracy pozwoliły wyróżnić dwie populacje próbek reprezentujących serię paraliczną i limniczną.
    Źródło:
    Archives of Mining Sciences; 2017, 62, 4; 717-730
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemical relationships in CO2-rich therapeutic waters of the Sudetes (Poland)
    Autorzy:
    Dobrzyński, Dariusz
    Stępień, Marcin
    Szostakiewicz-Hołownia, Marzena
    Humnicki, Włodzimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/24024704.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    groundwater geochemistry
    trace elements
    therapeutic water
    CO2-rich water
    Sudetes
    hydrogeochemia
    pierwiastki śladowe
    wody lecznicze
    szczawy
    Sudety
    Opis:
    Geochemical studies of CO2-rich therapeutic waters in the Sudetes have provided new data on a wide range of trace elements, going beyond standard chemical analyses of such waters. A consistent set of physicochemical data obtained using the same analytical methods was subjected to statistical analyses, including hierarchical clustering, factor analysis and nonparametric tests (Kruskal-Wallis, Tau Kendall), to reveal geochemical relationships between physicochemical and chemical parameters in the waters, and their relationships with the aquifer lithology. Distinct differences in the composition of waters found in crystalline rocks (mainly gneisses and mica schists) and sedimentary rocks were identified. The wide range of elements can be associated with the hydrolysis of silicate minerals, including alkali and alkali earth metals (Li, Na, K, Rb, Cs, Be) and (mostly) transition elements (Fe, Mn, Zn, Co, W, Mg). Carbonate equilibria are the next important factor as it determines the aggressiveness of the water towards the minerals of aquifer rocks and affects the concentrations of numerous solutes. The probable common origin of chlorides, bromides and sulphates together with Li, Na, Sr may be related to the relict saline component of deep circulating waters, a hypothesis that requires further investigations.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 4; 479--493
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemia pierwiastków śladowych w popiele lotnym pochodzącym z elektrowni opalanych węglem brunatnym
    Geochemistry of trace elements in fly ashes from lignite fired power stations
    Autorzy:
    Dolnickova, D.
    Drozdova, J.
    Raclavsky, K.
    Juchelkova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/318261.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    popiół lotny
    pierwiastki śladowe
    węgiel brunatny
    geochemia
    korelacja
    stopień wzbogacenia
    fly ash
    trace elements
    lignite
    geochemistry
    correlation
    relative enrichment factor
    Opis:
    Celem niniejszego artykułu jest omówienie zachowania się pierwiastków śladowych w popiele lotnym otrzymanym z ośmiu elektrowni, które wykorzystują węgiel brunatny i stosują kotły tego samego typu. Zachowanie się pierwiastków śladowych w popiele lotnym zostało określone metodą spektroskopii fluorescencji rentgenowskiej. Przeprowadzono dwie analizy w każdym roku, a średnia tych dwóch wartości została wykorzystana do oszacowania zmian zawartości pierwiastków śladowych w popiele lotnym w czasie. Wartości współczynnika korelacji obliczono w odniesieniu do średnich dla poszczególnych elektrowni.
    The aim of this article is to discuss the behaviour of trace elements in fly ashes obtained from eight power plants which utilize lignite in boilers of the same type. Behaviour of trace elements in fly ashes was studied by means of X-ray fluorescence spectroscopy. Two analyses were performed per year, and median of these two values was used for evaluation of changes in the time series of trace element concentrations in fly ashes. The values of correlation coefficient were calculated from corresponding medians for individual power plants.
    Źródło:
    Inżynieria Mineralna; 2012, R. 13, nr 1, 1; 59-68
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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