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    Wyświetlanie 1-7 z 7
    Tytuł:
    Strontium isotopes in the Zechstein (Upper Permian) anhydrites of Poland: evidence of varied meteoric contributions to marine brines
    Autorzy:
    Denison, R. E.
    Peryt, T. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059197.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Zechstein
    Late Permian
    anhydrite
    strontium isotopes
    Opis:
    Strontium isotope ratios have been determined on 74 anhydrite samples from seven borehole cores in the Polish Zechstein. Five of the borehole cores are located in the basin and isotope results from these samples show a nearly pure marine signal. Results from one borehole core, located near the Zechstein coastline that migrated through time, record a stronger, in consistent influence of continental strontium to a marine base. Intermittent meteoric influence is recorded in anhydrites from other borehole cores close to the carbonate platform that was emergent during the anhydrite deposition. Consistency of isotope values indicates a marine signal and there is a narrow range in consistent values from 87Sr/86Sr near deltasw –215 (0.70702) for the oldest anhydrites and near deltasw –205 (0.70712) for the youngest an hydrites. Comparison with a sea water 87Sr/86Sr curve based on samples in West Texas and a Permian-Triassic boundary value from China shows that the Polish Zechstein in these seven boreholes is latest Permian in age and major deposition represents a short time interval (~2 million years). Strontium isotope ratios reported by other workers indicate some of the younger Zechstein elsewhere indicate even greater continental influence is in agreement with the interpreted sedimentological set ing for those anhydrites.
    Źródło:
    Geological Quarterly; 2009, 53, 2; 159-166
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strontium isotope composition of Badenian (Middle Miocene) Ca-sulphate deposits in West Ukraine: a preliminary study m
    Autorzy:
    Peryt, T. M.
    Hryniv, S.
    Anczkiewicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059023.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Middle Miocene
    evaporites
    strontium isotopes
    gypsum
    Paratethys
    Opis:
    Strontium isotope compositions have been measured in six primary gypsum samples from the most marginal part of the Badenian evaporite succession in the Ukrainian Carpathian Foredeep Basin (Mamalyha quarry section) and in two anhydrite samples from the basin-centre halite zone of the Ukrainian Carpathian Foredeep, aimed determining the origin of brines from which these sulphates were precipitated. The strontium isotope ratios (87868868761887 6878786
    Źródło:
    Geological Quarterly; 2010, 54, 4; 465-476
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isotopic composition of dolomite associated with Middle Miocene Badenian anhydrites in the Carpathian Foredeep Basin of SE Poland
    Autorzy:
    Jasionowski, M.
    Peryt, T.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059029.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Middle Miocene
    Paratethys
    dolomite
    anhydrite
    carbon and oxygen isotopes
    strontium isotopes
    Opis:
    Dolomite is a quite common, although usually minor, constituent of the Badenian sulphate deposits of the Carpathian Foredeep Basin. In the autochthonous member of the Wola Różaniecka 7 borehole (SE Poland) which contains well preserved, large anhydritic pseudo-morphs after selenitic gypsum, dolomite constitutes up to 75% of the rock volume, the rest being anhydrite. Dolomites mostly show peloidal clotted microfabrics typical of microbialites and are interpreted as products of microbially induced precipitation and/or dolomitisation at temperatures around 40°C (as interpreted from the d18131813
    Źródło:
    Geological Quarterly; 2010, 54, 4; 533-548
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sulphur, oxygen and strontium isotope compositions of Middle Miocene (Badenian) calcium sulphates from the Carpathian Foredeep, Poland: palaeoenvironmental implications
    Autorzy:
    Kasprzyk, A.
    Pueyo, J.J.
    Hałas, S.
    Fuenlabrada, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059523.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Carpathian Foredeep
    Badenian
    sulphur
    oxygen and strontium isotopes
    sulphate deposits
    Opis:
    Sulphur, oxygen and strontium isotope compositions have been measured in sulphate (gypsum and anhydrite) sam ples from the Badenian evaporite complex in the Carpathian Foredeep Basin (Poland) to determine the origin of brines from which these sulphates were formed. Studied samples display the d values from +22.68 to +24.91‰ CDT for sulphur (ten samples) and from +12.26 to +13.63‰ SMOW for oxygen (ten samples), and 87Sr/86Sr ratios from 0.708915 to 0.716329 (six samples). Most samples show isotopic values (both d34S and 87Sr/86Sr) higher than contem poraneous (Badenian) sea water, and thus suggest that these sulphates were formed (i) from brines with a significant component of non-marine waters, (ii) in a restricted system, where an important role was played by meteoric water inputs as well as by bacterial sulphate reduction. The results of this study show clear differences in the isotopic signatures between sedimen tary (gypsum) and diagenetic (anhydrite) lithofacies. While sedimentary gypsum displays sulphur, oxygen and strontium isotope ratios close to contemporaneous (Badenian) sea water, diagenetic anhydrite values are largely elevated. The higher isotopic values (d34S, d18O and 87Sr/86Sr) for anhydrite when compared to gypsum are interpreted as reflecting different hydrological provenances of sulphate in the Badenian basin. Gypsum was formed from brines marine in origin that were subject to an important in flow of continental waters and a local bacterial sulphate reduction in arestricted, and there fore sulphate-limited basin, which is consistent with earlier interpre tations based on sedimentological and geochemical studies. Our study shows that brines from which anhydrite was formed had a highly-radiogenic non-marine (riverine, ground water) strontium component, which is a new contribution to the knowledge on the Badenian sulphate formation. The results reflect a lateral compositional evolution of parent waters during sulphate deposition and diagenesis in the Carpathian Foredeep Basin.
    Źródło:
    Geological Quarterly; 2007, 51, 3; 285-294
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Izotopy strontu jako znaczniki środowiskowe do rozpoznania warunków krążenia wód podziemnych w wielopoziomowych systemach wodonośnych
    Strontium isotopes as environmental tracers for identification of groundwater circulation in multi-layered aquifer systems
    Autorzy:
    Krogulec, E.
    Sawicka, K.
    Zabłocki, S.
    Bełka, Z.
    Zieliński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075380.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    izotopy strontu
    koncentracja strontu
    wielopoziomowe systemy wodonośne
    krążenie wód podziemnych
    mieszanie wód podziemnych
    strontium isotopic ratio 87Sr/86Sr
    strontium concentration
    multi-layered groundwater system
    groundwater circulation
    groundwater mixing
    Opis:
    The results of the research concerning measures of strontium isotopes and concentrations, were presented in this article. This environmental tracers occuring in groundwater and surface water allowed for the preliminary identification of groundwater circulation in the multi-layered aquifer system. The study area concerned Żarnowiecka Upland and Valley of the Żarnowieckie Lake with the Piaoenica river, where the occurrence of 3 to 5 aquifers in Quaternary, Miocene and Oligocene was confirmed. The valley area is also the Main Groundwater Reservoir (MGR) No. 109. The results clearly indicated on substantial differences in the values of 87Sr/86Sr isotopic signatures and strontium concentrations in each of aquifers. These differences made possible to determine the percentage of the groundwater in the Piaoenica drained from the upland and from the valley. Calculations showed the groundwater component from the upland may constitute up to 80% of river water, and the river is a regional drainage base even for the Oligocene aquifer occurring at a depth of approx. 200 m. The results confirmed no link between the shallowest aquifers occurring in the upland, and the drainage role of the Piaśnica river. The characteristic of shallow groundwater is similar to the rainwater.
    Źródło:
    Przegląd Geologiczny; 2015, 63, 10/1; 873--877
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on concentration of some heavy metals and strontium 90Sr and cesium 137Cs isotopes in bottom sediments of selected lakes of Łęczyńsko-Włodawskie Pojezierze
    Autorzy:
    Solecki, J.
    Reszka, M.
    Chibowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/148507.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    strontium
    cesium
    lakes
    sedimentes
    haevy metals
    Opis:
    Research on concentration of radionuclides and heavy metals in bottom sediments of three different lakes is presented. The lakes were located in the vicinity of the National Park in the Lublin (Poland) region. Bottom sediments were collected from various depths. In all studied sediment, sample concentration of 90Sr and 137Cs isotopes ranged from 2.07 11.76 to 5.67 67.7 Bq/kg, respectively. The amount of radioactive 137Cs increased with depth of the lake. The same dependence for 90Sr was not observed. The level of radioactivity originated from natural isotopes was much lower in bottom sediments than that measured in related soils. Most of radioactivity in bottom sediments comes from anthropogenic isotopes.
    Źródło:
    Nukleonika; 2006, 51,suppl.2; 33-37
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon, oxygen and strontium isotope composition of Plattenkalk from the Upper Jurassic Wattendorf Konservat-Lagerstätte (Franconian Alb, Germany)
    Autorzy:
    Blendinger, Wolfgang
    Mäuser, Matthias
    Powiązania:
    https://bibliotekanauki.pl/articles/2060917.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Jurassic
    Plattenkalk
    isotopes
    correlation
    aged seawater
    Jura
    izotopy
    korelacja
    wiek wody morskiej
    Opis:
    The oldest Jurassic (Kimmeridgian) Plattenkalk occurs in Wattendorf on the northern Franconian Alb (southern Germany). It is a 15 m thick alternation of laminated dolomite and limestone, interbedded with carbonate debris layers in a depression ~2 km across and a few tens of metres deeper than the surrounding microbial-sponge reefs. The Plattenkalk overlies a few tens of metres of microbialsponge biostrome facies and bedded, micritic basinal limestone. The bulk-rock stable isotopes of the micritic basinal facies gradually change from normal marine (δ13C ~ +2‰, δ18O ~ –2‰ VPDB) to lower values (δ13C ~ 0‰, δ18O ~ –6‰) in a ~ 40 m thick interval including Plattenkalk and suggest ageing of the bottom waters. The surrounding reefs are isotopically nearly invariant (δ13C ~ +2‰, δ18O ~ –2‰ VPDB). An isotope anomaly (δ13C of > ~ –9‰) is restricted to the basinal facies and is most pronounced in the biostrome facies. This indicates methanogenesis, which is documented in negative δ13C in dedolomite, calcite-cemented dolomite and calcite concretions and occurred probably mainly below seabed. The Konservat-Lagerstätte was probably deposited near an oxygen minimum zone in a water column with low productivity of organic material. Dolomite is in isotopic equilibrium with Plattenkalk and was probably deposited as protodolomite from chemically modified, aged seawater. 87Sr/86Sr ratios of bulk carbonate are often slightly radiogenic, probably due to random analytical sample contamination by clay minerals. Belemnite and some matrix 87Sr/86Sr is slightly lower than that of Kimmeridgian seawater, either caused by basin restriction or by fluids derived from the diagenesis of Oxfordian rocks below. An equivalent Upper Kimmeridgian depression ~23 km distant and a somewhat younger Konservat-Lagerstätte in Poland show a δ13C isotope anomaly below the main fossil beds. Isotopic evidence for saline bottom waters, the current interpretation, is lacking. This study also shows that micritic carbonates can preserve their early diagenetic, marine δ18O signal, which is correlatable over tens of kilometres
    Źródło:
    Volumina Jurassica; 2021, 19, 1; 1--20
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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