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    Wyświetlanie 1-6 z 6
    Tytuł:
    Cosmogenic and radiogenic noble gases in the Sołtmany L6 chondrite
    Autorzy:
    Łuszczek, K.
    Dalcher, N.
    Leya, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1202498.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    noble gas
    cosmic-ray exposure age
    preatmospheric radius
    gas retention age
    Opis:
    We measured the concentrations and isotopic compositions of He, Ne, Ar, Kr, and Xe in a 60.36 mg sample of the Sołtmany meteorite (L6), which fell in northeastern Poland in 2011. The Kr and Xe data suggest a mixture of atmospheric contamination and Q. Using cosmogenic 21Ne and 38Ar concentrations, Sołtmany’s cosmic-ray exposure (CRE) age was determined to be ~29.2 Ma. The preatmospheric radius for Sołtmany was equal to or less than approximately 15 cm and the sample studied here most likely came from close to the preatmospheric surface of the meteoroid. While the 40Ar gas retention age is about 4137 Ma, the 4He gas retention age is 1610 Ma, suggesting loss of a major 4He fraction likely during an impact and/or degassing event on the Sołtmany parent body prior to the ejection of the Sołtmany meteorite ~29.2 Ma ago.
    Źródło:
    Meteorites; 2012, 2, No. 1-2; 39-43
    2299-0313
    2299-1220
    Pojawia się w:
    Meteorites
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skład gazów rozpuszczonych w wodzie termalnej eksploatowanej odwiertem KT-1 w Karpnikach na obszarze granitu karkonoskiego w Sudetach
    Composition of gas dissolved in thermal water extracted from borehole BKT-1 at Karpniki (Karkonosze granite area, Sudetes)
    Autorzy:
    Przylibski, T. A.
    Żak, S.
    Kowalska, A.
    Domin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075848.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    skład gazu
    gaz szlachetny
    azot
    hel
    argon
    radon
    gas composition
    noble gas
    nitrogen
    helium
    Opis:
    The detailed research of a gas mixture released from the thermal water, which is extracted from borehole KT-1 at Karpniki, showed the predominance of nitrogen (98.08% by volume) with subordinate Ar (1.52%) and He (0.32%) and trace amounts of CO2 (0.07%) and CH4 (0.01%). The 222Rn radionuclide is also dissolved in this water, showing an activity concentration of 245 Bq/dm3 at the outflow and 256 Bq/dm3 in the aquifer. A small value of the gas exponent (0.014), and also a value of the δ coefficient close to 1 (0.93) were calculated based on the dissolved Ar and N2 content in the water examined, as well as on concentrations of argon and nitrogen in water, assuming that atmospheric air is present above the water surface with a contemporary composition and under normal pressure. The data obtained indicate that these gases and additionally CO2 and CH4 are of atmospheric origin. These gases were either dissolved in rainwater, which infiltrated deep into the Karkonosze granite massif, orformed within the organic layer covering this exposed intrusion. This is evidenced by concentrations of these gases that can be comparable to their atmospheric equivalents. Helium is a radiogenic gas formed as a result of nuclear transformation of isotopes assigned to natural radioactive series. The radiogenic and also radioactive gas is represented by the 222Rn radioisotope which is released from reservoir rocks, in an amount of 5% of the atom poolforming in the reservoir rock, into thermal water that subsequently reaches borehole KT-1 from a distance of 34 m at most. The thermal paleoinfiltration water has been heated up as a result of the conduction, and the source of heat is the temperature of the rocks resulting from an average geothermal gradient of 2.96°C per 100 m. The results of the authors’research indicate that there are no traces of inflow of hotfluids (especially water) from the deeper layers of the crust or from the mantle. If the examined thermal water is considered as paleoinfiltration water, its static resources may be limited, non-renewable.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 8; 483--494
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chondryt Sołtmany
    Sołtmany chondrite
    Autorzy:
    Przylibski, Tadeusz A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033061.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Gefion family
    L6
    asteroid
    atomic weight
    bulk chemistry
    cosmic-ray exposure age
    cosmogenic radionuclides
    density
    fusion crust
    magnetic susceptibility
    meteorite
    meteorite age
    meteorite fall
    mössbauer spectroscopy
    noble gas
    ordinary chondrite
    organic matter
    parent body
    porosity
    primordial radionuclides
    thermophysical properties
    troilite thermometer
    Opis:
    The Sołtmany hammer meteorite is classified as an ordinary chondrite type L6, W0, S2. At present it is the most thoroughly and comprehensively examined Polish meteorite. A comprehensive petrological, mineralogical and geochemical analysis alongside the investigation of its physical and particularly thermophysical properties, and, most of all, analyses of cosmogenic radionuclides and noble gases isotopes content, as well as the use of a troilite thermometer has made it possible to draw interesting conclusions concerning the genesis and evolution of the parent body and the history of the parent meteoroid and, finally, the Sołtmany meteorite. The present report attempts at summing up the results of studies conducted at several European research centres in the last four years. The age of the the Sołtmany chondrite parent rock has been defined at 4.137 billion years. It was formed at a temperature of up to 440–450 K (about 170°C), probably at a depth of up to 3 to 7 km under the surface of the parent body, i.e. at a pressure of the order of 1–2.4 kbar. Such a low temperature during the accretion, diagenesis and metamorphism of the parent body may point to its complicated development, which may be in part due to collisions of partially melted planetesimals. Like with other type L ordinary chondrites, one can infer that the parent body could have been destroyed about 467 million years ago, at the time of a catastrophic collision which led to the formation of Gefion family of planetoids. Perhaps one of the bodies in this family was involved in another collision about 29.2 million years ago, which resulted in ejecting the parent meteoroid of the Sołtmany chondrite onto the Earth collision trajectory. Before entering the Earth’s atmosphere, this meteoroid had the mass of about 36 kg and the diameter of ca 13.5 cm. During its flight through the atmosphere, it rotated and somersaulted, which resulted in the formation of an uniform thin (0.5–0.7 mm) fusion crust, whose temperature reached 1000°C. In the last phase, the Sołtmany meteorite fell almost vertically and its mass was a mere 3% of the mass of the parent meteoroid – 1.066 kg. It hit the roof and then the concrete stairs of a farm building, which caused it to break into two bigger and many small pieces. It was found a few minutes after the fall, which occurred at 6:03 a.m. (CEST, UTC+2:00) on 30 April 2011, by Wydmińskie Lake in northern Poland (54°00,53’N, 22°00,30’E). The Sołtmany chondrite is one of just 14 meteorites in which the activity concentration of the cosmogenic 52Mn has been determined, and one of the few ordinary chondrites where the concentration of organic matter has been defined. As a result, it was found out that unlike in carbonaceous CI chondrites, the composition of organic particles is dominated by less complex compounds (CHO and CHOS) than CHNO and CHNOS compounds. This may indicate the decomposition of more complex organic compounds into particles with simple structures during magmatic and metamorphic processes related to formation of type L ordinary chondrites.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2016, 7; 93-122
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metody GC/TCD oznaczania He, Ne i Ar w wodach podziemnych do oceny ich wieku, na przykładzie wód z rejonu Buska-Zdroju
    Application of GC/TCD method of He, Ne and Ar analysis in groundwater dating, using groundwater from Busko-Zdrój region as an example
    Autorzy:
    Najman, J.
    Kotowski, T.
    Kasela, T.
    Bielewski, J.
    Śliwka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075590.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    chromatografia gazowa
    gazy szlachetne
    datowanie wód podziemnych
    gas chromatography
    noble gases
    groundwater dating
    Opis:
    The paper presents the method of chromatographic determination of noble gases concentrations (He, Ne and Ar) in groundwater. He concentration in groundwater is helpful in groundwater dating over a wide range of time. Ne and Ar concentrations are used to calculate excess air and recharge temperature of groundwater. Sulphide waters occurring in Cenomanian sediments in the southern part of the Miechów Trough in Busko-Zdrój, Krzyż and Kazimierza Wielka areas are the subject of research. The results of the noble gases concentrations measurements for boreholes: Busko C-1, Cudzynowice GT-1 and Wełecz S-6 are presented as well as the methodology of calculating concentrations of these gases and groundwater ages.
    Źródło:
    Przegląd Geologiczny; 2017, 65, 11/1; 1130--1133
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noble gases in Baszkówka and Mt. Tazerzait
    Autorzy:
    Scherer, P.
    Schultz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059313.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Baszkówka
    Tazerzait Mountains
    meteorites
    noble gases
    cosmic-ray exposure age
    gas retention ages
    Opis:
    Concentration and isotopic composition of noble gases have been measured in bulk samples of the L5 chondrites Baszkówka and Mt. Tazerzait. Compared to other chondrites both meteorites have very large cosmic-ray exposure ages of 74 and 60 million years, respectively. During their history both meteorites were not involved in major thermal events.
    Źródło:
    Geological Quarterly; 2001, 45, 3; 313-314
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metody analityczne stosowane w ocenie odporności systemów hydrogeologicznych na zanieczyszczenia antropogeniczne
    The analytical methods used in examining resistance of hydrogeological systems to anthropogenic pollution
    Autorzy:
    Najman, J.
    Kotowski, T.
    Bielewski, J.
    Śliwka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075438.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    datowanie wód podziemnych
    gazy szlachetne
    znaczniki antropogeniczne
    metoda chromatografii gazowej
    groundwater dating
    noble gases
    anthropogenic tracers
    gas chromatographic method
    Opis:
    In this study the method for evaluating resistance hydrogeological systems to anthropogenic pollution using environmental tracers is described. Resistance of groundwater systems to anthropogenic pollution is correlated with the age of water, which can be determined by means of environmental tracers. The paper presents modified chromatographic measurement system which allow for the determination of CFC-11, CFC-12, SF6, Ne, Ar and He. Developed chromatographic system can be used to dating young groundwaters, and the helium method allows for the determination of groundwater age in the range from Holocene to the last interglacial. The developed measurement system of argon and neon in water allows to determine recharge temperature and the amount of "excess air" in groundwater. During the work implementation authors took part in a research project organized by the Université Paris-Sud and Université Rennes, France: Gdat1 intercomparison exercice. This exercise aimed to sampling groundwater from boreholes from the area of Paris (along with 31 laboratories from 14 countries) and test, upon them, developed at IFJ PAN analytical methods measuring CFCs, SF6 and noble gases in groundwater
    Źródło:
    Przegląd Geologiczny; 2015, 63, 10/2; 967--971
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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