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Tytuł:: Zastosowanie metody helowej do datowania i rozpoznania warunków krążenia wód podziemnych w zlewni Gwdy
Application of the helium method to dating and recognition of the groundwater circulation within the Gwda River catchment area
Autorzy:: Kotowski, T.
Najman, J.
Powiązania:: https://bibliotekanauki.pl/articles/2075389.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: datowanie
cyrkulacja wody podziemnej
hel
chromatografia gazowa
dating
groundwater circulation
Helium
gas chromatography
Opis:: <4He measurements for groundwater dating and recognition of the groundwater circulation purposes can be replaced by alternative total He (3He +< sup>4He) concentration measurements because the content of 3He can be ignored in most cases. In this study the total He concentrations in groundwater were determined using the GC (gas chromatographic) method. To study the variability of He concentrations, a profile of ca. 65 km in length was employed. He concentrations are low compared to the analogous values determined for similar aquifer systems. Variability of He concentrations is also low in the study area. He concentrations determined have made it possible to estimate the residence time of groundwater in Cenozoic aquifers, which is ca. 3,000 years. Taking the mutually noted observations into account, this indicates relatively rapid groundwater flow and a strong hydraulic connection between the aquifers within the study area.
Źródło:: Przegląd Geologiczny; 2015, 63, 10/1; 840--845
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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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

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