- Tytuł:
-
O badaniach izotopowych diagenetycznego illitu z piaskowców czerwonego spągowca Wielkopolski i Pomorza Zachodniego
Isotopic investigations of diagenetic illite of Rotliegend sandstones from the Wielkopolska and Western Pomerania regions - Autorzy:
-
Maliszewska, A.
Kuberska, M. - Powiązania:
- https://bibliotekanauki.pl/articles/2074690.pdf
- Data publikacji:
- 2009
- Wydawca:
- Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
- Tematy:
-
diagenetyczny illit
wiek K-Ar
wody porowe
piaskowce
czerwony spągowiec
diagenetic illite
K-Ar age
pore waters
sandstones
Rotliegend - Opis:
- Diagenetic illite tends to crystallize most often as fibres and it forms net-like textures reducing filtration abilities of sandstones. Rocks containing this type of illite show a very low permeability or may even be impermeable. K-Ar datings of crystallization of these fibres define the time when permeability was reduced and duration of the post-depositional period when the deposits were permeable for pore fluids, including gaseous and liquid hydrocarbons. Clay fractions <0.2 ěm and <0.3 ěm were isolated from 12 samples of the Rotliegend sandstones fromWestern Poland in order to define the K-Ar age of illite. The results of investigations show that this age from the fraction <0.2 ěm falls between 187.1 and 113.6Ma (tab. 1), that covers a long period since early Jurassic to late Cretaceous. The determination of 18O in illite (15.1–15.9‰SMOW), performed in East Kilbride laboratory, and calculations of hypothetic temperatures of illite crystallization (125–173°C) show that it crystallized from pore waters of marine origin and with 18O values ranging from 4.3 to 7.5‰ SMOW, which probably infiltrated from evaporitic Zechstein deposits.
- Źródło:
-
Przegląd Geologiczny; 2009, 57, 4; 322-332
0033-2151 - Pojawia się w:
- Przegląd Geologiczny
- Dostawca treści:
- Biblioteka Nauki
Artykuł