- Tytuł:
- Nd and Sr isotopic evidence for provenance of clastic material of the Upper Triassic rocks of Silesia, Poland
- Autorzy:
-
Konieczna, N.
Belka, Z.
Dopieralska, J. - Powiązania:
- https://bibliotekanauki.pl/articles/191300.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polskie Towarzystwo Geologiczne
- Tematy:
-
Nd isotopes
Sr isotopes
clastics
provenance
Upper Triassic
Polska - Opis:
- Nd and Sr isotope data were used to characterize the sources of the Upper Triassic (Keuper) siliciclastic rocks of Silesia in southern Poland. This continental succession, consisting predominantly of fine-grained mud- stones and siltstones, yields a remarkably uniform Nd isotopic composition. Nd model ages T2DM vary from 1.56 to 1.69 Ga and εNd values are in the range from –8.9 to –11.2, documenting old crust contribution in the provenance. In contrast, the Sr isotopic composition (87Sr/86Sr) of the clastics exhibits a relatively large variation from 0.710 to 0.723. The isotopic compositions indicate that the southern part of the Germanic Basin in Silesia was supplied with clastic material from the Bohemian Massif. The axis of the drainage area must have crossed from SW to NE the Saxothuringian units of the East Sudetes and most probably also the area of the Tepla–Barrandian Unit. There is no indication of any sediment transport from the Moravo-Silesian Belt and the Fore-Sudetic Block. It seems, that the Palaeozoic rocks of the latter domain must have been buried completely during Late Triassic times.
- Źródło:
-
Annales Societatis Geologorum Poloniae; 2015, 85, 4; 675-684
0208-9068 - Pojawia się w:
- Annales Societatis Geologorum Poloniae
- Dostawca treści:
- Biblioteka Nauki
Artykuł