Early Cretaceous K-Ar age of a large basalt olistolith at Biała Woda, Pieniny Klippen Belt, West Carpathians, Poland

• Autorzy: Birkenmajer K. , Pécskay Z.

Warianty tytułu

PL

Dolnokredowy wiek radiometryczny (K-Ar) olistolitu bazaltowego w Białej Wodzie, pieniński pas skałkowy

• Języki publikacji: EN

Abstrakty

EN

K-Ar dating of a large basalt olistolith, part of the Upper Cretaceous Jarmuta Formation conglomerate, at Biała Woda, Pieniny Klippen Belt (Western Carpathians), yielded two K-Ar ages: 110.6 ą 4.2 Ma and 120.3 ą 4.5 Ma, from columnar-jointed, and platy-jointed parts of the basalt, respectively. The age difference between these dates might reflect two successive Early Cretaceous volcanic events: (i) platy-jointed basalt being an older event, and (ii) columnar-jointed basalt being a younger one. The basaltic rock discussed was long believed to represent a Miocene intrusion in the Upper Cretaceous Jarmuta Formation conglomerates. The first radiometric dating (1987) of the basalt yielded a K-Ar age of 140 ą 8 Ma (Jurassic-Cretaceous boundary). The present dating refines the age of the basalt at Early Cretaceous (Aptian-Albian), thus confirming its position as an olistolith in the Upper Cretaceous conglomerates of the Pieniny Klippen Belt.

Słowa kluczowe

EN

Carpathians; Pieniny Klippen Belt

• Wydawca: Instytut Nauk Geologicznych PAN
• Czasopismo: Studia Geologica Polonica
• Rocznik: 2000
• Tom: Vol. 117
• Strony: 27--35

Twórcy

autor

Birkenmajer K.

autor

Pécskay Z.

• Institute of Geological Sciences, Polish Academy of Sciences, Cracow Research Centre, ul. Senacka 1, 31-002 Kraków, Poland,