Source rock geo chem is try, pe trog ra phy of res er voir ho ri zons and or i gin of nat u ral gas in the De vo nian of the Lublin and Lviv bas ins (SE Po land and west ern Ukraine).
Zircon grains from nine erratic pebbles of granite, granodiorite–tonalite and quartzite from the Polonez Cove Formation (southern King George Island) were studied for their U–Pb isotope ages and provenance. The calculated concordia ages of the studied pebbles are 108.79 ± 0.89, 119.7 ± 2.2, 178.6 ± 2.8, 180.7 ± 1.9, 207.4 ± 3.1, 231.1 ± 1.9, 1087.5 ± 4 and 1833 ± 4 Ma. The source area of individual pebbles was analysed and defined. Pebbles of crystalline rocks were derived from the Antarctic Peninsula, as well as from the Antarctic mainland. The erratic made of quartzite was eroded from the southernmost part of the Ellsworth Mountains (Linder Peak Member of Howard Nunatak Formation). Our isotope data analytically support the earlier thesis that the Oligocene ice-sheet covered a substantial part of Antarctica and its nucleus was located in its central part.
Supplementary material: The U–Pb isotope data (Table S1) are available at https://doi.org/10.6084/m9.figshare.c.5233335
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.