UNIQUE LATE PERMIAN–EARLIEST TRIASSIC HIGH-RESOLUTION ORGANIC CARBON ISOTOPE AND PALYNOFACIES RECORDS FROM EAST GREENLAND

The deltaic marine record from Kap Stosch in East Greenland represents one of the thickest siliciclastic sequence of Late Permian–earliest Triassic age. About 700 meters of section have been sampled at high-resolution to produce records of bulk organic carbon isotope (δ¹³C_org) and palynofacies spanning the Late Permian to early-mid Dienerian interval. This study is focused on the identification of regional and global signals within the Kap Stosch record. The combination of bulk organic carbon isotope and palynofacies data shows the influence of the origin of organic matter and the depositional environment on δ¹³C_org values. Based on palynofacies and sedimentological evidence three transgressive-regressive cycles can be identified, which can be correlated to sequence stratigraphy of Arctic Canada and the Barents Shelf. Correlation of the Kap Stosch record with other carbon isotope records (East Greenland, Norway, Arctic Canada, China, and Arabic Peninsula) allows the identification of two major global shifts. First, the negative carbon isotope shift recorded on a global scale prior to the Permian–Triassic boundary, and second, the negative shift at the Griesbachian–Dienerian boundary. The correlation with the Trøndelag Platform, offshore Norway, shows regional carbon isotope signals that are probably linked to increased tectonic activity of the basin during the Griesbachian.