Sequence correlation: Upper Triassic to Lower Jurassic succession, Canadian and Norwegian Arctic

Abstract

Norian-Pliensbachian clastic strata are widespread in both the Canadian Arctic Islands and the Barents Sea-Svalbard region. In the Sverdrup Basin of Arctic Canada the stratigraphy of the succession is well established through a combination of surface and subsurface sections. In the Barents Sea region the stratigraphy of the succession is less well known because data are available only from restricted areas. Application of the principles of sequence stratigraphy to the succession in the Sverdrup Basin reveals that the number of recognizable sequences varies over the basin. This reflects marked lateral differences in sedimentation and subsidence rates. In the Barents Sea-Svalbard region only three or less sequences are recognized in the Norian-Pliensbachian succession of known areas due to subsidence and sedimentation effects. The general palaeogeography of the Canadian-Norwegian Arctic for the Norian-Sinemurian interval was marked by centres of high sediment influx separated by semi-starved platforms. Sediment influx over the entire region waned in Pliensbachian time. -from Authors