Cretaceous lithostratigraphy of North-East Greenland

作者：Morten Bjerager, Peter Alsen, Jørgen A. Bojesen‐Koefoed, Michael B.W. Fyhn, Jussi Hovikoski, Jon R. Ineson, Henrik Nøhr‐Hansen, Lars Henrik Nielsen, Stefan Piasecki, Henrik Vosgerau · 发表于：Bulletin of the Geological Society of Denmark · 年份：2020 · DOI：10.37570/bgsd-2020-68-04 · 被引用次数：25 · 研究领域：Geological Studies and Exploration、Hydrocarbon exploration and reservoir analysis、Geological and Geophysical Studies

An updated and revised lithostratigraphic scheme is presented for the Cretaceous of North-East Greenland from Traill Ø in the south to Store Koldewey in the north. The Ryazanian to lower Maastrichtian succession is up to several kilometres thick and comprises four groups, 12 formations and 18 members. The groups record the tectonic evolution of the East Greenland depocentre on the western flank of the evolving proto-Atlantic seaway. The Wollaston Forland Group encompasses the uppermost Jurassic – lowermost Cretaceous rift-climax succession and contains the Lindemans Bugt and Palnatokes Bjerg Formations; two new members of the latter formation are erected from Store Koldewey. Post-rift Cretaceous strata are referred to the new Brorson Halvø Group and the Home Forland Group. The Brorson Halvø Group (uppermost Hauterivian – middle Albian) is dominated by slope and basinal mudstones of the new Stratumbjerg Formation but also includes fluvio-deltaic and shallow marine sandstones of the revised Steensby Bjerg Formation on northern Hold with Hope and submarine slope apron breccias and conglomerates of the revised Rold Bjerge Formation on Traill Ø. The Home Forland Group covers the middle Albian – Coniacian succession. The basal unconformity records an important mid-Albian tectonic event involving intrabasinal uplift, tilting and erosion, as exemplified by the middle Albian conglomerates of the new Kontaktravine Formation on Clavering Ø. The Home Forland Group is dominated regionally...