Resumé
Kilen, Kronprins Christian Land, contains the thickest and
stratigraphically most complete Jurassic and Cretaceous sediment
succession in North Greenland. This study revises and formalises the
lithostratigraphic framework of these deposits. The work is based on
recent extensive stratigraphic field work supplemented by
photogeological mapping and biostratigraphic studies, and builds on the
earlier stratigraphic work conducted mainly in the 1980s and 1990s.
According to the new stratigraphic scheme, the more than 500 m thick
Jurassic succession is divided into four formations. The poorly dated
Gletscherport Formation comprises lagoonal heterolithic sandstones. The
Mågensfjeld and Birkelund Fjeld Formations consist of shallow marine
fine-grained sandstones of Bajocian–Bathonian and Kimmeridgian age,
respectively. The Kuglelejet Formation comprises mainly shallow marine
sandy mudstone and sandstone of Volgian age and includes the
mudstone-dominated Splitbæk Member. The Lower Cretaceous interval is
estimated to be more than 1500 m thick and is divided into three
formations. The Dromledome Formation comprises deep shelf to offshore
transition, black mudstones of late Ryazanian to Hauterivian age. It is
erosively overlain by unfossiliferous, fluvial and estuarine sandstones
of the Lichenryg Formation. The overlying, late Aptian to middle
Cenomanian Galadriel Fjeld Formation comprises six members, of which the
Tågekyst and Kangoq Ryg Members occur in the Gåseslette area, whereas
the Pil, Valmue, Stenbræk and Hondal Members occur in the Kilen Fjelde
area. The Galadriel Fjeld Formation is characterised by interbedded
mudstones and sandstones from offshore–shoreface environments. The 650 m
thick Upper Cretaceous succession is assigned to the Sølverbæk
Formation, which is undivided in the Gåseslette area and divided into
the Skalbæk and Scaphitesnæse Members in the Kilen Fjelde area. The
Sølverbæk Formation is dominated by marine mudstones and
sandstonemudstone heteroliths of late Cenomanian to Santonian age. The
new lithostratigraphic framework and significant biostratigraphic
advances allow a closer correlation of the Mesozoic units between North
Greenland and other Arctic basins.
Originalsprog | Engelsk |
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Sider (fra-til) | 61–112 |
Antal sider | 52 |
Tidsskrift | Bulletin of the Geological Society of Denmark |
Vol/bind | 66 |
DOI | |
Status | Udgivet - 2018 |
Programområde
- Programområde 3: Energiressourcer