Abstract
The aims of the present study were: to interpret precisely the depositional environment of the coarsegrained, cross-bedded sandstones of the Raukelv Formation (Lower Volgian - Valanginian) of Jameson Land; to explain the upwards transition over a few metres from the underlying deep-shelf mudstones and turbiditic sandstones ofthe Hareelv Formation; to make precise correlations and comparison with the Hartz Fjeld Formation of Milne Land to suggest an alternative to the fan delta interpretation of Sykes & Brand (1976) which was proved inadequate by Birkelund et al. (1984); and finally to place the Raukelv Formation better within the regional tectonic and provenance framework.
Highlights
The aims of the present study were: to interpret precisely the depositional environment of the coarsegrained, cross-bedded sandstones of the Raukelv Formation (Lower Volgian - Valanginian) of Jameson Land; to explain the upwards transition over a few metres from the underlying deep-shelf mudstones and turbiditic sandstones of the Hareelv Formation; to make precise correlations and comparison with the Hartz Fjeld Formation of Milne Land to suggest an alternative to the fan delta interpretation of Sykes & Brand (1976) which was proved inadequate by Birkelund et al (1984); and to place the Raukelv Formation better within the regional tectonic and provenance frarnework
The Raukelv Formation was erected by Surlyk et al (1973) for a sequence up to 300 m thick of very coarsegrained, cross-bedded sandstones of Early Volgian to Valanginian age
The marine nature of the formation was clearly recognized and the bulk of the sequence was interpreted in terms of a marine shelf sandwave system, while a fan delta interpretation was suggested for the giant-scale cross-beds (Surlyk, 1975; Surlyk et al 1981)
Summary
Sedimentological studies of the Upper Triassic to Lower Jurassic succession in central East Greenland were initiated in 1987 as a three-year research fellowship programme supported by British Petroleum Development, London (Dam, 1988). The study is primarilya lithofacies analysis, but ichnology, palynology sourcerock analysis, porosity/permeability analysis and diagenetic studies are included in the programme. The stratigraphic interval includes the Kap Stewart and Neill Klinter Formations which have many features in common with stratigraphically equivalent formations in offshore mid- and northem Norway that form some of the most important potential petroleum reservoirs in these areas. Sedimentological studies involved detailed lithofacies and ichnofacies analyses as well as sampling for palynofacies analyses, source rock analyses and reservoir rock properties
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