Abstract

The sedimentation and basin evolution of the Kangerlussuaq Basin, southern East Greenland has gained renewed interest with the licensing rounds offshore the Faroe Islands in 2000 and 2005, as it forms an important analogy to the Faroese geological setting. The Faroes frontier area is in part covered by basalts and is a high-risk area with poorly known plays and sedimentary basins. It is therefore essential to obtain as much information as possible on the evolution of sedimentary basins on the rifted volcanic margins closest to the Faroese Islands margin. Plate reconstructions of the North Atlantic region indicate the former close proximity of East Greenland to the Faroe Islands region (Fig. 1), and the Kangerlussuaq Basin thus constitutes the most important field analogue with respect to stratigraphy, major unconformities and basin evolution. The study of the sedimentary succession in the Kangerlussuaq Basin, and the provenance of the sandstones in particular, will provide constraints on exploration models and may help to predict the distribution of potential reservoir sandstones in the Faroese offshore basins, and eventually lead to development of play types that are new to this frontier region.This paper presents the main conclusions from two research projects: Stratigraphy of the pre-basaltic sedimentary succession of the Kangerlussuaq Basin Volcanic basin of the North Atlantic and An innovative sedimentary provenance analysis, jointly undertaken by the Geological Survey of Denmark and Greenland (GEUS) and CASP (formerly Cambridge Arctic Shelf Programme). Both projects were initiated in October 2002 and concluded in September 2005. They form part of Future Exploration Issues Programme of the Faroese Continental Shelf (SINDRI programme), established by the Faroese Ministry of Petroleum and financed by the partners of the Sindri Group (see Acknowledgements).

Highlights

  • The sedimentation and basin evolution of the Kangerlussuaq Basin, southern East Greenland has gained renewed interest with the licensing rounds offshore the Faroe Islands in 2000 and 2005, as it forms an important analogy to the Faroese geological setting

  • This paper presents the main conclusions from two research projects: Stratigraphy of the pre-basaltic sedimentary succession of the Kangerlussuaq Basin -Volcanic basin of the North Atlantic and An innovative sedimentary provenance analysis, jointly undertaken by the Geological Survey of Denmark and Greenland (GEUS) and CASP

  • Selandian marine turbiditic sandstones in the Kangerlussuaq Basin can be shown to be derived from beach placer deposits; their high Zr contents and characteristic U/REE ratios are indicative of a high heavy mineral content

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Summary

Palaeogene sandstones of the Kangerlussuaq Basin

The Early Palaeogene succession in the Kangerlussuaq Basin consists of three distinct sandy units labelled 5a, 5b and 6 (Fig. 2), which represent different depositional environments. Graded thin-bedded sandstones dominate the lowest unit (5a); the sandstones are laterally consistent and may form amalgamated units up to 20 m thick. They were deposited in a deep marine environment and represent Selandian turbidite channel-fill and distal submarine fan lobes (Larsen et al 1999). The unit (5b) consists of well-sorted fine- to medium-grained sandstones showing hummocky cross-stratification and wave ripples. The sandstones are bioturbated showing traces of Ophimorpha isp. Unit 6 represents fluvial sandstones deposited in a proximal braided river system (Fig. 3)

Sandstone provenance
Age determinations of detrital zircon
Greenland sands in offshore basins?
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