Geological Survey of Denmark and Greenland Bulletin 5 - 2004

Bulletin

The Jurassic of North-East Greenland

Edited by L. Stemmerik and S. Stouge

The Jurassic rift succession of East Greenland has been intensely studied over the last 25 years, particularly within the main outcrop areas of Jameson Land and Wollaston Forland. The more isolated and poorly known outcrops on Traill Ø, Hold with Hope, Hochstetter Forland and Store Koldewey were investigated in the late 1980s and mid-1990s in order to develop a better regional understanding of the Jurassic in eastern Greenland.

This collection of seven papers focuses on stratigraphic and depositional aspects of the Jurassic at these localities. Comprehensive descriptions of the Jurassic on Hold with Hope and south-eastern Traill Ø are accompanied by papers covering fluvial deposits and new ammonite collections from the Middle Jurassic of Traill Ø. The bulletin is concluded by studies of the dinoflagellate cyst stratigraphy of the Middle and Upper Jurassic of Hold with Hope, Hochstetter Forland and Store Koldewey.

Contents

Colophon, Contents, Preface (pdf, 0.3 Mb)
L. Stemmerik

 

Jurassic syn-rift sedimentation on a seawards-tilted fault block, Traill Ø, North-East Greenland (pdf, 0.4 Mb)
H. Vosgerau, P. Alsen, I.D. Carr, J. Therkelsen, L. Stemmerik and F. Surlyk

 

The fluviatile Bristol Elv Formation, a new Middle Jurassic lithostratigraphic unit from Traill Ø, North-East Greenland (pdf, 0.7 Mb)
J. Therkelsen and F. Surlyk

 

Maximum Middle Jurassic transgression in East Greenland: evidence from new ammonite finds, Bjørnedal, Traill Ø (pdf, 0.7 Mb)
P. Alsen and F. Surlyk. Appendix by J. H. Callomon

 

A new Middle–Upper Jurassic succession on Hold with Hope, North-East Greenland (pdf, 0.8 Mb)
H. Vosgerau, M. Larsen, S. Piasecki and J. Therkelsen

 

Jurassic dinoflagellate cyst stratigraphy of Hold with Hope, North-East Greenland (pdf, 0.5 Mb)
S. Piasecki, M. Larsen, J. Therkelsen and H. Vosgerau

 

Jurassic dinoflagellate cysts from Hochstetter Forland, North-East Greenland (pdf, 0.2 Mb)
S. Piasecki and L. Stemmerik

 

Jurassic dinoflagellate cyst stratigraphy of Store Koldewey, North-East Greenland (pdf, 0.2 Mb)
S. Piasecki, J.H. Callomon and L. Stemmerik

Preface

Stemmerik, L. & Stouge, S. (eds) 2004: The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5, 112 pp.

The Jurassic sedimentary succession in East and North-East Greenland reflects deposition during the early stages of rifting between Greenland and Norway. Jurassic sediments are exposed over a distance of more than 600 km, from Jameson Land in the south to Store Koldewey in the north, and form one of the best-known exposed ancient rift successions. The sediments have been intensely studied over the last 25 years and a synthesis of the Jurassic System in Greenland was recently given in Geological Survey of Denmark and Greenland Bulletin 1 (Surlyk 2003).

This collection of papers deals with stratigraphic and depositional aspects of the Middle-Upper Jurassic sediments from isolated and less well-known localities outside the main outcrop areas, and thus adds to the tremendous amount of new data generated from the classical Jurassic successions of Jameson Land and the Wollaston Forland area (Ineson & Surlyk 2003). Most papers are based on fieldwork in 1996 and 1997, carried out within the framework of the project 'Resources of the sedimentary basins of North and East Greenland' supported by the Danish Research Councils (see Stemmerik et al. 1997). Papers dealing with the Jurassic at Store Koldewey and Hochstetter Forland are based on material collected during regional mapping in 1989 (Stemmerik & Piasecki 1990).

During Middle-Late Jurassic times, rifting took place along major N-S-trending synthetic faults that delimited wide westwards-tilted fault blocks (Surlyk 1977, 2003). This resulted in the development of elongated marine embayments with major rivers entering from the north and dominantly axial sediment transport towards the south (Surlyk 1978, 2003; Engkilde & Surlyk 2003). The Jurassic syn-rift succession on south-eastern Traill Ø is an exception to this general pattern (Vosgerau et al. 2004a, see article above). Sedimentation took place on an eastwards-tilted fault block; the succession shows an eastwards proximal-distal decrease in sandstone-mudstone ratio, reflecting increasing water depths to the east. On the adjacent fault block to the west, a new lithostratigraphic unit, the Bristol Elv Formation, has been erected to describe a succession of fluvio-lacustrine sediments at the base of the Middle Jurassic rift succession (Therkelsen & Surlyk 2004, see article above). The non-marine succession is overlain by shallow marine sandstones of the Pelion Formation (Upper Bajocian), succeeded in turn by 25-30 m of black silty mudstones of the Fossilbjerget Formation (Alsen & Surlyk 2004, see article above). The presence of the Fossilbjerget Formation on southern Traill Ø indicates complete drowning of the sandy Pelion system during maximum Middle Jurassic transgression (Alsen & Surlyk 2004, see article above).

A new Middle-Upper Jurassic succession was found in the hangingwalls of small fault blocks at Hold with Hope during fieldwork in 1996 (Stemmerik et al. 1997). The up to 360 m thick succession and its stratigraphy are described in detail by Vosgerau et al. (2004b, this volume) and Piasecki et al. (2004a, see article above). The succession resembles that seen at Wollaston Forland and Kuhn Ø. The Hold with Hope area was flooded during late Middle Jurassic time; Lower-Middle Callovian shallow marine sandstones of the Pelion Formation overlie Lower Triassic sediments (Vosgerau et al. 2004b, see article above). The overlying sandstones of the Payer Dal Formation are of Middle-Late Oxfordian age. The uppermost part of the succession belongs to the Bernbjerg Formation. The youngest sediments are of Late Oxfordian - Early Kimmeridgian age based on dinoflagellate cysts (Piasecki et al. 2004a, see article above). Dinoflagellate cysts have also been used to date the scattered outcrops of Middle-Upper Jurassic sediments at Hochstetter Forland and Store Koldewey further to the north (Piasecki & Stemmerik 2004, see article above; Piasecki et al. 2004b, see article above). The dinoflagellate cyst assemblages of these northern outliers are readily correlated to assemblages described from the Middle-Upper Jurassic further to the south in East Greenland, and also show some resemblance to assemblages described from North Greenland (Piasecki et al. 2004b, see article above).

References

Alsen, P. & Surlyk, F. 2004: Maximum Middle Jurassic transgression in East Greenland: evidence from new ammonite finds, Bjørnedal, Traill Ø. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 31-49 (see article above)

 

Engkilde, M. & Surlyk, F. 2003: Shallow marine syn-rift sedimentation: Middle Jurassic Pelion Formation, Jameson Land, East Greenland. In: Ineson, J.R. & Surlyk, F. (eds): The Jurassic of Denmark and Greenland. Geological Survey of Denmark and Greenland Bulletin 1 , 813-863. Ineson, J.R. & Surlyk, F. 2003: The Jurassic of Denmark and Greenland. Geological Survey of Denmark and Greenland Bulletin 1, 948 pp.

 

Piasecki, S. & Stemmerik, L. 2004: Jurassic dinoflagellate cysts from Hochstetter Forland, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 89-97 (see article above)

 

Piasecki, S., Callomon, J.H. & Stemmerik, L. 2004a: Jurassic dinoflagellate cyst stratigraphy of Store Koldewey, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 73-88 (see link above)

 

Piasecki, S., Larsen, M., Therkelsen, J. & Vosgerau, H. 2004b: Jurassic dinoflagellate cyst stratigraphy of Hold with Hope, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 99-112 (see article above)

 

Stemmerik, L. & Piasecki, S. 1990: Post-Caledonian sediments in North-East Greenland between 76° and 78°30'N. Rapport Grønlands Geologiske Undersøgelse 148 , 123-126.

 

Stemmerik, L., Clausen, O.R., Korstgård, J., Larsen, M., Piasecki, S., Seidler, L., Surlyk, F. & Therkelsen, J. 1997: Petroleum geological investigations in East Greenland: project 'Resources of the sedimentary basins of North and East Greenland'. Geology of Greenland Survey Bulletin 176 , 29-38.

 

Surlyk, F. 1977: Stratigraphy, tectonics and palaeogeography of the Jurassic sediments of the areas north of Kong Oscars Fjord, East Greenland. Bulletin Grønlands Geologiske Undersøgelse 123 , 56 pp. Surlyk, F. 1978: Jurassic basin evolution of East Greenland. Nature 274(5667), 130-133.

 

Surlyk, F. 2003: The Jurassic of East Greenland: a sedimentary record of thermal subsidence, onset and culmination of rifting. In: Ineson, J.R. & Surlyk, F. (eds): The Jurassic of Denmark and Greenland. Geological Survey of Denmark and Greenland Bulletin 1 , 659-722.

 

Therkelsen, J. & Surlyk, F. 2004: The fluviatile Bristol Elv Formation, a new Middle Jurassic lithostratigraphical unit from Traill Ø, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 19-29 (see article above)

 

Vosgerau, H., Alsen, P., Carr, I.D., Therkelsen, J., Stemmerik, L. & Surlyk, F. 2004a: Jurassic syn-rift sedimentation on a seawards-tilted fault block, Traill Ø, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 9-18 (see article above)

 

Vosgerau, H., Larsen, M., Piasecki, S. & Therkelsen, J. 2004b: A new Middle-Upper Jurassic succession of Hold with Hope, North-East Greenland. In: Stemmerik, L. & Stouge, S. (eds): The Jurassic of North-East Greenland. Geological Survey of Denmark and Greenland Bulletin 5 , 51-71 (see article above)

Bulletin № 5 cover

Eastwards-dipping Middle-Upper Jurassic sandstones (yellow) and interbedded marine mudstones (dark) at the base of the coastal cliffs along the south-east coast of Traill Ø. The Jurassic succession is described by Vosgerau et al. (see article below). It is disconformably overlain by poorly exposed Cretaceous siltstones with numerous volcanic intrusions that form ledges towards the top of the c. 1050 m high cliff. Photo: Lars Stemmerik.

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