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Review of Greenland Avtivities 2001

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Review of Greenland Avtivities 2001 GEOLOGY OF GREENLAND SURVEY BULLETIN 191 • 2002 Review of Greenland activities 2001 GEOLOGICAL SURVEY OF DENMARK AND GREENLAND MINISTRY OF THE ENVIRONMENT GEUS GSB191-Indhold 13/12/02 11:28 Side 1 GEOLOGY OF GREENLAND SURVEY BULLETIN 191 • 2002 Review of Greenland activities 2001 Edited by A.K. Higgins, Karsten Secher and Martin Sønderholm GEOLOGICAL SURVEY OF DENMARK AND GREENLAND MINISTRY OF THE ENVIRONMENT GSB191-Indhold 13/12/02 11:28 Side 2 Geology of Greenland Survey Bulletin 191 Keywords Geological mapping, Greenland activities 2001, limnology, marine geophysics, mineral resources, palynology, petroleum geology, sedimentology, sequence stratigraphy, stratigraphy. Cover A major landslide was reported from the southern shore of the Nuussuaq peninsula in November 2000 (see Pedersen et al., page 73). During the follow-up field studies, periodic minor rock falls created dust clouds that prompted the local population to designate the area as the ‘smoking mountains’. Highest summits are 1900 m above the fjord. View to the east from a vantage point on the island of Disko. Photo: Stig A. Schack Pedersen. Frontispiece: facing page Outcrop of the contact zone of a 20 m wide kimberlitic dyke south-west of Kangerlussuaq airport, southern West Greenland. This dyke is one of the largest known kimberlite dykes in the world. The locality is marked J on Fig. 2 in Jensen et al. (page 58). Photo: Sven Monrad Jensen. Chief editor of this series: Peter R. Dawes Scientific editors: A.K. Higgins, Karsten Secher and Martin Sønderholm Technical editing: Esben W. Glendal Illustrations: Annabeth Andersen, Lis Duegaard, Jette Halskov and Stefan Sølberg Lay-out and graphic production: Carsten E. Thuesen Printers: Schultz Grafisk, Albertslund, Denmark Manuscripts submitted: 28 January – 25 February 2002 Final versions approved: 9 August 2002 Printed: 3rd December 2002 ISBN 87-7871-098-7 ISSN 1397-1905 Geology of Greenland Survey Bulletin The series Geology of Greenland Survey Bulletin is a continuation of Bulletin Grønlands Geologiske Undersøgelse and incorporates Rapport Grønlands Geologiske Undersøgelse. Citation of the name of this series It is recommended that the name of this series is cited in full, viz. Geology of Greenland Survey Bulletin. If abbreviation of this volume is necessary the following form is suggested: Geology Greenland Surv. Bull. 191, 161 pp. Available from Geological Survey of Denmark and Greenland Øster Voldgade 10, DK-1350 Copenhagen K, Denmark Phone: +45 38 14 20 00, fax: +45 38 14 20 50, e-mail: [email protected] or Geografforlaget ApS Fruerhøjvej 43, DK-5464 Brenderup, Denmark Phone: +45 63 44 16 83, fax: +45 63 44 16 97, e-mail: [email protected] Danmarks og Grønlands Geologiske Undersøgelse (GEUS), 2002 GSB191-Indhold 13/12/02 11:28 Side 3 GSB191-Indhold 13/12/02 11:29 Side 4 1616 14 9, 10 11 7 15 8 3 12, 13 1 2 4 4 5 6 17 500 km 18 Physiographic map of Greenland showing the locations discussed in the 18 technical papers of this volume. The map is reproduced with courtesy of the National Survey and Cadastre, Copenhagen. For a full list of Survey field activities in 2001 and for the geographical subdivisions as used in this bulletin, see the map in the directorial review (Fig. 1, page 10). 4 GSB191-Indhold 13/12/02 11:29 Side 5 Contents Numbers of articles correspond to those on the map opposite The year in focus, 2001 K. Sørensen 9 1. Precambrian geology of the northern Nagssugtoqidian orogen, West Greenland: mapping in the Kangaatsiaq area J.A.M. van Gool, G.I. Alsop, U.E. Árting, A.A. Garde, C. Knudsen, A.W. Krawiec, S. Mazur, J. Nygaard, S. Piazolo, C.W. Thomas and K. Thrane 13 2. The Precambrian supracrustal rocks in the Naternaq (Lersletten) and Ikamiut areas, central West Greenland C. Østergaard, A.A. Garde, J. Nygaard, J. Blomsterberg, B.M. Nielsen, H. Stendal and C.W. Thomas 24 3. A coastal survey in the southern part of the Palaeoproterozoic Rinkian fold belt, central West Greenland A.A. Garde, J.N. Connelly, A.W. Krawiec, S. Piazolo and K. Thrane 33 4. The mineral resource potential of the Nordre Strømfjord – Qasigiannguit region, southern and central West Greenland H. Stendal, J. Blomsterberg, S.M. Jensen, M. Lind, H.B. Madsen, B.M. Nielsen, L. Thorning and C. Østergaard 39 5. Geological correlation of magnetic susceptibility and profiles from Nordre Strømfjord, southern West Greenland B.M. Nielsen and T.M. Rasmussen 48 6. Kimberlites and other ultramafic alkaline rocks in the Sisimiut–Kangerlussuaq region, southern West Greenland S.M. Jensen, H. Hansen, K. Secher, A. Steenfelt, F. Schjøth and T.M. Rasmussen 57 7. Aeromagnetic survey in central West Greenland: project Aeromag 2001 T.M. Rasmussen 67 8. Tsunami-generating rock fall and landslide on the south coast of Nuussuaq, central West Greenland S.A.S. Pedersen, L.M. Larsen, T. Dahl-Jensen, H.F. Jepsen, G.K. Pedersen, T. Nielsen, A.K. Pedersen, F. von Platen-Hallermund and W. Weng 73 9. Petroleum geological activities in West Greenland in 2001 F.G. Christiansen, J.A. Bojesen-Koefoed, J.A. Chalmers, F. Dalhoff, C. Marcussen, T. Nielsen, H. Nøhr-Hansen and M. Sønderholm 84 10. A multidisciplinary study of the Palaeogene succession offshore southern West Greenland F. Dalhoff, J.A. Chalmers, H. Nøhr-Hansen, J.A. Rasmussen, E. Sheldon and U. Gregersen 90 11. Evidence for continental crust in the offshore Palaeogene volcanic province, central West Greenland N. Skaarup 97 12. The post-basaltic Palaeogene and Neogene sediments at Kap Dalton and Savoia Halvø, East Greenland M. Larsen, S. Piasecki and L. Stemmerik 103 13. Paleocene sub-basaltic sediments on Savoia Halvø, East Greenland H. Nøhr-Hansen and S. Piasecki 111 14. Lower–Middle Ordovician stratigraphy of North-East Greenland S. Stouge, W.D. Boyce, J.L. Christiansen, D.A.T. Harper and I. Knight 117 15. Late Permian carbonate concretions in the marine siliciclastic sediments of the Ravnefjeld Formation, East Greenland J.K. Nielsen and N.-M. Hanken 126 5 GSB191-Indhold 13/12/02 11:29 Side 6 16. Qaanaaq 2001: mineral exploration reconnaissance in North-West Greenland B. Thomassen, P.R. Dawes, A. Steenfelt and J.D. Krebs 133 17. Lake-catchment interactions with climate in the low Arctic of southern West Greenland N.J. Anderson, S.C. Fritz, C.E. Gibson, B. Hasholt and M.J. Leng 144 18. Glaciological investigations on ice-sheet response in South Greenland C. Mayer, C.E. Bøggild, S. Podlech, O.B. Olesen, A.P. Ahlstrøm and W. Krabill 150 Scientific publications on Greenland by the Survey, 2001 P.R. Dawes 157 6 GSB191-Indhold 13/12/02 11:29 Side 7 90° 80° 70° 60° 50° 40° 30° 20° 10° 0° 10° 80° Geological map Canada ▲ of IO ▲ 90° Lincoln Wandel 10° Greenland: nd Alert Station sla Sea Sea Nord e I onshore/offshore er m s ▲ lle ▲ G E ▲ ▲ r t ▲ i ■ ■ e ra ▲ Based on map compiled by ° t ▲ 78 ■ e ° S ▲ 78 s ■ ▲ re ▲ n T.C.R. Pulvertaft, Geological a ▲ l N ▲ a ° ▲ 80 ■ ° ▲ 0 Survey of Denmark and n ▲ ■ IMB d ■ Greenland. The bathymetric ■ ■ ■ ■ contour shown is at 500 m. S ■ ■ ■ Qaanaaq ■ ■ ■ ■ e ■ ■ ■ ■ ° ■ a ■ ° 76 ■ ■ 76 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ▲ ■ ■ ▲ ■ ■ ■ ■ ▲ ■ M ■ ▲ ■ ■ ■ e ■ ■ ■ ■ lv ▲ ■ ■ ■ ■ il ■ l ■ e ■ ■ ■ ■ ■ B ■ ■ u ■ ° ■ g 74 t ° ■ 74 ■ ■ ■ ■ ■ ° ■ ° ■ 70 ■ 10 ■ Greenland ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Daneborg ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ▲ ■ ■ ■ ■ ▲ ■ ■ ■ ■ ■ ■ ▲ ▲ ° ▲ 72 ▲ ■ ° ■ 72 Baffin ■ ■ Upernavik ■ ■ ■ Bay ■ ■ Inland Ice ■ R ■ ■ M ■ ■ B ■ ■ ■ ▲ ▲ ■ ▲ ▲ ■ a ▲ d ▲ a ° ■ 70° 70 n a ■ ■ Illoqqortoormiut / C ■ ■ ■ ■ ■ Scoresbysund h ■ ■ t ▲ i ▲ ■ ▲ ▲ ■ ■ w ▲ ▲ ■ ■ r e ■ ■ d ■ r o 500 m ■ B Ilulissat Disko ■ ° 68° Bugt 68 ■ ■ ▲ ■ ▲ ▲ ■ NMB ▲ ■ Davis ■ ■ ▲ ▲ ▲ ▲ ■ ▲ Permanent ice ▲ ▲ ■ ▲ Iceland ▲ ▲ Strait ▲ t ▲ Sisimiut i ° ■ ° 66 a 66 ■ ■ r Intrusive complexes; Palaeogene in East ■ ■ t ° ■ ° 60 ■ 66 S Greenland,20° Mesoproterozoic in South Greenland ■ ■ ■ k ■ r Basalts: Palaeogene in East and West Green- ■ ▲ ■ ■ a ▲ land; Upper Cretaceous in North Greenland ■ ▲ ■ ■ ■ ▲ m ■ n Cretaceous–Palaeogene sediments, ■ e ■ Tasiilaq ■ ° ■ ReykjavikWest Greenland° and East Greenland; 64 ■ D 64 ■ ■ Nuussuaq and Kangerlussuaq Basins ■ ° ■ ■ ■ 64 ■ ■ ■ Nuuk Carboniferous–Palaeogene sediments, ■ ■ 500 m ■ Wandel Sea Basin in North Greenland ■ ■ ■ 500 m ■ 500 km Carboniferous–Cretaceous sediments, ■ ■ ■ ■ East Greenland, Jameson Land Basin ° 62° ■ 30 62° and North-East Greenland ■ 62° Offshore basins with substantial Devonian sediments and volcanics, ■ sediment thicknesses North-East Greenland ■ ■ Offshore basins where deeper Shelf sedimentary successions are concealed Lower Palaeozoic sediments, North 60° Greenland. * Reaches Devonian 60° KMB by Palaeogene basalts ■ Franklinian Basin, IO: Innuitian orogen Labrador Qaqortoq North Atlantic Trough* ■ Sea ■ Landward limit of provenOcean oceanic crust 60° Meso- to Neoproterozoic sediments and ■ volcanic rocks ■ ■ Extensional fault Caledonian orogenic belt, contains Archaean, ▲ Proterozoic and Palaeozoic rocks ▲ ▲ Compressional fault, thrust 50° 40° Palaeoproterozoic orogenic belts, contain both Archaean and Proterozoic rocks 35° 30° 25° Strike-slip fault IMB: Inglefield mobile belt; RMB: Rinkian mobile belt; KMB: Ketilidian mobile belt; Transform fault NMB: Nagssugtoqidian mobile belt Site of exploration well Archaean craton 7 GSB191-Indhold 13/12/02 11:29 Side 8 GSB191-Indhold 13/12/02 11:29 Side 9 The year in focus, 2001 Kai Sørensen Director Field activities in Greenland by the Geological Survey are approved by the Board of GEUS, on which BMP is of Denmark and Greenland (GEUS) in 2001 were again represented. many and varied. They included economic investiga- External sources of funding for Greenland activities tions of crystalline basement and sedimentary rocks in in 2001, as in previous years, came primarily from BMP North-West Greenland, and a systematic mapping pro- and from Danish and international research founda- ject combined with resource evaluation in the bound- tions of which the most important are the Danish Natural ary zone of the Nagssugtoqidian and Rinkian mobile Science Research Council, the Carlsberg Foundation, belts of central and southern West Greenland. In addi- the Commission for Scientific Research in Greenland and tion, studies of the Vendian to Lower Palaeozoic suc- the European Union.
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