Review of Greenland Avtivities 2001 - Geus

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▲ Albert Heim Bjerge Wordie Gletcher Greenland Reservatet 27° C. H. Ostenfeld Nunatak Albert Heim Bjerge 21° 74° ▲ ▲ ▲ ▲ ▲ 74° Vibeke Elv Albert Heim Bjerge 6 Inland Ice ▲ ▲ ▲ ▲ ▲ Kap Weber Kejser Franz Joseph Fjord Ymer Ø Ella Ø Bastionb ugt Promenadedal Solitærbugt Fimbulfjeld 10 km 50 km ▲ Ella Ø Traill Ø Bastionen Antiklinalbugt 4 72° ▲ ▲ 27° Kong Oscar Fjord Mestersvig 21° 10 km 5 POST-CALEDONIAN CALEDONIAN OROGENIC BELT ELLA Ø / ALBERT HEIM BJERGE Palaeogene igneous rocks Caledonian granites Quaternary Base camp East Greenland Basin Carboniferous–Cretaceous sediments LATE TO POST-CALEDONIAN Devonian continental sediments CALEDONIAN FORELAND Crystalline rocks Greenland shield ▲ ▲ Neoproterozoic–Ordovician sediments Crystalline complexes (Archaean–Mesoproterozoic) Thrust Fault/shear zone Devonian continental sediments Ordovician marine sediments Cambrian fluviatile and marine sediments Vendian, Tillite Group tillites and marine sediments Riphean, Eleanore Bay Supergroup marine sediments Measured section Fig. 1. Locality map of North-East Greenland with simplified geology. The inset maps of Ella Ø and Albert Heim Bjerge show locations of the investigated sections 4, 5 and 6. Geology modified from Cowie & Adams (1957) and Henriksen (1999). Unit A Unit A is 100 m thick. The sequence is made up of metre-thick carbonate beds composed of domal to broad, flat stromatolitic and thrombolitic mounds (Fig. 5), laminated lime mudstone and dolostone, intraclastic limestones, minor chert nodules and white-weathering silty interbeds. The macrofauna recorded from the unit includes trilobites, cephalopods and gastropods. The lower interval is characterised by the trilobite Peltabellia sp. whereas the higher part of Unit A is referred to the Strigigenalis brevicauda Zone (Boyce 1989; Boyce & Stouge 1997). These two faunal intervals represent the Jeffersonian Stage of the Canadian Series. The sparse conodont fauna (Smith 1991) is included in the comprehensive Fauna D of Ethington & Clark (1971). Smith (1991) had 118
System Series North America Stage Ibex-Utah, USA Trilobite zones Ross (1951); Hintze (1953, 1973) W. Newfoundland Trilobite zones Boyce & Stouge (1997) Albert Heim Bjerge North-East Greenland Formations informal units Ella Ø Middle Whiterockian O L (Not zoned) Heimbjerge Narwhale Sound Hiatus Narwhale Sound Ordovician Lower Canadian Cassinian Jeffersonian J I H G Benthamaspis gibberula Strigigenalis caudata Strigigenalis brevicaudata (‘Peltabellia sp.’) Cape Weber Cape Weber Unit D Unit C Unit B Unit A Demingian E/F Randaynia saundersi ? Hiatus Gasconadian B Symphysurina Antiklinalbugt Antiklinalbugt Fig. 2. The upper Lower to Middle Ordovician stratigraphy of North-East Greenland compared to trilobite zones of Utah, USA and western Newfoundland, Canada. Vega Sund Kong Oscar Fjord Fig. 3. Plateau of Ella Ø showing the lower part of section 4 looking northeast. The banded unit to the left is Unit B, which is succeeded by Unit C. Camp (in circle) for scale. 119
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GEOLOGY OF GREENLAND SURVEY BULLETI
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Geology of Greenland Survey Bulleti
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Contents Numbers of articles corres
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■ ■ ■ ■ ■ ■ ■ ■ ■
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Canada Pituffik O 1 Thule Air Base
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Publications A complete list of geo
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Canada Greenland Greenland Inland I
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northern Nagssugtoqidian orogen (SN
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western to the north-eastern corner
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group consists of conjugate sets of
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y pure shear. Coincidence of the or
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The Precambrian supracrustal rocks
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68°25′ 52° 68°25′ BIF 0 3 km
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Fig. 4. Dolomitic marble in the sou
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Bugt (Fig. 1; Henderson 1969). The
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Keto, L. 1962: Aerial prospecting b
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▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲
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increases towards the south. We obs
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Kalsbeek, F. & Taylor, P.N. 1999: R
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Canada Nuussuaq 0 50 km PROTEROZOIC
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deposit. Descriptions of the differ
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Pegmatites The gneisses throughout
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tacts with quartzo-feldspathic coun
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Geological correlation of magnetic
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Fig. 2. The hand-held magnetic susc
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Susceptibility distribution (%) Sus
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have a reducing effect, which hinde
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ancy between the susceptibility val
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67° Sisimiut • 53° 52° 51° 50
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Table 1. Range of Nb concentrations
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chemical composition - may indicate
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Concentration/C1 chondrite 100.00 1
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Menzies, M.A. & Hawkesworth, C.J. (
Page 70 and 71: 72°30´ Aeromag 2001 50 km Upernav
Page 72 and 73: 56° 54° 52° 72° 72° nT 71°30
Page 74 and 75: Conclusions The aeromagnetic survey
Page 76 and 77: 53° 51° Inland Ice Greenland 72°
Page 78 and 79: On the south coast of Nuussuaq, wes
Page 80 and 81: Fig. 5. Blocks and boulders in the
Page 82 and 83: 2000 SW NE 1500 Surface trace 1985
Page 84 and 85: 1979). Along other sections of the
Page 86 and 87: Petroleum geological activities in
Page 88 and 89: Seismic acquisition during summer 2
Page 90 and 91: Other petroleum geological work Alt
Page 92 and 93: A multidisciplinary study of the Pa
Page 94 and 95: Seismic interpretation The grid of
Page 96 and 97: Middle Eocene Lower Eocene Upper Pa
Page 98 and 99: Chalmers, J.A., Dahl, J.T., Bate, K
Page 100 and 101: 95-06 ▲ ▲ 58° 95-12 95-10 56°
Page 102 and 103: 70° 71° 60° 2000 2000 2400 400 1
Page 104 and 105: Storey, M., Duncan, R.A., Pedersen,
Page 106 and 107: 24° 100 km 30° 27° 21 ° Jameson
Page 108 and 109: Oligocene Krabbedalen Fm Eocene Bop
Page 110 and 111: grading. Bivalve shell material is
Page 112 and 113: References Birkenmajer, K. 1972: Re
Page 114 and 115: B A 72° Palaeogene basalts Gl 50 k
Page 116 and 117: a b c d e f g h 20 µm i j k l Fig.
Page 118 and 119: offshore South-East Greenland, onsh
Page 122 and 123: T D A CW NS placed the lowermost c.
Page 124 and 125: is abundant and highly diverse, and
Page 126 and 127: The Heimbjerge Formation comprises
Page 128 and 129: Late Permian carbonate concretions
Page 130 and 131: m 25 20 15 B3 L2 B2 Fig. 3. Simplif
Page 132 and 133: (2001), who pointed out the restric
Page 134 and 135: Piasecki, S. 1984: Preliminary paly
Page 136 and 137: 66° 68° • • • • • • 7
Page 138 and 139: absent at Tikeraussaq where a postu
Page 140 and 141: 72° 70° 68° 66° Sample locality
Page 142 and 143: Table 2. Summary of selected elemen
Page 144 and 145: Concluding remarks Observations dur
Page 146 and 147: Lake-catchment interactions with cl
Page 148 and 149: lakes. As in earlier reports (e.g.
Page 150 and 151: Discussion Global climate models pr
Page 152 and 153: Glaciological investigations on ice
Page 154 and 155: Fig. 2. The new one-mast design of
Page 156 and 157: A B N 20 km 1993 1995 Fig. 5. Satel
Page 158 and 159: Krabill, W., Frederick, E., Manizad
Page 160 and 161: 2001/47: Calibration of stream sedi
Page 162 and 163: Hanghøj, K., Kelemen, P., Bernstei
Page 165 and 166: Danmarks og Grønlands Geologiske U
Page 167: GEOLOGY OF GREENLAND SURVEY BULLETI
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