GEUS Bulletin no 5.pmd
GEUS Bulletin no 5.pmd GEUS Bulletin no 5.pmd
A 10 73º00′N 72º45′N 72º30′N ■■ ■■■■ 72º15′N B 23ºW Geographical Society Ø Greenland GREENLAND 1 ■■ ■■ Mestersvig 2 Bjørnedal 24ºW 23ºW 22ºW ■■ ■■ ■■ Steenstrup Dal ■■■■ ■■ ■■ ■■ ■■ ■■ ■■ ■■ Traill Ø ■■ Jameson Land 3 72º15'N 23ºW ■■ ■■ ■■ ■■ ■■ Svinhufvud Bjerge 4 Rold Bjerge ■■■■ ■■■■ ■■ ■■ ■■ ■■■■ ■■ ■■ ■■ BF ■■■■ ■■ ■■ ■■ ■■ ■■ ■■■■ Månedal Section A Vælddal ■■ ■■ ■■ ■■ ■■ ■■ MF ■■ ■■ VF Steenstrup Dal ■■ ■■ Section B Kong Oscar Fjord Drømmebugten ■■■■ ■■ Mols Bjerge ■■ ■■ Bjørnedal ■■■■ ■■ ■■ MBF 10 km 72º15'N Forårsdal 72º00′N N GEUS Bulletin no 5.pmd 10 29-10-2004, 11:13 B Drømmebugten 5 Forårsdal ■■ Palaeogene intrusives Palaeogene extrusives Cretaceous Jurassic Triassic Upper Permian Carboniferous Devonian Pre-Devonian Fault BF Bordbjerg Fault MF Månedal Fault MBF Mols Bjerge Fault VF Vælddal Fault 1–5 Sedimentological sections N
NW SE m 1000 500 0 NW SE m 1000 500 0 Månedal Fault zone Bordbjerg Fault Månedal Fault Syenitic plutons Basaltic sills Cretaceous progressively backstepped during the Bathonian and was eventually drowned in the Late Callovian due to increased rates of extension and a long-term eustatic rise in sea level (Engkilde & Surlyk 2003; Surlyk 2003). An exception to this simple pattern is found in southeastern Traill Ø, where an east-dipping fault block, more than 30 km wide, was formed during early rifting (Figs 1, 2; Carr 1998). It was limited to the west by the west-dipping Vælddal Fault (Donovan 1953; Carr 1998). The block, which is here termed the Bjørnedal Block, South coast, Traill Ø (Section A) Vælddal Vælddal Fault Steenstrup Dal Forchhammer Dal Rold Bjerge – Mols Bjerge (Section B) Upper Jurassic Middle Jurassic Triassic ? Bjørnedal Block Upper Permian Carboniferous Drømmebugten Mols Bjerge Fault Fault, arrows indicate direction of movement Fig. 2. NW–SE-oriented cross-sections showing the geological structure of eastern Traill Ø. Note the west-dipping Vælddal Fault, which forms the western limit of the Bjørnedal Block. Virtually all other Mesozoic faults in East Greenland dip towards the east and delimit westwards-tilted blocks. The positions of the sections are indicated on Fig. 1. Based on Koch & Haller (1971). Facing page: Fig. 1. Map of Traill Ø area showing the main faults and outcrops of the Jurassic succession. Positions of the structural cross sections (A, B) on Fig. 2 are indicated. Inset map (B) shows location of measured sedimentological sections (1–5). GEUS Bulletin no 5.pmd 11 29-10-2004, 11:14 ? Forårsdal 5 km probably continues southwards into northern Jameson Land where poorly exposed east-dipping correlative strata occur on the south side of Kong Oscar Fjord (Fig. 1). The aim of this study is to compare and contrast the syn-rift Middle–Late Jurassic stratigraphic syn-rift development on the eastwards-dipping Bjørnedal Block on south-east Traill Ø with the rest of the Jurassic basin of East Greenland, which is characterised by westwards-tilted blocks. 11
- Page 1 and 2: GEOLOGICAL SURVEY OF DENMARK AND GR
- Page 3 and 4: GEUS Bulletin no 5.pmd 3 29-10-2004
- Page 5 and 6: Contents Preface . . . . . . . . .
- Page 7 and 8: (Alsen & Surlyk 2004, this volume).
- Page 9: Jurassic syn-rift sedimentation on
- Page 13 and 14: GEUS Bulletin no 5.pmd 13 29-10-200
- Page 15 and 16: grained than the lower parasequence
- Page 17 and 18: the Pelion Formation. The mudstone-
- Page 19 and 20: The fluviatile Bristol Elv Formatio
- Page 21 and 22: Name. After the river Bristol Elv i
- Page 23 and 24: edded, and display both sheet-like
- Page 25 and 26: N S Fig. 5. Coarse-grained sandston
- Page 27 and 28: Fig. 7. Lacustrine deposits from th
- Page 29 and 30: deposition of peat and coal. Journa
- Page 31 and 32: Maximum Middle Jurassic transgressi
- Page 33 and 34: 834 N Lycett Bjerg Barrikade Gletsc
- Page 35 and 36: SW NE Lycett Bjerg Parnas Member Be
- Page 37 and 38: Cadoceras cf. nordenskjoeldi Callom
- Page 39 and 40: GEUS Bulletin no 5.pmd 39 29-10-200
- Page 41 and 42: 4 C B 1 2 GEUS Bulletin no 5.pmd 41
- Page 43 and 44: Fig. 1. Sketch-map of the Jameson L
- Page 45 and 46: Table 1. Measurement of dimensions
- Page 47 and 48: GEUS Bulletin no 5.pmd 47 29-10-200
- Page 49 and 50: 1 2 GEUS Bulletin no 5.pmd 49 29-10
- Page 51 and 52: A new Middle-Upper Jurassic success
- Page 53 and 54: 74º00'N ■■ ■■ ■■ 73º5
- Page 55 and 56: System Ma 159.4 154.1 164.4 169.2 1
- Page 57 and 58: Sedimentary structures Biota Struct
- Page 59 and 60: wards units is biogenic carbonate d
A<br />
10<br />
73º00′N<br />
72º45′N<br />
72º30′N<br />
■■ ■■■■<br />
72º15′N<br />
B<br />
23ºW<br />
Geographical Society Ø<br />
Greenland<br />
GREENLAND<br />
1<br />
■■<br />
■■<br />
Mestersvig<br />
2<br />
Bjørnedal<br />
24ºW 23ºW 22ºW<br />
■■ ■■<br />
■■<br />
Steenstrup Dal<br />
■■■■ ■■<br />
■■ ■■<br />
■■<br />
■■<br />
■■<br />
■■<br />
Traill Ø<br />
■■<br />
Jameson<br />
Land<br />
3<br />
72º15'N 23ºW<br />
■■<br />
■■<br />
■■<br />
■■<br />
■■<br />
Svinhufvud<br />
Bjerge<br />
4<br />
Rold<br />
Bjerge<br />
■■■■<br />
■■■■ ■■<br />
■■<br />
■■<br />
■■■■ ■■<br />
■■<br />
■■<br />
BF<br />
■■■■ ■■ ■■ ■■<br />
■■ ■■<br />
■■■■<br />
Månedal<br />
Section A<br />
Vælddal<br />
■■<br />
■■ ■■<br />
■■ ■■<br />
■■<br />
MF<br />
■■ ■■<br />
VF<br />
Steenstrup Dal<br />
■■<br />
■■<br />
Section B<br />
Kong Oscar Fjord<br />
Drømmebugten<br />
■■■■ ■■<br />
Mols<br />
Bjerge<br />
■■ ■■<br />
Bjørnedal<br />
■■■■ ■■ ■■<br />
MBF<br />
10 km<br />
72º15'N<br />
Forårsdal<br />
72º00′N<br />
N<br />
<strong>GEUS</strong> <strong>Bulletin</strong> <strong>no</strong> <strong>5.pmd</strong> 10<br />
29-10-2004, 11:13<br />
B<br />
Drømmebugten<br />
5<br />
Forårsdal<br />
■■<br />
Palaeogene intrusives<br />
Palaeogene extrusives<br />
Cretaceous<br />
Jurassic<br />
Triassic<br />
Upper Permian<br />
Carboniferous<br />
Devonian<br />
Pre-Devonian<br />
Fault<br />
BF Bordbjerg Fault<br />
MF Månedal Fault<br />
MBF Mols Bjerge Fault<br />
VF Vælddal Fault<br />
1–5<br />
Sedimentological<br />
sections<br />
N
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