Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

More documents

Recommendations

Info

delta front ts channel channel 25 m delta front ts delta front delta front ts ts Fig. 57. The Kingittoq Member at Asuk showing thick fluvial channel deposits overlying coarsening-upward delta front successions capped by transgressive shoreface sandstones (ts). For location, see Fig. 2 and Fig. 55: 44–83 m. Nuussuaq, the upper boundary of the Kingittoq Member is generally poorly exposed due to landslides and rock glaciers, but east of Ikorfat it is overlain by small outcrops of Campanian–Maastrichtian mudstone (the Itilli For - mation) and Paleocene tuffaceous mudstone (the Eqalulik Formation) (Birkelund 1965; A.K. Pedersen et al. 2006b) (Fig. 22). channel delta plain delta front channel delta plain delta front delta plain channel delta front delta plain channel 30 m Fig 58. Outcrop of the Kingittoq Member on the eastern slope of the Qallunnguaq valley (for location, see Fig. 40). Delta plain facies constitute a large proportion of the succession and delta front deposits are thin and fine-grained suggesting lowenergy depositional environments (lower delta plain with swamps, shallow lakes and interdistributary bays (Nielsen 2003)). The channel sandstone at the top of the photo - graph is the lowermost fluvial unit in a multi-storey sandstone body studied by Jensen (2000) and Jensen & Pedersen (in press). 76
Fig. 59. The Kingittoq Member at King - ittoq, see 310–465 m in Fig. 53. Most fluvial channels are braided, but a point bar succession is seen in the centre of the photo with inclined accretionary surfaces (indicated by dotted line); ch, fluvial channel; df, delta front. For location, see Fig 40. Atanikerluk Formation sill Atane Formation df ch ch Geological age. The geological age of the Kingittoq Member ranges from Albian (Tartunaq) to Cenomanian (Atani - kerluk, Saqqaqdalen, Kingittoq, Kussinerujuk, Asuk and Ravn Kløft) and into Early Turonian (Saqqaqdalen, Kingittoq and Asuk). The deposits are dated on the basis of spores, pollen and marine dinocysts (Croxton 1978a, b; Lanstorp 1999; McIntyre 1994a, personal communication 1997; this study). Correlation. The Kingittoq Member is coeval with the Skansen Member (eastern Disko); the Kingittoq Member of southern Nuussuaq may be equivalent the Ravn Kløft Member on northern Nuussuaq (Fig. 16). The Kingittoq Member correlates with the Upernivik Næs Formation on Upernivik Ø, and possibly to the lower part of the Itilli Formation of western Nuussuaq and Svartenhuk Halvø. Qilakitsoq Member new member History. The Qilakitsoq Member includes sediments referred to the Atane Formation on southern and central Nuussuaq, and sediments formerly referred to the now abandoned Pautût (or Patoot) Formation (see above under history of the Atane Formation). Name. The name is derived from the Qilakitsoq stream, a tributary to the Kuussuaq river which flows through the Aaffarsuaq valley on central Nuussuaq (Fig. 82). Distribution. The Qilakitsoq Member is the sole representative of the Atane Formation in central Nuussuaq and parts of southern Nuussuaq. Outcrops are found from Agatdalen to Ilugissoq along the north slope of the Aaffarsuaq Valley and along the south coast from Paatuut to Alianaatsunnguaq (Figs 2, 40, 82). Type section. The type section of the Qilakitsoq Member is along the Qilakitsoq stream on central Nuussuaq (Figs 60, 82). The base of the type section is located at 70°27.97´N, 53°27.13´W. Reference sections. Reference sections are found at Nuuk Killeq and Ataata Kuua (type section of the Atane Formation; Fig. 43). Two continuously cored boreholes from the Paatuut area (GGU 247701 and GGU 247901) provide reference sections of the Qilakitsoq Member and have been described in detail by Ambirk (2000). Thickness. The type section documents a minimum thickness of 480 m, but correlation with nearby sections shows that at least 820 m are exposed in the Qilakitsoq area, and c. 600 m are known from the well at Ataata Kuua together with nearby outcrops (Fig. 43; A.K. Pedersen et al. 2007b). Lithology. The Qilakitsoq Member is characteristically cyclic, individual cycles typically passing up from mudstones through heteroliths, well-sorted sandstones, coarser grained sandstones with ribbon geometry, and finally into carbonaceous mudstones with coal beds overlain by thin sheets of bioturbated sandstone (Fig. 60; Midtgaard 77
Page 1 and 2:
GEOLOGICAL SURVEY OF DENMARK AND GR
Page 4 and 5:
Contents Abstract . . . . . . . . .
Page 7 and 8:
Preface The onshore Cretaceous-Pale
Page 9 and 10:
Introduction The Nuussuaq Basin bel
Page 11 and 12:
chemistry of the Nuussuaq Basin hav
Page 13 and 14:
Fig. 5. Plant fossils from the Atan
Page 15 and 16:
Peak 2010 m Peak 1900 m Peak 1760 m
Page 17 and 18:
A lithostratigraphy for the marine
Page 19 and 20:
to provide further funding for stud
Page 21 and 22:
DGR Geological setting As a result
Page 23 and 24:
TSS 8 Agatdal Fm Eqalulik Fm Kangil
Page 25 and 26: A Svartenhuk Halvø 50 km B Hinterl
Page 27 and 28: Nuussuaq Group new group History. T
Page 29 and 30: ley (Figs 2, 40, 65). The section a
Page 31 and 32: Central Nuussuaq Agatdalen South co
Page 33 and 34: 3 10 4 6 5 Qorlortorssuaq Slibesten
Page 35 and 36: volcanic sediments are referred to
Page 37 and 38: Fig. 20. View from Uummannaq toward
Page 39 and 40: In the Kuuk area, the sediments ove
Page 41 and 42: m m 15 14 14 13 12 11 10 9 8 7 6 5
Page 43 and 44: Kome Formation m 40 30 20 D tial re
Page 45 and 46: Fig. 28. Reference locality of the
Page 47 and 48: Vaigat Fm Vesterfjeld Slibestensfje
Page 49 and 50: Gilbert delta in the Ikorfat area (
Page 51 and 52: 150 300 450 100 250 400 m 550 50 20
Page 53 and 54: Fig. 36. Outcrop of the Upernivik N
Page 55 and 56: Correlation. The Upernivik Næs flo
Page 57 and 58: 12’ 09’ 15’ 06’ 03’ Saqqa
Page 59 and 60: m 0 GGU 247801 200 400 247815 ★
Page 61 and 62: wave-rippled sand streaked mudstone
Page 63 and 64: the formation in the marine mudston
Page 65 and 66: d d Fig. 47. Type locality of the S
Page 67 and 68: Fig. 49. Cross-bedded medium- to co
Page 69 and 70: and Qaarsut (Fig. 22). Its wider di
Page 71 and 72: Fig. 52. Two closely spaced section
Page 73 and 74: Type section. The type section of t
Page 75: Fig. 56. Delta front succession of
Page 79 and 80: sh L sh ch delta front Vaigat Forma
Page 81 and 82: Fig. 63. Type locality of the Itivn
Page 83 and 84: 782 Quaternary cover 54° 888 Malig
Page 85 and 86: Kuugannguaq-Qunnilik Fault and is o
Page 87 and 88: and include clasts of intraformatio
Page 89 and 90: deposited in a base-of-slope and ba
Page 91 and 92: VK 53°30’ 53°15’ Niaqornat Tu
Page 93 and 94: Umiivik-1 m Overburden ★ ★ No p
Page 95 and 96: 76). Heavily bioturbated interbedde
Page 97 and 98: Fig. 78. Type locality of the Kussi
Page 99 and 100: A B Itilli Formation Kussinerujuk M
Page 101 and 102: 160 140 120 100 Vaigat Formation Eq
Page 103 and 104: Fig. 85. Mudstones and conglomerati
Page 105 and 106: Fig. 87. Type section of the Kangil
Page 107 and 108: m 150 140 130 120 110 100 90 Kangil
Page 109 and 110: channellised, high-density currents
Page 111 and 112: Thickness. The Annertuneq Conglomer
Page 113 and 114: Fig. 96. A: Type locality of the Oy
Page 115 and 116: On Svartenhuk Halvø, on the east s
Page 117 and 118: Fig. 100. Reference locality of the
Page 119 and 120: Tupaasat Member Atane Formation Fig
Page 121 and 122: ever, have a fluvio-lacustrine orig
Page 123 and 124: etween Tupaasat and Nuuk Qiterleq a
Page 125 and 126: Vaigat Formation sill Quikavsak For
Page 127 and 128:
Fig. 112. The sharp boundary betwee
Page 129 and 130:
Agatdal Formation Eqalulik Formatio
Page 131 and 132:
Fig. 116. Basal conglomerate unit o
Page 133 and 134:
heterolithic deposits of the Kangil
Page 135 and 136:
GANE#1 Vaigat Fm Anaanaa Mb m Hyalo
Page 137 and 138:
Fig. 121. Well reference section of
Page 139 and 140:
Pedersen 1978). The beds are usuall
Page 141 and 142:
In detail, however, the boundary be
Page 143 and 144:
Fig. 126. Composite type section of
Page 145 and 146:
m m 240 340 m Pingu Member 230 230
Page 147 and 148:
Naujât Member Atane Formation, Kin
Page 149 and 150:
The TOC [Total Organic Carbon] cont
Page 151 and 152:
Fig. 133. Correlation of the member
Page 153 and 154:
Fig. 135. Type locality of the Ping
Page 155 and 156:
Fig. 137. Lower, sharp boundary of
Page 157 and 158:
m 130 125 110 t t invasive lava low
Page 159 and 160:
Fig. 141. Upper part of the Assoq M
Page 161 and 162:
Brown, R. 1875: Geological notes on
Page 163 and 164:
a rosetted spreite trace fossil: Da
Page 165 and 166:
ing bark from the Nûgssuaq peninsu
Page 167 and 168:
1998: The syn-volcanic Naajaat lake
Page 169 and 170:
Appendix: Place names and localitie
Page 171:
Place name Place name P Paatuut sou
show all

Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?