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

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1000 800 1000 53°10' 53°05' 53°00' 600 Pyramidedal 1000 26 Qaarsutjægerdal 800 600 Turritellakløft Agatkløft ’Sonja lens’ Sill Sø Teltbæk 70°35' ■■ ■■ ■■ ■■ Teltbæk fault Scaphitesnæsen I I I I I I I I I I I I 400701 400702 OA 14 800 17 600 ■■ ■ ■■ Quaternary cover Vaigat Formation Eqalulik Formation Agatdal Formation Kangilia Formation Itilli Formation, Aaffarsuaq Member Atane Formation Intrusion Agatdalen fault 12 400703 Jeepkløft OA 14 Brayakløft 400 Agatdalen 400704 Søndre and Nordre Baculiteskløft ■■ ■■ ■■ ■■ ■■ ■■ ■■ ■■ ■■ ■■ 600 Ice 800 Sea/lake 1000 OA exposure 14 500 Type section (OA) Strike and dip of strata Contour in 53°10' metres 1 km Fig. 113. Geological map of the Agatdalen area. The positions of the four shallow wells drilled by GGU in 1992 (GGU 400701–400704) are shown. Exposures of Oyster–Ammonite Conglomerate Bed (OA) shown with dots. From Dam et al. (2000) based on Rosenkrantz et al. (1974). Turritellakløft is also named Turritelladal on some maps. For location, see Fig. 2. Subsurface strata, here assigned to the Agatdal For - mation, were first cored in the GANE#1 well drilled by grønArctic Energy Inc. at Eqalulik on western Nuussuaq in 1995 (Fig. 65). A thick succession of marine Paleocene sandstones and conglomerates was drilled in 1996 by the GRO#3 exploration well south-east of the Kuussuaq river delta (Figs 9, 65, 67). This succession was referred to the Quikavsak Formation by Christiansen et al. (1999), but is here referred to the Agatdal Formation. Name. The formation is named after the Agatdalen valley on central Nuussuaq. Distribution. Outcrops of the Agatdal Formation are only known from the Agatdalen area (Fig. 113; Dam et al. 2000). From subsurface data (GRO#3, GANE#1 and GANE#1A wells), the formation is known also to be present on western Nuussuaq, west of the Kuugannguaq– Qunnilik Fault. 128
Agatdal Formation Eqalulik Formation ‘Turritellakløft Member’ ‘Andreas Member’ Abraham Member Fig. 114. Type locality of the Agatdal Formation in Turritellakløft (Rosenkrantz 1970; for location, see Fig. 113). The section is approximately 80 m high. In the present paper, the Agatdal Formation is not subdivided, but the formally abandoned ‘Turritellakløft Member’ and ‘Andreas Member’ are shown to provide a link to Rosenkrantz (1970). The Agatdal Formation is overlain by a thin development of the Abraham Member which is part of the Eqalulik Formation. For measured section, see Plate 3 (section 1). The Turritellakløft Member and the Abraham Member of Rosenkrantz (1970) were described from the western end of the Turritellakløft gorge and Qaarsutjægerdal (Figs 113–115, Plate 3; H.J. Hansen 1970), whereas the Andreas Member was only recognised in Turritellakløft (Figs 113, 114, Plate 3). The Sonja Member of Rosen - krantz (1970) is only known from a section in Agatkløft, 2 km east of Turritellakløft (Figs 116, 117, Plate 3). On Svartenhuk Halvø, on the east slope of Firefjeld, a thin (30 m) Paleocene conglomeratic unit is present between the Itilli Formation and the hyaloclastic rocks of the Vaigat Formation (Fig. 73; J.G. Larsen & Pulvertaft 2000). This unit may be correlated with either the Agatdal Formation or the Quikavsak Formation. Type section. The type section of the Agatdal Formation is at the so-called ‘Store Profil’ (or ‘Big Section’) in Turri - tellakløft in the north-western end of Agatdalen (Fig. 114, Plate 3, section 1; Rosenkrantz 1970 fig. 5; Hender - son et al. 1976 fig. 312). The type section is located at 70°35.01´N, 53°08.02´W. Reference sections. Reference sections occur on the southern slopes of Agatkløft and on the eastern slope of Qaar - sutjægerdal (Figs 115, 116, 117, Plate 3). In the subsurface, a complete section through the forma tion was encountered in the GRO#3 well from 718 m to 423 m (Fig. 67). No cores were taken but a complete suite of well logs is available (Kristensen & Dam 1997). The upper part of the Agatdal Formation was drilled and fully cored in the GANE#1A well from 706.7 m to 601.5 m (Fig. 119). Thickness. The formation varies considerably in thickness from 65 m in the type section to 18 m in Qaarsutjægerdal (Plate 3). In the GRO#3 well, the formation is approximately 250 m thick (excluding igneous intrusions; Fig. 67). 129
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GEOLOGICAL SURVEY OF DENMARK AND GR
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Contents Abstract . . . . . . . . .
Page 7 and 8:
Preface The onshore Cretaceous-Pale
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Introduction The Nuussuaq Basin bel
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chemistry of the Nuussuaq Basin hav
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Fig. 5. Plant fossils from the Atan
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Peak 2010 m Peak 1900 m Peak 1760 m
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A lithostratigraphy for the marine
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to provide further funding for stud
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DGR Geological setting As a result
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TSS 8 Agatdal Fm Eqalulik Fm Kangil
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A Svartenhuk Halvø 50 km B Hinterl
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Nuussuaq Group new group History. T
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ley (Figs 2, 40, 65). The section a
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Central Nuussuaq Agatdalen South co
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3 10 4 6 5 Qorlortorssuaq Slibesten
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volcanic sediments are referred to
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Fig. 20. View from Uummannaq toward
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In the Kuuk area, the sediments ove
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m m 15 14 14 13 12 11 10 9 8 7 6 5
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Kome Formation m 40 30 20 D tial re
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Fig. 28. Reference locality of the
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Vaigat Fm Vesterfjeld Slibestensfje
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Gilbert delta in the Ikorfat area (
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150 300 450 100 250 400 m 550 50 20
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Fig. 36. Outcrop of the Upernivik N
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Correlation. The Upernivik Næs flo
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12’ 09’ 15’ 06’ 03’ Saqqa
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m 0 GGU 247801 200 400 247815 ★
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wave-rippled sand streaked mudstone
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the formation in the marine mudston
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d d Fig. 47. Type locality of the S
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Fig. 49. Cross-bedded medium- to co
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and Qaarsut (Fig. 22). Its wider di
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Fig. 52. Two closely spaced section
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Type section. The type section of t
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Fig. 56. Delta front succession of
Page 77 and 78: Fig. 59. The Kingittoq Member at Ki
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: Fig. 112. The sharp boundary betwee
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
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Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

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