Geological map of Greenland 1:100 000 Qaanaaq 77 V.1 Syd

Version 1.0
Dawes, Peter R., 2025, "Geological map of Greenland 1:100 000 Qaanaaq 77 V.1 Syd", https://doi.org/10.22008/FK2/BCPTAU, GEUS Dataverse, V1
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Description
Geology is based on field work by Peter R. Dawes in 1971, 1974, 1975 and 1978. Compiled with photointerpretation 1988–89, with local revision based on field work in 2001. The coast was surveyed by boat with sporadic foot traverses, aided by helicopter in 1978 and 2001.

GIS compilation: Katja T. Walentin, Samuel P. Jackson and Eva Willerslev.

Cross section: Martin Sønderholm.

Editorial handling: Thomas F. Kokfelt and Martin Sønderholm.

Reviewed by John Grocott (Durham University, United Kingdom) and Marc R. St-Onge (Geological Survey of Canada).

Detailed information on the map units is available in the GEUS Greenland Intrusive and Stratigraphic Database using the GU-codes shown in brackets in the legend (https://doi.org/10.22008/FK2/F9MBNJ). Information on mineral occurrences is available in the Greenland Mineral Resources Portal (https://www.greenmin.gl).

Topographic base: Geodetic Institute maps at 1:200 000 from 1954 with major revision of the ice margin and glaciers based on 1:150 000 aerial photographs from 1985–1987 and Sentinel 2 satellite imagery from 2019. All heights are in metres. Additional lake heights are from The Danish Agency for Data Supply and Infrastructure (now The Danish Agency for Climate Data): Højdemodel Grønland (https://dataforsyningen.dk/data/4780, accessed September 2023). Ground exposed by ice retreat since initial compilation in 1988–1989 is identified in the legend. 1949 ice margins are from Geodetic Institute maps. Ice margins recorded in 1922 during Lauge Koch's expedition are approximate. Additional ice margins for Berlingske Bræ after Dawes & van As (2010). Ice altimetry and thickness are based on data from Morlighem et al. (2017), bathymetry is from Morlighem et al. (2022). Landslides are modified from GEUS internal data; for methodology see Svennevig (2019). Authorised place names are from Oqaasileriffik (The Language Secretariat of Greenland), with supplementary names from Laursen (1972).

Projection: WGS 84 UTM Zone 20N.

Copyright © Geological Survey of Denmark and Greenland.

References:

Dawes, P.R. 1997: The Proterozoic Thule Supergroup, Greenland and Canada: history, lithostratigraphy and development. Geology of Greenland Survey Bulletin 174, 150 pp. https://doi.org/10.34194/ggub.v174.5025

Dawes, P.R. 2006: Explanatory notes to the Geological map of Greenland, 1:500 000, Thule, Sheet 5. Geological Survey of Denmark and Greenland Map Series 2, 97 pp. + map sheet. https://doi.org/10.34194/geusm.v2.4614

Dawes, P.R. & van As, D. 2010: An advancing glacier in a recessive ice regime: Berlingske Bræ, North-West Greenland. Geological Survey of Denmark and Greenland Bulletin 20, 79–82. https://doi.org/10.34194/geusb.v20.4986

Laursen, D. 1972: The place names of North Greenland. Meddelelser om Grønland 180(2), 443 pp. + 18 plates.

Morlighem, M. et al. 2017: BedMachine v3 [Surface; Thickness]: Complete bed topography and ocean bathymetry mapping of Greenland from multibeam echo sounding combined with mass conservation. Geophysical Research Letters 44, 11051–11061. https://doi.org/10.1002/2017GL074954

Morlighem, M. et al. 2022: IceBridge BedMachine Greenland, Version 5 [Bed]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/GMEVBWFLWA7X (accessed January 2024).

Svennevig, K. 2019: Preliminary landslide mapping in Greenland. Geological Survey of Denmark and Greenland Bulletin 43, e2019430207. https://doi.org/10.34194/GEUSB-201943-02-07

Thomassen, B., Krebs, J.D. & Dawes, P.R. 2002: Qaanaaq 2001: mineral exploration in the Olrik Fjord – Kap Alexander region, North-West Greenland. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2002/86, 72 pp. + map. https://doi.org/10.22008/gpub/18491
Subject Earth and Environmental Sciences
Keyword Geology - maps
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