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Draft Copy 30/5 2005 Thematic maps and data of North and North East Greenland: geology, mineral occurrences and hydrocarbons Draft copy 30/5 2005 G E U S 2 1. Abstract 5 2. Introduction 6 2.1 Geographical area...................................................................................................6 2.2 Limitations ...............................................................................................................6 3. Digital topographic data 8 3.1 Introduction .............................................................................................................8 3.2 History .....................................................................................................................8 3.3 Coverage, origin and description of topographic data .............................................9 3.4 Place names .........................................................................................................12 4. Digital geological maps 14 4.1 Data sources .........................................................................................................14 4.2 Map at target scale of 1:250 000...........................................................................14 4.3 Synoptic maps.......................................................................................................16 4.4 Source maps .........................................................................................................16 4.5 Datasheet presentation .........................................................................................19 5. Mineral occurrences 20 5.1 Introduction ...........................................................................................................20 5.2 Mineral exploration ................................................................................................20 5.3 Data sources .........................................................................................................21 5.4 Datasheet presentation .........................................................................................22 6. Geochemical data 24 6.1 Data sources .........................................................................................................24 7. Geophysical data 28 7.1 Introduction ...........................................................................................................28 7.2 Gravimetric data....................................................................................................30 7.3 Magnetic data from reconnaissance surveys ........................................................31 7.4 Magnetic and electromagnetic surveys from combined surveys ...........................31 7.5 Hyperspectral data ................................................................................................33 8. Geological sites of special hydrocarbon interest 35 8.1 Introduction ...........................................................................................................35 8.2 Data sources .........................................................................................................35 8.3 Site selection.........................................................................................................35 8.4 Datasheet presentation .........................................................................................36 G E U S 3 9. Geological sites of special scientific interest 37 9.1 Introduction ...........................................................................................................37 9.2 Data sources .........................................................................................................37 9.3 Site selection.........................................................................................................37 9.4 Datasheet presentation .........................................................................................38 10. Data specifications and GIS application 41 10.1 DVD contents ........................................................................................................41 10.2 Data.......................................................................................................................41 10.3 GIS-application......................................................................................................43 11. Conclusions and recommendations 44 12. Acknowledgements 46 13. References 47 14. Availability 50 G E U S 4 1. Abstract In August 2002, the Greenlandic Parliament endorsed a Strategy plan for the National Park in North and Northeast Greenland and the Scoresby Sund area (Grønlands Hjemmestyre 2004). The data compilation for this plan required a reliable and homogenous digital topog- raphic map, as well as data on geology, biology and archaeology compiled in thematic maps. A project was therefore launched in the spring of 2004 to compile the latter data. The present report outlines the various thematic subjects that have been compiled, and examples of these elements are shown in the report. The thematic subjects include a pres- entation of a geological map at a scale of 1: 250 000, a description of geological sites of special scientific interest, geological sites of special hydrocarbon interest, selected mineral occurrences, and geophysical and geochemical data. The actual data files for the various thematic subjects are compiled on the enclosed DVD. The DVD is for users with an ArcView GIS and/or MapInfo software licence. It should be noted that the aim of the present project has been to identify specific geological sites or localities that have particular scientific or economic significance, or at least are rep- resentative of a suite of localities, or a swathe of countryside, that are noteworthy for eco- nomic or scientific reasons. The project has therefore focused on compiling and presenting data on a selected and representative part of known occurrences of geologically interesting localities in the National Park and the Scoresby Sund area. Thorough and detailed work has been done to compile and homogenise existing data – but it should nevertheless be kept in mind that future field and reconnaissance studies in the vast area of the National Park may provide new information on hitherto unknown occurrences of geological and min- eralogical significance. G E U S 5 2. Introduction In August 2002, the Greenlandic Parliament endorsed a Strategy plan for the National Park in North and Northeast Greenland and the Scoresby Sund area (Grønlands Hjemmestyre 2004). This plan, which was published in 2004, outlined the need for a reliable and ho- mogenous digital topographic map, as well as a database containing data on geology, biol- ogy and archaeology compiled in thematic maps. A project was therefore launched in the spring of 2004 to compile the dataset for this map and the project was financed by by the Danish Co-operation for Environment in the Arctic, Ministry of the Environment (DANCEA) The data compilation for this plan required a reliable and homogenous digital topographic map as well as data on geology, biology and archaeology presented in thematic maps. A project financed by the Danish Co-operation for Environment in the Arctic, Ministry of the Environment (DANCEA), was therefore launched in the spring of 2004 to first compile the data set for the topographic map. This report outlines the work undertaken to compile and homogenise existing geological data into thematic themes, and examples of these themes are shown in the report. The thematic subjects include a presentation of a geological map at a scale of 1: 250 000, de- scriptions of geological sites of special scientific interest, geological sites of special hydro- carbon interest, selected mineral occurrences, and geophysical and geochemical data. The actual data on the various thematic subjects are compiled on the enclosed DVD. The DVD is for users with an ArcView GIS and/or MapInfo software licence. 2.1 Geographical area The project covers an area from 80oN on Greenland’s northwest coast extending eastwards to the northernmost point of Greenland and south to 70oN on the east coast; this comprises roughly half of Greenland’s ice-free land area (Fig. 2.1). Additional data have been included from Washington Land at the north-western extremity of the study area. The area for which a wide array of geological data has been compiled during the present project covers c. 220 000 km2 and includes the National Park of North and Northeast Greenland and the area around Scoresby Sund. The sites and localities included in the GIS presentation under the present project are based on published literature, data files and unpublished reports from the archives of the Geological Survey of Denmark and Green- land, and the localities are described in standardised datasheets. 2.2 Limitations The aim of the project was to compile and present a selected and representative part of known occurrences of geologically and mineralogically interesting localities in the National Park and the Scoresby Sund area. Thorough and detailed work has been done to compile and homogenise existing data. It should nevertheless be kept in mind that future field and G E U S 6 reconnaissance studies in the vast area of the National Park may well provide new informa- tion on hitherto unknown occurrences of geological and mineralogical significance. Fig. 2.1. Map of North and Northeast Greenland showing the study area relative to the Na- tional Park area. G E U S 7 3. Digital topographic data 3.1 Introduction The 2002 strategy
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