05ba12b3-f40b-4832-9765-16d8ebb745c2 Geological Survey of Denmark and Greenland (GEUS) Oster Voldgade 10 Copenhagen 1350 K Denmark gis-salg@geus.dk 2023-05-10T11:28:01 ISO 19115:2003 / ISO 19139:2007 https://epsg.io/32624 EPSG Element distribution maps of stream sediments samples from the geochemical atlas of West and South Greenland 2022-01-01 element_maps_2001r46 dk.geus: Each map displays a grid image of the variation in element concentration, a colour scale giving class intervals for the grid colours, histograms showing the frequency distributions of sample values and grid cell values, respectively, and statistical parameters for measured concentrations in samples and for the grid cell values. All element concentrations below the lower limit of detection for the analytical method have been set to zero for simplicity, and in accordance with their registration in the GEUS database. Major element oxide concentrations have been recalculated as volatile-free concentrations to compensate for the effect of variable contents of organic matter and carbonate. Stream sediment chemistry reflects chemical variations in rock complexes, and many element distribution patterns can be related to known lithological features. Although the rock exposure rate is generally very high in Greenland, there are inland areas in West Greenland where overburden and vegetation create problems for geological mapping. The geochemical maps helps to outline rock boundaries in such a surface environment. Also where high-grade metamorphism has obscured original textures and boundaries between lithological units, the geochemical maps may contribute valuable information. This is the case in central West Greenland where high-grade Archaean and Palaeoproterozoic gneiss complexes cannot be distinguished in the field. However, the younger gneiss has a strong geochemical signature, which is reflected in the maps of Ba and Sr. Thus an approximate outline of the younger gneiss can be drawn, based on the geochemical data. Several other cases are known from West and South Greenland, where stream sediment geochemical patterns have drawn the attention to rock complexes that had not previously been recognised. The geochemistry of a rock unit, and its trace element signature, in particular, is an important factor in determining its origin. Many trace elements are hosted in scarce, fine-grained minerals in the rocks, e.g. apatite, zircon and monazite. These minerals are resistant to weathering with the effect that their abundance is upgraded in the stream sediments relative to their abundance in the source rocks. Again, because the stream sediment data cover regions with little or no geochemical data on rocks, the stream sediment chemical maps may assist in identifying rock complexes of a certain origin. Geological Survey of Denmark and Greenland (GEUS) Oster Voldgade 10 Copenhagen 1350 K Denmark gis-salg@geus.dk https://data.geus.dk:/geonetwork/srv/api/records/05ba12b3-f40b-4832-9765-16d8ebb745c2/attachments/2023-04-13_12-58-20.jpg Geology Mineral resources GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.place.httpinspireeceuropaeutheme-theme Continents, countries, sea regions of the world. 2015-07-17 geonetwork.thesaurus.external.place.regions No limitations on public access Conditions for Re-use of data http://pubs.geus.net/et_dokument -1 5000 geoscientificInformation -73.057 -11.377 59.793 83.634 geotiff files 0.1 Geological Survey of Denmark and Greenland (GEUS) Oster Voldgade 10 Copenhagen 1350 K Denmark gis-salg@geus.dk https://data.geus.dk/greenlanddb/webresources/dodex-report-file/released-report/17839 WWW:LINK-1.0-http--link Publication A. Steenfelt 2001 Geochemical atlas of Greenland - West and South Greenland. [2 versions: Printed maps included or 1 CD-Rom included] Danmarks og Grønlands Geologiske Undersøgelse Rapport 2001/46. https://data.geus.dk/arcgis/services/GrlPortal/ElementMaps2001R46/MapServer/WMSServer?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities OGC:WMS-1.3.0-http-get-capabilities WMS ElementMaps2001R46 https://maps.greenmin.gl/geusmap/?mapname=greenland_portal_test&lang=en#baslay=baseMapGl&optlay=&layers=element_maps_2001r46 WWW:LINK-1.0-http--link Interactive map Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This field has no significance false Data are based on https://data.geus.dk/geonetwork/srv/eng/catalog.search#/metadata/8abf8aef-e244-4f70-9c48-a455cf4c32ae