AEM 1994-1998 Surveys

The AEM Greenland 19941998 are detailed surveys with combined electromagnetic and magnetic measurements that were carried out within a collaboration between GEUS/GGU and the Greenland Government in six selected areas of expected high mineral potential in Greenland. In total, 75 000 line km covering an area of 23 000 km² were measured in the project. Line spacing was 200 400 m (inline direction) and flight altitudes were typically around 120 m. With exception of one survey the collected electromagnetic data were time-domain data (GEOTEM system).

Date (Creation): 2020-02-20

Identifier: dk.geus: / aem_1994_1998_surveys

Presentation form: Digital map

Purpose: The project was initiated and designed to encourage mineral exploration at that time. Presented maps are based on data processed by GEUS.

Status: Completed

Point of contact

Geological Survey of Denmark and Greenland (GEUS) - Björn H. Heincke

Oster Voldgade 10 , Copenhagen , 1350 K , Denmark

Custodian

Geological Survey of Denmark and Greenland (GEUS) - Simun Olsen Dalsenni

Maintenance and update frequency: As needed

GEMET - INSPIRE themes, version 1.0

Geology

Keywords

Total magnetic intensity
Aeromagnetic

Continents, countries, sea regions of the world.

Greenland

Access constraints: Copyright

Use constraints: Copyright

Other constraints: No limitations on public access

Other constraints: Conditions for Re-use of data https://data.geus.dk/geusmap/terms_20140620.pdf

Spatial representation type: Grid

Denominator: 200000

Distance: 100 m

Metadata language: English

Topic category

Geoscientific information

Reference system identifier: EPSG / https://epsg.io/32624

Geometric object type: Surface

Distribution format

Web Service ( 1.0 )

Distributor

Geological Survey of Denmark and Greenland (GEUS) - Christian Brogaard Pedersen

Oster Voldgade 10 , Copenhagen , 1350 K , Denmark

OnLine resource: Interactive map ( WWW:LINK-1.0-http--link )
Greenland Portal

OnLine resource: Web page ( WWW:LINK-1.0-http--link )
Geophysical mapping info page

OnLine resource: Web Service ( OGC:WMS-1.3.0-http-get-capabilities )
Geophysics magnetic AEM compilation

Hierarchy level: Dataset

Conformance result

Date (Publication): 2010-12-08

Explanation: This field has no significance

Pass: No

Statement: Due to the dense line spacing (200 - 400 m) and low altitudes, the magnetic datasets have generally high resolution. However, the quality of the processing is variable and some of the resulting magnetic datasets show remaining leveling artefacts in the higher order derivatives (status: Feb 2020). For these datasets re-processing is recommended. The time-domain electromagnetic were acquired with a system from the 90s, whose data quality and resolution is not comparable with the ones of modern systems. In one of the surveys (AEM96), also radiometric, VLF and frequency domain data were collected. The quality of the radiometric data is poor and options for reprocessing are lacking because the spectral raw data are not available