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Abstract

The airborne remote sensing project in East Greenland was executed as a joint effort between the Groupement pour le Developpement de la Teledection Aerospatiale, France, and the Geological Survey of Greenland, Denmark. The project aimed at investigating the applicability of remote sensing in mineral exploration. Data from in total 12,800 sq.km were acquired in the visible and near infrared part (7 channels) and in the thermal infrared part (2 channels) of the spectrum. Three test areas, representing different geological environments and mineralization types, were defined and different image analytical methods were applied to the three areas. In the first area different image processing methods (stretching, principal component transformation, rationing) were accomplished and hard copies of the processed images were analyzed visually. The results include (1) mapping of lithological boundaries which were not present on available geological maps, (2) discovery of new faults and lineaments of which one displaces a mineralized vein while others may indicate new target areas for exploration and (3) localisation of reflectance anomalies, some of which are associated with mineralized veins. In the second area, rationing methods were applied to enhance colour anomalies depicting oxidation zones on the ground. A systematic survey revealed 365 oxidation zones which are obvious targets for future exploration. In the third area, rock classification was attempted as a first approach in localizing stratabound mineralization. However, the classification was only partly successful and no further activity was made on this area.

Additional information

Authors: FAVARD J C CENTRE NAT. D'ETUDES SPATIALES, TOULOUSE SCANVIC J Y BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, ORLEANS (FRANCE) FRIEDMAN A L CHRISTIAN ROVSING A/S, BALLERUP (DENMARK) THYRSTED T GEOLOGICAL SURVEY OF GREENLAND, COPENHAGEN (DENM%, CENTRE NAT. D'ETUDES SPATIALES, TOULOUSE;BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, ORLEANS (FRANCE);CHRISTIAN ROVSING A/S, BALLERUP (DENMARK);GEOLOGICAL SURVEY OF GREENLAND, COPENHAGEN (DENM
Bibliographic Reference: EUR 10334 EN (1986), FS, PP. 81-113, BFR 600, EUROFFICE, LUXEMBOURG, POB 1003
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