Open AccessAeromagnetic maps of parts of southern and central West Greenland: acquisition, compilation and general analysis of data
Author(s) -
L Thorning
Publication year - 1984
Publication title -
rapport
Language(s) - English
Resource type - Journals
eISSN - 2597-2944
pISSN - 0418-6559
DOI - 10.34194/rapggu.v122.7877
Subject(s) - lineament , geology , aeromagnetic survey , contour line , geologic map , geodesy , levelling , magnetic anomaly , seismology , tectonics , cartography , geomorphology , geophysics , geography , magnetic field , physics , quantum mechanics
Approximately 52 000 line km of aeromagnetic data were acquired in 1975 and 1976. The data are mainly compiled from six survey areas between 64°N and 68°15'N, and from reconnaissance lines flown over several regions of West Greenland between 62°30'N and 72°N. The compilation involved editing and cleaning of data, first order correction of diurnal variation by use of a filtered base station magnetic fieid, further magnetic levelling using tie lines, and finally gridding of data. From the gridded data a coloured contour map has been produced at a scale of 1:500 000 together with black and white contoured maps at 1:250000. The report contains a general discusion of the major anomalies. The major elements in the discusssion are the relationships between the aeromagnetic field and geological features such as metamorphic facies boundaries, lithological units and structural lineaments.