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In August, 1998 and July, 2000, helicopter geophysical surveys were carried out over an area of about 560 km2 immediately west of Hurdalssjøen and the Garder- moen airport. The purpose of the surveys was to provide geophysical informa- tion for improved geological mapping. The data were collected by The Geological Survey of Norway (NGU) personnel and processed at NGU. A combined total of 2780 line-km of VLF, radiometric, and magnetic data were acquired using a nominal 200-m line spacing.
Ïn December, 2000 and March, 2001, helicopter geophysical surveys were flown over three areas in the vicinity of Østersund, central Sweden. The purpose of the surveys was to provide geophysical information for mineral exploration. The data were collected and processed by The Geological Survey of Norway (NGU). A combined total of about 2830 line-km of electromagnetic (EM), very low fre- quency EM (VLF), radiometric, and magnetic data were acquired using a nominal 200-m line spacing.
In June, 2001, a helicopter geophysical survey was flown over an area in the vicinity of Storsjö, central Sweden. The purpose of the survey was to provide geophysical information for mineral exploration. The data were collected and processed by Geological Survey of Norway (NGU). A combined total of about 1690 line-km of magnetic, very low frequency EM (VLF), and radiometric data were acquired using a nominal 150 m line spacing.
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