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TitleMorewood Ontario aeromagnetic calibration range
AuthorKiss, F
SourceGeological Survey of Canada, Open File 7969, 2015, 8 pages,
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf; rtf
Lat/Long WENS-75.5000 -75.0000 45.2500 45.0000
Subjectsgeophysics; magnetic surveys; geophysical surveys; magnetic surveys, airborne; aeromagnetic surveys; aeromagnetic interpretation; data collections; calibration
Illustrationslocation maps; plots; tables; graphs
ProgramRae Province Project Management, GEM2: Geo-mapping for Energy and Minerals
LinksGeoscience Data Repository, survey data
LinksEntrepôt de données géoscientifiques, données de lévé
Released2015 12 14
AbstractAn aeromagnetic calibration range has been established at Morewood, Ontario. The range is in close proximity to the Ottawa, Ontario geomagnetic observatory and in an area of low magnetic gradient. An airborne survey of the range was flown under contract to Natural Resources Canada by Geo Data Solutions Inc. of Montreal, Quebec. The survey consisted of traverses with a calibrated aircraft flown at a series of heights along the four cardinal directions. Magnetic data were acquired that profile the magnetic field above the traverse intersection point. From these airborne magnetic data and the magnetic diurnal variation data from the geomagnetic observatory, a magnetic offset constant between the Morewood site and the observatory was established at a height of 1500 ft. (457.2 m) above the site. Aeromagnetic survey aircraft acquire data over the range, remove the diurnal variation determined from geomagnetic observatory data, and apply the offset constant to calculate the aircraft's magnetic error.
Summary(Plain Language Summary, not published)
1) Aeromagnetic surveys measure the total intensity of the Earth¿s magnetic field. The field was measured by a magnetometer aboard an aircraft flown at 150 m altitude in parallel lines spaced at 400 m across the survey area. The magnetic field reflects magnetic properties of bedrock and provides qualitative and quantitative information used in geological mapping. Understanding the geology will help geologists map the area, assist mineral/hydrocarbon exploration activities, and provide useful information necessary for communities, aboriginal associations, and government to make land use decisions. This survey was flown to improve our knowledge of the area. It will support ongoing geological mapping and resource assessment.