00000cem 2200000zi 4500 9.961029 CaOODSP 20260424100838 m o c f cr cn||||||||| aj cznzn 260317t20162016oncb cc a fo 0 eng d a 7500000 W1413000 W0200000 N0900000 N0410000 CaOODSP eng rda CaOODSP eng fre n-cn--- M183-2/7799-PDF Geological Survey of Canada. cartographer, issuing body. Magnetic anomaly map, Canada = Carte des anomalies magnétiques, Canada. Carte des anomalies magnétiques, Canada Scale 1:7,500,000 ; Lambert conformal conic projection (W 141°30'--W 20°00'/N 90°00'--N 41°00'). Ottawa, Ontario : Geological Survey of Canada = Commission géologique du Canada, 2016. ©2016 1 online resource (1 map) : colour. cartographic image cri rdacontent text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file = Dossier public ; 7799 Relief shown by shading. Includes text and inset map. "Authors: W. Miles and D. Oneschuk." "North American Datum, 1983." Includes bibliographical references. "The magnetic anomaly map of Canada shows small variations in the magnetic field that are caused largely by variations in the magnetic properties of Earth's crust. The magnetic character of a rock depends on its composition and its deformational and metamorphic history. To map these variations, the Geological Survey of Canada has been acquiring aeromagnetic data since 1947. Over the years, more than 500 surveys have been carried out, generally with a flight-line spacing of 800 m and an altitude of 305 m above the ground. These aeromagnetic surveys have been levelled to each other to correct for arbitrary datums, slow variations of Earth's magnetic field over time, and differing survey specifications. The dominant structural trends of geological provinces, truncation of those trends at structural boundaries, and the characteristic patterns of suture zones can be recognized on the magnetic anomaly map. The magnetic signature of Precambrian basement rocks can be seen through the Phanerozoic sedimentary basin cover. Major dyke swarms can be traced over hundreds of kilometres from their radiating linear magnetic pattern. Oceanic crust has a characteristic striped magnetic pattern that is due to changes in the polarity of Earth's magnetic field, which occur over intervals of millions of years"--Abstract. Text in English and French. Magnetic anomalies Canada Maps. Geomagnetism Canada Maps. Geological maps lcgft Digital maps lcgft Maps lcgft Miles, W. F., author. Oneschuk, Douglas, author. Magnetic anomaly map, Canada = fre (CaOODSP)9.961032 Open file (Geological Survey of Canada) 7799. (CaOODSP)9.832719 PDF 21.90 MB https://publications.gc.ca/collections/collection_2026/rncan-nrcan/m183-2/M183-2-7799.pdf HTML N/A https://doi.org/10.4095/297337