00000000cem 2200000zi 4500
0019.961034
003CaOODSP
00520260424100921
006m     o  c f      
007cr cn|||||||||
007aj cznzn
008260317t20162016oncb   cc a  fo 0   eng d
0341 |aa|b7500000|dW1413000|eW0200000|fN0900000|gN0410000
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|afre
043 |an-cn---
0861 |aM183-2/7878-PDF
1102 |aGeological Survey of Canada.|ecartographer, |eissuing body.
24510|aFirst vertical derivative of magnetic anomalies map, Canada = |bCarte des anomalies de la dérivée première verticale du champ magnétique, Canada.
24611|aCarte des anomalies de la dérivée première verticale du champ magnétique, Canada
255 |aScale 1:7,500,000 ; |bLambert conformal conic projection |c(W 141°30'--W 20°00'/N 90°00'--N 41°00').
264 1|aOttawa, Ontario : |bGeological Survey of Canada = Commission géologique du Canada, |c2016.
264 4|c©2016
300 |a1 online resource (1 map) : |bcolour.
336 |acartographic image|bcri|2rdacontent
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aOpen file = |aDossier public ; |v7878
500 |aRelief shown by shading.
500 |aIncludes text and inset map.
500 |a"Authors: W. Miles and D. Oneschuk."
500 |a"North American Datum, 1983."
504 |aIncludes bibliographical references.
5203 |a"The first vertical derivative of magnetic anomalies map of Canada shows small variations in the magnetic field. The derivative is calculated from the residual magnetic field and enhances the short wavelength component of the field. 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.
546 |aText in English and French.
650 0|aMagnetic anomalies|zCanada|vMaps.
650 0|aGeomagnetism|zCanada|vMaps.
655 7|aGeological maps|2lcgft
655 7|aDigital maps|2lcgft
655 7|aMaps|2lcgft
7001 |aMiles, W. F., |eauthor.
7001 |aOneschuk, Douglas, |eauthor.
788 |tFirst vertical derivative of magnetic anomalies map, Canada = |efre|w(CaOODSP)9.961035
830#0|aOpen file (Geological Survey of Canada)|v7878.|w(CaOODSP)9.832719
85640|qPDF|s25.20 MB|uhttps://publications.gc.ca/collections/collection_2026/rncan-nrcan/m183-2/M183-2-7878.pdf
8564 |qHTML|sN/A|uhttps://doi.org/10.4095/297338