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Rock Magnetism and Dike Classification
David W. Strangway
The Journal of Geology
Vol. 72, No. 5 (Sep., 1964), pp. 648-663
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/30059256
Page Count: 16
You can always find the topics here!Topics: Precambrian supereon, Magnetism, Rocks, Magnetization, Remanent magnetism, Geology, Magnetic polarity, Olivine, Magnetic fields, Magnets
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It is shown in this paper that it is possible to use remanent magnetism as a tool for geologic classification, Several suites of diabase dikes from Ontario and Quebec were sampled and widely differing magnetic properties found. It is shown that the direction of remanent magnetization, as well as the intensity, forms separate and distinct criteria for distinguishing between swarms. An earlier paper indicated that the direction of stable remanent magnetization is distorted by the shape of the dike. In spite of this distortion, widely differing directions of remanent magnetization indicate that the magnetic field of the earth existed in Precambrian times and that it wandered considerably in that era.
The Journal of Geology © 1964 The University of Chicago Press