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Detailed Reference Information |
Roy, J.L., Lapointe, P.L. and Anderson, P. (1975). Paleomagnetism of the oldest red beds and the direction of the late aphebian polar wander relative to Laurentia. Geophysical Research Letters 2: doi: 10.1029/GL002i012p00537. issn: 0094-8276. |
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The direction of the apparent polar motion relative to Laurentia for the interval 2.2 1.9 b.y. ago is the subject of a controversy owing to difficulties in determining the age relationships and age of the complex magnetization of those very old rocks. Three cleaning treatments (thermal, chemical and alternating field) were used to study the fossil magnetization of 104 specimens (8 sites) of 2.3 b.y. old red argillites of the Huronian Supergroup. The results indicate that the magnetization was acquired during the initial process of magnetization. The mean direction 337¿, +52¿ (N=8; &agr;95=8¿) yields a pole at 158¿E, 67¿N (Δp=8¿; Δm=11¿). This and other recently published results indicate that the apparent polar motion relative to Laurentia for the 2.3 to 1.9 b.y. ago was mainly latitudinal and from north to south. |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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