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Detailed Reference Information |
Geissman, J.W., Gillett, S.L. and Oldow, J.S. (1990). Preliminary paleomagnetic results from the Triassic Prida Formation (lower Star Peak Group), west-central Nevada, and implications for latitudinal displacement. Geophysical Research Letters 17: doi: 10.1029/90GL00825. issn: 0094-8276. |
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Paleomagnetic data were obtained from two oppositely dipping carbonate sections of the Triassic Prida Formation, lower Star Peak Group, in the Humboldt Range of west-central Nevada. Progressive demagnetization of the rocks indicated that the remanent magnetization consists of three or fewer vector components. A characteristic component, with the highest unblocking temperatures, was most effectively isolated by low temperature (200--300 ¿C) thermal followed by progressive alternating field demagnetizatiin. The sections yield in situ mean directions that differ significantly, but that have similar inclinations (Star Canyon: D+311, I=+34, &agr;95=5, k=22, N=38 samples; Fossil Hill: D=281 I=+33, &agr;95=2¿, K=2814, N=3 section means 154 samples). The directions diverge upon simple structural correction, from which we infer that at least one and probably both of the sections were remagnetized, probably in latest Middle to Late Jurassic time. These data cannot be used to indicate significant southward translation of Golconda allochthon rocks, as inferred from magnetization in underlying volcanic rocks. The translation interpretation may require revision if magnetizations in the volcanic rocks are also secondary. ¿ American Geophysical Union 1990 |
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BACKGROUND DATA FILES |
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Abstract![](/images/icons/spacer.gif) |
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Keywords
Geomagnetism and Paleomagnetism, Paleomagnetism applied to tectonics (regional, global), Information Related to Geologic Time, Mesozoic, Information Related to Geographic Region, North America |
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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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