| Abstract: | Although Lower Cretaceous volcanogenic rocks of the Yukon-Koyukuk province preserve primary remanent magnetizations, the primary component is masked by a pervasive overprint. The overprinting magnetization which has dual polarity, was acquired after a Late Cretaceous orogeny left the region highly deformed. The primary magnetization corresponds to a mean paleopole of Early Cretaceous age at 60.2??N. 159??E. The mean paleolatitude is 69??N with the 95% confidence ellipse ranging from 60?? to 75??N. We infer that Lower Cretaceous rocks of the Brooks Range and the Yukon-Koyukuk province were once separated by a wide ocean basin that was closed by subduction, probably during the Cretaceous. The northern limb of the Angayucham terrane, which lies between the Brooks Range and the Yukon-Koyukuk province, may contain remnants of the now-closed ocean basin. -from Authors |
| Genre: | Article |
| ProdID: | 70014292 |
| Citation Author: | Hillhouse, J. W.; Gromme, C. S. |
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| Citation Issue: | B10 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Search Results Text: | Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska; 1988; Article; Journal; Journal of Geophysical Research; Hillhouse, J. W.; Gromme, C. S. |
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| Citation Volume: | 93 |
| Citation Year: | 1988 |
| Type: | citation/reference |
| Text: | Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska; 1988; Article; Journal; Journal of Geophysical Research; Hillhouse, J. W.; Gromme, C. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1988 00:00 -0600 |
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