Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska
Journal of Geophysical Research
By: J. W. Hillhouse and C. S. Grommé
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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
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska |
| Series title | Journal of Geophysical Research |
| Volume | 93 |
| Issue | B10 |
| Year Published | 1988 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Geophysical Research |
| Google Analytic Metrics | Metrics page |