thumbnail

Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska

Journal of Geophysical Research
By:  and 

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS | Dublin Core

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

Additional publication details

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