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Potassium-argon and lead-alpha ages of plutonic rocks, Bokan Mountain area, Alaska

January 1, 1964

Most of the granitic rocks in the Bokan Mountain area, southeastern Alaska, are early Paleozoic (probably Ordovician) judged by potassium-argon and lead-alpha age measurements. The Bokan Mountain Granite, the youngest intrusive unit in the area, belongs to a Mesozoic plutonic episode. These age measurements are the first direct evidence for the emplacement of early Paleozoic granitic intrusive rocks close to the Pacific margin of North America.

Citation Information

Publication Year 1964
Title Potassium-argon and lead-alpha ages of plutonic rocks, Bokan Mountain area, Alaska
DOI
Authors M. A. Lanphere, E. M. MacKevett, T. W. Stern
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Series Number
Index ID 70010833
Record Source USGS Publications Warehouse
USGS Organization