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.
|Title||Potassium-argon and lead-alpha ages of plutonic rocks, Bokan Mountain area, Alaska|
|Authors||M. A. Lanphere, E. M. MacKevett, T. W. Stern|
|Publication Subtype||Journal Article|
|Record Source||USGS Publications Warehouse|