Excerpt from Pogo Mine

The Pogo deposit is Alaska’s largest producing gold mine. It is underlain by high-grade gneisses of the Late Proterozoic to mid-Paleozoic Yukon-Tanana terrane, which have been intruded by granitoid bodies, mostly belonging to a voluminous mid-Cretaceous suite. The Yukon-Tanana terrane and Cretaceous intrusions extend from west of Fairbanks through the central Yukon, for a distance of over 700 kilometres.

Excerpt from AIX NR

In the present program, the inclined drillhole was northeast-oriented, designed to intersect a northwest-trending fabric at depth that was identified after re-assessment of geophysical data for the West Pogo property. After passing through 44 meters (144 ft.) of mostly paragneiss, the drill encountered metagranite with sericite-altered, iron-stained zones of brecciation and veining with arsenopyrite or pyrite that appear to increase with depth to the end of the hole at 321 meters (1,055 ft.).