Geology
A Geology Unlike Any Other
The Golden Triangle sits on old volcanic rock. About two hundred million years ago, lava moved through the rock, leaving gold, copper, and silver behind. Between eruptions, mud and sand also settled in basins and on the seafloor.
Some deposits are large and low-grade. Others are thin veins of high-grade gold and silver throughout the rock. Eskay Creek formed as layered ore on an old seafloor.
Metals gathered in cracks where rock kept breaking and hot fluids kept moving through the ground.