Another land away was the land of Heth, where Omer's wicked son, Jared, enticed half the kingdom to join him (SEE Ether 8:2) If the land of Heth proves to be Michigan (where many of the Jaredites of the glacial Kame phase lived, we might wonder if this later, more wicked Jared lured his countrymen into that region by enticing them with promises of great wealth if they worked the copper mines of Michigan's Keweenaw Peninsula.
And they did work in all manner of ore, and they did make gold, and silver, and iron, and brass, and all manner of metals; and they did dig it out of the earth; wherefore they did cast up mighty heaps of earth to get ore, of gold, and of silver, and of iron, and of copper. And they did work all manner of fine work. ETHER 10:23
The Danites were expert in the production of bronze and were no doubt aware of the copper mines of N. America. It would not be surprising to learn that a Danite ship transported Mulek and his royal entourage across the sea to America.