The Brunswick #12 mine is an underground lead-zinc-copper mine in the Bathurst Mining Camp of northern New Brunswick, Canada. It was discovered in January, 1953 and entered production in April, 1964. The Brunswick #12 orebody is the largest deposit in the Bathurst area and was one of the largest underground zinc mines in the world[1] well into the late 1990s. The mine was officially closed at the end of April, 2013.[2]