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 The main adit to the Andover Mine pictured here in 2007. |
Andover MineThe Andover Mine was opened sometime before 1763, prior to the Revolutionary War. The mine is known for having contained the most extensive deposit of hematite in the state of New Jersey. While predominantly hematite, the ore was intermingled with magnetite. The ore body was between 30 to 60 feet wide and its depth was quite variable. The southern portion of the mine was worked as a large open pit up to 70 feet deep with some underground stoping. The northern end followed the vein completely underground where the magnetite largely replaced the hematite. It is estimated that the total length of the ore mined was about 1200 feet. |
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