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Victoria Mine
Victoria Mine is a series of copper mines located in Rockland Township, Ontonagon County, in Michigan’s Copper Country. It was near this location that a large piece of float copper, also known as the Ontonagon Boulder, was found. The mine operated off and on from 1849 until its final closure in 1921. Most of the metal found there is low grade native copper from the Forest Lode. Quartz, epidote, calcite, prehnite, and pumpellyite are also found in the rock.
==1771-1849==
Prehistoric mining pits indicate that the area was mined long before Europeans ever set foot in North America. Near this area was the location of a large piece of float copper, also known as the Ontonagon Boulder. Originally discovered by missionaries, the boulder sparked the interest of British investors. In 1771, Alexander Henry the elder, an early British explorer, was sent to open a mine along the banks of the Ontonagon River where the boulder had been found. The venture ultimately proved unsuccessful after the adit caved in due to the fact that they were mining into a river bank. After this, the project was abandoned and the site remained empty for the next seventy years.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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