Bunker Hill Mine
The Bunker Hill Mine is near Unionville, Montana. Historically the site has been associated with the Rimini Mining District which is now part of the Deerlodge National Forest. The Bunker Hill Mine was closed at the time of data entry with no known plans to re-open. Production size when active was considered to be small. Mine operations consist of 2 distinct underground workings. There is one known shaft. Subsurface depth reaches a maximum of 300 meters (984 feet) and extends 366 meters (1,200 feet) in length. The ore mined is composed of gold, galena and sphalerite with waste material consisting primarily of quartz, sericite and tourmaline. The ore body extends 609 meters (2,000 feet) long and 1 meters (4 feet) wide. Associated rock in this area is quartz monzonite from the Upper Cretaceous epoch 100.50 to 66.00 million years ago. The Northern Rocky Mountains physiographic province of the Rocky Mountain System characterize the geomorphology of the surrounding area.
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E SIDE OF TENMILE CREEK.; INFO FROM LAND. ST : (1950).
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3 ADIT DRIFTS,
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PRODUCTION WAS RECORDED IN 1942
GRADES FROM 701, PRODUCTION STATISTICS TONNAGES ESTIMATED BY INVESTIGATOR DATA ARE SUPPORTED IN REPORTS IN BACKUP F.
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S. P. Bassett Gold Prospect
S. P. Bassett Lead Occurrence
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
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ADIT NO. 1 IS THE LOWES, THE VEIN IS 3 FEET OR LESS IN WIDTH BOUNDED BY PARALLEL JOINTS; ADIT NO. 2 LESS CONTINUOUS CONTROLLING JOINTS, IT HAS 2 QUARTZ-TOURMALINE VEINS 1-5 FEET IN WIDTH. THIS VEIN ZONE SEEMS TO HAVE BEEN A CHANNEL WAY FOR HYDROTHERMAL SOLUTIONS. ADIT NO. 3 HAS SEVERAL BRANCHES WHICH CONTINUE EAST BUT THE DIP FLATTENS.