Mammoth Mine
Pony, Montana
45.6669°N 112.0125°W
Mine Overview
The Mammoth Mine is near Pony, Montana. Historically the site has been associated with the South Boulder Mining District which is now part of the Beaverhead National Forest. The site was first discovered in 1870. The Mammoth 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 underground workings. There is one known shaft. Subsurface depth reaches a maximum of 305 meters (1,000 feet) and extends 5,486 meters (18,000 feet) in length. The ore mined is composed of chalcopyrite, sphalerite and galena. The ore body has a lenticular or lens shaped form extending 91 meters (300 feet) long and 6 meters (20 feet) wide. Associated rock in this area is schist 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.
Mammoth Mine Near Pony, Montana
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Owner Name and Address
Edmond Walter
Mammoth Mines Corporation
Twin Bridges, Montana- Type
- Owner
Commodities
Additional textual information about a site or mine.
- Commodity Type Importance
- Copper Metallic Primary
- Gold Metallic Primary
- Silver Metallic Primary
Development
FULLY EQUIPPED MINE; ORE SHOOTS TEND TO TERMINATE ABRUPTLY.
Workings
Workings at the site.
Underground Workings #1
- Type: Underground
- Sub Surface Length: 5486.4 Meters
- Sub Surface Depth: 304.8 Meters
Workings
18000 FEET OF ADITS AND CROSSCUTS ON 5 LEVELS; 2 SHAFTS, 175 AND 150 FEET DEEP. (1935).
Concentration Process
Processes that concentrated or enriched the mineralization of the mine.
- Concentration Process
- Secondary Enrichment In Upper Zone
Orebody
Characteristics of the ore body.
- Length:
- Width: 6.10 meters (20.01 feet)
- Strike: east - west
- Dip: 60 south
Rocks
Geological materials at the site.
- Class? 1st Order Name? 2nd Order Name? 3rd Order Name? 4th Order Name? Most Specific Name? Begin Time End Time Description?
- Associated Rock Metamorphic Rock Schist - - Schist Upper Cretaceous Upper Cretaceous -
- Associated Rock Tobacco Root Batholith-Quartz Monzonite Metamorphic Rock Gneiss - Gneiss - - -
- Host Rock Metamorphic Rock Schist - - Schist - - -
- Host Rock Pony Formation, Gneiss, And Schist Metamorphic Rock Gneiss - Gneiss - - -
- Mineralization - - - - - Paleocene Paleocene -
Structure
Geologic structural features affecting or characterizing the site or mine.
- Scale Description
- Local Mammoth Fault Trends N45w, 70s
Physiography
Physiographic area where the resource is found.
- Division Province? Section
- Rocky Mountain System Northern Rocky Mountains -
Environmental Factors
ONE DISCHARGING ADIT WAS IDENTIFIED AT THE SITE. THE DISCHARGE SEEPED INTO WASTE ROCK PRIOR TO REACHING SURFACE WATER. A SAMPLE OF THIS DISCHARGE HAD A PH OF 7. 45. NO MAXIMUM CONTAMINANT LEVELS WERE EXCEEDED IN THE ADIT DISCHARGE. AN UNNAMED TRIBUTARY FLOWED THROUGH THE SITE AND DISCHARGED INTO THE SOUTH BOULDER RIVER. OBSERVED RELEASES TO THE SOUTH BOULDER RIVER (SEDIMENT) WERE DOCUMENTED FOR ARSENIC AND COPPER. POTENTIAL SAFETY HAZARDS IDENTIFIED AT THE SITE INCLUDED ONE OPEN SHAFT AND TWO OPEN ADITS.
Ore Control
Controls on emplacement of ore such as faults or other structural features.
- Text?
- Fissure Intersections, Falt Zone
Nearby Deposits
Other deposits in the same region.
-
Mountain Boy Mine
- Gold commodity Site type Occurrence status
- Madison, Montana
- Vein
- 0.64 miles
-
Bonanza Gold Mine
- Gold commodity Site type Occurrence status
- Madison, Montana
- Vein
- 1.06 miles
-
South Boulder River Placer
- Gold commodity Site type Mine status
- Madison, Montana
- Placer
- 1.13 miles
-
South Boulder River Placer
- Gold commodity Site type Mine status
- Madison, Montana
- Placer
- 1.46 miles
-
Highland Mary Prospect
- Gold commodity Site type Occurrence status
- Madison, Montana
- Vein
- 1.55 miles
-
Atlantic And Pacific Mine
- Gold commodity Site type Mine status
- Madison, Montana
- Surface And Underground
- 1.87 miles
-
Viking Mine
- Gold commodity Site type Mine status
- Madison, Montana
- Underground
- 2.00 miles
-
Unnamed Gold Mine
- Gold commodity Site type Prospect status
- Madison, Montana
- Surface And Underground
- 2.04 miles
-
Ben Harrison Fraction Mine
- Gold commodity Site type Mine status
- Madison, Montana
- Underground
- 2.14 miles
-
Bozeman Gold Mine
- Gold commodity Site type Mine status
- Madison, Montana
- Underground
- 2.15 miles
Nearby Places
- Pony (5.66 miles away)
- Waterloo (9.39 miles away)
- Harrison (11.10 miles away)
- Silver Star (13.08 miles away)
- Cardwell (13.64 miles away)
- Whitehall (14.63 miles away)
- Sappington (14.71 miles away)
- Norris (16.92 miles away)
- Sheridan (17.09 miles away)
- Twin Bridges (17.52 miles away)
- McAllister (20.45 miles away)
- Alder (24.14 miles away)
Nearby Mining Districts
- South Boulder Mining District (0 miles away)
- Pony-Antelope Creek Mining District (1.63 miles away)
- Whitehall-Renova Mining District (2.95 miles away)
- Tidal Wave Mining District (3.14 miles away)
- Potosi Mining District (4.30 miles away)
Nearby Lands
- Deerlodge National Forest (0 miles away)
- Beaverhead National Forest (1.88 miles away)
Footnotes
* 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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Deposit
TWO MINERAL ZONES: EAST SHOOT (MOST PRODUCTIVE ), AND WEST SHOOT, (SEE TANSLEY, 1933).
PROPERTY COULD BE USGS GSC ID# WO13407 AS LISTED IN MILS. SO MAS PROPERITES 0300570564 AND 0300570794, THE LAT/LONG OF THESE OTHER PROPERTIES ARE CLOSE ENOUGH TO CAUSE SOME CONFUSION.