First National and Eighty Four Mines, Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District), Eagle County, Colorado, USAi
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Latitude & Longitude (WGS84):
39° 30' 56'' North , 106° 21' 49'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Red Cliff | 274 (2017) | 0.5km |
| Minturn | 1,026 (2017) | 9.7km |
| Vail | 5,461 (2017) | 13.9km |
| Avon | 6,505 (2017) | 18.7km |
| Copper Mountain | 385 (2011) | 19.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Colorado Gold Camp | Frisco, Colorado | 24km |
Mindat Locality ID:
437358
Long-form identifier:
mindat:1:2:437358:5
GUID (UUID V4):
2568d7dc-053c-43bf-a3c4-13fac3244bf6
As these mines are similar in most respects and are connected, they are described together. Caved crosscuts or water prevented a complete examination of either mine.
The First National is opened by a tunnel which trends N. 10° W. in the limestone. An old map shows two tunnels on the Eighty Four claim, both trending about N. 20° W., but both are caved at the portals. At the time the map was made the First National had 575 feet of development still accessible, and the Eighty Four had 1,080 feet. Very little of the latter mine could be seen. The wall rock is dolomitic "zebra" limestone that carries siderite. The ore occurs as pyrite in all stages of alteration, and limonite in patches and streaks in and near ill-defined fault zones. Pyrite has replaced the wall rock and filled thin, discontinuous fissures.
The report of the Director of the Mint for 1887 gives the value of the output of the Eighty Four for that year as $1,991. In 1915 Dismant Brothers and Company shipped ten lots of ore from the same mine which netted them $4,825. This ore carried 47 to 73 ounces silver per ton, 0.7 to 9.2 per cent lead, and as much as 12 per cent zinc. One lot contained a little copper, and two lots ran .02 ounces gold per ton. The reports of the Director of the Mint give the value of the production from the First National for the years 1888-1891 as $4,359. Both mines have produced more ore than mentioned, but the records are not available.
The First National is opened by a tunnel which trends N. 10° W. in the limestone. An old map shows two tunnels on the Eighty Four claim, both trending about N. 20° W., but both are caved at the portals. At the time the map was made the First National had 575 feet of development still accessible, and the Eighty Four had 1,080 feet. Very little of the latter mine could be seen. The wall rock is dolomitic "zebra" limestone that carries siderite. The ore occurs as pyrite in all stages of alteration, and limonite in patches and streaks in and near ill-defined fault zones. Pyrite has replaced the wall rock and filled thin, discontinuous fissures.
The report of the Director of the Mint for 1887 gives the value of the output of the Eighty Four for that year as $1,991. In 1915 Dismant Brothers and Company shipped ten lots of ore from the same mine which netted them $4,825. This ore carried 47 to 73 ounces silver per ton, 0.7 to 9.2 per cent lead, and as much as 12 per cent zinc. One lot contained a little copper, and two lots ran .02 ounces gold per ton. The reports of the Director of the Mint give the value of the production from the First National for the years 1888-1891 as $4,359. Both mines have produced more ore than mentioned, but the records are not available.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Siderite | FeCO3 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Siderite | FeCO3 |
Other Regions, Features and Areas containing this locality
North America
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Great Plains DomainDomain
USA
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References
