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76 Mine, Monte Cristo mining district, Snohomish County, Washington, USAi
| Regional Level Types | |
|---|---|
| 76 Mine | Mine (Abandoned) |
| Monte Cristo mining district | Occurrence |
| Snohomish County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 58' 17'' North , 121° 22' 46'' West
Latitude & Longitude (decimal):
Type:
Mine (Abandoned) - last checked 2021
Köppen climate type:
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 |
|---|---|---|
| Darrington Rock & Gem Club | Darrington, Washington | 36km |
Other/historical names associated with this locality:
Independence of 1776 Mine; 1776 Mine; Seventy Six Mine; '76 Mine
The '76 Mine was the first mine staked in Monte Cristo on July 4, 1889. The mine was officially called the Independence of 1776 Mine, but the miners quickly started calling it the '76. The outcrops of galena and arsenopyrite above the mine were what first drew prospectors to Monte Cristo, since they made the side of Hubbard Peak shine in the sunlight. Some gold was produced from the mine, but it also had high assays of lead. Surface outcrops averaged around 1 oz of gold per ton and 26% lead, although these surface deposits were quickly stripped away by miners. The deposits did not not extend very far into the mountain, which caused the '76 to be one of the first mines in Monte Cristo to close. From the several years of operation less than 1000' of drift was driven on 2 levels. The ore minerals were mainly galena, chalcopyrite, pyrite, arsenopyrite, and sphalerite.
Structure: Shearing
Alteration: Silicification
Tectonics: Cascade Volcanic Arc
Deposit: Sulfide-bearing lenses and veins in fracture zone
Deposit type: Polymetallic veins
Rock formation(s): Barlow Pass Volcanics
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
6 valid minerals. 1 erroneous literature entry.
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 DiagramDetailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite ? | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10036779 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- Cascade ArcVolcanic Arc
- Franciscan DomainDomain
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76 Mine, Monte Cristo mining district, Snohomish County, Washington, USA