Ethel Mine, Index Mining District, Snohomish County, Washington, USAi
| Regional Level Types | |
|---|---|
| Ethel Mine | Mine |
| Index Mining District | Mining District |
| Snohomish County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 52' 15'' North , 121° 29' 42'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen 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 | 43km |
Mindat Locality ID:
15910
Long-form identifier:
mindat:1:2:15910:5
GUID (UUID V4):
197d8760-82da-4d40-a63d-60cc768d9ae1
The Ethel Mine was originally staked around the turn of the century and closed around 1920. It worked a shear zone in granodiorite from a few inches to 27' in width. The primary ore minerals were Bornite and Chalcopyrite, and the mine averaged around 4% Cu. It assayed as high as 77 oz of silver per ton and over 50% Copper, although these assays must have been taken from very narrow seams of pure Bornite. The high assays caused a rush of investors and the quick development of the mine even though the ore shortly pinched out at depth. The mine was developed by 4 adits consisting of 3200' of tunnel, and was equipped with a 80 ton pelton wheel-powered mill, electric lighting plant, and aerial tramway. It produced 400 only tons of ore from 20 years of on and off mining. There were attempts to re-open the mine during the second world war but this did not succeed.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Bornite Formula: Cu5FeS4 References: |
| β Calcite Formula: CaCO3 References: |
| β Chalcocite Formula: Cu2S References: |
| β Chalcopyrite Formula: CuFeS2 References: |
| β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) Habit: sprays and individual crystals over 1" long Colour: shining green |
| β Fluorite Formula: CaF2 References: |
| β Pyrite Formula: FeS2 References: |
| β Quartz Formula: SiO2 Colour: clear Description: some with green epidote phantoms References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcocite | 2.BA.05 | Cu2S |
| β | Bornite | 2.BA.15 | Cu5FeS4 |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| β | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | β Quartz | SiO2 |
| F | Fluorine | |
| F | β Fluorite | CaF2 |
| Al | Aluminium | |
| Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Bornite | Cu5FeS4 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Chalcocite | Cu2S |
| S | β Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | β Fluorite | CaF2 |
| Fe | Iron | |
| Fe | β Bornite | Cu5FeS4 |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Bornite | Cu5FeS4 |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Chalcocite | Cu2S |
Other Regions, Features and Areas containing this locality
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References
