Alder Mine, Twisp Mining District, Okanogan County, Washington, USAi
| Regional Level Types | |
|---|---|
| Alder Mine | Mine |
| Twisp Mining District | Mining District |
| Okanogan County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
48° 19' 19'' North , 120° 9' 27'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
One of the largest producing mines in Okanogan County. The Alder primarily produced gold with values in silver and copper. Development consisted of several hundred feet of workings, a 300 ton flotation mill, and an open pit. It produced over 25,000 tons of ore from 1937-1953. Once being one of the best preserved historic mines in the state, most of the historic features have since been destroyed by reclamation.
Structure: There Is A North-South Regional Structural Trend South Fault Cuts Off Ore Zone.
Alteration: Silicification, Chloritization, Sericitization
Tectonics: Cascade Volcanic Arc
Commodity: Au and Ag are enriched 2 oz/ton in cu concentrates made in mill tests.
Deposit: At depth are massvie stringers of chalcopyrite and sphalerite
Deposit type: Massive sulfide, kuroko
Development: Exploration in 1977, 1979, and 1990. Complex low-grade ore must be concentrated before sold.
Geology: Veins in deposit have no relation with the alder creek stock
Rock formation(s): Newby Group;Newby Group
Ore(s): Deposit Is Stratabound
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
11 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 DiagramDetailed Mineral List:
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 Habit: crusts Colour: bright blue References: |
| ⓘ Chalcanthite Formula: CuSO4 · 5H2O Habit: large crusts Colour: pale blue References: |
| ⓘ Chalcocite Formula: Cu2S |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Copper Formula: Cu |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Chalcanthite | 7.CB.20 | CuSO4 · 5H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chalcanthite | CuSO4 · 5H2O |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Chalcanthite | CuSO4 · 5H2O |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcanthite | CuSO4 · 5H2O |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcanthite | CuSO4 · 5H2O |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10103874 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- Franciscan DomainDomain
- MethowAccretionary Complex
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Alder Mine, Twisp Mining District, Okanogan County, Washington, USA