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Seattle-Cascade Mine, Miller River Mining District, King County, Washington, USAi
| Regional Level Types | |
|---|---|
| Seattle-Cascade Mine | Mine |
| Miller River Mining District | Mining District |
| King County | County (Historical) |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 40' 5'' North , 121° 25' 4'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Other/historical names associated with this locality:
Triple S Mine, Silver Dollar Mine, Copper Plate Mine, Ashikun Mine
This mine had many name changes throughout its history, but not much production. Development consisted of around 1500' of workings on two unconnected adits, as well as a third adit of unknown length.
Tectonics: The Snoqualmie Batholith Is Part Of Early Magmatism Of The Cascade Magmatic Arc.
Development: Econ.com: minor production prior to 1900; produced again in 1940 (huntting, 1956, p. 297).
Geology: The seattle-cascade mine is in rocks of the snoqualmie batholith, northern phase, which consists of granodiorite and tonalite and is light colored, medium crystalline, and mostly equigranular and has hypidiomorphic texture. The rocks are coarsely jointed and contain biotite and hornblende and locally clinopyroxene. Age of the northern phase is about 25 m.y. Based on interpretation of numerous discordant k-ar ages of both hornblende and biotite (tabor and others, 1982, p. 8).
Ore(s): Mineralization Occurs In A 1.5-Ft-Wide Shear Zone In Granodiorite, In Bands As Much As 8-In-Thick And Which Assay As Much As 30 Oz/Ton Ag (Moen, 1976, P. 167).
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.
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 |
| ⓘ 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 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| 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 |
| 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: | 10055932 |
|---|
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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Seattle-Cascade Mine, Miller River Mining District, King County, Washington, USA