Black Dike Prospect, Miller River Mining District, King County, Washington, USAi
| Regional Level Types | |
|---|---|
| Black Dike Prospect | Prospect |
| Miller River Mining District | Mining District |
| King County | County (Historical) |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 38' 56'' North , 121° 25' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Skykomish | 207 (2017) | 8.2km |
| Baring | 220 (2011) | 14.5km |
| Index | 194 (2017) | 21.5km |
| Snoqualmie Pass | 311 (2011) | 28.6km |
| May Creek | 818 (2011) | 29.2km |
Other/historical names associated with this locality:
Black Rock Prospect, Portland Prospect
An iron prospect along the West Fork of the Miller River. It exploited spods of magnetite and schorl, with around 250,000 tons of material averaging 20% iron estimated to have been discovered. The upper workings encountered copper sulfides.
Tectonics: Cascade Volcanic Arc
Deposit: Area cut by NW and NE trending joints. Two types of deposits. Magnetite is disseminated in a cliff, in blebs and pods along joint faces, and As veins to 1 ft wide. Copper mineralization is found in a breccia pipe 25 x 60 x 40 ft. Copper mineralization has been tentatively given the informal name of a breccia pipe cu deposit, for which there is no published model. The type of deposit for the magnetite mineralization is unknown
Rock formation(s): Snoqualmie Batholith
Tectonics: Cascade Volcanic Arc
Deposit: Area cut by NW and NE trending joints. Two types of deposits. Magnetite is disseminated in a cliff, in blebs and pods along joint faces, and As veins to 1 ft wide. Copper mineralization is found in a breccia pipe 25 x 60 x 40 ft. Copper mineralization has been tentatively given the informal name of a breccia pipe cu deposit, for which there is no published model. The type of deposit for the magnetite mineralization is unknown
Rock formation(s): Snoqualmie Batholith
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
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Aegirine ? Formula: NaFe3+Si2O6 References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
| ⓘ Anatase Formula: TiO2 References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
| ⓘ Brookite Formula: TiO2 References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ Siderite Formula: FeCO3 References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
| ⓘ Titanite ? Formula: CaTiO(SiO4) References: Aidan Cerenzie CollectionIdentified by Aidan Cerenzie: Visual Identification |
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Anatase | 4.DD.05 | TiO2 |
| ⓘ | Brookite | 4.DD.10 | TiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Group 9 - Silicates | |||
| ⓘ | Titanite ? | 9.AG.15 | CaTiO(SiO4) |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Aegirine ? | 9.DA.25 | NaFe3+Si2O6 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| C | Carbon | |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Aegirine | NaFe3+Si2O6 |
| O | ⓘ Anatase | TiO2 |
| O | ⓘ Brookite | TiO2 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Titanite | CaTiO(SiO4) |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Na | Sodium | |
| Na | ⓘ Aegirine | NaFe3+Si2O6 |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Aegirine | NaFe3+Si2O6 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Titanite | CaTiO(SiO4) |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Titanite | CaTiO(SiO4) |
| Ti | Titanium | |
| Ti | ⓘ Anatase | TiO2 |
| Ti | ⓘ Brookite | TiO2 |
| Ti | ⓘ Titanite | CaTiO(SiO4) |
| Fe | Iron | |
| Fe | ⓘ Aegirine | NaFe3+Si2O6 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Siderite | FeCO3 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS MRDS: | 10095809 |
|---|
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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Black Dike Prospect, Miller River Mining District, King County, Washington, USA