Una Mine, Miller River Mining District, King County, Washington, USAi
| Regional Level Types | |
|---|---|
| Una Mine | Mine |
| Miller River Mining District | Mining District |
| King County | County (Historical) |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 39' 19'' North , 121° 25' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Skykomish | 207 (2017) | 8.0km |
| Baring | 220 (2011) | 13.7km |
| Index | 194 (2017) | 20.6km |
| May Creek | 818 (2011) | 28.3km |
| Snoqualmie Pass | 311 (2011) | 29.3km |
Other/historical names associated with this locality:
John Stevens Mine; Little Una Mine
A Cu, Ag, Au mine located on the West fork of the Miller River that worked a 20ft body of tourmaline.
Tectonics: The Snoqualmie Batholith Is Part Of Early Magmatism Of The Cascade Magmatic Arc.
Development: ECON.COM: PRODUCED IN 1908 (HUNTTING, 1957, P. 59).
Geology: The una 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): A 20-Ft. Body Of Tourmaline At The Una Mine Is Described By Smith (1915, P. 184-185). The Brief Description Suggests The Tourmaline Is Massive Crystalline, But May Also Be A Portion Of A Breccia Pipe.
Tectonics: The Snoqualmie Batholith Is Part Of Early Magmatism Of The Cascade Magmatic Arc.
Development: ECON.COM: PRODUCED IN 1908 (HUNTTING, 1957, P. 59).
Geology: The una 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): A 20-Ft. Body Of Tourmaline At The Una Mine Is Described By Smith (1915, P. 184-185). The Brief Description Suggests The Tourmaline Is Massive Crystalline, But May Also Be A Portion Of A Breccia Pipe.
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
3 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ 'Tourmaline' Formula: AD3G6(T6O18)(BO3)3X3Z |
Gallery:
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 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| B | Boron | |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10055934 |
|---|
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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Una Mine, Miller River Mining District, King County, Washington, USA