Boundary Red Mountain Mine, Mount Baker Mining District, Whatcom County, Washington, USAi
| Regional Level Types | |
|---|---|
| Boundary Red Mountain Mine | Mine |
| Mount Baker Mining District | Mining District |
| Whatcom County | County |
| Washington | State |
| USA | Country |
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Latitude & Longitude (WGS84):
48° 59' 41'' North , 121° 37' 49'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Slesse Park | 238 (2011) | 17.1km |
| Bell Acres | 582 (2011) | 19.6km |
| Baker Trails | 635 (2011) | 24.6km |
| Glacier | 211 (2011) | 25.8km |
| Skowkale 10 | 623 (2019) | 27.6km |
Other/historical names associated with this locality:
Red Mountain Mine; Boundary Mountain Mine; Boundary Red Mine
A gold mine near the Canadian Border on the north face of Red Mountain. The ore occurred in a quartz vein near the contact zone between argillite of the Chilliwack Group and the Slesse Diorite of the Chilliwack Batholith. Faults and fractures contain veining and offset it. The main vein averaged 3' in width and pinched and swelled from a few inches to 10' wide. There were multiple mineralized veins at the site, but only one was mined to any real extent. It produced around 35,000 oz of gold equivalent (gold and silver) from 1913-1942. Development consisted of several thousand feet of workings and a mill.
Alteration: Oxidation
Tectonics: Cascade Volcanic Arc
Commodity: Silver is present appears to be alloyed with gold. Grains of gold As big As 2 mm were present in ore shoots.
Deposit: Finely divided gold in quartz veins, 6 in.-10 ft thick (avg 3 ft). Veins crop out on surface As far As 900 ft along strike, but because of several north-trending faults, veins are not continuous for more than 100 ft. Au is distributed irregularly and tends to follo W microbrecciated parts of vein parallel to margins of main vein. 6 patented claims (see sketch map in moen). ; info.src : 1 pub lit
Deposit type: Low-sulfide Au-quartz vein
Development: By 1913, gold was being crushed in 5 stamp mill. In 1916, 5 additional stamps were added. In 1914, mine was the main gold producer in county
Geology: Deposit lies along faults in contact zone between chilliwack group and slesse diorite. Gold-bearing veins probably formed during 2 stages of mineralization. Initially, fractures were filled with quartz containing pyrite, pyrrhotite, and chalcopyrite. Hydrothermal gold-bismuth telluride solutions later infiltrated veins.
Rock formation(s): Chilliwack Formation;Chilliwack Composite Batholith
Ore(s): Contact Zone; Numerous Faults And Fractures
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
8 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:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Native Silver Formula: Ag |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Tellurobismuthite Formula: Bi2Te3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Tellurobismuthite | 2.DC.05 | Bi2Te3 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
| Te | Tellurium | |
| Te | ⓘ Tellurobismuthite | Bi2Te3 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Bi | Bismuth | |
| Bi | ⓘ Tellurobismuthite | Bi2Te3 |
Other Databases
| Link to USGS MRDS: | 10047741 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Cascade RangeMountain Range
North America PlateTectonic Plate
- ChilliwackVolcanic Arc
- Franciscan DomainDomain
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Boundary Red Mountain Mine, Mount Baker Mining District, Whatcom County, Washington, USA