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Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USAi
Regional Level Types
Porter ClaimProspect
Middle Fork of the Snoqualmie RiverRiver
Snoqualmie Mining DistrictMining District
King CountyCounty (Historical)
WashingtonState
USACountry

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PhotosMapsSearch
00316580017272045384859.jpg
Power Plant and Pumps

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
08520020017471905214633.jpg
Quartz

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
02387110017272045392664.jpg
Chalcopyrite

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
00316580017272045384859.jpg
Power Plant and Pumps

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
09004540017496011404330.jpg
Quartz

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
02387110017272045392664.jpg
Chalcopyrite

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
03669400017272045427286.jpg
Power Plant and Pumps

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
08520020017471905214633.jpg
Quartz

Porter Claim, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
Latitude & Longitude (WGS84):
47° 29' 28'' North , 121° 22' 25'' West
Latitude & Longitude (decimal):
47.49122,-121.37370
GRN:
N32W60
Type:
Prospect
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Snoqualmie Pass311 (2011)11.2km
Skykomish207 (2017)24.3km
Tanner1,018 (2011)28.0km
Riverbend2,132 (2011)28.4km
Wilderness Rim1,523 (2017)30.1km
Mindat Locality ID:
19299
Long-form identifier:
mindat:1:2:19299:7
GUID (UUID V4):
0
Other/historical names associated with this locality:
Shangri La, Porter Zone


A copper prospect on the south side of the Middle Fork of the Snoqualmie River. Around 50' of tunnel was driven in a failed attempt to develop ore. Small quartz crystals are abundant around the gulch in the breccia.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 valid minerals.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘSiderite5.AB.05FeCO3
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Pennine9.EC.55Mg5Al(AlSi3O10)(OH)8
Unclassified
ⓘ'K Feldspar
var. Adularia'		-KAlSi3O8
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'K Feldspar'-
ⓘ'Amphibole Supergroup
var. Byssolite'		-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Hⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
CCarbon
Cⓘ SideriteFeCO3
OOxygen
Oⓘ K Feldspar var. AdulariaKAlSi3O8
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ SideriteFeCO3
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Oⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
AlAluminium
Alⓘ K Feldspar var. AdulariaKAlSi3O8
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Alⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Siⓘ K Feldspar var. AdulariaKAlSi3O8
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Siⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SSulfur
Sⓘ ChalcopyriteCuFeS2
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
Kⓘ K Feldspar var. AdulariaKAlSi3O8
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Tiⓘ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ SideriteFeCO3
CuCopper
Cuⓘ ChalcopyriteCuFeS2

Other Databases

Link to USGS MRDS:10228377

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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References

Thurber, H.K., Miller, Michael S., McMahan, Arel B. and Federspiel, Frank E. (1989), Economic appraisal of the Alpine Lakes study area and additions, Washington, USGS Bulletin 1542-E: 94-97.
U.S. Bureau of Mines (1995), Minerals Availability System/Mineral Industry Location System (MAS/MILS), U.S. Bureau of Mines, file ID #0530331239
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
He, Eric (2019) Minerals of King County, Washington. https://www.mindat.org/a/kingco_minerals
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