Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Thunder Creek, Cascade Mining District, Skagit County, Washington, USAi
Regional Level Types
Thunder CreekRiver
Cascade Mining DistrictMining District
Skagit CountyCounty
WashingtonState
USACountry

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Latitude & Longitude (WGS84):
48° 31' 52'' North , 120° 59' 36'' West
Latitude & Longitude (decimal):
48.53115,-120.99350
GRN:
N33W58
Type:
River
Köppen climate type:
Dsc : Dry-summer subarctic climate
Mindat Locality ID:
416272
Long-form identifier:
mindat:1:2:416272:1
GUID (UUID V4):
0


Structure: Tight Folding Along North-Northwest Trending Axes Fault

Alteration: Diorite Is Altered

Tectonics: Active Margin (Leading Edge Of North American Plate)

Deposit: Vein, composed of breccia cemented by gouge and ore minerals, averages 5 in. Wide along a fault in diorite 6 patented claims: dorothy nos. 1-6, and a millsite. A ton or so of ore on the trail belo W the mine. ; info.src : 1 pub lit

Deposit type: Polymetallic veins

Geology: Geolgoy projected from tabor and others

Rock formation(s): Skagit Gneiss Complex


Ore(s): Fault

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

6 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Galena
Formula: PbS
ⓘ Native Gold
Formula: Au
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2

List of minerals for each chemical element

OOxygen
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZnZinc
Znⓘ SphaleriteZnS
AuGold
Auⓘ Native GoldAu
PbLead
Pbⓘ GalenaPbS

Other Databases

Link to USGS MRDS:10088862

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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