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Thunder Mountain Prospect, Sisters Mining District, Whatcom County, Washington, USAi
Regional Level Types
Thunder Mountain ProspectProspect
Sisters Mining DistrictMining District
Whatcom CountyCounty
WashingtonState
USACountry

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Latitude & Longitude (WGS84):
48° 42' 29'' North , 122° 0' 39'' West
Latitude & Longitude (decimal):
48.70833,-122.01110
GeoHash:
G#: c29jpe44x
GRN:
N33W59
Type:
Prospect
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Acme246 (2011)14.3km
Deming353 (2011)19.9km
Lyman450 (2017)20.5km
Glacier211 (2011)20.8km
Hamilton298 (2017)20.8km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Mount Baker Rock And Gem ClubBellingham, Washington35km
Skagit Rock and Gem ClubMt. Vernon, Washington38km
North Puget Sound Facetors GuildMount Vernon, Washington40km
Abbotsford Rock & Gem ClubAbbotsford, British Columbia43km
Mindat Locality ID:
68932
Long-form identifier:
mindat:1:2:68932:3
GUID (UUID V4):
0
Other/historical names associated with this locality:
Thunder Mountain Claim; Crater Claim; Hardscrabble Claim; Thunder Claim; Odmark Claim


A chromium prospect consisting of 10 claims located on the headwaters of Orosino Creek that worked chromite stringers and streaks on dunite. Assays ranged from 13%-31% Cr.

Note: Huntting (1956) lists this group as possibly containing the Lambert prospect. Moen (1969) separates them and shows that they are a significant distance apart in the contained map.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


3 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
Unclassified
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Olivine Group'-M2SiO4

List of minerals for each chemical element

HHydrogen
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
OOxygen
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ EnstatiteMg2Si2O6
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Olivine GroupM2SiO4
MgMagnesium
Mgⓘ EnstatiteMg2Si2O6
SiSilicon
Siⓘ EnstatiteMg2Si2O6
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Olivine GroupM2SiO4
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ MagnetiteFe2+Fe23+O4

Other Databases

Link to USGS MRDS:10131537

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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.

References

Valentine, Grant M., Huntting, Marshall T. (1960) Part II - Metallic Minerals, in Inventory of Washington Minerals. Vol II. Bulletin 37, Washington Geological Survey.
Moen, W. (1969) Mines and Mineral Deposits of Whatcom County, Washington. Washington Division of Mines and Geology Bulletin 57, 134 pages.
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