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Dry Cottonwood placer, Dry Cottonwood Creek, Orofino Mining District, Deer Lodge Co., Montana, USAi
Regional Level Types
Dry Cottonwood placerPlacer
Dry Cottonwood CreekCreek
Orofino Mining DistrictMining District
Deer Lodge Co.County
MontanaState
USACountry

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Key
Latitude & Longitude (WGS84):
46° 12' 15'' North , 112° 38' 57'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Warm Springs3,000 (2013)10.7km
Walkerville700 (2017)20.8km
Deer Lodge2,965 (2017)22.2km
Butte34,190 (2011)23.9km
Anaconda9,417 (2011)24.1km


Sec. 1 (ALSO LOCATED IN SEC 29,33,34,35), T 5 N, R 9 W; headwaters of the west fork.
Commodities (Major) - Gemstone, Gold, Abrasive - Corundum
Development Status: Producer
Structure: Boulder Batholith
Host Rock: Gravel

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


3 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
Corundum
Formula: Al2O3
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
Corundum var: Sapphire
Formula: Al2O3
Reference: Mining Journal, London, Vol. 329, No. 8437, July 11, 1997, p. 27.
Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Corundum4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Unclassified Minerals, Mixtures, etc.
Corundum
var: Sapphire
-Al2O3

List of minerals for each chemical element

OOxygen
O Corundum (var: Sapphire)Al2O3
O CorundumAl2O3
O AlmandineFe32+Al2(SiO4)3
AlAluminium
Al Corundum (var: Sapphire)Al2O3
Al CorundumAl2O3
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si AlmandineFe32+Al2(SiO4)3
FeIron
Fe AlmandineFe32+Al2(SiO4)3
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
MBMG MEM NO 31, P. 21.
USBM INF CIR 7461, P. 5
MBMG MEM NO 26, P. 25, 27
USGS MIN. RES. PART II, P. 881-4.
USGS BULL 842, P. 283-4.
THE NORTHERN MINER, 1994, AMERICAN GEM PRODUCING SAPPHIR

USGS MRDS Record:10019508

Other Regions, Features and Areas containg this locality

North America
North America PlateTectonic Plate

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