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⇱ Cyclone Mine, Ophir Mining District, Powell County, Montana, USA


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Cyclone Mine, Ophir Mining District, Powell County, Montana, USAi
Regional Level Types
Cyclone MineMine
Ophir Mining DistrictMining District
Powell CountyCounty
MontanaState
USACountry

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Latitude & Longitude (WGS84):
46° 41' 55'' North , 112° 29' 45'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Avon111 (2011)13.9km
Elliston219 (2011)16.0km
Helena West Side1,637 (2011)31.3km
Lincoln1,013 (2011)31.8km
Helena Valley Northwest3,482 (2011)33.2km
Mindat Locality ID:
161019
Long-form identifier:
mindat:1:2:161019:5
GUID (UUID V4):
0


REF:Deposit:: MBMG BULL 98, P. 27, 33, 62.
Deposit:: MBMG BULL 33, P. 28.
Production:: MBMG BULL 98, P. 62.
Commodities (Major) - Copper; (Minor) - Gold, Silver
Development Status: Past Producer
Structure: Boulder Batholith
Host Rock: Granite, Porphyry, Limestone

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


4 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 Diagram

Detailed Mineral List:

'Garnet Group'
Formula: X3Z2(SiO4)3
Gold
Formula: Au
Malachite
Formula: Cu2(CO3)(OH)2
Quartz
Formula: SiO2
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Unclassified
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O MalachiteCu2(CO3)(OH)2
O QuartzSiO2
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O Garnet GroupX3Z2(SiO4)3
MgMagnesium
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
SiSilicon
Si QuartzSiO2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si Garnet GroupX3Z2(SiO4)3
FeIron
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
CuCopper
Cu MalachiteCu2(CO3)(OH)2
AuGold
Au GoldAu

Other Databases

Link to USGS MRDS:10015926

Other Regions, Features and Areas containing this locality


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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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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