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Big Seven Mine, Neihart District (Montana District), Cascade Co., Montana, USAi
Regional Level Types
Big Seven MineMine
Neihart District (Montana District)Mining District
Cascade Co.County
MontanaState
USACountry

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Latitude & Longitude (WGS84): 46° 56' North , 110° 44' West
Latitude & Longitude (decimal): 46.93333,-110.73333
GeoHash:G#: c836bpyqq
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Sections 27 and 28, T 14 N, R 8 E.

Regions containing this locality

North America Plate

Plate - 4,949 mineral species & varietal names listed

Rocky Mountains, North America

Mountain Range - 2,070 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Freibergite
Formula: Ag6[Cu4Fe2]Sb4S13-x
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Galena
Formula: PbS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Molybdenite
Formula: MoS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pearceite
Formula: [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
Polybasite
Formula: [(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Reference: Dana 7:I:353.
Proustite
Formula: Ag3AsS3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pyrargyrite
Formula: Ag3SbS3
Reference: Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
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 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
'Freibergite'2.GB.05Ag6[Cu4Fe2]Sb4S13-x
'Galena'2.CD.10PbS
'Molybdenite'2.EA.30MoS2
'Pearceite'2.GB.15[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
'Polybasite'2.GB.15[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
'Proustite'2.GA.05Ag3AsS3
'Pyrargyrite'2.GA.05Ag3SbS3
'Pyrite'2.EB.05aFeS2
'Sphalerite'2.CB.05aZnS

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø > 4
Pearceite3.1.8.1[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Polybasite3.1.7.2[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
3 <ø < 4
Freibergite3.3.6.3Ag6[Cu4Fe2]Sb4S13-x
ø = 3
Proustite3.4.1.1Ag3AsS3
Pyrargyrite3.4.1.2Ag3SbS3

List of minerals for each chemical element

SSulfur
S ChalcopyriteCuFeS2
S FreibergiteAg6[Cu4Fe2]Sb4S13-x
S GalenaPbS
S MolybdeniteMoS2
S Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
S Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
S ProustiteAg3AsS3
S PyrargyriteAg3SbS3
S PyriteFeS2
S SphaleriteZnS
FeIron
Fe ChalcopyriteCuFeS2
Fe FreibergiteAg6[Cu4Fe2]Sb4S13-x
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu FreibergiteAg6[Cu4Fe2]Sb4S13-x
Cu Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Cu Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
ZnZinc
Zn SphaleriteZnS
AsArsenic
As Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
As Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
As ProustiteAg3AsS3
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag FreibergiteAg6[Cu4Fe2]Sb4S13-x
Ag Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Ag Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Ag ProustiteAg3AsS3
Ag PyrargyriteAg3SbS3
SbAntimony
Sb FreibergiteAg6[Cu4Fe2]Sb4S13-x
Sb Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Sb Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Sb PyrargyriteAg3SbS3
PbLead
Pb GalenaPbS

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Mesoproterozoic
1000 - 1600 Ma



ID: 3193287
Mesoproterozoic sedimentary rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Paleoproterozoic
1600 - 2500 Ma



ID: 2995637
Quartzofeldspathic gneiss

Age: Proterozoic (1600 - 2500 Ma)

Comments: Original map source: Vuke, S.M., Porter, K.W., Lonn, J.D., and Lopez, D.A., 2007, Geologic Map of Montana - Compact Disc: Montana Bureau of Mines and Geology: Geologic Map 62-C, 73 p., 2 sheets, scale 1:500,000. This map was digitized in 2012 as a result of a contract betwe

Lithology: Major:{gneiss}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Dana 7:I:353.


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