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Marget Ann Mine, Walkerville, Butte District (Summit Valley District), Silver Bow Co., Montana, USA

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Latitude & Longitude (WGS84): 46° 2' 15'' North , 112° 31' 50'' West
Latitude & Longitude (decimal): 46.03750,-112.53056
GeoHash:G#: c2pvzkcgb
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


Commodities (Major) - Gold, Silver, Copper; (Minor) - Lead, Zinc; (Trace) - Manganese
Development Status: Past Producer
Structure: Boulder Batholith
Host Rock: Quartz Monzonite

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,039 mineral species & varietal names listed

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


10 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:

Acanthite
Formula: Ag2S
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
Calcite
Formula: CaCO3
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'Electrum'
Formula: (Au, Ag)
Reference: Chris Gammons and Ryan Stevenson (2015) Silver Mineralogy of the Butte Mines. 2015 Mining and Mineral Symposium, Montana Bureau of Mines and Geology p50; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
Galena
Formula: PbS
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
Gold
Formula: Au
Reference: Chris Gammons and Ryan Stevenson (2015) Silver Mineralogy of the Butte Mines. 2015 Mining and Mineral Symposium, Montana Bureau of Mines and Geology p50; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'commodity:Gold'
Formula: Au
Reference: From USGS MRDS database
Jalpaite
Formula: Ag3CuS2
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'K Feldspar'
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'commodity:Lead'
Formula: Pb
Reference: From USGS MRDS database
Pearceite
Formula: [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
Quartz
Formula: SiO2
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'Quartz-monzonite'
Reference: From USGS MRDS database
Rhodochrosite
Formula: MnCO3
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
Rhodonite
Formula: Mn2+SiO3
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'commodity:Silver'
Formula: Ag
Reference: From USGS MRDS database
Sphalerite
Formula: ZnS
Reference: Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website
'commodity:Zinc'
Formula: Zn
Reference: From USGS MRDS database

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au, Ag)
'Gold'1.AA.05Au
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Galena'2.CD.10PbS
'Jalpaite'2.BA.45Ag3CuS2
'Pearceite'2.GB.15[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
'Sphalerite'2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Rhodochrosite'5.AB.05MnCO3
Group 9 - Silicates
'Rhodonite'9.DK.05Mn2+SiO3
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Quartz-monzonite'-

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 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Jalpaite2.4.4.1Ag3CuS2
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
Group 3 - SULFOSALTS
ø > 4
Pearceite3.1.8.1[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Rhodonite65.4.1.1Mn2+SiO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Electrum'-(Au, Ag)
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Quartz-monzonite'-

List of minerals for each chemical element

CCarbon
C CalciteCaCO3
C RhodochrositeMnCO3
OOxygen
O K Feldspar (var: Adularia)KAlSi3O8
O CalciteCaCO3
O QuartzSiO2
O RhodochrositeMnCO3
O RhodoniteMn2+SiO3
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si QuartzSiO2
Si RhodoniteMn2+SiO3
SSulfur
S AcanthiteAg2S
S GalenaPbS
S JalpaiteAg3CuS2
S Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
S SphaleriteZnS
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca CalciteCaCO3
MnManganese
Mn RhodochrositeMnCO3
Mn RhodoniteMn2+SiO3
CuCopper
Cu JalpaiteAg3CuS2
Cu Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
ZnZinc
Zn SphaleriteZnS
AsArsenic
As Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
AgSilver
Ag AcanthiteAg2S
Ag Electrum(Au, Ag)
Ag JalpaiteAg3CuS2
Ag Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
SbAntimony
Sb Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]
AuGold
Au Electrum(Au, Ag)
Au GoldAu
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

Cretaceous
66 - 145 Ma



ID: 2113917
Biotite-hornblende granodioritic rocks along the Continental Divide, Anaconda Range, Sapphire Mountains, and Flint Creek Range

Age: Cretaceous (66 - 145 Ma)

Lithology: Major:: {biotite-hornblende granodiorite, biotite-hornblende monzogranite, tonalite}

Reference: Zientek, M.L., P.D. Derkey, R.J. Miller, J.D. Causet et al. Spatial Databases for the Geology of the Northern Rocky Mountains - Idaho, Montana, and Washington. U.S. Geological Survey Open-File Report 2005-1235 Version 1.0. [25]

Cretaceous
66 - 145 Ma



ID: 3187684
Mesozoic intrusive rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Intrusive igneous 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]

Cretaceous
66 - 145 Ma



ID: 2984479
Granitic rock

Age: Cretaceous (66 - 145 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:{granitic}

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Stout, K.S., Ackerman, W.C., Baber, K.D., Kingston, G.A., and Peterson, N.S. (1959) Directory of Known Mining Enterprises. Montana Bureau of Mines and Geology Bulletin 10, 80 p. (p. 64).
Weed, W.H. (1912) Geology and Ore Deposits of the Butte District, Montana. United States Geological Survey Professional Paper 74 (Pl. X).
Win, M.S. (1955) Geol... Marget Ann Mine, Silver Bow Co., MT. Unpublished MS Thesis.
Sahinen, W.M. (1953) Geology of the Marget Ann Mine, Butte District, Montana. Bachelors Theses and Reports, 1928 - 1970. 407. [https://digitalcommons.mtech.edu/cgi/viewcontent.cgi?article=1407&context=bach_theses]
Anonymous (xxxx) Marget Ann Mine. Unpublished United States Bureau of Mines manuscript.
MPF #41.39

External Links



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