Leonard Mine, Butte Mining District (Summit Valley Mining District), Silver Bow County, Montana, USAi
| Regional Level Types | |
|---|---|
| Leonard Mine | Mine |
| Butte Mining District (Summit Valley Mining District) | Mining District |
| Silver Bow County | County |
| Montana | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 1' 14'' North , 112° 30' 18'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Walkerville | 700 (2017) | 2.8km |
| Butte | 34,190 (2011) | 3.0km |
| Butte-Silver Bow (Balance) | 33,525 (2013) | 17.7km |
| Warm Springs | 3,000 (2013) | 28.0km |
| Basin | 212 (2011) | 33.5km |
A former Cu-Ag-W-Pb-Zn mine located in secs. 7 & 89. T3N, R7W, MPM, E of the Berkeley pit, on private land. Discovered in 1886. The first production occurred in 1887. Owned and operated by the Anaconda Co., Butte, Montana 59701. MRDS database accuracy for this location is not stated.
Mineralisation is a polymetallic deposit hosted in quartz monzonite and granite. The orebody strikes N70E and dips steeply S. Ore is principally from horsetail orebodies of the eastern portion of the main district & NW-trending main stage veins. The largest masses of quartz porphyry in the district are found near the Leonard & East Colusa shafts – these bodies are in or near the horsetail ore zone of the central district. Copper mineralisation occurs in horsetail orebodies and NW-trending main stage veins. The orebody in places consisted of a mass of crushed granite. The ground between the veins was netted, lesser streaks were abundant and in many places, the granite was cobwebbed with ore. Local alteration includes main stage alteration. Associated rocks include Late Cretaceous quartz monzonite (Boulder batholith). Local rocks include alluvium.
Geologic structures include the regional Boulder batholith and the local Rarus fault.
Mining has been exclusively on selective veins of both ages W of the middle fault, on horsetail bodies and selective veins between the middle fault and No. 20 fault. Very little exploration and development work have been carried out E of the No. 20 fault.
Note on the mineral list: Rhodochrosite specimens labelled as from the Leonard Mine are most likely not from this mine. Rhodochrosite should not have occurred at this mine (Reference: The Mineralogical Record (2002): 33(1) (special issue on Butte, Montana)).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
32 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Acanthite Formula: Ag2S |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) |
| ⓘ Baryte Formula: BaSO4 |
| ⓘ Betekhtinite Formula: Pb2(Cu,Fe)22-24S15 |
| ⓘ Bornite Formula: Cu5FeS4 |
| ✪ Chalcocite Formula: Cu2S |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Colusite Formula: Cu13VAs3S16 |
| ⓘ Covellite Formula: CuS |
| ⓘ Dickite Formula: Al2(Si2O5)(OH)4 |
| ✪ Digenite Formula: Cu9S5 References: |
| ⓘ Djurleite Formula: Cu31S16 |
| ⓘ Dolomite Formula: CaMg(CO3)2 References: Guilbert, J., Zeihen, L.G. (1964) The mineralogy of the Butte district, Montana. Open-File Report 268. Montana Bureau of Mines and Geologypp.6-7 - Also Table 3-2. Siderite and Dolomite both appear rarely in the Intermediate Zone of the Butte District. |
| ✪ Enargite Formula: Cu3AsS4 Habit: Crystals Colour: Black Description: Occasionaly pseudomorphed after hubnerite. |
| ⓘ Fluorite Formula: CaF2 |
| ⓘ Galena Formula: PbS |
| ⓘ Gypsum Formula: CaSO4 · 2H2O References: |
| ⓘ Hinsdalite Formula: PbAl3(PO4)(SO4)(OH)6 Description: Occurs as excellent colorless to greenish tinted transparent micro-crystals on enargite, covellite, and quartz crystals from the Leonard Mine. |
| ⓘ Hübnerite Formula: MnWO4 |
| ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 |
| ⓘ Luzonite Formula: Cu3AsS4 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Native Silver Formula: Ag |
| ⓘ Pearceite Formula: [Ag6As2S7][Ag9CuS4] |
| ⓘ Polybasite Formula: [Ag6Sb2S7][Ag9CuS4] |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrophyllite Formula: Al2Si4O10(OH)2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Rhodochrosite ? Formula: MnCO3 Description: Very doubtful. Ref: Min. Rec. 33:1 References: |
| ⓘ Siderite Formula: FeCO3 References: Guilbert, J., Zeihen, L.G. (1964) The mineralogy of the Butte district, Montana. Open-File Report 268. Montana Bureau of Mines and Geologypp.6-7 - Also Table 3-2. Siderite and Dolomite both appear rarely in the Intermediate Zone of the Butte District. |
| ⓘ Sphalerite Formula: ZnS References: |
| ⓘ 'Tennantite Subgroup' Formula: Cu6(Cu4C2+2)As4S12S References: |
| ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
| ✪ Wurtzite Formula: (Zn,Fe)S Habit: Crystals Colour: Black References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Djurleite | 2.BA.05 | Cu31S16 |
| ⓘ | Digenite | 2.BA.10 | Cu9S5 |
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Acanthite | 2.BA.35 | Ag2S |
| ⓘ | Betekhtinite | 2.BE.05 | Pb2(Cu,Fe)22-24S15 |
| ⓘ | Covellite | 2.CA.05a | CuS |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Colusite | 2.CB.30 | Cu13VAs3S16 |
| ⓘ | Wurtzite | 2.CB.45 | (Zn,Fe)S |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | 'Tennantite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)As4S12S |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| ⓘ | Pearceite | 2.GB.15 | [Ag6As2S7][Ag9CuS4] |
| ⓘ | Polybasite | 2.GB.15 | [Ag6Sb2S7][Ag9CuS4] |
| ⓘ | Enargite | 2.KA.05 | Cu3AsS4 |
| ⓘ | Luzonite | 2.KA.10 | Cu3AsS4 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Hübnerite | 4.DB.30 | MnWO4 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Rhodochrosite ? | 5.AB.05 | MnCO3 |
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Hinsdalite | 8.BL.05 | PbAl3(PO4)(SO4)(OH)6 |
| Group 9 - Silicates | |||
| ⓘ | Pyrophyllite | 9.EC.10 | Al2Si4O10(OH)2 |
| ⓘ | Dickite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| Unclassified | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| H | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | ⓘ Rhodochrosite | MnCO3 |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| O | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| O | ⓘ Hübnerite | MnWO4 |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rhodochrosite | MnCO3 |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Acanthite | Ag2S |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Betekhtinite | Pb2(Cu,Fe)22-24S15 |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Colusite | Cu13VAs3S16 |
| S | ⓘ Covellite | CuS |
| S | ⓘ Digenite | Cu9S5 |
| S | ⓘ Djurleite | Cu31S16 |
| S | ⓘ Enargite | Cu3AsS4 |
| S | ⓘ Galena | PbS |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| S | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
| S | ⓘ Luzonite | Cu3AsS4 |
| S | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| S | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| S | ⓘ Wurtzite | (Zn,Fe)S |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| V | Vanadium | |
| V | ⓘ Colusite | Cu13VAs3S16 |
| Mn | Manganese | |
| Mn | ⓘ Hübnerite | MnWO4 |
| Mn | ⓘ Rhodochrosite | MnCO3 |
| Fe | Iron | |
| Fe | ⓘ Betekhtinite | Pb2(Cu,Fe)22-24S15 |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Wurtzite | (Zn,Fe)S |
| Cu | Copper | |
| Cu | ⓘ Betekhtinite | Pb2(Cu,Fe)22-24S15 |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Colusite | Cu13VAs3S16 |
| Cu | ⓘ Covellite | CuS |
| Cu | ⓘ Digenite | Cu9S5 |
| Cu | ⓘ Djurleite | Cu31S16 |
| Cu | ⓘ Enargite | Cu3AsS4 |
| Cu | ⓘ Luzonite | Cu3AsS4 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| Cu | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Cu | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Zn | ⓘ Wurtzite | (Zn,Fe)S |
| As | Arsenic | |
| As | ⓘ Colusite | Cu13VAs3S16 |
| As | ⓘ Enargite | Cu3AsS4 |
| As | ⓘ Luzonite | Cu3AsS4 |
| As | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| As | ⓘ Tennantite Subgroup | Cu6(Cu4C22+)As4S12S |
| Ag | Silver | |
| Ag | ⓘ Acanthite | Ag2S |
| Ag | ⓘ Pearceite | [Ag6As2S7][Ag9CuS4] |
| Ag | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Ag | ⓘ Native Silver | Ag |
| Sb | Antimony | |
| Sb | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| W | Tungsten | |
| W | ⓘ Hübnerite | MnWO4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Betekhtinite | Pb2(Cu,Fe)22-24S15 |
| Pb | ⓘ Galena | PbS |
| Pb | ⓘ Hinsdalite | PbAl3(PO4)(SO4)(OH)6 |
Other Databases
| Link to USGS MRDS: | 10070469 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Great Falls DomainDomain
- Northern Rocky MountainsWide Rift
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Leonard Mine, Butte Mining District, Silver Bow County, Montana, USA