Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Piquette Mine (Piquette #2), Tennyson area, Grant County, Wisconsin, USAi
Regional Level Types
Piquette Mine (Piquette #2)Mine
Tennyson areaMining Area
Grant CountyCounty
WisconsinState
USACountry
Piquette Mine (Piquette #2), Tennyson area, Upper Mississippi Valley Zinc-Lead District, USA

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Latitude & Longitude (WGS84):
42° 41' 25'' North , 90° 40' 57'' West
Latitude & Longitude (decimal):
42.69028,-90.68250
GRN:
N29W48
Type:
Mine
Köppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Tennyson350 (2017)0.2km
Potosi678 (2017)2.4km
Dickeyville1,039 (2017)10.2km
Sherrill176 (2017)12.7km
Kieler497 (2017)13.8km
Mindat Locality ID:
25697
Long-form identifier:
mindat:1:2:25697:6
GUID (UUID V4):
0


This was a fairly large zinc-lead mine that opened in 1954. It produced ore from veins and disseminated material in the carbonate rocks of the Ordovician Galena and Decorah Formations. A deposit lay under the village of Tennyson (SW 1/4 NE 1/4 Sec 36 T3N R3W). A study done long after the mine was abandoned documented sphalerite and wurtzite are in biofilm deposits on decayed wood found in mine waters draining from the mine.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Enargite
Formula: Cu3AsS4
ⓘ Galena
Formula: PbS
ⓘ Marcasite
Formula: FeS2
ⓘ Millerite
Formula: NiS
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
ⓘ Wurtzite
Formula: (Zn,Fe)S

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘWurtzite2.CB.45(Zn,Fe)S
ⓘMillerite2.CC.20NiS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘEnargite2.KA.05Cu3AsS4
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2

List of minerals for each chemical element

CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ CalciteCaCO3
Oⓘ DolomiteCaMg(CO3)2
Oⓘ QuartzSiO2
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ EnargiteCu3AsS4
Sⓘ GalenaPbS
Sⓘ MarcasiteFeS2
Sⓘ MilleriteNiS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
Sⓘ Wurtzite(Zn,Fe)S
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ Wurtzite(Zn,Fe)S
NiNickel
Niⓘ MilleriteNiS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ EnargiteCu3AsS4
ZnZinc
Znⓘ SphaleriteZnS
Znⓘ Wurtzite(Zn,Fe)S
AsArsenic
Asⓘ EnargiteCu3AsS4
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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.

References

Heyl, Allen V., Agnew, Allen F., Lyons, Erwin J., Behre, Charles H., Flint, Arthur E. (1959) The Geology of the Upper Mississippi Valley Zinc-Lead District. Professional Paper 309. US Geological Survey doi:10.3133/pp309 pp.241-242
Heyl, A. (1964) Enargite in the zinc-lead deposits of the Upper Mississippi Valley district: Amercian Mineralogist: 46 (9-10) : 1458-1461.
Moreau, J. , R. Webb & J. Banfield (2004) Ultrastructure, aggregate state and crystal growth of nano crystalline sphalerite and wurtzite, American Mineralogist: 89(7): 950-960
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