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Cofer prospect (Piedmont Mineral Associates prospect), Gold-Pyrite Belt, Louisa County, Virginia, USAi
Regional Level Types
Cofer prospect (Piedmont Mineral Associates prospect)Prospect
Gold-Pyrite BeltBelt
Louisa CountyCounty
VirginiaState
USACountry

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PhotosMapsSearch
00242710017272099113642.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
07771950017272099119529.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
00242710017272099113642.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
07771950017272099119529.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
01658120017272054532558.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
04925380017272099124243.jpg
Galena, etc.

Cofer prospect, Gold-Pyrite Belt, Louisa County, Virginia, USA
Latitude & Longitude (WGS84):
38° 2' 59'' North , 77° 52' 31'' West
Latitude & Longitude (decimal):
38.05000,-77.87528
GeoHash:
G#: dqb87yucq
GRN:
N26W44
Type:
Prospect
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Mineral483 (2017)5.3km
Louisa1,621 (2017)11.6km
Blue Ridge Shores813 (2011)14.4km
Gordonsville1,577 (2017)29.0km
Orange4,947 (2017)29.9km
Mindat Locality ID:
104199
Long-form identifier:
mindat:1:2:104199:9
GUID (UUID V4):
0


Miller and Craig (1997) provide the most comprehensive view available of this ore deposit. The Cofer ore deposit consists of 4 larger and 2 smaller massive sulphide lenses totaling approximately 1.5 MT. The ores appear to be a Kuroko type deposit associated with metavolcanics of the Chopawamsic Formation. The ores of the Cofer deposit are grossly similar to those of similar deposits in the area but contain a much broader assemblage of minor minerals. Like several other ore deposits in the nearby area the Cofer orebodies were characterized by gahnite, irregularly distributed but widespread in concentrations up to several percent (Sandhaus and Craig, 1986).

The deposit has been outlined by extensive drilling and by substantial underground workings completed during the early to mid 1970's. The operation was suspended prior to any production because of deteriorating economic conditions. It is likely that the discovery and extensive exploration of the Cofer deposit was the last mining activity in this region.

Since 2008, the Cofer prospect has become one of many former mine sites to be reclaimed. Based on descriptions of "The Cofer Mine Orphaned Land Project" the site has been sealed, bulldozed, treated with lime, covered and revegetated. Recent air photos make it clear that the site has been extensively reworked.

Structure: Ne-Sw Trend

Alteration: High Temperature, Low To Medium Grade Metamorphism.

Tectonics: Eugeosyncline (Piedmont)

Commodity: Tetrahedrite-tennantite is argentiferous, electrum is 50% Au and 50% ag. All minor ore minerals occur in trace quantities

Deposit: Discovery year: 1950's max. Thickness above is for one lens. There are 4 lenses. Piedmont mineral associates includes NE W jersey zinc co. And callahan mining corp. ; info.src : 1 pub lit; 2 unpub rept

Deposit type: Massive sulfide, kuroko

Development: Deposit is on a stand-by status.

Geology: Mineralogy similar to japanese volcanogenic deposits. Core log delineated in gair (1978)

Rock formation(s): Chopawamsic Formation
Chopawamsic Formation


Ore(s): Elongate Troughs

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


39 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:

ⓘ Antlerite
Formula: Cu3(SO4)(OH)4
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Bianchite
Formula: Zn(SO4) · 6H2O
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Boulangerite
Formula: Pb5Sb4S11
ⓘ Bournonite
Formula: PbCuSbS3
ⓘ Brochantite
Formula: Cu4(SO4)(OH)6
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Cosalite
Formula: Pb2Bi2S5
ⓘ Covellite
Formula: CuS
ⓘ Digenite
Formula: Cu9S5
ⓘ 'Feldspar Group'
ⓘ 'Freibergite Subgroup'
Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
ⓘ Gahnite
Formula: ZnAl2O4
ⓘ Galena
Formula: PbS
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Gudmundite
Formula: FeSbS
ⓘ Gunningite
Formula: ZnSO4 · H2O
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ 'K Feldspar'
ⓘ Kobellite
Formula: Pb22Cu4(Bi,Sb)30S69
ⓘ Linarite
Formula: PbCu(SO4)(OH)2
ⓘ Mackinawite
Formula: FeS
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Marcasite
Formula: FeS2
ⓘ Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
ⓘ Molybdenite
Formula: MoS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Bismuth
Formula: Bi
ⓘ Native Gold
Formula: Au
ⓘ Native Gold var. Electrum
Formula: (Au,Ag)
ⓘ Plumbonacrite
Formula: Pb5O(OH)2(CO3)3
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Rozenite
Formula: FeSO4 · 4H2O
ⓘ Rutile
Formula: TiO2
ⓘ Serpierite
Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
ⓘ Sphalerite
Formula: ZnS
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold
var. Electrum		1.AA.05(Au,Ag)
ⓘ1.AA.05Au
ⓘNative Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘDigenite2.BA.10Cu9S5
ⓘBornite2.BA.15Cu5FeS4
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘMackinawite2.CC.25FeS
ⓘGalena2.CD.10PbS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘArsenopyrite2.EB.20FeAsS
ⓘGudmundite2.EB.20FeSbS
ⓘBournonite2.GA.50PbCuSbS3
ⓘ'Freibergite Subgroup'2.GB.05(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
ⓘKobellite2.HB.10aPb22Cu4(Bi,Sb)30S69
ⓘBoulangerite2.HC.15Pb5Sb4S11
ⓘCosalite2.JB.10Pb2Bi2S5
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘGahnite4.BB.05ZnAl2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
ⓘPlumbonacrite5.BE.15Pb5O(OH)2(CO3)3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAntlerite7.BB.15Cu3(SO4)(OH)4
ⓘBrochantite7.BB.25Cu4(SO4)(OH)6
ⓘLinarite7.BC.65PbCu(SO4)(OH)2
ⓘGunningite7.CB.05ZnSO4 · H2O
ⓘRozenite7.CB.15FeSO4 · 4H2O
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
ⓘBianchite7.CB.25Zn(SO4) · 6H2O
ⓘMelanterite7.CB.35Fe2+(H2O)6SO4 · H2O
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘSerpierite7.DD.30Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Feldspar Group'-
ⓘ'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hⓘ AntleriteCu3(SO4)(OH)4
Hⓘ BianchiteZn(SO4) · 6H2O
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ BrochantiteCu4(SO4)(OH)6
Hⓘ ChalcanthiteCuSO4 · 5H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ GunningiteZnSO4 · H2O
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ LinaritePbCu(SO4)(OH)2
Hⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PlumbonacritePb5O(OH)2(CO3)3
Hⓘ RozeniteFeSO4 · 4H2O
Hⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
CCarbon
Cⓘ PlumbonacritePb5O(OH)2(CO3)3
OOxygen
Oⓘ AntleriteCu3(SO4)(OH)4
Oⓘ BianchiteZn(SO4) · 6H2O
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BrochantiteCu4(SO4)(OH)6
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ GahniteZnAl2O4
Oⓘ GoethiteFe3+O(OH)
Oⓘ GunningiteZnSO4 · H2O
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ IlmeniteFe2+TiO3
Oⓘ LinaritePbCu(SO4)(OH)2
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PlumbonacritePb5O(OH)2(CO3)3
Oⓘ QuartzSiO2
Oⓘ RozeniteFeSO4 · 4H2O
Oⓘ RutileTiO2
Oⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ GahniteZnAl2O4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
SSulfur
Sⓘ AntleriteCu3(SO4)(OH)4
Sⓘ ArsenopyriteFeAsS
Sⓘ BianchiteZn(SO4) · 6H2O
Sⓘ BorniteCu5FeS4
Sⓘ BoulangeritePb5Sb4S11
Sⓘ BournonitePbCuSbS3
Sⓘ BrochantiteCu4(SO4)(OH)6
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ ChalcociteCu2S
Sⓘ CosalitePb2Bi2S5
Sⓘ CovelliteCuS
Sⓘ DigeniteCu9S5
Sⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sⓘ GalenaPbS
Sⓘ GudmunditeFeSbS
Sⓘ GunningiteZnSO4 · H2O
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ KobellitePb22Cu4(Bi,Sb)30S69
Sⓘ LinaritePbCu(SO4)(OH)2
Sⓘ MackinawiteFeS
Sⓘ MarcasiteFeS2
Sⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ RozeniteFeSO4 · 4H2O
Sⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Sⓘ SphaleriteZnS
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ RutileTiO2
FeIron
Feⓘ ArsenopyriteFeAsS
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
Feⓘ GudmunditeFeSbS
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MackinawiteFeS
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ MarcasiteFeS2
Feⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ RozeniteFeSO4 · 4H2O
CuCopper
Cuⓘ AntleriteCu3(SO4)(OH)4
Cuⓘ BorniteCu5FeS4
Cuⓘ BournonitePbCuSbS3
Cuⓘ BrochantiteCu4(SO4)(OH)6
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcanthiteCuSO4 · 5H2O
Cuⓘ ChalcociteCu2S
Cuⓘ CovelliteCuS
Cuⓘ DigeniteCu9S5
Cuⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Cuⓘ KobellitePb22Cu4(Bi,Sb)30S69
Cuⓘ LinaritePbCu(SO4)(OH)2
Cuⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znⓘ BianchiteZn(SO4) · 6H2O
Znⓘ GahniteZnAl2O4
Znⓘ GunningiteZnSO4 · H2O
Znⓘ SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
MoMolybdenum
Moⓘ MolybdeniteMoS2
AgSilver
Agⓘ Native Gold var. Electrum(Au,Ag)
Agⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
SbAntimony
Sbⓘ BoulangeritePb5Sb4S11
Sbⓘ BournonitePbCuSbS3
Sbⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sbⓘ GudmunditeFeSbS
Sbⓘ KobellitePb22Cu4(Bi,Sb)30S69
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AuGold
Auⓘ Native Gold var. Electrum(Au,Ag)
Auⓘ Native GoldAu
PbLead
Pbⓘ BoulangeritePb5Sb4S11
Pbⓘ BournonitePbCuSbS3
Pbⓘ CosalitePb2Bi2S5
Pbⓘ GalenaPbS
Pbⓘ KobellitePb22Cu4(Bi,Sb)30S69
Pbⓘ LinaritePbCu(SO4)(OH)2
Pbⓘ PlumbonacritePb5O(OH)2(CO3)3
BiBismuth
Biⓘ Native BismuthBi
Biⓘ CosalitePb2Bi2S5
Biⓘ KobellitePb22Cu4(Bi,Sb)30S69

Other Databases

Link to USGS MRDS:10080205

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

R.C. BOWYER. SEPT. 8, 1980, P. 1, PLUS ENCLOSURES, 2 PP.
VIRGINIA DEPARTMENT OF MINES, MINERALS & ENERGY, DIVISION OF MINERAL MINING, FINAL REPORT, AGREEMENT: 319-2008-12-PT, JANUARY 12, 2011
Sandhaus, D.J. and Craig, J.R. (1986) Gahnite in the metamorphosed stratiform massive sulfide deposits of the Mineral District, Virginia, USA. Tschermaks mineralogische und petrographische Mitteilungen, 35, 77-98.
CRAIG, J.R., J.W. MILLER, AND D.K. HENRY (1977), COMPARISON OF MASSIVE SULFIDE MINERALOGY AT GOSSAN LEAD WITH THE COFER PROP€RTY, MINERAL, LOUISA COUNTY, VIRGINIA (ABS.): VA. MINER.: 23(3): 28.
HODDER, R.W., KAZDA, R.F., AND BOJTOS, P. (1977) A BASE METAL MASSIVE SULPHIDE DEPOSIT WITHIN A TURBIDITE SUCCESSION OF THE VIRGINIA PIEDMONT (ABSTR). MINING ENGINEERING, JANUARY, 1977
Hodder, R.W., Kazda, R.F., and Bojtos, P., (1977), an Example of Base Metal Massive Sulfide Deposits from Within a Turbidite Succession of the Virginia Piedmont (abs.): Mining Engineering, V. 29, No. 1, P. 83.
GAIR, J.E., (ED.) (1978), MASSIVE SULFIDES OF VIRGINIA FIELD TRIP GUIDEBOOK: INTERNATIONAL GEOLOGICAL CORRELATION PROGRAMME, PROJECT NO. 60, 112 P.
MILLER (1978) THE ORE MINERALOGY OF THE COFER PROPERTY, LOUISA COUNTY, VIRGINIA: A VOLCANOGENIC MASSIVE SULFIDE DEPOSIT. M.S. THESIS, VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY.
GAIR, J.E., (ED.) (1978), MASSIVE SULFIDES OF VIRGINIA FIELD TRIP GUIDEBOOK: INTERNATIONAL GEOLOGICAL CORRELATION PROGRAMME, PROJECT NO. 60, 112 P.
Miller, J.W., Craig, J.R. and Kazda, R.F., (1978), Volcanogenic Sulfides of the Mineral District, Louisa Co., Virginia (abs.): Geological Society of America: Abstracts with Programs, V. 10, No. 7, P. 457
Miller, J.W., Jr., (1978), the Ore Mineralogy of the Cofer Property, Louisa County, Virginia: a Volcanogenic Massive Sulfide Deposit: Virginia Polytechnic Institute and State University, Unpublished Ms Thesis.
Miller, J.W., Craig, J.R. and Kazda, R.F., (1979), Metamorphosed Volcanogenic Ores of the Cofer Deposit, Mineral District, Louisa Co., Virginia (abs.): Geological Society of America: Abstracts with Programs, V. 11, No. 4, P. 205-206.
CALLAHAN MINING CORPORATION (1980), LETTER OF CORRESPONDENCE TO
Miller, J. W., & Craig, J. R. (1997). Ore minerals of the Cofer volcanogenic massive sulfide deposit, Louisa County, Virginia. The Canadian Mineralogist, 35(6), 1465-1483.
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