Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Deer Horn Mine (Cross Lake O'Brien Mine), Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canadai
Regional Level Types
Deer Horn Mine (Cross Lake O'Brien Mine)Mine (Abandoned)
Coleman TownshipTownship
Cobalt areaMining Area
Cobalt-Gowganda regionRegion
Timiskaming DistrictDistrict
OntarioProvince
CanadaCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
05104990017272029441967.jpg
Deer Horn headframe 1960's

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
09390710017272029449417.jpg
Deer Horn headframe 1983

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
08454290017272029451713.jpg
Deer Horn Mine in far distance

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
05104990017272029441967.jpg
Deer Horn headframe 1960's

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
09390710017272029449417.jpg
Deer Horn headframe 1983

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
08454290017272029451713.jpg
Deer Horn Mine in far distance

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
09081020017272029498404.jpg
Deer Horn headframe 1960's

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
09390710017272029449417.jpg
Deer Horn headframe 1983

Deer Horn Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
Latitude & Longitude (WGS84):
47° 23' 27'' North , 79° 38' 43'' West
Latitude & Longitude (decimal):
47.39083,-79.64528
GeoHash:
G#: f0rmeehpd
GRN:
N32W40
Type:
Mine (Abandoned) - last checked 2019
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Temiskaming Shores10,442 (2010)12.6km
Ville-Marie2,831 (2016)17.2km
Saint-Bruno-de-Guigues2,928 (2016)18.1km
Englehart1,685 (2008)50.2km
Mindat Locality ID:
10522
Long-form identifier:
mindat:1:2:10522:9
GUID (UUID V4):
0


Staked in 1907, silver bearing veins were not discovered until 1923. the mine was developed by three shafts to a depth of 1,020ft. The mine was shut down sometime around 1970. Total production was approx. 19 million oz. of Ag; 700,000lbs of Co; 160,000lbs. Cu; and 32,000lbs. Ni

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


29 valid minerals.

Detailed Mineral List:

ⓘ Acanthite
Formula: Ag2S
ⓘ Allargentum
Formula: (Ag1-xSbx)
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Breithauptite
Formula: NiSb
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Cobaltite
Formula: CoAsS
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Dyscrasite
Formula: Ag3Sb
ⓘ Erythrite
Formula: Co3(AsO4)2 · 8H2O
ⓘ Galena
Formula: PbS
ⓘ Gersdorffite
Formula: NiAsS
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Löllingite
Formula: FeAs2
ⓘ Marcasite
Formula: FeS2
ⓘ Native Silver
Formula: Ag
ⓘ Nickeline
Formula: NiAs
ⓘ Nickelskutterudite ?
Formula: NiAs3
ⓘ Proustite
Formula: Ag3AsS3
References:
Reiner Mielke
ⓘ Pyrargyrite
Formula: Ag3SbS3
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Rammelsbergite
Formula: NiAs2
ⓘ Safflorite
Formula: (Co,Ni,Fe)As2
ⓘ Skutterudite
Formula: CoAs3
ⓘ Sphalerite
Formula: ZnS
ⓘ Stephanite
Formula: Ag5SbS4
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Ullmannite
Formula: NiSbS

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
ⓘAllargentum2.AA.30(Ag1-xSbx)
ⓘDyscrasite2.AA.35Ag3Sb
ⓘAcanthite2.BA.35Ag2S
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘBreithauptite2.CC.05NiSb
ⓘNickeline2.CC.05NiAs
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘLöllingite2.EB.15aFeAs2
ⓘRammelsbergite2.EB.15aNiAs2
ⓘSafflorite2.EB.15a(Co,Ni,Fe)As2
ⓘArsenopyrite2.EB.20FeAsS
ⓘCobaltite2.EB.25CoAsS
ⓘGersdorffite2.EB.25NiAsS
ⓘUllmannite2.EB.25NiSbS
ⓘNickelskutterudite ?2.EC.05NiAs3
ⓘSkutterudite2.EC.05CoAs3
ⓘProustite2.GA.05Ag3AsS3
ⓘPyrargyrite2.GA.05Ag3SbS3
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
ⓘStephanite2.GB.10Ag5SbS4
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘErythrite8.CE.40Co3(AsO4)2 · 8H2O

List of minerals for each chemical element

HHydrogen
Hⓘ ErythriteCo3(AsO4)2 · 8H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ CalciteCaCO3
Oⓘ DolomiteCaMg(CO3)2
Oⓘ ErythriteCo3(AsO4)2 · 8H2O
Oⓘ GoethiteFe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
SSulfur
Sⓘ AcanthiteAg2S
Sⓘ ArsenopyriteFeAsS
Sⓘ ChalcopyriteCuFeS2
Sⓘ CobaltiteCoAsS
Sⓘ GalenaPbS
Sⓘ GersdorffiteNiAsS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ MarcasiteFeS2
Sⓘ ProustiteAg3AsS3
Sⓘ PyrargyriteAg3SbS3
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ StephaniteAg5SbS4
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Sⓘ UllmanniteNiSbS
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ GypsumCaSO4 · 2H2O
FeIron
Feⓘ ArsenopyriteFeAsS
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
Feⓘ LöllingiteFeAs2
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Safflorite(Co,Ni,Fe)As2
CoCobalt
Coⓘ CobaltiteCoAsS
Coⓘ ErythriteCo3(AsO4)2 · 8H2O
Coⓘ Safflorite(Co,Ni,Fe)As2
Coⓘ SkutteruditeCoAs3
NiNickel
Niⓘ BreithauptiteNiSb
Niⓘ GersdorffiteNiAsS
Niⓘ NickelskutteruditeNiAs3
Niⓘ NickelineNiAs
Niⓘ RammelsbergiteNiAs2
Niⓘ Safflorite(Co,Ni,Fe)As2
Niⓘ UllmanniteNiSbS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
Asⓘ CobaltiteCoAsS
Asⓘ ErythriteCo3(AsO4)2 · 8H2O
Asⓘ GersdorffiteNiAsS
Asⓘ LöllingiteFeAs2
Asⓘ NickelskutteruditeNiAs3
Asⓘ NickelineNiAs
Asⓘ ProustiteAg3AsS3
Asⓘ RammelsbergiteNiAs2
Asⓘ Safflorite(Co,Ni,Fe)As2
Asⓘ SkutteruditeCoAs3
AgSilver
Agⓘ AcanthiteAg2S
Agⓘ Allargentum(Ag1-xSbx)
Agⓘ DyscrasiteAg3Sb
Agⓘ ProustiteAg3AsS3
Agⓘ PyrargyriteAg3SbS3
Agⓘ Native SilverAg
Agⓘ StephaniteAg5SbS4
SbAntimony
Sbⓘ Allargentum(Ag1-xSbx)
Sbⓘ BreithauptiteNiSb
Sbⓘ DyscrasiteAg3Sb
Sbⓘ PyrargyriteAg3SbS3
Sbⓘ StephaniteAg5SbS4
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Sbⓘ UllmanniteNiSbS
PbLead
Pbⓘ GalenaPbS

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

Ontario Dept. of Mines, 1968, MRC No.10, Silver Cobalt Calcite Vein Deposits of Ontario, by A.O.Sergiades
Sabina, Ann P. (2000) Rocks and minerals for the collector, Cobalt-Belleterre-Timmins, Ontario and Quebec. Miscellaneous report 57. Geological Survey of Canada p.52
Quick NavTopMineral ListOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 15:47:21 Page updated: August 13, 2025 09:05:44
Go to top of page