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Mt Washington mine, Comox District, Vancouver Island, Nanaimo Mining Division, British Columbia, Canadai
Regional Level Types
Mt Washington mineMine
Comox DistrictMining District
Vancouver IslandIsland
Nanaimo Mining DivisionDivision
British ColumbiaProvince
CanadaCountry

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Key
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Latitude & Longitude (WGS84): 49° 45' 48'' North , 125° 18' 8'' West
Latitude & Longitude (decimal): 49.76333,-125.30222
GeoHash:G#: c0yghejsq
Locality type:Mine
Köppen climate type:Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Courtenay32,793 (2013)23.8km
Cumberland2,630 (2017)25.2km
Campbell River33,430 (2018)28.4km
Denman Island1,020 (2018)43.2km


Mined 1964-67. Infamous for the continuing pollution of the nearby Tsolum River, by leach of copper from sulphide dumps.

Regions containing this locality

North America PlateTectonic Plate
Vancouver Island, Alberni Mining Division/Nanaimo Mining Division/Victoria Mining Division, British Columbia, CanadaIsland

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


30 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

'α-Arsenic Sulphide'
Formula: AsS
Reference: Roberts, A.C., Ansell, H.G., Bonardi, M. (1980) Pararealgar, a new polymorph of AsS, from British Columbia. The Canadian Mineralogist 18 525-527.
Arsenic
Formula: As
Reference: [MinRec 15:89]; Can Min (1980) 18, 525-27
Arsenolite
Formula: As2O3
Reference: Can Min (1980) 18, 525-27
Arsenopyrite
Formula: FeAsS
Reference: Can Min (1980) 18, 525-27; MINFILE No 092F 117
Bornite
Formula: Cu5FeS4
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Calcite
Formula: CaCO3
Reference: Reiner Mielke
Chalcocite
Formula: Cu2S
Reference: Mineralogical Record 15, 89-90
Chalcopyrite
Formula: CuFeS2
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Chalcostibite
Formula: CuSbS2
Reference: Mineralogical Record 15, 89-90
Cooperite
Formula: PtS
Covellite
Formula: CuS
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Duranusite
Formula: As4S
Reference: Handbook of Mineralogy; Can Min (1980) 18, 525-27
Galena
Formula: PbS
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Goethite
Formula: α-Fe3+O(OH)
Reference: Mineralogical Record 15, 89-90
Gold
Formula: Au
Reference: Mineralogical Record 15, 89-90
Hessite
Formula: Ag2Te
Reference: Mineralogical Record 15, 89-90
Lepidocrocite
Formula: γ-Fe3+O(OH)
Reference: ROBERTS, A.C., ANSELL, H.G. & BONARDI, M. (1980): Pararealgar, a new polymorph of AsS, from British Columbia. Canadian Mineralogist 18, 525-527.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Mineralogical Record 15, 89-90
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Mineralogical Record 15, 89-90
Molybdenite
Formula: MoS2
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Orpiment
Formula: As2S3
Reference: MINFILE No 092F 117
Pararealgar (TL)
Formula: As4S4
Type Locality:
Reference: ROBERTS, A.C., ANSELL, H.G. & BONARDI, M. (1980): Pararealgar, a new polymorph of AsS, from British Columbia. Canadian Mineralogist 18, 525-527. BONAZZI, P., MENCHETTI, S. & PRATESI, G. (1995): The crystal structure of pararealgar, As4S4. American Mineralogist 80, 400-403.
Pyrite
Formula: FeS2
Reference: MINFILE No 092F 117
Pyrrhotite
Formula: Fe7S8
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Quartz
Formula: SiO2
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Realgar
Formula: As4S4
Reference: Can Min (1980) 18, 525-27; MINFILE No 092F 117
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: Mineralogical Record 15, 89-90
Sphalerite
Formula: ZnS
Reference: Mineralogical Record 15, 89-90; MINFILE No 092F 117
Stibnite
Formula: Sb2S3
Reference: Can Min (1980) 18, 525-27
Sulphur
Formula: S8
Reference: ROBERTS, A.C., ANSELL, H.G. & BONARDI, M. (1980): Pararealgar, a new polymorph of AsS, from British Columbia. Canadian Mineralogist 18, 525-527.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Can Min (1980) 18, 525-27

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Arsenic1.CA.05As
Gold1.AA.05Au
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Chalcostibite2.HA.05CuSbS2
Cooperite2.CC.35bPtS
Covellite2.CA.05aCuS
Duranusite2.FA.05As4S
Galena2.CD.10PbS
Hessite2.BA.60Ag2Te
Molybdenite2.EA.30MoS2
Orpiment2.FA.30As2S3
Pararealgar (TL)2.FA.15bAs4S4
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Realgar2.FA.15aAs4S4
Sphalerite2.CB.05aZnS
Stibnite2.DB.05Sb2S3
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - Oxides and Hydroxides
Arsenolite4.CB.50As2O3
Goethite4.00.α-Fe3+O(OH)
Lepidocrocite4.FE.15γ-Fe3+O(OH)
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Unclassified Minerals, Rocks, etc.
'α-Arsenic Sulphide'-AsS

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
Semi-metals and non-metals
Arsenic1.3.1.1As
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmXp, with m:p > 3:1
Duranusite2.1.4.1As4S
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Hessite2.4.2.1Ag2Te
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Cooperite2.8.5.1PtS
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Pararealgar (TL)2.8.21.2As4S4
Pyrrhotite2.8.10.1Fe7S8
Realgar2.8.21.1As4S4
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Orpiment2.11.1.1As2S3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
ø = 2
Chalcostibite3.7.5.1CuSbS2
Group 4 - SIMPLE OXIDES
A2X3
Arsenolite4.3.9.1As2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Lepidocrocite6.1.2.2γ-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'α-Arsenic Sulphide'-AsS

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H MalachiteCu2(CO3)(OH)2
H ScoroditeFe3+AsO4 · 2H2O
H Lepidocrociteγ-Fe3+O(OH)
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O ArsenoliteAs2O3
O CalciteCaCO3
O Goethiteα-Fe3+O(OH)
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O QuartzSiO2
O ScoroditeFe3+AsO4 · 2H2O
O Lepidocrociteγ-Fe3+O(OH)
SiSilicon
Si QuartzSiO2
SSulfur
S PararealgarAs4S4
S DuranusiteAs4S
S CooperitePtS
S RealgarAs4S4
S StibniteSb2S3
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S ArsenopyriteFeAsS
S BorniteCu5FeS4
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S ChalcostibiteCuSbS2
S CovelliteCuS
S GalenaPbS
S MolybdeniteMoS2
S PyrrhotiteFe7S8
S SphaleriteZnS
S PyriteFeS2
S OrpimentAs2S3
S SulphurS8
S α-Arsenic SulphideAsS
CaCalcium
Ca CalciteCaCO3
FeIron
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Fe ArsenopyriteFeAsS
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe MagnetiteFe2+Fe23+O4
Fe PyrrhotiteFe7S8
Fe ScoroditeFe3+AsO4 · 2H2O
Fe PyriteFeS2
Fe Lepidocrociteγ-Fe3+O(OH)
CuCopper
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Cu BorniteCu5FeS4
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu ChalcostibiteCuSbS2
Cu CovelliteCuS
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Zn SphaleriteZnS
AsArsenic
As PararealgarAs4S4
As ArsenicAs
As DuranusiteAs4S
As RealgarAs4S4
As ArsenopyriteFeAsS
As ArsenoliteAs2O3
As ScoroditeFe3+AsO4 · 2H2O
As OrpimentAs2S3
As α-Arsenic SulphideAsS
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag HessiteAg2Te
SbAntimony
Sb StibniteSb2S3
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Sb ChalcostibiteCuSbS2
TeTellurium
Te HessiteAg2Te
PtPlatinum
Pt CooperitePtS
AuGold
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

Oligocene - Eocene
23.03 - 56 Ma



ID: 667606
Mount Washington Plutonic Suite

Age: Paleogene (23.03 - 56 Ma)

Stratigraphic Name: Mount Washington Plutonic Suite

Description: Quartz diorite, feldspar-hornblende dacite porphyry (includes volcanic breccias of the Mount Washington area) (42 - 32 Ma) (92F, L).

Comments: N.W.D. Massey, P.J. Desjardins, and E.C. Grunsky, 1994, Geological Compilation of Vancouver Island, OF 1994-6, BCGS

Lithology: Quartz dioritic intrusive rocks

Reference: B.C. Geological Survey. British Columbia Digital Geology. [3]

Oligocene - Eocene
23.03 - 56 Ma



ID: 3421828
Mount Washington Plutonic Suite

Age: Paleogene (23.03 - 56 Ma)

Stratigraphic Name: Mount Washington Plutonic Suite

Description: Quartz diorite, feldspar-hornblende dacite porphyry (includes volcanic breccias of the Mount Washington area) (42 - 32 Ma) (92F, L).

Comments: Post Accretionary terrane

Lithology: Quartz dioritic intrusive rocks

Reference: Cui, Y., Miller, D., Schiarizza, P., and Diakow, L.J. British Columbia digital geology. British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey Open File 2017-8. [205]

Triassic
201.3 - 251.902 Ma



ID: 3188141
Mesozoic volcanic rocks

Age: Triassic (201.3 - 251.902 Ma)

Lithology: Mafic volcanic 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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

External Links

ROBERTS, A.C., ANSELL, H.G. & BONARDI, M. (1980): Pararealgar, a new polymorph of AsS, from British Columbia. Canadian Mineralogist 18, 525-527.
BONAZZI, P., MENCHETTI, S. & PRATESI, G. (1995): The crystal structure of pararealgar,As4S4. American Mineralogist 80, 400-403.
Ingelson, A. (1984) Mineral occurrences in Western Canada. Mineralogical Record 15, 89-94


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