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Croesus Mine (Dobie-Leyson), Munro Township, Cochrane District, Ontario, Canada

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Latitude & Longitude (WGS84): 48° 33' 1'' North , 80° 14' 48'' West
Latitude & Longitude (decimal): 48.55028,-80.24667
GeoHash:G#: f0wujyq1v
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate

Gold Mine off of Highway 101. This mine produced the richest ore ever mined in Ontario.

Samples of high-grade Croesus gold ore, possessed by the Ontario Department of mines, consisted of highly shattered grey quartz, cemented by irregular veinlets of Gold.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

9 valid minerals.

Detailed Mineral List:

Formula: FeAsS
Reference: Satterly, J. (1951): Geology of Munro Township. Sixtieth Annual Report of the Ontario Department of Mines. 60, Part 8.
Formula: CuFeS2
Reference: MDI Number: MDI42A09SE00012
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: MDI Number: MDI42A09SE00012
Formula: Au
Reference: Satterly, J. (1951): Geology of Munro Township. Sixtieth Annual Report of the Ontario Department of Mines. 60, Part 8.
Formula: FeS2
Reference: Satterly, J. (1951): Geology of Munro Township. Sixtieth Annual Report of the Ontario Department of Mines. 60, Part 8.
Formula: Fe7S8
Reference: MDI Number: MDI42A09SE00012
Formula: SiO2
Reference: Satterly, J. (1951): Geology of Munro Township. Sixtieth Annual Report of the Ontario Department of Mines. 60, Part 8.
Formula: Ag
Reference: MDI Number: MDI42A09SE00012
Formula: ZnS
Reference: MDI Number: MDI42A09SE00012
Formula: (Au,Ag)2Te4
Reference: MDI Number: MDI42A09SE00012
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: MDI Number: MDI42A09SE00012

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Metals, other than the Platinum Group
Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:1
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Garnet GroupX3Z2(SiO4)3
O QuartzSiO2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
Si Garnet GroupX3Z2(SiO4)3
Si QuartzSiO2
S ArsenopyriteFeAsS
S ChalcopyriteCuFeS2
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Cu ChalcopyriteCuFeS2
Zn SphaleriteZnS
As ArsenopyriteFeAsS
Ag SilverAg
Ag Sylvanite(Au,Ag)2Te4
Te Sylvanite(Au,Ag)2Te4
Au GoldAu
Au Sylvanite(Au,Ag)2Te4

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

Neoarchean - Mesoarchean
2500 - 3200 Ma

ID: 615085
Mafic to intermediate metavolcanic rocks

Age: Archean (2500 - 3200 Ma)

Comments: Superior Province

Lithology: Basaltic and andesitic flows, tuffs and breccias, chert, iron formation, minor metasedimentary and intrusive rocks, related migmatites

Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1. [1]

2500 - 2800 Ma

ID: 3187495
Archean sedimentary rocks

Age: Neoarchean (2500 - 2800 Ma)

Comments: Superior Province

Lithology: Metasedimentary schist

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, used under Creative Commons Attribution 4.0 License


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Satterly, J. (1951): Geology of Munro Township. Sixtieth Annual Report of the Ontario Department of Mines. 60, Part 8.
MDI Number: MDI42A09SE00012

External Links

This page contains all mineral locality references listed on 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 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.
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