Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Our Science Mindat Newsletter [Free Download]Contact Us

Donate to Mindat Sponsor a Page Corporate Sponsorship Sponsored Pages

Learning Center What Is a Mineral?The Most Common Minerals on Earth Information for Educators Mindat Articles Mindat Newsletter [Free Download]The Elements The Mineral Quiz

Minerals by Properties Minerals by Chemistry Mineral Visual Explorer Advanced Locality Search Random Mineral Random Locality Search by minID Minerals by Country Alphabetical Mineral Index Alphabetical Locality Search Mineral Association Search List of Countries Localities Near Me Photo Search Search Articles Search Glossary The Rock H. Currier Digital Library More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Minerals Petrology Fossils Meteorites Geologic Time

Mining Companies Statistics Mineral Museums Clubs & Organizations Mineral Shows & Events Device Settings Time Machine

Read Discussions Identification Request

Photo Search Photo Galleries Search by Colour Photo Colour Explorer New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Coleroy Mine (Collins Mine; Leroy Lake Mine), Nicol Township, Gowganda area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada i
Regional Level Types
Coleroy Mine (Collins Mine; Leroy Lake Mine) Mine
Nicol Township Township
Gowganda area Area
Cobalt-Gowganda region Region
Timiskaming District District
Ontario Province
Canada Country

Regional Level Types
Coleroy Mine (Collins Mine; Leroy Lake Mine)	Mine
Nicol Township	Township
Gowganda area	Area
Cobalt-Gowganda region	Region
Timiskaming District	District
Ontario	Province
Canada	Country

This page is currently not sponsored. Click here to sponsor this page.

Photos Maps Search

Standard

Specimen Photos (1)Photos by Color Add Photo

Map Pages Nearest Localities

Mineral Search Similar Localities Nearest Localities Predictive Mineralogy Search Google Ontario Canada Geological SurveyMinfile

Bornite, etc.

Coleroy Mine, Nicol Township, Gowganda area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada

Bornite, etc.

Coleroy Mine, Nicol Township, Gowganda area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada

Bornite, etc.

Coleroy Mine, Nicol Township, Gowganda area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada

Latitude & Longitude (WGS84):

47° 39' 38'' North , 80° 42' 3'' West

Latitude & Longitude (decimal):

G#: f0qx5s74z

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Mindat Locality ID:

10204

Long-form identifier:

mindat:1:2:10204:6

GUID (UUID V4):

A silver-copper-nickel mine on the SW shore of Leroy Lake, owned by Agnico. Discovered in 1926 by Peerles Silver Mines, later acquired by Silver Bar Mines in 1969. Also known as the Leroy Lake mine. Minerals occur in Quartz-Calcite veins in Keewatin volcanics and Nipissing Diabase.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

13 valid minerals.

Detailed Mineral List:

ⓘ Acanthite

Formula: Ag₂S

References:

Ontario MDI Number: MDI41P10NE00038

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Bornite

Formula: Cu₅FeS₄

ⓘ Breithauptite

Formula: NiSb

References:

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Calcite

Formula: CaCO₃

Colour: colorless to cream-colored

Description: As crystals from 0.5 to 2 mm in vugs associated with bornite.

References:

D. E. Russell (Personal observation)

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Ontario MDI Number: MDI41P10NE00038

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Cobaltite

Formula: CoAsS

References:

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Maucherite

Formula: Ni₁₁As₈

References:

Petruk (1971): The Silver-Arsenide Deposits of the Cobalt-Gowganda Region, Ontario. Can. Mineral. 11, 153

ⓘ Native Bismuth

Formula: Bi

References:

Ontario MDI Number: MDI41P10NE00038

ⓘ Native Silver

Formula: Ag

References:

Ontario MDI Number: MDI41P10NE00038

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Nickeline

Formula: NiAs

References:

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

ⓘ Pyrite

Formula: FeS₂

References:

Ontario MDI Number: MDI41P10NE00038

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

ⓘ Quartz

Formula: SiO₂

References:

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

ⓘ Skutterudite

Formula: CoAs₃

References:

Burrows, A. G. (1922) Gowganda and Other Silver Areas. Annual Report of the Ontario Department of Mines Vol. 30 (3). Department of Mines

Sabina, A. P. (1974) Rocks and minerals for the collector: Cobalt - Belleterre - Timmins, Ontario and Quebec. Paper 73-13. Geological Survey of Canada doi:10.4095/103345

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Silver	1.AA.05	Ag
ⓘ	Native Bismuth	1.CA.05	Bi
Group 2 - Sulphides and Sulfosalts
ⓘ	Maucherite	2.AB.15	Ni₁₁As₈
ⓘ	Bornite	2.BA.15	Cu₅FeS₄
ⓘ	Acanthite	2.BA.35	Ag₂S
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Breithauptite	2.CC.05	NiSb
ⓘ	Nickeline	2.CC.05	NiAs
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Cobaltite	2.EB.25	CoAsS
ⓘ	Skutterudite	2.EC.05	CoAs₃
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃

List of minerals for each chemical element

C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Calcite	CaCO₃
O	ⓘ Quartz	SiO₂
Si	Silicon
Si	ⓘ Quartz	SiO₂
S	Sulfur
S	ⓘ Acanthite	Ag₂S
S	ⓘ Bornite	Cu₅FeS₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Cobaltite	CoAsS
S	ⓘ Pyrite	FeS₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Fe	Iron
Fe	ⓘ Bornite	Cu₅FeS₄
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrite	FeS₂
Co	Cobalt
Co	ⓘ Cobaltite	CoAsS
Co	ⓘ Skutterudite	CoAs₃
Ni	Nickel
Ni	ⓘ Breithauptite	NiSb
Ni	ⓘ Maucherite	Ni₁₁As₈
Ni	ⓘ Nickeline	NiAs
Cu	Copper
Cu	ⓘ Bornite	Cu₅FeS₄
Cu	ⓘ Chalcopyrite	CuFeS₂
As	Arsenic
As	ⓘ Cobaltite	CoAsS
As	ⓘ Maucherite	Ni₁₁As₈
As	ⓘ Nickeline	NiAs
As	ⓘ Skutterudite	CoAs₃
Ag	Silver
Ag	ⓘ Acanthite	Ag₂S
Ag	ⓘ Native Silver	Ag
Sb	Antimony
Sb	ⓘ Breithauptite	NiSb
Bi	Bismuth
Bi	ⓘ Native Bismuth	Bi

Other Databases

Ontario Canada Geological SurveyMinfile:	MDI41P10NE00038

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Superior Craton
- Wawa-Abitibi TerraneCraton

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

OGS 1978, Rpt.175, Geology of the Gowganda Lake-Miller Lake silver area, District of Timiskaming, W.H. McIlwaine

www.geologyontario.mndmf.gov.on.ca (n.d.) http://www.geologyontario.mndmf.gov.on.ca/mndmfiles/mdi/data/records/MDI41P10NE00038.html

Sabina, Ann P. (2000) Rocks and minerals for the collector, Cobalt-Belleterre-Timmins, Ontario and Quebec. Miscellaneous report 57. Geological Survey of Canada p.78

Quick NavTop Mineral List Other Databases Other Regions References

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: October 14, 2026 04:17:53 Page updated: August 20, 2025 19:07:43

Go to top of page