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Ontario Geological Survey

Mineral-Related Activity in the Southern Ontario Resident Geologist District
between January 2025 and April 2025


Mining and Exploration Activity
CompanyProperty Township or Area Commodity Work Type

Assessment Files Received
Company Property Assessment File Township or Area Work Type
Blake Davis, Darren Davis Cedar Lake Browns Bay Claim 20000022694
Barrie Geological Survey / Mapping, Prospecting By Licence Holder
Earth Resources Ltd Bass Lake Claims 20000022627
Galway Assaying and Analyses, Geological Survey / Mapping, Prospecting By Licence Holder, Rock Sampling
Earth Resources Ltd Horseshoe Lake Claims 20000022519
Cavendish, Glamorgan Assaying and Analyses, Prospecting By Licence Holder, Rock Sampling
Jordan Clements Marble Lake Claim 20000022618
Barrie Geological Survey / Mapping, Manual Labour, Prospecting By Licence Holder, Rock Sampling
Skead Holdings Ltd 20000022685
Cardiff, Monmouth Assaying and Analyses
Skead Holdings Ltd 20000022686
Lavant Assaying and Analyses

Mineral Inventory Updates
Deposit Name MDI Identifier Township or Area Primary Commodity Secondary Commodity Mineral Deposit Status
Allied Chem G-4 Anderdon 35-1 MDI40J03NE00005 Anderdon Silica Sand Discretionary Occurrence
Austin Corners Quarry MDI30M12NW00006 Esquesing Sandstone Occurrence
B.A. No.23-Warwick 22-6n MDI40P04SW00010 Warwick Salt Discretionary Occurrence
Bannockburn MDI31C12NE00019 Madoc Iron, Sulphur/Pyrite Past Producing Mine Without Reserves or Resources
Big Creek 1 MDI40J03SE00002 Malden Silica Sand Discretionary Occurrence
Big Creek 3 MDI40J03SE00003 Malden Silica Sand Discretionary Occurrence
Bob Neill MDI31C12SE00034 Marmora Gold Occurrence
Brown-Rabidoux 1 Malden 80-7 MDI40J03SE00015 Malden Silica Sand Discretionary Occurrence
Brunner Mond #6 Anderdon 7-28-Rr MDI40J03NE00006 Anderdon Silica Sand Discretionary Occurrence
Brunner Mond #A-2 MDI40J03NE00004 Anderdon Silica Sand Discretionary Occurrence
C.W. 1 15-1 Malden 15-1 MDI40J03SE00020 Malden Silica Sand Discretionary Occurrence
C.W.P. #1 MDI40J03SE00005 Malden Silica Sand Discretionary Occurrence
Caledonia Gypsum Co. MDI30M04SW00010 Seneca Gypsum Past Producing Mine Without Reserves or Resources
Canad. Delhi-Br1 Anderdon 10-6 MDI40J03NE00007 Anderdon Silica Sand Discretionary Occurrence
Canad. Delhi-Homf Colchester North 13nmr MDI40J02NW00002 Colchester Silica Sand Discretionary Occurrence
Canad. Delhi-Mc1 Anderdon 9-8 MDI40J02NW00003 Anderdon Silica Sand Discretionary Occurrence
Canada Cement Lafarge Kettle Point Shale MDI40J16NE00002 Plympton Shale (Structural Material) Discretionary Occurrence
Canadian Hemisphere Petroleum No.2 MDI40P13SE00007 Wawanosh Salt Discretionary Occurrence
Canadian Salt - Sandwich Brine Field-1 MDI40J06SE00003 Sandwich Salt Past Producing Mine Without Reserves or Resources
Canadian Salt - Windsor Brine Field MDI40J06SE00008 Sandwich Salt Past Producing Mine Without Reserves or Resources
Canadian Salt Co.-Sandwich Brine Field-2 MDI40J06SE00004 Sandwich Salt Producing Mine
Charlotteville 18 Conc. V MDI40I16SW00003 Charlotteville Gypsum Discretionary Occurrence
Colonial Malden 4-42-4 MDI40J03SE00016 Malden Silica Sand Discretionary Occurrence
Colwell Grove MDI40J03SE00004 Malden Silica Sand Discretionary Occurrence
Consol. West 104 Malden 63-4 MDI40J03SE00017 Malden Silica Sand Discretionary Occurrence
Consol. West. Petrl. Malden Kp-1s MDI40J03SE00018 Malden Silica Sand Discretionary Occurrence
Cooper East MDI31C11NW00023 Madoc Soapstone, Talc Developed Prospect With Reported Reserves or Resources
Cordova MDI31C12SW00005 Marmora Gold Past Producing Mine With Reserves or Resources
Corunna Brine Field MDI40J16NW00004 Moore Salt Past Producing Mine Without Reserves or Resources
Coste-Drke-Lani Malden 68-6 MDI40J03SE00019 Malden Silica Sand Discretionary Occurrence
Cwp-Flemont 2 Malden 62-7 MDI40J03SE00021 Malden Silica Sand Discretionary Occurrence
Dome Storage C Snadwich West 59-1 MDI40J06SE00007 Sandwich Silica Sand Discretionary Occurrence
Dow Chemical - River Front Brine Field MDI40J16NW00007 Sarnia Salt Past Producing Mine Without Reserves or Resources
Dow Chemical-Moore Twp. Brine Field No.1 MDI40J16NW00008 Moore Salt Past Producing Mine Without Reserves or Resources
Dow Chemical-Moore Twp. Brine Field No.2 MDI40J16NW00003 Moore Salt Past Producing Mine With Reserves or Resources
Dow-Sarnia 1-16-2 MDI40J16NW00024 Sarnia Salt Discretionary Occurrence
Drake Walk-Hia Colchester South 1-2 MDI40J02SW00004 Colchester Silica Sand Discretionary Occurrence
Drake Walker G1 Malden Kp-1s MDI40J03SE00022 Malden Silica Sand Discretionary Occurrence
Drake-Walk-Park 1 Malden 83-7 MDI40J03SE00023 Malden Silica Sand Discretionary Occurrence
Drake-Walk-Rod Anderdon 5-8 MDI40J02NW00004 Anderdon Silica Sand Discretionary Occurrence
Drake-Walk-Wild1 Malden 87-8 MDI40J03SE00024 Malden Silica Sand Discretionary Occurrence
Drake-Walk. Dl1 Colchester South 7-5 MDI40J02SW00003 Colchester Silica Sand Discretionary Occurrence
Drake-Walk. Km1 Colchester South 3-3 MDI40J02SW00005 Colchester Silica Sand Discretionary Occurrence
Dupel MDI31E02SW00004 Hindon Copper Occurrence
Elliot Point Farm MDI40J03SE00006 Malden Silica Sand Discretionary Occurrence
Essex G&O 8 Malden 14-2 MDI40J03SE00025 Malden Silica Sand Discretionary Occurrence
Essex Oil & Gas #11 MDI40J03SE00008 Malden Silica Sand Discretionary Occurrence
Essex Oil & Gas #6 MDI40J03SE00007 Malden Silica Sand Discretionary Occurrence
Gawley No.1 MDI31C12SE00025 Marmora Gold Prospect
General Chem.-Brunner Mond Brine Field MDI40J03NE00002 Anderdon Salt Past Producing Mine Without Reserves or Resources
General Chemical-Anderdon Brine Field MDI40J03NW00002 Anderdon Salt Past Producing Mine Without Reserves or Resources
Goderich Salt Company Brine Field MDI40P13SE00002 Colborne Salt Past Producing Mine Without Reserves or Resources
Grey, Young & Sparling - Wingham Brine Field MDI40P14NW00002 Turnberry Salt Occurrence
Hampshire Mills DH 1 MDI31D11NW00006 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hampshire Mills DH 6 MDI31D11NW00007 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hampshire Mills DH-12 MDI31D11NW00010 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hampshire Mills DH-14 MDI31D11NW00005 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hampshire Mills DH-2 MDI31D11NW00009 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hampshire Mills DH-3 MDI31D11NW00008 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Hardie MDI31C14SE00042 Barrie Copper, Gold, Silver, Zinc Antimony, Lead Prospect
Harmon - Moore 8-9-11 MDI40J16NW00019 Moore Salt Discretionary Occurrence
Harvest Pet.Ihs Colchestersouth 76-Front MDI40J02SW00006 Colchester Silica Sand Discretionary Occurrence
Hilltop Quarry-1 MDI30M12NW00008 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
Hilltop Stone and Supply Quarry MDI30M12NW00004 Esquesing Sandstone Developed Prospect Without Reported Reserves or Resources
Imperial 114 Colchester North 15-Smr MDI40J02SW00007 Colchester Silica Sand Discretionary Occurrence
Imperial 412-R. McCabe No.1 MDI40P12NE00011 Colborne Salt Discretionary Occurrence
Imperial 526-6.Feagan No.1 MDI40P13SW00002 Ashfield Salt Discretionary Occurrence
Imperial 554-M. Turnbull No.2 MDI40P05SE00006 Stephen Salt Discretionary Occurrence
Imperial 562-E.A. Toll No.1 MDI40P14SW00003 Wawanosh Salt Discretionary Occurrence
Imperial 583-P. Fisher No.1 MDI40P12NE00010 Colborne Salt Discretionary Occurrence
Imperial 658-J. Wain No.1 MDI40P12SE00005 Goderich Salt Discretionary Occurrence
Imperial 710 Colchester South 79-Front MDI40J02SW00008 Colchester Silica Sand Discretionary Occurrence
Imperial 802 Paq 1 Malden 7-49-5 MDI40J03SE00028 Malden Silica Sand Discretionary Occurrence
Imperial 851 Colchester South 2-3 MDI40J02SW00011 Colchester Silica Sand Discretionary Occurrence
Imperial No. 739 Colchester South 3-Gore MDI40J02SW00009 Colchester Silica Sand Discretionary Occurrence
Imperial No. 751 Malden 25-3 MDI40J03SE00026 Malden Silica Sand Discretionary Occurrence
Imperial No. 769 Cal Van-Malden 75-10-11 MDI40J03SE00030 Malden Silica Sand Discretionary Occurrence
Imperial No. 806 Malden 73-6 MDI40J03SE00029 Malden Silica Sand Discretionary Occurrence
Imperial No.741 Cochester North 12 Nmr MDI40J02NW00005 Colchester Silica Sand Discretionary Occurrence
Imperial No.772 Colchester North 14 Smr MDI40J02SW00012 Colchester Silica Sand Discretionary Occurrence
Imperial No.773 Anderdon 9-6 MDI40J03NE00008 Anderdon Silica Sand Discretionary Occurrence
Imperial No.775 Sandwich South 10-12 MDI40J02NW00006 Sandwich Silica Sand Discretionary Occurrence
Imperial Oil No.404 - W. Moore No.1 MDI40J16NW00009 Sarnia Salt Discretionary Occurrence
Imperial Oil No.555 - Moore 21-12 MDI40J16NW00014 Moore Salt Discretionary Occurrence
Ioe S. Colchest. Colchester 1-2 MDI40J02SW00010 Colchester Silica Sand Discretionary Occurrence
Ioel Union Enniskillen 4-3-14 MDI40J16NE00004 Enniskillen Salt Discretionary Occurrence
K.R. Bosanquet 2-9-11 MDI40P04NW00004 Bosanquet Salt Discretionary Occurrence
Kelly-Czerewko MDI31C12SE00119 Marmora Magnetite, Wollastonite Garnet (Nonmetals) Occurrence
Kincardine Salt Company - Brine Field MDI41A04NE00002 Kincardine Salt Past Producing Mine Without Reserves or Resources
Landfill Quarry MDI40G10NW00001 Pelee Island Limestone (Building Stone) Past Producing Mine Without Reserves or Resources
Lewis 23-King 1 Malden 59-Front MDI40J03SE00032 Malden Silica Sand Discretionary Occurrence
Lewis 25-King 3 Malden 59-7 MDI40J03SE00033 Malden Silica Sand Discretionary Occurrence
Logan 31 Conc. 3 MDI40P11SE00003 Logan Gypsum Discretionary Occurrence
Martin Quarry MDI30M12NW00009 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
McClure Union - Enniskillen 7-4-11 MDI40J16NE00007 Enniskillen Salt Discretionary Occurrence
Merritton Quarry MDI30M03NE00003 Grantham Dolomite (Building Stone), Sandstone Past Producing Mine Without Reserves or Resources
Mesa - Plympton 1-4-5 MDI40J16NE00008 Plympton Salt Discretionary Occurrence
Mitchellville MDI31B05NW00006 Escott Copper Magnetite Prospect
Moira River Conservation Authority MDI31C12SE00115 Marmora Wollastonite Occurrence
Morgan Stone Company Quarry MDI30M12SW00005 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
Murray MDI31F14SE00020 Pembroke Mica Discretionary Occurrence
N.W. Malden Wood #1 MDI40J03SE00009 Malden Silica Sand Discretionary Occurrence
New Smithson Quarry MDI30M12NW00015 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
Nicholson Quarry MDI40P16NE00002 Mono Sandstone Past Producing Mine Without Reserves or Resources
Nw Maldn. Synd. 1 Malden 53-5 MDI40J03SE00031 Malden Silica Sand Discretionary Occurrence
O'Shea-Warwick 1-12-5N MDI40P04SW00009 Warwick Salt Discretionary Occurrence
Ogs-W-3 MDI40J06SE00006 Sandwich Silica Sand Discretionary Occurrence
Oneida Twp. Quarry-2 MDI30L13NW00014 Oneida Sandstone Past Producing Mine Without Reserves or Resources
Owen Sound Stone - Orangeville Quarry MDI40P16NE00003 Mono Sandstone Past Producing Mine Without Reserves or Resources
P & H Husky Moore 2-13-8 MDI40J16NW00016 Moore Salt Discretionary Occurrence
P.H. and H. Colchester South 5-2-2 MDI40J02SW00013 Colchester Silica Sand Discretionary Occurrence
P.H. and H. Malden 3-41-4 MDI40J03SE00034 Malden Silica Sand Discretionary Occurrence
Parke MDI40J03SE00010 Malden Silica Sand Discretionary Occurrence
Pay Rock MDI31C14SE00148 Barrie Gold Occurrence
Pelee Island Quarry MDI40G15SE00004 Pelee Island Limestone (Crushed Stones) Producing Mine
Place-Frn. Petrl Malden Cd-Gr MDI40J03SE00035 Malden Silica Sand Discretionary Occurrence
Ram No.45 Malden 4-93-8 MDI40J02SW00014 Malden Silica Sand Discretionary Occurrence
Rice and McHarg Quarry MDI30M12NW00011 Esquesing Sandstone Producing Mine
S. Skelin Quarry-2 MDI30M12NW00012 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
Salerno Zone MDI000000001804 Cavendish Graphite Prospect
Scudder West MDI40G15SE00007 Pelee Island Limestone (Building Stone) Past Producing Mine Without Reserves or Resources
Seaforth Brine Field MDI40P11SW00002 Tuckersmith Salt Occurrence
Silver Prospect MDI31C12SE00443 Marmora Silver Lead Occurrence
Smith-Big Creek 1 Malden 56-4 MDI40J03SE00036 Malden Silica Sand Discretionary Occurrence
South Malone MDI31C12SE00218 Marmora Gold Discretionary Occurrence
Stapleton - Clinton Brine Field MDI40P12SE00003 Tuckersmith Salt Past Producing Mine Without Reserves or Resources
Structural Sandstone Quarry MDI30M12NW00014 Esquesing Dolostone, Sandstone Past Producing Mine Without Reserves or Resources
Sucker Lake Occurrences MDI31C15SE00090 South Sherbrooke Garnet (Nonmetals) Discretionary Occurrence
Summit Lake MDI31F02SW00032 South Canonto Aggregate, Magnetite Producing Mine
Timbers Sandstone Quarry MDI30M12SW00016 Esquesing Sandstone Past Producing Mine Without Reserves or Resources
Uhtoff-Orillia Twp. DH 6 MDI31D11NW00011 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Uhtoff-Orillia Twp. DH-10 MDI31D12NE00005 Orillia Limestone (Chemical/Flux) Discretionary Occurrence
Union 36 Enniskillen 4-1-7 MDI40J16NE00005 Enniskillen Salt Discretionary Occurrence
Union Gas - Moore No.18 - G&M Boyle No.1 MDI40J16NW00013 Moore Salt Discretionary Occurrence
Union Gas 32-Powell No.1 MDI40J09NE00002 Zone Salt Discretionary Occurrence
Union Gas-Enniskillen No.9-E.McLean No.1 MDI40J16SW00006 Moore Salt Discretionary Occurrence
Volcanic G&O F1 Colchester South MDI40J02SW00015 Colchester Silica Sand Discretionary Occurrence
Warwick Brine Field MDI40I13NW00002 Warwick Salt Past Producing Mine Without Reserves or Resources
William R Barnes Co.-Halton Hills Quarry MDI30M12SW00013 Esquesing Sandstone, Sandstone (Silica) Past Producing Mine Without Reserves or Resources
William R Barnes Company - Milton Quarry MDI30M12SW00014 Nassagaweya Sandstone (Silica) Developed Prospect Without Reported Reserves or Resources
Yuil MDI31F01NE00010 Ramsay Marble (Structural Material) Discretionary Occurrence

Property Visits
Company Property Township or Area Commodity Comments


For further information contact the Southern Ontario District Resident Geologist Office

Updated May 2025