Ontario Geological Survey
Permanent Link to this Record:
MDI31F06NE00017
| Record Name(s) | Radnor Mine - 1901, Grattan Deposit - 1980, Larmond Property - 1950 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1981-Mar-24 |
| Date Last Modified | 2022-May-11 |
| Created By | |
| Revised By |
Primary Commodities: Magnetite
Township or Area: Grattan
Latitude: 45° 26' 11.76" Longitude: -77° 1' 10.82"
UTM Zone: 18 Easting: 342033.002 Northing: 5033436.997 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F06NE
Point Location Description: trench
Location Method: Data Compilation
Access Description: From junction of highway 132 and 41, drive north on 41 for 5.7 km turning right on Constant Lake road. Park by locked gate on north side, 500m east of hwy 41. Walk north on overgrown road deteriorating to bush trail.
1901-1907: Canada Iron Furnace Company: DD, operated almost continuously at this time and shipped about 18,824 net tons of ore (48 % Fe) to Radnor Forges, Quebec. There was some drilling in 1900 and 1904. No work is reported on the Parks property. 1950: Algoma Ore Properties Limited - mapping, ground geophysics, DD
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Hornblende-Plagioclase | Contains |
|---|---|---|---|---|
| Feldspathic Wacke | 2 | Feldspathic Arenite | Host | |
| Pegmatite | 3 | Granite | Intrudes | |
| Syenite | 4 | Syenite | Intrudes | |
| Anorthosite | 5 | Intrudes |
Jun 02, 2011 (A Wilson) - A long sinuous band of gneiss is included within metamorphosed feldspathic arenite. Both are cut by pegmatitic granite and coarse syenite dikes, some of which are 25 feet wide. Ore-grade mineralization is found in the arenite. The arenite is gently folded and the fold axis plunges at 30° and trends S23W. Shearing was observed in the northern part of the deposit and is characterized by non-coherent hornblende-plagioclase gneiss containing lenses of unsheared rock. Mining was conducted on a series of 8 open cut pits that followed the semi-circular trend of the ore.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Magnetite | Economic | Ore | ||||
| 2 | Jarosite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Titanite | Economic | Ore | ||||
| 5 | Zircon | Economic | Gangue |
Jun 02, 2011 (C Papertzian) - Disseminated magnetite is contained within 3 orebodies that form a nearly continuous, narrow zone about 8,000 ft in length and 15-34 ft wide. Drilling has proven reserves of 3,639,600 tons to a vein depth of 363 ft and indicated reserves of 9,099,000 tons to a vertical depth of 600 ft with an average grade of 27.74 % Fe.
Jun 02, 2011 (A Wilson) - The ore is coarse-grained granular magnetite and occurred in narrow lenses ranging from 4 to 25 feet thick. The ore-lenses are found en-echelon over a distance of approximately 400 m. The series of outcrops formed a rough semi-circle towards the centre of which the ore deposit dips 35°. Bands and lenses of magnetite are conformable with the gneissosity in the arenite and gneiss. Magnetite occurs within the gneiss as disseminations, stringers and bands that are, in places, of ore grade. Small clots and crystals of magnetite also occur in the pegmatite dikes. An average analysis of the ore, as reported by the Ontario Bureau of Mines in 1907, was 47.5% Fe, 19.5% SiO2, and 0.25% S. A grab sample of magnetite collected by J. Satterly returned 0.09% V. The shipping ore had an iron content of 48% and upwards; all leaner ore was left in stock at the mine. A grab sample collected from the property by the OGS in 1978, returned 41.9% Fe (tot), 39.9% Fe (sol), 21.3% FeO, 1.34% TiO2, 0.46% P2O5, 1.49% S, and 0.07% V.
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 914 | 10 | 183 | R209 |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| A orebody | 1951 | Proven | 3301790 | Gilbert, G.S., A Report on the Renfrew Magnetite Property; Algoma Steel Corporation, Ltd., unpublished company files, Sault Ste. Marie, Ontario 1951. | Iron 27.74 Percent | |
| A Zone 600 ft | 1951 | Indicated Mineral Resource | 8254474 | MRC020, p98 | To a depth of 600 feet. | Iron 27.74 Percent |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1907 | 17073 |
Iron Percent |
MDC020, p 98-102 | Average analysis of ore shipped was 47.5% Fe (R209, p50); total production between 1901 and 1907 |
Publication - Iron deposits of eastern Ontario and adjoining Quebec; Geological Survey of Canada, Bulletin 45
Publication Number: GSC Bulletin 45 Page: 49-50 Date: 1958
Author: Rose, E.R.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100563
Part - Mineral occurrences in the Renfrew area
Publication Number: ARV53-03 Page: 51, 59-60 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of base metal, precious metal, iron, and molybdenum deposits in the Pembroke-Renfrew area
Publication Number: MDC020 Page: 98-102 Date: 1980
Author: Carter T.R., Colvine A.C., Meyn H.D.
Publisher Name: Ontario Geological Survey
Location:
Mono - Metallogeny of the Grenville Province, southeastern Ontario
Publication Number: OFR5515 Page: 88 Date: 1984
Author: Carter T.R.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Clontarf area, Renfrew County
Publication Number: R209 Page: 50-51 Date: 1981
Author: Themistocleous S.G.
Publisher Name: Ontario Geological Survey
Location:
Publication - Catalogue of Canadian minerals [1980]; Geological Survey of Canada, Paper 80-18
Publication Number: Paper 80-18 Page: 207, 226 Date: 1983
Author: Traill, R.J.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/119519
Book - Resident Geologist File (Bancroft - Meyn)
Publication Number: Date: 1981
Author:
Publisher Name:
Location: Tweed RGO
Publication - Iron ore occurrences in Canada; Canada Mines Branch, Publication 217
Publication Number: CMB Pub 217 Page: 124-125 Date: 1917
Author: Lindeman, M E; Bolton, L L; Robinson, A H A
Publisher Name: Canada Mines Branch
Location: https://doi.org/10.4095/305364
Part - The mines of Ontario
Publication Number: ARV11.016 Date: 1998
Author: Carter W.E.H.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 321 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Book - Titanium; Canada Department of Mines, Mines Branch Report No. 579
Publication Number: Report 579 Page: 76 Date: 1922
Author: Robinson, A.H.A.
Publisher Name: Canadian Dept. of Mines, Mines Branch
Location: https://doi.org/10.4095/307776
Mono - Report Of The Ontario Iron Ore Committee With Appendix 1923
Publication Number: NSP013 Page: 223 Date: 1998
Author:
Publisher Name:
Location:
Publication - Rocks and Minerals for the Collector, Ottawa to North Bay, Ontario; Hull to Waltham, Quebec; Geological Survey of Canada, Paper no. 70-50
Publication Number: Paper 70-50 Page: 26-27 Date: 1971
Author: Sabina, A.P.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102463
Part - The iron and steel industry of Ontario
Publication Number: ARV17.007 Date: 1998
Author: Mackenzie G.C.
Publisher Name: Ontario Bureau of Mines
Location:
Part - Mines of eastern Ontario
Publication Number: ARV12.007 Date: 1998
Author: Carter W.E.H.
Publisher Name: Ontario Bureau of Mines
Location:
Part - Mines of eastern Ontario
Publication Number: ARV13-01.006 Date: 1998
Author: Miller W.G.
Publisher Name: Ontario Bureau of Mines
Location:
Part - Mines of eastern Ontario
Publication Number: ARV14-01.004 Date: 1998
Author: Corkill E.T.
Publisher Name: Ontario Bureau of Mines
Location:
Part - Mines of Ontario
Publication Number: ARV15-01.003 Page: 95 Date: 1998
Author: Corkill E.T.
Publisher Name: Ontario Bureau of Mines
Location:
Part - Mines of Ontario
Publication Number: ARV16-01.003 Page: 80-82 Date: 1998
Author: Corkill E.T.
Publisher Name: Ontario Bureau of Mines
Location:
Map - Clontarf, Renfrew County
Publication Number: M2433 Scale: 1:31,680 Date: 1980
Author: Themistocleous S.G.
Publisher Name: Ontario Geological Survey
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office