Ontario Geological Survey
Permanent Link to this Record:
MDI41J14NW00014
| Record Name(s) | Seabrook Lake Rare Earth - 1955, Location A - 1961 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Sep-01 |
| Date Last Modified | 2023-May-25 |
| Created By | |
| Revised By |
Primary Commodities: Rare Earth Elements, Niobium
Secondary Commodities: Titanium
Township or Area: Maeck
Latitude: 46° 59' 33.95" Longitude: -83° 18' 15.19"
UTM Zone: 17 Easting: 324800 Northing: 5206937 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41J14NW
Point Location Description: Site 1 from Assessment report 20000020759
Location Method: Data Compilation
Access Description: On the west shore of Centre Bay of Seabrook Lake.
1955: W. Bussineau drilled 4 DDH totalling 173 m. 1957: F.R. Joubin carried out a geochemical soil survey and trenching. 1971: Canpac Minerals and Gunnex Ltd. cut a grid and carried out geological, geochemical, magnetometer and scintillometer surveys. 2012: TNR Gold Corp. carried out a soil sampling program. 2021: Transition Metals carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Maeck-0012-A1 | 41O03SW0002 | 41O03SW0002 |
| Maeck-0013-A1 | 41J14NW0004 | 41J14NW0004 |
| Maeck-0010-A1 | 41O03SW0004 | 41O03SW0004 |
| Maeck-0011-C1 | 20000018477 | 20000018477 |
| 5191 | 20000020759 | 20000020759 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Geological Age: Late Precambrian
Dec 07, 2005 (P Beach) - Columbium in magnetite rich carbonatite. This occurrence is within the Seabrook Lake Carbonatite Complex. The complex consists of carbonatite and ijolite. The carbonatite occurs in the northern part of the complex. The ijolitic rocks in the southern part vary in composition from pyroxenite to pegmatitic segragations of urtite. The main part of the complex is enveloped by an inner zone of fenitized granite breccia and an outer zone of fenitized granite. (OGS 1983 MDC 25 P 64).
May 25, 2023 (Therese Pettigrew) - The Seabrook Lake Carbonatite Complex has a K-Ar isotopic ages from biotite of 1109 and 1107 Ma and consists predominantly of carbonatite and ijolite. The carbonatite rocks are found in the northern portion of the complex, are highly variable in mineral content and texture, and are locally rich in hematite. Carbonate and biotite are the dominant minerals but pyroxene may locally be present in major quantities. South from the carbonatite rocks is an elongated body of ijolite, composed principally of nepheline and pyroxene. This rock unit is highly variable in composition changing from pyroxenite with <10% nepheline to pegmatitic segregations of urtite with >70% nepheline. The unit is massive, medium to coarse grained, equigranular, varying from black to dark green in the pyroxene-rich phases to pale pink in the urtite phases. In thin section most samples that were originally mapped in the field as pyroxenite contain sufficient nepheline to be classed asijolite with 30 to 70% nepheline.One sample contains sufficient potassium feldspar to be classed as malignite. Enveloping the carbonatite and ijolite rocksis a zone of fenitized granite breccia consisting of pink to red-brown clasts of altered granitic rock in a fine-grained dark matrix of altered and comminuted rock. Outward from the altered breccia is an up to 300 m zone of fenitized granite. Farther away from the complex the granite becomes increasingly less altered and fenitized. The granitic rocks, but notthe carbonatite complex, are cut by a set of northwest-striking diabase dikes. Small dikes of carbonate-rich rock and lamprophyre cutthe granitic rocksin several places (Sage, 1988).
| Rock Type | Rank | Composition | Texture | Relationship | Carbonatite-Unsubdivided | 1 |
|---|---|---|---|---|
| Ijolite | 2 |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrochlore | Economic | Ore | ||||
| 2 | Nepheline | Economic | Ore | ||||
| 1 | Magnetite | Economic | Gangue | ||||
| 2 | Hematite | Economic | Gangue | ||||
| 3 | Fluorite | Economic | Gangue | ||||
| 4 | Quartz | Economic | Gangue | ||||
| 5 | Carbonate | Economic | Gangue |
Dec 07, 2005 (P Beach) - Columbium is also present as well as an unknown radioactive mineral.
May 25, 2023 (Therese Pettigrew) - Samples collected by TNR Gold in 2012 returned 62.92 ppm TREO+Y and 10.2 ppm Nb. Samples collected by Transition Metals in 2021 returned up to 2564.38 ppm TREO+Y and 595 ppm Nb (Assessment report 20000020759).
May 25, 2023 (Sheree Hinz) - Samples of mafic breccia and calcite carbonates taken by G.E. Parsons in 1957 returned between 0.01-0.33% Nb2O5 (R003, p.20).
Map - Geological series, Operation Chapleau, Chapleau sheet, districts of Algoma and Sudbury
Publication Number: P0674 Scale: 1:126,720 Date: 1997
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Geology of carbonatite-alkalic rock complexes in Ontario: Seabrook Lake carbonatite complex, District of Algoma
Publication Number: S031 Date: 1988
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological compilation series, Rocky Island Lake-Biscotasing sheet, districts of Algoma and Sudbury
Publication Number: P0237 Scale: 1:126,720 Date: 1997
Author: Giblin P.E., Leahy E.J., Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Columbium (niobium) deposits of Ontario
Publication Number: MDC014 Page: 31-32 Date: 1971
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Chapleau, Algoma, Sudbury districts
Publication Number: M2352 Scale: 1:250,000 Date: 1977
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC025 Page: 64 Date: 1984
Author: Robertson J.A., Gould K.L.
Publisher Name: Ontario Geological Survey
Location:
Map - Seabrook Lake area, District of Algoma
Publication Number: M2005 Scale: 1:15,840 Date: 1997
Author: Parsons G.E.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Niobium-bearing complexes east of Lake Superior
Publication Number: R003 Page: 5-22 Date: 1997
Author: Parsons G.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Sault Ste. Marie-Elliot Lake sheet, geological compilation series, Algoma, Manitoulin and Sudbury districts
Publication Number: M2108 Date: 1967
Author: Giblin P.E., Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Geology of the Seabrook Lake carbonatite complex
Publication Number: OFR5414 Date: 1984
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Map - Sault Ste. Marie-Elliot Lake, geological compilation series, Algoma, Manitoulin and Sudbury districts
Publication Number: M2419 Scale: 1:253,440 Date: 1979
Author: Giblin P.E., Leahy E.J.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Chapleau area, districts of Algoma, Sudbury, and Cochrane
Publication Number: R157 Page: 111-114, 267-269 Date: 1977
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Operation Chapleau, part 1, general geology of the Shawmere anorthosite complex, part 2, geology of the Chapleau area, part 3, economic geology of the Chapleau area, districts of Algoma, Sudbury, and Cochrane
Publication Number: OFR5079 Page: 391-395 Date: 1997
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
Publication - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario
Publication Number: GSC OF 1087 Page: 123 Date: 1985
Author: Rose, D.G.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129999
Book - CAN. JOURNAL OF EARTH SCIENCES VOL 4 P 652-653
Publication Number: CJES Vol 4 Date: 1967
Author: Gittins, J., MacIntyre, R.M., York, D.
Publisher Name:
Location:
Journal - Rare earth elements in carbonatite and cogenetic alkaline rocks: Examples from Seabrook Lake and Callander Bay, Ontario; Contributions to Mineralogy and Petrology volume 65, no. 2
Publication Number: Cont MinPet V65 Page: 143-153 Date: 1977
Author: Cullers, R.L. and Medaris, G.
Publisher Name: Contributions to Mineralogy and Petrology
Location:
Thesis - Mineralogy, Geochemistry, and Petrology of a Pyrochlore-bearing Carbonatite at Seabrook Lake, Ontario, Canada
Publication Number: PhD Thesis Date: 1967
Author: Osatenko, M.J.
Publisher Name: University of British Columbia
Location: SSM RGP
Thesis - Petrogenesis of the Seabrook Lake Carbonatite Alkaline Complex, Northwestern Ontario
Publication Number: MSc Thesis Date: 1984
Author: Parbery, D.
Publisher Name: University of Western Ontario
Location: SSM RGP
Book - CANADIAN JOURNAL OF EARTH SCIENCES, VOL 29, NO. 6, P 1215-1223
Publication Number: CJES V 29 Date: 1992
Author: Symons, D.T.A.
Publisher Name:
Location:
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