Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001765

Record: MDI000000001765

General

Commodities

Primary Commodities: Palladium, Copper, Nickel, Platinum

Secondary Commodities: Cobalt

Location

Township or Area: Falcon Lake Area

Latitude: 50° 23' 49.8"    Longitude: -88° 3' 46.4"

UTM Zone: 16    Easting: 424456   Northing: 5583331    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52I08NE

Point Location Description: Point located from 2003 drilling program assessment report (MacTavish 2004, AFRI 42L05NW2016).

Location Method: Based on Assessment

Exploration History

1999: Discovery of the Carrot Top Zone by prospecting by Steve and Mick Stares for Inco Ltd. 2000: trenching by Norcal. 2001: sampling by Landore. 2003: sampling by Landore. 2005: Landore conducted a linecutting and 11 DDH program totalling 1660 m. 2008: Landore drilled a 7 DDH program totalling 1302 m. 2010: Landore drilled a 7 DDH program totalling 1101 m. 2022: Landore drilled 11 DDH totalling 1889 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Caribou Lake

Geological Age: Archean  

Geology Comments

Sep 30, 2014 (Therese Pettigrew) - The laterally extensive Carrot Top sequence trends WNW and is comprised of magnetic talc-carbonate-chlorite +/-tremolite schists derived from deformed and altered ultramafic rocks and clastic and chemical metasedimentary rocks. The sequence is 300-600 m thick. Strong centimetre- to metre-scale folding is evident in the iron formation. Narrow, discrete zones of intense shearing (Junior Lake Shear Zone) form a corridor up to 800 m wide along the contact between the Toronto Lake Group and the Marshall Lake Group, roughly following the north contact of the Grassy Pond Sill. Although the shear zone is slightly sinuous, three of the mineral occurrences (Carrot Top, B4-7 and VW) fall on a straight line. The length of the shear zone is uncertain but a length of at least 10 km has been defined. A relatively undeformed lithon of fine-grained peridotite to dunite was observed at the Carrot Top Occurrence. The sequence appears to truncate near North Lamaune Lake to the NW, but may be continuous with and genetically related to the Toronto Lake Mafic-Ultramafic complex, located 1.5 km SE of the Junior Lake Property (MacTavish, 2004 AFRI 42L05NW2016). The Carrot Top Occurrence is adjacent to a granitic batholith (McKay 2005, AFRI 20000001276).

Lithology

Mineralization

Mineralization Comments

Sep 30, 2014 (Therese Pettigrew) - Samples collected in 1999 contained up to 1200 ppb Pd, 260 ppb Pt, 0.34% Cu, 0.33% Ni, and 200 ppm Co. Trenching in 2000 exposed a fine-grained, serpentinized peridotite, in contact with a folded iron formation, that contained 1-10% finely disseminated to locally net-textured pyrrhotite, pyrite and chalcopyrite. A single grab sample from the trench contained 597 ppb Pd, 79 ppb Pt, 6760 ppm Cu, and 3980 pm Ni. A group of 7 channel samples taken across the occurrence in 2000 graded 542 ppb Pd, 123 ppm Pt, 0.32% Cu, 0.32% Ni, and 0.03% Co/7.00 m. Three Landore 2001 samples contained up to 550 ppb Pd, 103 ppb Pt, 3830 ppm Cu, 2460 ppm Ni, and 410 ppm Co. Two Landore 2003 samples graded 581 ppb Pd, 78 ppb Pt, 2131 ppm Cu, 3048 ppm Ni, 332 ppm Co, and 223 ppb Pd, 78 ppb Pt, 3765 ppm Cu 1362 ppm Ni, and 166 ppm Co, respectively (MacTavish, 2004 AFRI 42L05NW2016). Mineralization occurs primarily as breccia and fracture filler with lesser amounts of net-textured, disseminated, laminated and veined sulphides. The Carrot Top Zone has been drill tested to a vertical depth of 120 m. The zone appears to dip steeply to the north and may be structurally controlled by the dominant E-W shearing (McKay 2005, AFRI 20000001276). DDH 1105-01: 2448 ppm Ni,1912 ppm Cu, 93 ppb Pt, 366 ppb Pd; DDH 1105-02: 1051 ppm Ni, 745 ppm Cu, 17 ppb Pt, 122 ppb Pd; DDH 1105-03: 1288 ppm Ni, 618 ppm Cu, 4 ppb Pt, 17 ppb Pd; DDH 1105-04: 1159 ppm Ni, 227 ppm Cu, 90 ppb Pt, 227 ppb Pd; DDH 1105-05: 1043 ppm Ni, 111 ppm Cu, 14 ppb Pt, 9 ppb Pd; DDH 1105-06: 1121 ppm Ni, 126 ppm Cu, 14 ppb Pt, 9 ppb Pd; DDH 1105-07: 1175 ppm Ni, 84 ppm Cu, 14 ppb Pt, 16 ppb Pd; DDH 1105-08: 1083 ppm Ni, 582 ppm Cu, 23 ppb, Pt, 118 ppb Pd; DDH 1105-09: 2114 ppm Ni, 2240 ppm Cu, 79 ppb Pt, 322 ppb Pd; DDH 1105-10: 2127 ppm Ni, 820 ppm Cu, 72 ppb Pt, 219 ppb Pd; DDH 1105-17: 1888 ppm Ni, 1372 ppm Cu, 17 ppb Pt, 172 ppb Pd (McKay 2005, AFRI 20000001276). Results from the 2008 program drilled narrow semi-massive to massive sulphide veins: DDH 1108-25: 1.29% Ni, 0.16% Cu, 1150 ppm Co, 1064 ppb Pd, 133 ppb Pt; DDH 1108-26: 1.44% Ni, 0.56% Cu, 1451 ppm Co, 1678 ppb Pd (Cheatle 2010, AFRI 2.45115). Results from the 2010 program included the following mineralized intersections: DDH 1110-102: 0.22% NI, 0.19% Cu, 341 ppb Pd; DDH 1110-103: 0.26% Ni, 0.08% Cu, 444 ppb Pd; DDH 1110-104 : 0.47% Ni, 0.08% Cu, 494 ppb Pd; DDH 1110-116 : 0.24% Ni, 0.08% Cu (Tuomi 2010, AFRI 20000006067).

Mineral Record Details

Mineral Zones - Size and Shape

References

Mono - Report of Activities 2005, Resident Geologist Program, Thunder Bay North Regional Resident Geologist Report: Thunder Bay North District

Publication Number: OFR6181 Date: 2006

Author: Smyk M.C., White G.D., Magee M.A., Komar C.L.

Publisher Name: Ontario Geological Survey

Location:

Map - Geology and Tectonostratigraphic Assemblages, eastern Wabigoon Subprovince, Ontario

Publication Number: P3449 Scale: 1:250,000    Date: 2002

Author: Stott G.M., Davis D.W., Parker J.R., Straub K.H., Tomlinson K.Y.

Publisher Name: Geological Survey of Canada, Ontario Geological Survey

Location:

Map - Crescent Lake area, Thunder Bay District

Publication Number: M2100 Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Precambrian Geology of the Caribou Lake Greenstone Belt, Northwestern Ontario

Publication Number: P3613 Scale: 1:50,000    Date: 2009

Author: MacDonald C.A., ter Meer M., Lowe D., Isaac C., Stott G.M.

Publisher Name: Ontario Geological Survey

Location:

Map - Compilation series, Mojikit Lake sheet, Thunder Bay District

Publication Number: P0267 Scale: 1:126,720    Date: 1997

Author: Stott G.M., McConnell C.D., Mason J.K.

Publisher Name: Ontario Geological Survey

Location:

Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts

Publication Number: M2102 Date: 1997

Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.

Publisher Name: Ontario Dept. of Mines

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office