Ontario Geological Survey
Permanent Link to this Record:
MDI42L05NW00003
| Record Name(s) | B4-7 Deposit - 2000, Junior Lake Project - 2000, International Mogul - 1983, Juneau Lake - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1983-Feb-15 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Nickel
Secondary Commodities: Platinum, Palladium, Gold, Cobalt
Township or Area: Junior Lake Area
Latitude: 50° 22' 47.97" Longitude: -87° 56' 49.62"
UTM Zone: 16 Easting: 432660 Northing: 5581310.01 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L05NW
Point Location Description: General
Location Method: Data Compilation
Access Description: Approx. 255 km NNE from Thunder Bay and 80 km east of Armstrong. Access from Armstrong along haulage roads. Skidder and drill roads provide access on the property.
1968: Canadian Dyno Mines Ltd. staked 333 claims to cover conductors detected by an airborne EM and MAG survey, including the B3 and B4 claim groups. Canadian Dyno Mines merged with Mogul Mines Ltd. to form International Mogul Mines. Prospecting, mapping, mag and EM surveys, soil sampling, and trenching was carried out on the B3 and B4 claim groups. 1969: 8 DDH totalling 674.8 m were drilled to test conductors and found the B4-7 zone. The B4-7 zone was delineated by 30 DDH totalling 6850 m and a detailed ground-based MAG and EM survey was completed. 300 lb of drill core was composited from 71 assay rejects in 11 drill holes, split to 125 lb and submitted for metallurgical testing. A manual tonnage/grade estimate was carried out. 1970: Coldstream Mines Ltd. acquired 100% of the property and took two claims to lease in 1976. 1990: Conwest Exploration Co. Ltd. (the successor to Coldstream Mines Ltd.) optioned the leases covering the B4-7 deposit to Menacorp Ltd., which resampled the B4-7 core. 1993: Conwest optioned the B4-7 leases to Minatco Exploration Ltd. 1998: Landore Resources optioned part of the property from North Coldstream Mines Ltd. 2000: Landore optioned additional claims from Brancote Canada. 2001: 21 DDH program totalling 5405 m was completed. 2003: 4 DDH program totalling 480 m was completed. 2006: 7 DDH program totalling 1562 m was completed. 2007: 16 DDH program totalling 3580 m was completed. 2009: 44 DDH totalling 9286 was completed. 2011: 10 DDH program totalling 4911 m was completed. 2007-2012: detailed geologic mapping, geophysical work including EM survey, ground magnetics, and reinterpretation and integration with historic magnetic data, line cutting, petrographic studies of the B4-7 deposit, reclogging, resampling and reinterpretation of the geology, surveying of drill collars, claim lines, claim staking, initiation of an environmental baseline study, aerial photography, and metallurgical testing. 2012: a deep penetrating DCIP and MT ground geophysical survey was performed over the Scorpion Zone (B4-7 and B4-8). Two DDH programs were undertaken - the first was 86 DDH totalling 15879 m and the second was 9 DDH totalling 4087 m. 2014-15: Landore drilled 20 DDH totalling 5265 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.13218 | 42L05SW0001 | 42L05SW0001 |
| 2.28008 | 42L05NW2016 | 42L05NW2016 |
| 2.7663 | 42L05SW0012 | 42L05SW0012 |
| 2.39741 | 20000005513 | 20000005513 |
| 2.39739 | 20000005499 | 20000005499 |
| 2.33957 | 20000001946 | 20000001946 |
| 2.33830 | 20000001851 | 20000001851 |
| 2.33694 | 20000001893 | 20000001893 |
| 2.36232 | 20000002811 | 20000002811 |
| 2.46224 | 20000013697 | 20000013697 |
| 11 | 42L05NW0006 | 42L05NW0006 |
| 2.32716 | 20000001507 | 20000001507 |
| 2.7916 | 52I08NE0004 | 52I08NE0004 |
| 2.20178 | 42L05NW2002 | 42L05NW2002 |
| 2.49300 | 20000007645 | 20000007645 |
| 2.20840 | 42L05NW2005 | 42L05NW2005 |
| 2.23889 | 42L05NW2013 | 42L05NW2013 |
Province: Superior
Subprovince: Wabigoon
Belt: Caribou Lake
Geological Age: Archean
Sep 29, 2014 (Therese Pettigrew) - There is a large WNW-trending deformation zone, the local portion of which is referred to as the Junior Lake Shear Zone, which is the most prominent structural feature in the area and is characterized by narrow discrete zones of intensely sheared rock displaying dextral rotation separated by relatively undeformed rock packages. The deformation zone can be seen as an aeromagnetic lineament which extends east and west of the Junior Lake property and appears to join the regional Sydney Lake-Lake St. Joseph Fault Zone to the north. Although the shear zone is slightly sinuous through Junior Lake, three of the mineral occurrences, Carrot Top, B4-7 and VW fall on a straight line. The length of the shear zone is uncertain, however a length of at least 10 km has been defined. Regional deformation is expressed as a west to WNW trending, subvertical to steeply north-dipping foliation and small-scale folding in the area and on most of the property. Regional metamorphism is lower amphibolite rank, increasing to amphibolite rank in the contact metamorphic aureoles of the batholiths. The B4-7 lithostratigraphic sequence is 1.9 km long and up to 400 m thick. It is composed of primarily mafic metavolcanic flows, gabbroic intrusive, and clastic and chemical metasediments (Pressacco, 2013).
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Gabbro | 1 | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pentlandite | Economic | Ore | ||||
| 5 | Gold | Economic | Ore | ||||
| 6 | Magnetite | Economic | Ore | ||||
| 8 | Sphalerite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Gangue | ||||
| 4 | Pyrite | Economic | Gangue | ||||
| 7 | Violarite | Economic | Gangue | ||||
| 9 | Covellite | Economic | Gangue |
Sep 29, 2014 (Therese Pettigrew) - The B4-7 Deposit is currently interpreted as a structurally modified, partly intrusive and partly replacement massive sulphide zone that has hanging wall disseminated and vein/veinlet style mineralization. The B4-7 Deposit consists of polymetallic Ni-Cu-Co+PGE+Au mineralization hosted in massive sulphide lenses with flanking disseminated/stringer sulphides in a gabbro/mafic metavolcanic setting coinciding with the Junior Lake shear zone. The strike length of the deposit has been traced by drilling for a distance of 600-700 m. Widths can achieve more than 10 m locally but are usually less than 5 m. The B4-7 massive sulphide system appears to be a fairly simple dilatational structure with a marked pinch-and-swell structure in the vertical dimension with an overall plunge to the west. B4-7 consists of a continuous tabular body of massive, semi-massive and disseminated pyrrhotite–rich sulphides hosted in an assemblage of mafic volcanics and mafic intrusive. The contacts of the massive sulphide are typically very sharp and linear with minor wall rock contamination. Host rocks include leucogabbro, melanogabbro, gabbro, as well as mafic metavolcanics at the east end. Proximal to the sulphide-mineralized zone are mafic schists, shear zones, metasedimentary rocks, locally iron formation, amphibolite, as well as pyroxenite, particularly at the east end. The Alpha Zone occurs parallel to and approximately 50 m updip of the B4-7 hanging wall in the gabbro and amphibolitized mafic volcanics. The zone is a broad envelope of narrow, moderate to high grade erratic, sulphide-rich carbonate and quartz carbonate veinlets and mineralized shears that generally trend oblique to stratigraphy. This hanging wall mineralization is localized in small fractures, foliations, and gashes. Mineralization in the B4-7 zone is composed of semi-massive to massive sulphides primarily composed of pyrrhotite (25%-75%), with minor pentlandite and chalcopyrite (1%-5%). Other sulphides include pyrite, violarite, sphalerite, and covellite. Magnetite concentrations are minor (1%-5%) to moderate (5%-25%) and generally occur where oxide iron formation is proximal to the zone walls. The pyrrhotite is fine grained and carries pentlandite and violarite exsolved as very fine grains (20 microns to 40 microns). Pentlandite occurs as relatively coarse grains as well as fine pentlandite flames. Nickel contents of up to 3% occur in the B4-7 lenses, whereas in the disseminated sulphides the nickel content is usually less than 1%. The disseminated style of blebby and network style mineralization is, however, generally much richer in PGEs, with up to 10 g/t Pd and up to 1 g/t Pt. Both Cu and Co occur as sulphides in both styles of mineralization. PGE mineral species are represented by kotulskite and borovskite, both palladium tellurides. Most of the chalcopyrite is concentrated as fine to medium grains near contacts, within fragment-rich portions of the zone, or as veins and stringers within the adjacent hanging wall and footwall rocks. Pyrite occurs as coarse cubes, up to three centimetres in diameter, that usually concentrate near the upper and lower contacts of the massive sulphide zone. Cobalt content correlates directly with the amount of coarse-grained pyrite. The discovery hole (DDH 69-5) intersected 8.26 m of massive pyrrhotite-pyrite-chacopyrite grading 0.80% Ni and 0.53% Cu. Drill hole 0407-167 intersected an average of 0.29% Ni, 0.12% Cu, 0.02% Co, 0.08 g/t Pt, 0.32 g/t Pd, and 0.01 g/t Au along a core length of 9.81 m (123.00 m to 132.82 m) and a second interval that averaged 0.22% Ni, 0.09% Cu, 0.01% Co, 0.47 g/t Pt, 2.40 Pd, and 0.01 g/t Au along a core length of 20.37 m (186.00 m to 206.39 m) (Pressacco, 2013).
| Rank | Classification |
|---|---|
| 1 | Epigenetic |
| 2 | Vein |
| Rank | Characteristic |
|---|---|
| 2 | Disseminated |
| 1 | Massive |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Alpha Zone – Open Pit | 2018 | Indicated Mineral Resource | 132000 | April 11, 2018 press release | 0.63% Ni equivalent | Cobalt 0.02 Percent, Copper 0.09 Percent, Gold 0.01 Grams per Tonne, Nickel 0.23 Percent, Palladium 0.99 Grams per Tonne, Platinum 0.18 Grams per Tonne |
| Total B4-7 and Alpha | 2018 | Inferred Mineral Resource | 568000 | April 11, 2018 press release | 1.26% Ni equivalent | Cobalt 0.05 %, Copper 0.52 %, Gold 0.03 g/t, Nickel 0.61 %, Palladium 0.5 g/t, Platinum 0.08 g/t |
| B4-7 Deposit – Underground | 2018 | Indicated Mineral Resource | 1520000 | April 11, 2018 press release | 1.25% Ni equivalent | Cobalt 0.06 Percent, Copper 0.45 Percent, Gold 0.03 Grams per Tonne, Nickel 0.65 Percent, Palladium 0.48 Grams per Tonne, Platinum 0.12 Grams per Tonne |
| B4-7 Deposit – Underground | 2018 | Inferred Mineral Resource | 568000 | April 11, 2018 press release | 1.26% Ni equivalent | Cobalt 0.05 Percent, Copper 0.52 Percent, Gold 0.03 Grams per Tonne, Nickel 0.61 Percent, Palladium 0.5 Grams per Tonne, Platinum 0.08 Grams per Tonne |
| B4-7 Deposit – Open Pit | 2018 | Indicated Mineral Resource | 1640000 | April 11, 2018 press release | 1.20% Ni equivalent | Cobalt 0.05 Percent, Copper 0.41 Percent, Gold 0.03 Percent, Nickel 0.62 Percent, Palladium 0.55 Grams per Tonne, Platinum 0.14 Grams per Tonne |
| Total B4-7 and Alpha | 2018 | Indicated Mineral Resource | 3292000 | April 11, 2018 press release | 1.20% Ni equivalent | Cobalt 0.05 %, Copper 0.42 %, Gold 0.03 g/t, Nickel 0.62 %, Palladium 0.53 g/t, Platinum 0.13 g/t |
| Alpha Zone – Open Pit | 2015 | Indicated Mineral Resource | 30000 | NI 43-101 (Oct 7, 2015) | 0.50% Ni equivalent | Cobalt 0.07 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.69 Percent, Palladium 0.93 Grams per Tonne, Platinum 0.15 Grams per Tonne |
| Total B4-7 and Alpha | 2015 | Indicated Mineral Resource | 2725000 | NI 43-101 (Oct 7, 2015) | 1.23% Ni equivalent | Cobalt 0.07 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.69 Percent, Palladium 0.55 Grams per Tonne, Platinum 0.14 Grams per Tonne |
| B4-7 Deposit – Underground | 2015 | Indicated Mineral Resource | 1846000 | NI 43-101 (Oct 7, 2015) | 1.24% Ni equivalent | Cobalt 0.07 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.7 Percent, Palladium 0.54 Grams per Tonne, Platinum 0.15 Grams per Tonne |
| B4-7 Deposit – Open Pit | 2015 | Indicated Mineral Resource | 849000 | NI 43-101 (Oct 7, 2015) | 1.22% Ni equivalent | Cobalt 0.06 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.69 Percent, Palladium 0.56 Grams per Tonne, Platinum 0.12 Grams per Tonne |
| B4-7 Deposit – Underground | 2013 | Indicated Mineral Resource | 1846000 | Technical Report on the Mineral Resource Estimate Update for the B4-7 Zone, Junior Lake Project, Ontario, Canada; NI 43-101 Report | 1.24% Ni equivalent | Cobalt 0.07 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.7 Percent, Palladium 0.54 Grams per Tonne, Platinum 0.15 Grams per Tonne |
| B4-7 Deposit – Open Pit | 2013 | Indicated Mineral Resource | 849000 | Technical Report on the Mineral Resource Estimate Update for the B4-7 Zone, Junior Lake Project, Ontario, Canada; NI 43-101 Report | 1.22% Ni equivalent | Cobalt 0.06 Percent, Copper 0.46 Percent, Gold 0.03 Grams per Tonne, Nickel 0.69 Percent, Palladium 0.56 Grams per Tonne, Platinum 0.12 Grams per Tonne |
| B4-7 Deposit | 2010 | Indicated Mineral Resource | 1998000 | Technical Report on the Mineral Resource Estimate Update for the B4-7 Zone, Junior Lake Project, Ontario, Canada; NI 43-101 Report | 1.06% Ni equivalent | Cobalt 0.07 Percent, Copper 0.434 Percent, Gold 32 Parts Per Billion, Nickel 0.672 Percent, Palladium 516 Parts Per Billion, Platinum 128 Parts Per Billion |
| B4-7 Deposit | 2008 | Unclassified | 2890000 | De Mark, P., and Glacken I., 2008: Landore: B4-7 Zone, Junior Lake Project, Ontario, Canada, mineral resource estimate; report #080609_V581_FINAL_Landore_TR_R_NI.docx, Snowden Group unpublished report, 44 p. | non-NI 43-101 compliant, 0.2% Ni cut-off grade, 0.59% Ni equivalent | Cobalt 0.04 Percent, Copper 0.3 Percent, Gold 0.03 Parts Per Million, Nickel 0.39 Percent, Palladium 0.3 Parts Per Million, Platinum 0.08 Parts Per Million |
| B4-7 Massive Sulphide Zone | 1969 | Unclassified | 2282520 | Zurowski, M. 1970: Report on the exploration activities in the Pikitigushi-Crescent-Toronto lakes area, Thunder Bay Mining Division, Province of Ontario for the calendar year 1969. Unpublished M.E.M. Consultants Limited report, October 19, 1970, 24 p. | non-NI 43-101 compliant, “drill indicated undiluted geological mineral reserves” | Copper 0.59 Percent, Nickel 0.87 Percent |
Map - Crescent Lake area, Thunder Bay District
Publication Number: M2100 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Technical Report on the Mineral Resource Estimate Update for the B4-7 Zone, Junior Lake Project, Ontario, Canada; NI 43-101 Report
Publication Number: 2013 43-101 Date: 2013
Author: Pressacco, R.
Publisher Name: RPA Inc.
Location:
Folio - Junior Lake area, District of Thunder Bay
Publication Number: GDIF014 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
Location:
Folio - Toronto Lake area, District of Thunder Bay
Publication Number: GDIF019 Date: 1997
Author: Thunder Bay RGO
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 - 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 - Precambrian geology, Toronto Lake area
Publication Number: P3167 Scale: 1:15,840 Date: 1991
Author: Berger B.R.
Publisher Name: Ontario Geological Survey
Location:
Map - Route map, Lake Nipigon to Albany River, districts of Thunder Bay and Kenora (Patricia Portion), Ontario
Publication Number: ARM38B-02 Scale: 1:253,440 Date: 1997
Author: Burwash E.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Kowkash gold area, District of Thunder Bay
Publication Number: ARM26A Scale: 1:126,720 Date: 1998
Author: Hopkins P.E., Todd E.W.
Publisher Name: Ontario Bureau of Mines
Location:
Map - Part of Thunder Bay District Showing the Kowkash Gold Area
Publication Number: ARM24C Scale: 1:500,000 Date: 1998
Author: Geological Survey of Canada, Dept. of Crown Lands, Canada, Hopkins P.E.
Publisher Name: Ontario Bureau of Mines
Location:
Map - Kowkash-Ogoki area, District of Thunder Bay, Ontario
Publication Number: ARM40F Scale: 1:126,720 Date: 1998
Author: Kindle L.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Kowkash gold area, District of Thunder Bay
Publication Number: ARM26A Scale: 1:126,720 Date: 1998
Author: Hopkins P.E., Todd E.W.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - Report of Activities 2011, Resident Geologist Program, Thunder Bay North Regional Resident Geologist Report: Thunder Bay North District
Publication Number: OFR6272 Date: 2012
Author: White G.D., Smyk M.C., Cooke A., Lockwood H.C., Wilson A.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2012, Resident Geologist Program, Thunder Bay North Regional Resident Geologist Report: Thunder Bay North District
Publication Number: OFR6284 Date: 2013
Author: White G.D., Cundari R.M., Lockwood H.C., Tuomi R.D., Debicki R.L., Moses P., Zurevinski S.E.
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2013, Resident Geologist Program, Thunder Bay North Regional Resident Geologist Report: Thunder Bay North District
Publication Number: OFR6292 Date: 2014
Author: White G.D., Cundari R.M., Tuomi R.D., Brunelle M.R., Debicki R.L., Moses P., Zurevinski S.E.
Publisher Name: Ontario Geological Survey
Location:
Publication - Technical Report on the Junior Lake Project, Ontario, Canada; NI 43-101 Report
Publication Number: 2015 43-101 Date: 2015
Author: Pressacco, R.
Publisher Name: RPA Inc. for Landore Resources Canada
Location: Landore website
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