Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E05SW00019

Record: MDI42E05SW00019

General

Commodities

Primary Commodities: Lithium

Location

Township or Area: Barbara Lake Area

Latitude: 49° 18' 2.4"    Longitude: -87° 55' 46.73"

UTM Zone: 16    Easting: 432414   Northing: 5461296    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42E05SW

Point Location Description: 2018 drill holes

Location Method: Data Compilation

Access Description: The Jackpot can be accessed by helicopter from Thunder Bay to the property a distance of approximately 140 km northeast of the city. Under ideal dry conditions an alternate means of access is to drive 37 km north of the town of Nipigon on TransCanada Highway 11, then drive 3.7 km from the highway and turn left, then turn left at kilometre 5.9. Att 8.7 km thee is a new road on the left, but continue straight to 10.5 km from highway where an old stream crossing. An ATV is required from this point to reach the showing. Georgia Lake.

Exploration History

1955: property staked by Conwest Exploration Company Ltd., who conducted prospecting, trenching, sampling, line cutting and drilled 32 DDH totalling 10,648.8 ft. 1956: property was transferred to the Ontario Lithium Company Ltd. 1960: Jackpot claims were converted to leases. 2009: Staked by J.P. Rapski and S.H. Forbes. 2011: Canadian Copper Core optioned the property and commissioned Caracle Creek Consulting to undertake a prospecting program. Terraquest Ltd. flew a 416 km gradient mag and VLF survey. 2012: Golden Dory Resources Corp. conducted prospecting and sampling. 2015: Larry Salo and Don Mckinnon were contracted to prospect the area to the west of Jackpot on claim 4281948. 2017-18: Infinite Ore Corp. (formerly Infinite Lithium Corp.) carried out prospecting, sampling, and drilled 61 DDH totalling 9794 m. 2019: Infinite Ore contracted a LiDAR survey. 2022: Infinite Ore renamed to Imagine Lithium, carried out prospecting, sampling, and drilled over 6755 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Quetico

Geological Age: Archean  

Lithology

Lithology Comments

Sep 12, 2019 (Therese Pettigrew) - The property is underlain chiefly by metasediments, which strike 70 degrees NE to east. For the most part, they dip steeply north, but in a few localities, they dip vertically or steeply south. They are interrupted in several places by thin dykes and sills of white-weathering, pale-grey feldspar porphyry. Also cutting them are a prominent dyke, striking 10-20 degrees NE, of porphyritic diabase, and two flat-lying sheets of equigranular diabase. One diabase sheet overlies the metasediments, and its erosional remnants form prominent hills about the end of Georgia Lake. The second sheet of equigranular diabase, at least 100 feet thick, cuts the metasediments 100-115 feet below the surface. It was found in drillholes bored to test the Point lithium deposit, at the west end of and along the south shore of Georgia Lake. The Jackpot deposits are located about 6,000 feet southwest of Georgia Lake and about 2,000 feet north of Marrow Lake. The drilling in 1955 showed the outcrops to be merely erosional remnants, 20-30 feet thick, of a flat sheet of pegmatite (the No. 1 deposit) at the level of the present surface, and hence to be of little significance. But a second dyke (the No. 2 deposit), which is not exposed, was located below the first in the drillholes. This dyke was found to contain 2,000,000 tons of material estimated to have an average grade of 1.09 percent Li2O. It is the most important occurrence discovered on the property to date. The No. 2 pegmatite dyke, which was discovered by diamond-drilling, strikes about N65E and dips 15-25 degrees NW. It was intersected in the holes at intervals of 100-300 feet over a strike length of 700 feet and at intervals of 100-200 feet over a distance of 1,200 feet across the strike. It ranges from 13 to 65 feet, averaging approximately 36 feet, in vertical thickness. It is somewhat irregular in attitude, and to the northeast, along its strike, it appears to split into two bifurcating branches. The spodumene present is medium- to coarse-grained for the most part; it appears to be concentrated near the centre of the dyke, such that the lithia content of the pegmatite decreases outward, more rapidly towards the lower contact than the upper one. In several drillholes, the decrease in spodumene content towards the contacts was found to be accentuated by an increase in the muscovite content. In general, the spodumene present in the Jackpot deposits is unaltered. In DDH No. 424, however, a thin diabase dyke was located at a vertical depth of 229.5-300.0 feet. This dyke appears to strike N10-20W and to dip about 70 degrees W. In the pegmatite intersections close to it, in holes Nos. 417, 418, and 421, the spodumene present was found to be dark-coloured and hence highly sericitized (Pye, 1965).The spodumene-bearing pegmatites on the Jackpot property are hosted by quartz-mica schist. The pegmatites are zoned with an occasional aplite border zone, and common quartz-feldspar-mica outer zone and spodumene-bearing pegmatite inner zone. The outer zone is muscovite-rich, and the inner zone is spodumene-rich. The spodumene-bearing pegmatite contains up to 25 vol.% spodumene in hole 411 in the historic Conwest program (Assessment report 20000018558).

Mineralization

Mineralization Comments

Sep 12, 2019 (Therese Pettigrew) - Sample 1099406, collected in 2012 returned 1.61% Li and 557 ppm Rb. Sample 1099403 returned 1320 ppm Rb and 0.04% Li (Assessment report 20000007253). Samples collected in 2015 returned values of 0.01% to 2.82% Li2O (Assessment report 20000013930). The mineralogy of the spodumene pegmatites at Jackpot is relatively simple. The principal constituents are quartz, feldspar and spodumene with minor amounts of muscovite. Accessory minerals include apatite and beryl. The spodumene is very pale apple green color when fresh and is occasionally weathered to a pale cream color. The spodumene ranges in size from about ½ inch (=1.27 cm) to 2 ft (=0.61 m) long, with individual crystals of feldspar and spodumene usually have a random arrangement. The best intercept from the 2017-18 drill program intercepted 7.23 m averaging 2.47% Li2O, near surface at depth of 2.20 m in Dike #1. The thickest intercept was in hole J-18-10 from a depth of 74.10 meters, which returned 0.85% Li2O, over a width of 12.00 meters in Dike # 2 (Assessment report 20000018558). DDH JP-2022-21C returned 1.16 wt% Li2O over 21 m (Imagine Lithium news release Oct 19, 2022). Grab sampling carried out in 2022 returned 0.39 to 6.15 wt% Li2O over a 3 km trend of sub-parallel spodumene-bearing pegmatite dykes (Imagine Lithium news release Sept. 7, 2022).

Mineral Record Details

Mineral Zones - Size and Shape

References

MonoMap - Geology and lithium deposits of Georgia Lake area, District of Thunder Bay

Publication Number: R031 Page: 99  Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Geology of Canadian Lithium Deposits; Geological Survey of Canada, Economic Geology Report 21

Publication Number: Econ Geol 21 Page: 58-59  Date: 1965

Author: Mulligan, R.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/102454

Map - Georgia Lake area, Thunder Bay District

Publication Number: M2056 Scale: 1:63,360    Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Precambrian Geology Compilation Series - Longlac Sheet

Publication Number: M2667 Scale: 1:250,000    Date: 2003

Author: Johns G.W., McIlraith S.J., Stott G.M.

Publisher Name: Ontario Geological Survey

Location:

Map - Red Rock-Pine Portage sheet, District of Thunder Bay, geological compilation series

Publication Number: P0357 Scale: 1:126,720    Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Georgia Lake area, District of Thunder Bay

Publication Number: P0092 Scale: 1:31,680    Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

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