Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Deposit: MDI52J02SE00025

General

Commodities

Primary Commodities: gold

Location

Township or Area: Squash Lake Area

Latitude: 50° 2' 57.82"    Longitude: -90° 35' 55.32"

UTM Zone: 15    Easting: 671909   Northing: 5546885    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52J02SE

Point Location Description: Trenches on map in assessment report 52J02SE8655

Location Method: based on assessment

Source Map: OGS 1980 MAP 2420 SQUAW LAKE

Sources Map Scale: 1:25 000

Access Description: Light aircraft can land on Belmore Lake under favourable conditions in summer. Access to the south end of Belmore Bay is possible by boat in summer and snowmobile in winter. Much of the area is covered by cut-over and blow-down. Access where logging trails have been cut is possible. It is advisable to consult recent air photographs if overland travel is planned in this area.

Exploration and Mining History

1936: Coniagas Mines Limited conducted trenching and drilled 3 x-ray holes. 1937: Prior to the summer of 1937, 3 additional holes were drilled by Mr. Anderson. 1955: An additional 10 EX holes totalling approximately 425 m were reported to have been drilled by Mr. Anderson. 1986: Falconbridge acquired the property and carried out geological mapping, and cleaning out and sampling of old trenches. 1996: Royal Oak Mines carried out trenching and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Sturgeon Lake

Geological Age: Archean   

Mineral Deposit Lithology

Mineralization

Mineralization Comments

02/02/2000 (R Tuomi) - Trenching and drilling programs over a fifty year period were concentrated on patent HW 712, which was restaked as TB 61879 and now is roughly equivalent to Pa 816312. The trenched area is underlain by fine grained to porphyritic diorite. The diorite intrusions are flanked by massive mafic metavolcanic flows and are intruded by quartz feldspar dikes. The area has undergone several deformational events recorded in multiphase folding. The earliest event produced a regional foliation which trends 030 degrees to 060 degrees and dips between 50 degrees to 70 degrees to the southeast. The second generation of folds have subvertical fold axes and have developed along and across the primary foliation (Trowell, 1971). The third generation of folds are minor kink folds. The second and third fold styles are rare in the deposit area. A few minor faults are present and produce shear zones trending 150 degrees with a dip of 79 degrees to the northeast. All the mineralization found to date has occurred in quartz veins intruding diorite. Only the quartz carries gold values along with minor amounts of pyrite. The diorite walls of the veins carry minor pyrite with calcite and ankerite. Most of the trenches sampled by Falconbridge Ltd. in 1986-87 carried sub-economic gold contents of 2 g per tonne or less. Trench 8 was an exception, assays from a milky white vein have ranged from 1.5 to 366 g gold per tonne.

04/15/2020 (T Pettigrew) - Royal Oak’s stripped area #1 corresponds to the location where Falconbridge had a soil sample that returned 9300 ppb Au. A piece of 2" wide rusty quartz vein material from an area of rubble at the bottom of the outcrop (where it enters the swamp) was found at the location of the anomalous soil sample. A grab sample taken from vein material averaged 0.158 opt Au (4.91 ppm Au), a grab sample from the wallrock averaged 0.003 opt Au (0.09 ppm Au). Royal Oak’s stripped area #3 is an area cleared off for about 130 feet long and 70 feet wide. It exposes the area where most of the historical work was done on the property, and several quartz veins are easily seen. The underlying bedrock is a fine-grained massive chloritic green diorite as seen in area No. 2. A minor amount of quartz-feldspar porphyry is also exposed here. Structurally, this area is quite complex. The dominant feature is a 5 foot wide shear zone consisting of a pyritic, chlorite-ankerite schist trending at 45-90 degrees. Within this zone is a series of discontinuous quartz veins typically 6-10" wide, which are ribbon textured, and contain trace amounts of sulphides (pyrite-pyrrhotite). Where fully exposed, these vein segments are 5-15 feet long and end abruptly in the chlorite-ankerite schist. A second, weaker fabric is developed at 90 degrees, and several discontinuous veins similar to those described above are also found at this orientation. Barren quartz veins with horsetail margins are also exposed, and appear to be controlled by the 90 degree foliation. The wallrock is moderately foliated, contains patches of weak ankerite, and contains trace – 1% pyrite. Shear Zones in Area No. 3, mapped as pyritic chlorite-ankerite schist, and often containing quartz veins with horsetail margins, contained gold values in the 0.032 opt to 0.070 opt. (1-2.1 ppm Au) range (Assessment report 52J02SE0011). A sample collected by OGS staff in August 1993 froma small pit closest to the quartz dome gave an assay of 0.375 oz/t Au (12.86 g/t Au) (Janes et al., 1994).

References

Publication - Sioux Lookout Resident Geologist’s District - 1993; In: Report of Activities 1993, Resident Geologists, p. 118-120

Publication Number: OFR5892    Date: 1994

Author: Janes, D.A., Seim, G.W., Hinz, P., Storey, C.C.

Publisher Name: OGS

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Ministry Contact Information

For detailed information regarding this mineral deposit please contact the Kenora Resident Geologist District Office