Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C13SW00044

Record: MDI42C13SW00044

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Zinc

Location

Township or Area: Wabikoba Lake Area

Latitude: 48° 50' .35"    Longitude: -85° 45' 54.69"

UTM Zone: 16    Easting: 590616.83   Northing: 5409674.53    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42C13SW

Point Location Description: Trench QT-10

Location Method: Field Visit

Access Description: The Qued QT-10 gold occurrence is located approximately 31.75 km south-southeast of Manitouwadge, 2.6 km west of Theresa Lake and 2.5 km south of the southernmost tip of Dead Otter Lake. The Hemlo gold deposit is located approximately 18 km to the southwest. The occurrence is accessible via motor vehicle. From Manitouwadge, proceed south along Highway 614 for approximately 40 km to the Twist Lake road. Proceed northeast along the Twist Lake road for approximately 8.1 km to where a 785 m long, north-trending trench (Qued Resources' Limited trench QT-01) crosses the road. Proceed north along this trench for approximately 50 m to an area of deeper blasting referred to by Qued Resources Limited as trench QT-10. A locally sericitic, sulphide- and gold-bearing, quartz-feldspar porphyry sill is exposed in the southern portion of this trench. The sill hosting the gold is also exposed in a northeast-trending trench (possibly dug by Noranda) located along the north side of the Twist Lake road approximately 50 m to the east of trench QT-10. Much of the area surrounding this roadside trench has been stripped of overburden and the rock exposure is excellent.

Exploration History

1957: Geological mapping; CPR (M. Bartley, T. Page). 1964-1965: Geological mapping; ODM (V.G. Milne). 1966: Ground geophysical survey (MAG); Falconbridge Nickel Mines Ltd. 1967-1969: Diamond drilling (19 holes); Falconbridge Nickel Mines Ltd. Hole (31-1-67), collared in the vicinity of the occurrence, intersected numerous zones up to 10 feet wide containing up to 10% py, po and cpy. 1976: Airborne geophysical survey (Questor), Line cutting, reconnaissance geological mapping and ground geophysical surveys (MAG, EM); Noranda Mines Ltd. Several weak conductors, most without significant magnetic association, were outlined in the vicinity of the occurrence. 1978-1979: Lake sediment and water geochemical sampling; GSC and MNR. Samples collected from the vicinity of the occurrence contained slightly anomalous amounts of Cu, Zn, Au and Mo. 1982-1984: Line cutting, ground geophysical surveys (EM,VLF, and IP), soil and lithogeochemical sampling, geological mapping, trenching (15 trenches totalling 634 m) and diamond drilling (14 holes totalling 2018 m); Qued Resources Ltd. The occurrence was exposed in trench QT-10. 1983: Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. 1984: Geological mapping; OGS (G.M. Siragusa). 1991: Reconnaissance till sampling; GSC (I.M. Kettles). Samples collected in the general vicinity of the occurrence were found to contain slightly anomalous amounts of Cu and Zn. 1992: Line cutting, ground geophysical surveys (MAG, VLF-EM); Placer Dome Inc. Several conductive horizons attributed to sulphide mineralization were outlined. 1993: Lithogeochemical sampling; OGS (D.B. McKay).

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Amphibolite

Geology Comments

Dec 07, 2005 (D McKay) - The Qued QT-10 gold occurrence is located in the Wawa subprovince approximately 18 km northeast of the Hemlo mines. The area surrounding the occurrence is underlain primarily by an east-southeasterly-trending sequence of mafic to felsic metavolcanic and lesser metasedimentary rocks which comprise a portion of the the north limb of the Schreiber-Hemlo greenstone belt (Milne 1968, Map 2147; Siragusa 1985, Map P.2738). In the vicinity of the occurrence, emplacement of the Dotted Lake Batholith has folded the belt into a large easterly-plunging anticline (Milne 1968, Map 2147). The occurrence is located along the south limb of this structure. The supracrustal rocks in this area are locally strongly foliated (100 to 115 degrees /85 degrees SW) and mineral assemblages indicate they have experienced lower amphibolite facies-grade regional metamorphism (Milne 1968; Barry 1983). In the vicinity of the occurrence, the supracrustal sequence is approximately 3.5 km wide and is bounded to the north and south by granodioritic rocks of the Dotted Lake Batholith and the Musher Lake Pluton, respectively (Milne 1968, Map 2147). The northern portion of the belt is dominated by massive to pillowed basalts which are overlain to the south by intermediate to felsic pyroclastic rocks containing minor metasedimentary interbeds (Milne 1968; Cavey and Dumouchel 1985). The supracrustal sequence dips steeply to the southwest and has been interpreted to young in the same direction (Milne 1968; Cavey and Dumouchel 1985). The occurrence is located near the southern boundary of the belt approximately 1.2 km north of the contact with the Musher Lake Pluton. In the vicinity of the occurrence, 3 parallel, east-southeast- trending, interflow metasedimentary units (iron formations) have been recognized (Cavey and Dumouchel 1985). The Qued QT-10 gold occurrence is hosted within a q-fel porphyry sill located adjacent to the southernmost metasedimentary unit.

Lithology

Lithology Comments

Dec 07, 2005 (D McKay) - The general stratigraphic sequence exposed in trench QT-10 consists of an iron rich metasedimentary horizon found along the contact of older mafic metavolcanic flows to the north and a younger q-fel porphyry sill to the south. The QT-10 gold occurrence is hosted in the q-fel porphyry sill. This sill is approximately 20 m wide where exposed in trench QT-10 and is typically buff-weathering, light gray, relatively massive, medium- to coarse-grained and contains numerous, rounded eyes of quartz varying in size up to 3 mm across. The porphyry becomes markedly sericitic proximal to its northern contact with the mafic metavolcanic rocks. A narrow (0.5 m wide), rusty-weathering shear zone trending approximately 130 degrees and dipping 70 degrees to the southwest is located 9 m south of this contact.

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - Pyrite generally constitutes less than 1% of the porphyry and occurs as fine- to coarse-grained disseminated grains. Grab samples of sheared, sericitic and weakly pyritic porphyry collected from the occurrence by M. Smyk in 1991 for the OGS returned assay values of up to 0.05 ounce Au per ton. Grab samples of similar material collected from the occurrence by D. McKay in 1993 for the OGS returned assay values of 0.006 and 0.04 ounce Au per ton.

Mar 27, 2019 (Therese Pettigrew) - The sericitic quartz-feldspar porphyry sill assayed 1.03 to 1.71 ppm Au. A nearby BIF returned assays up to 0.132% Zn (Muir, 2000).

Alteration Comments

Dec 07, 2005 (D McKay) - The porphyry becomes markedly sericitic proximal to its northern contact with the mafic metavolcanic rocks.

Mineral Record Details

References

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date: 1983

Author: Cavey, G.

Publisher Name:

Location: Thunder Bay RGP

Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt

Publication Number: M2614 Scale: 1:50,000    Date: 2000

Author: Muir T.L.

Publisher Name: Ontario Geological Survey

Location:

Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3

Publication Number: OFR5906 Page: 195-202  Date: 1994

Author: McKay D.B.

Publisher Name: Ontario Geological Survey

Location:

Map - White Lake sheet, Thunder Bay District

Publication Number: M2147 Scale: 1:31,680    Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Black River area, District of Thunder Bay

Publication Number: R072 Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Reconnaissance Geochemical Data for Till Samples from the Manitouwadge Area, Ontario

Publication Number: OF 2616 Date: 1993

Author: Kettles, I.M.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/183942

Article - Schreiber-Hemlo Resident Geologist's District - 1990

Publication Number: MP152.007 Page: 159  Date: 1997

Author: Schnieders B.R., Smyk M.C., Hinz P.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Precambrian geology, Lumby Lake area, western part, Kenora District

Publication Number: P2828 Scale: 1:15,840    Date: 1985

Author: Jackson M.C., Chevalier P.

Publisher Name: Ontario Geological Survey

Location:

Map - Black River area, southeast part, District of Thunder Bay

Publication Number: P0335 Scale: 1:31,680    Date: 1997

Author: Milne V.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