Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42F04SE00011

Record: MDI42F04SE00011

General

Mineral Record Identification
Record Name(s)	Rawluk Lake - 1991, Peaccok Road - 2004, North Faries Lake Area - 2000
Related Record Type	Simple
Related Record(s)
Record Status	Occurrence
Date Created	1996-Dec-20
Date Last Modified	2023-Aug-03
Created By
Revised By

Commodities

Primary Commodities: Copper, Zinc, Palladium, Cobalt

Secondary Commodities: Nickel, Gold, Silver

Location

Township or Area: Cecil

Latitude: 49° 7' 21.28" Longitude: -85° 36' 26.92"

UTM Zone: 16 Easting: 601601 Northing: 5442016 UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42F04SE

Point Location Description: Large trench

Location Method: Field Visit

Access Description: The Rawluk Lake sulphide occurrence is located in Cecil Township approximately 16.5 km east-southeast of Manitouwadge and 600 m west of the northern end of Rawluk Lake. The occurrence is accessible via motor vehicle followed by travel on foot. From Manitouwadge, proceed east along the Camp 70 logging road for approximately 4.25 km to the Twist Lake road. Proceed south and east along the Twist Lake road for approximately 12.5 km to where the road makes a sharp bend to the south. Several lines of a grid cut in 1989 cross the road in this area. Proceed north and then east along this grid to station 14+00W on line 35+00S. Sulphide mineralization is exposed in a large (54 m long by 7.5 m wide by 1 m deep), northeast- trending trench located approximately 30 m north of this station near the centre of claim TB1101251.

Exploration History

1964-1965: Geological mapping; V.G. Milne (ODM). 1967: Geological maping; J. F. Giguere (ODM). 1978: Regional lake sediment and water geochemical survey; GSC-MNR. Samples collected in the vicinity of the occurrence contained slightly anomalous amounts of Cu. 1988: Reconnaissance-scale geological mapping and lithogeochemical sampling; Noranda Minerals Inc. (Geco Division). 1989: Line cutting, ground geophysical surveys (HLEM, MAG), geological mapping and lithogeochemical sampling; Noranda Minerals Inc. (Geco Division). Significant hydrothermal alteration, anomalous copper mineralization and associated magnetic highs were discovered in the vicinity of the occurrence. Geological mapping; H. Williams and F. Breaks (OGS). Dighem airborne geophysical survey (EM, MAG, VLF-EM); Noranda Exploration Company, Limited and Noranda Minerals Inc. (Geco Division). 1990: Stripping, trenching and diamond drilling (2 holes); Noranda Minerals Inc. (Geco Division). 1991: Reconnaissance till sampling program; I.M. Kettles (GSC). The property was examined (but not sampled) by D.B Mckay (OGS). 1997: prospectors G. Gionet and M. Gionet carried out beep-mat surveys, stripping and sampling. 1999: Noranda Inc. drilled 1 DDH totalling 183 m and conducted an EM survey. 2000: G. Gionet carried out trenching and sampling. 2004: G. Gionet carried out beep-mat surveys, prospecting, and trenching. 2007: G. Gionet carried out stripping. 2013: M. Stares optioned the property and carried out prospecting and sampling.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
2.19854	42F04SE2002	42F04SE2002
2.21822	42F04SE2003	42F04SE2003
2.19285	42F04SE2001	42F04SE2001
2.55044	20000008182	20000008182
2.19698	42F04NE2003	42F04NE2003
2.29798	20000000388	20000000388
2.36482	20000002531	20000002531

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Manitouwadge-Hornepayne

Geological Age: Archean

Metamorphism Type: Regional

Metamorphism Grade: Amphibolite

Geology Comments

Dec 07, 2005 (D McKay) - The occurrence is located within the Wawa Subprovince and is underlain primarily by a narrow (250 m wide), north-northeast-trending, homoclinal belt of locally altered mafic metavolcanic rocks intruded by numerous concordant anorthositic and gabbroic rocks of the Faries Lake-Moshkinabi Lake mafic intrusive complex (Charlton 1989, Williams and Breaks 1989, 1990). The mafic metavolcanic belt is bounded to the east and west by granodioritic orthogneiss of the Black-Pic batholith (Williams and Breaks 1990). The supracrustal rocks in the vicinity of the occurrence are strongly foliated (018 degrees /60 degrees E) and mineral assemblages suggest they have experienced upper amphibolite facies-grade regional metamorphism (Williams and Breaks 1989; Charlton 1989). These rocks may represent a portion of the eastward extension of the south limb of the Manitouwadge greenstone belt (Williams and Breaks 1989, 1990). Several northwest-trending diabase dikes occur in the vicinity of the occurrence (Charlton 1989; Williams and Breaks 1990).

Lithology

Lithology Data
Rock Type	Rank	Composition	Relationship
Diabase	1	Diabase Dike	Near
Anorthosite	2		Near
Schist-Unsubdivided	3	Chl-Mus-Gt-Ay Schist	Host

Lithology Comments

Dec 07, 2005 (D McKay) - Charlton (1989, p. 6) described the occurrence as follows: In the area between lines 15+00S and 40+00S around 13+00W, along a contact between anorthositic gabbro to the west and a mafic volcanic unit to the east, many rocks have been strongly hydrothermally altered. This altered zone extends for up to 2500 feet in length north-south and up to 200 feet in width. In this area the anorthosite appears to be altered to a muscovite rich, muscovite quartz feldspar schist with or without anthophyllite and or biotite. The mafic volcanic rock appears to be altered to an anthophyllite rich, anthophyllite hornblende feldspar quartz schist. Further east from the strongly altered rocks the volcanics generally grade into a 13j garnetiferous variety and then quickly into unaltered mafic volcanics. Most rocks in the area are strongly depleted in Na2O and enriched in MgO. Although no HLEM anomalies were found in this area, three magnetic highs on lines 35+00S, 40+00S and 15+00S were found to directly coincide with this zone.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking	Alteration Intensity	Alteration Style
1	Pyrite	Economic	Ore
	Garnet	Alteration		Hydrothermal	1	Unknown	Disseminated
	Anthophyllite	Alteration		Hydrothermal	2	Unknown	Disseminated
	Chlorite	Alteration		Hydrothermal	3	Unknown	Disseminated
	Muscovite	Alteration		Hydrothermal	4	Unknown	Disseminated

Mineralization Comments

Dec 07, 2005 (D McKay) - According to Charlton (1989): disseminated pyrite occurs locally within the altered mafic metavolcanics. A number of small weak gossans occur within the altered volcanics some of which were found to be anomalous in copper (up to 0.23%).

Oct 31, 2019 (Therese Pettigrew) - The main mineralized zone strikes roughly 180 degrees. Altered rocks may contain variable amounts of euhedral garnet, orthoamphibole, calc-silicates and sulphide minerals. The “main” mineralized zone is characterized by sugary, white, intensively silicified and feldspathized zones adjacent to podiform quartz veins. Fine-grained pyrite, pyrrhotite and chalcopyrite may be disseminated within altered rocks. Semi-massive, blebby sulphide minerals occur as foliation-parallel seams in sheared rocks and within quartz veins. Virtually all sulphide-bearing rocks exhibit a positive response to dimethyl glyoxime (a.k.a. “nickel test”). Samples taken by RGP staff in 1997 returned the following assays: Sample 97-BGG-01: 21200 ppm Cu, 1465 ppm Ni, 45 ppm Zn, 5 ppb Pt, 14 ppb Pd, 8 ppb Au, 580 ppm Cu, 90 ppm Cr, and 0.07% Ti; Sample 97-BGG-02: 19350 ppm Cu, 600 ppm Ni, 70 ppm Zn, <10 ppb Pt, 4 ppb Pd, <4 ppb Au, 1170 ppm Co, 60 ppm Cr, and 0.09% Ti (Schnieders et al, 1998). Sampling of quartzo-feldspathic hornblendite assayed 2.12% copper, 1465 ppm nickel, 45 ppm zinc, 14 ppb palladium, 5 ppb platinum, 8 ppb gold and 580 ppm cobalt. A sample of a quartzo-feldspathic zone in gabbro assayed 1.94% copper, 600 ppm nickel, 70 ppm zinc, and 1170 ppm cobalt (Schnieders et al. 1998). New stripping exposed quartz veins (UTM Zone 16, 601599E, 5441791N NAD 27) varying from 25 cm to 1 m wide and striking 352°. The vein is hosted by diorite, hornblendite, quartzo-feldspathic pods and pegmatite, gabbro and bladed gneiss, and contains chalcopyrite-rich sections of up to 7.5 cm wide. A grab sample (04-BPR-01) of the chalcopyrite-rich quartz vein assayed 9.91% copper, 372 ppm nickel, 417 ppm zinc, 2 g/t palladium, nil platinum, 13 ppb gold and 16 ppm silver. A second grab sample (04-BPR-02) taken 15 m along strike of a chalcopyrite-rich section, assayed 5.51% copper, 182 ppm nickel, 336 ppm zinc, and no appreciable platinum, palladium or gold. A narrow, 0.5 cm wide quartz vein (UTM Zone 16, 601716E, 5441789N, NAD 27) was also observed striking 130°. The vein is hosted in mafic schist, likely an altered and metamorphosed metavolcanic rock. Schistosity was measured striking 210°. A grab sample (04-BPR03) assayed 3.6% lead, >5000 ppm zinc, 144 ppm copper, 33 ppm nickel, and 36 ppm silver (Schnieders et al., 1998). DDH TR99-1, drilled 770 m south of the showing and 950 m west of Rawluk Lake, found disseminated to stringer sulphides with 0.11% Cu over 0.75 m and 0.17% Cu over 0.71 m (Assessment report 42F04SE2002). Sample 00-BGG-10 returned 36,200 ppm Zn from an amphibolitized mafic volcanic with veinlets of pyrite, pyrrhotite, and chalcopyrite (Assessment report 42F04SE2003). Samples collected during the 2013 prospecting program returned >10000 ppm Cu, 1350 ppm Ni, and 2030 ppm Co (Assessment report 20000008182).

Alteration Comments

Dec 07, 2005 (D McKay) - Williams amd Breaks (1989, p.89-90) state that the most extensive alteration outside the Manitouwadge synform occurs in the Faries Lake complex. A 50 m wide chlorite-muscovite-garnet-anthophyllite zone, having a strike length of at least 450 m, is situated on a Geco Mines Ltd. claim block approximately 1 km west of Rawluk Lake. This zone broadly overprints a contact between anorthositic rocks and mafic metavolcanics. The zone developed during two stages. The first alteration stage formed a syn-deformational chlorite-muscovite assemblage in a folded, anastomosing veinlet system contained in a highly altered anorthosite host. Fold axes and a weakly developed mineral lineation on vein surfaces concordant with D2 linear elements present in the immediate surroundings. A second alteration stage produced anthophyllite-bearing assemblages consisting of randomly oriented, coarse-grained, nearly monomineralic aggregates of anthophyllite and minor plagioclase; these cut the chlorite-bearing assemblage. Anthophyllite-bearing alteration assemblages developed during a static, annealing metamorphism and apparently occurred preferentially in mafic metavolcanics, where coexistence of anthophyllite with medium- to coarse-grained red garnet is common. Towards the margin of the alteration zone, veins and ovoid patches contain anthophyllite-garnet-hornblende-plagioclase in a mafic metavolcanic host. Disseminated pyrite occurs locally within the altered mafic metavolcanics. Although the alteration and sulphide-mineralized zone at the Rawluk Lake sulphide occurrence are situated along the contact between anorthositic and mafic metavolcanic rocks, the possibility of a volcanogenic origin to the mineralization should not be dismissed.

Mineral Record Details

Classification
Rank	Classification
1	Hydrothermal

Characteristics
Rank	Characteristic
1	Disseminated

References

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Geology of the Manitouwadge-Hornepayne area

Publication Number: OFM0142 Scale: 1:50,000 Date: 1990

Author: Williams H.R., Breaks F.W.