Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41O15SW00009

Record: MDI41O15SW00009

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Denyes

Latitude: 47° 46' 19.27"    Longitude: -82° 49' 30.2"

UTM Zone: 17    Easting: 363262.611   Northing: 5292574.582    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O15SW

Point Location Description: Stripped outcrop on L24E and north of picket 28+50S former claim P994545.

Location Method: Field Visit with GPS

Access Description: Though it is possible to access the prospect from a landing on the Ridout Lake - Kormack Road when the water levels are high. However, the canoe trip does require a number of short portages down the Sylvanite Creek. Easier access is possible via float plane to Sylvanite Lake, then take the old portage/trail upstream to Sylvanite Creek. This trail is crossed by a recent drill trail which leads to the prospect.

Exploration History

1988: Messrs Jack Patrie and Dan Patrie staked the area to cover a mineralized shear zone. Follow up work consisted of a ground VLF electromagnetic and magnetic survey combined with prospecting. Values up to 27 g/t gold (0.78 opt) were obtained from a set of old trenches. In the following year the area was covered by an airborne magnetic and VLF electromagnetic survey and the showings were re-evaluated. Values up to 18 g/t were obtained from the resampling. In 1990 a humus sampling program was carried out over the property. The anomalous samples in this survey were not located over any known showing and were all consecutive samples on a single grid line. During the same year a small stripping program was carried out on another nearby prospect. 1992: Hemlo Gold Mines and Noranda Exploration optioned the property and carried out an integrated exploration program which consisted of geological compilation, mapping, and induced polarization. This was followed by a drill program and the prospect was tested with one hole. In 1993 two additional holes were drilled to test the prospect. Some pyrite mineralization plus quartz veining in strongly altered rocks was noted but the best assay was 3.3 g/t and typical values were less than a gram/tonne.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Tectonic Assemblage: Halcrow-Swayze

Geological Age: Neoarchean   Geochronological Age: 2700 MA   Geochron. Age Ref.: GOO VOL 1

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (S Fumerton) - Shearing appears to be developed best in the conglomerate horizon.

Lithology

Lithology Comments

Dec 07, 2005 (S Fumerton) - The mineralization is hosted in quartz veins within a highly carbonatized sequence of intercalated basaltic and komatiitic flows. Locally in the sequence there is a horizon of polymictic conglomerates. The komatiitic and basaltic rocks are weakly foliated, and contain some elongated fragments in addition to rare pillows. Compositionally, these rocks range from komatiite through basaltic komatiite to Mg tholeiitic basalt. At the prospect the rocks are strongly carbonatized and sericitized, and have some fuchsite alteration. The intensity of alteration is variable and there are several zones where the alteration is intense.

Mineralization

Mineralization Comments

Dec 07, 2005 (S Fumerton) - Pyrite is commonly found sparsely disseminated in the variably altered basalts, komatiites and conglomerates. Typically concentration vary from trace to 1% but locally the concentration may be up to 3%. At the showing there are multiple ages of mineralization and only two sets appear to be mineralized with gold. The first mineralized quartz veins are part of a set which are highly attenuated and parallel to the schistosity (310/62N). These veins and the adjacent country rock contain numerous Z shaped en-echelon extension quartz veins of varying size. Which form an unmineralized set. These en-echelon veins have locally merged together during their formation. In addition there is a third set of veins within minor discordant faults. This third set of quartz veins trends 182 deg and the largest vein in this set which is exposed also contains some gold. Except for the extensional quartz veins in the second set, the other quartz vein sets tend to be banded, contain fuchsite and have very fine grained, dark grey trails which may be due to the presence of sulphides. Only in the first set of veins are local sulphide concentrations visible and contain pyrite, chalcopyrite, arsenopyrite and galena. In very restricted areas these sulphides form up to 30% of the veins.

Dec 07, 2005 (A Wilson) - Samples collected by Jack and Dan Patrie in 1988 returned values of up to 27 g/t Au. Drill hole SYL-92-1 (Hemlo G. M.) returned a best assay of 3.30 g/t Au over 1.34 m: SYL-93-5 intersected 1.43 g/t Au over 1.28 m and SYL-93-6 intersected 0.53 g/t Au over 2.9 m. Chip samples collected by the OGS in 1988 returned values of 0.06 g/t Au and 2.6 g/t Ag; 17.4 g/t Au and 0.54 g/t Ag; 1.4 g/t Au; 2.6 g/t Au.

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

Site Visit Information

Date: Sep 15, 1988

Geologist: J Ireland

Notes: The writer visited the Patrie property in southwest Denyes Township accompanied by Mr. Patrie. Access was via float plane to Lee Lake. The party overnighted at the former Collingwood Energy Corp. drill camp. A boat provided transportation to the Patrie property which is transected by Sylvanite Creek flowing out of Lee Lake to Sylvanite Lake. The property consists of 45 contiguous, unpatented claims. An additional 19 claims have been filed but not recorded. The writer was invited to visit the property and document two quartz vein occurrences reported to be carrying significant gold values. The trip also afforded the writer an opportunity to observe geology and structure in a relatively remote section of the Swayze area. The showing is situated on grid line L24E between 27+00 and 28+00S. A large number of very old trenches and moss covered, stripped areas surround the showings. The quartz veins are exposed in two large trenches that have been partially cleared by hand. At least two quartz veins, trending 140 to 150deg and dipping steeply northeast, were intermittently exposed within a 40 foot wide section of a much larger 130 - 150deg trending shear zone. The veins were exposed intermittently over a 90 ft strike. Host rocks in the vicinity of the trenches are highly foliated to sheared and pervasively carbonatized. Primary mineralogy and physical features are unrecognizable. Secondary mineralogy consists of quartz, green to buff carbonate, fuchsite, sericite and chlorite. Quartz is the only non-ubiquitous mineral, occurring as stringers, veinlets quartz veins up to 48' wide and as localized areas of silicification adjacent to the larger veins. Sulphide mineralization is sparse and confined to the larger, 150 deg trending quartz veins. Sulphides observed include pyrite, chalcopyrite, galena and arsenopyrite. Average sulphide content of the quartz veins is 1 - 3% with local concentrations up to 15 -20% over short sections. ( PRECIS )

References

File - Resident Geologist files 1980, air photos

Publication Number: Date: 1996

Author:

Publisher Name:

Location:

MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)

Publication Number: OFR5912 Page: 239-241  Date: 1995

Author: Fumerton S.L., Houle K.A.

Publisher Name: Ontario Geological Survey

Location:

Map - Geology, Swayze greenstone belt, Rollo Lake, Ontario

Publication Number: OF 3384b Scale: 1:50,000    Date: 1999

Author: Heather, K B; Shore, G T

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/210450

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For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office