Ontario Geological Survey
Permanent Link to this Record:
MDI42B01SW00013
| Record Name(s) | Lefever-Silams - 1983, Lefever-Desourdy-Silams - 1983, Lefever-Silams-Desourdy - 1935, Inlet - 1959, Toute La Gang - 1992 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1992-Jun-30 |
| Date Last Modified | 2022-Nov-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Silver
Secondary Commodities: Copper
Township or Area: Horwood
Latitude: 48° 1' 29.28" Longitude: -82° 18' 42.26"
UTM Zone: 17 Easting: 402197.929 Northing: 5319889.113 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42B01SW
Point Location Description: Recently stripped outcrop at north end of the showing and part of the original showing.
Location Method: Field Visit with GPS
Access Description: The showing is 87km west southwest of Timmins and access is possible via Highway 101 to the Groundhog Lake - Horwood Lake access road / Highway 616. From this point a gravel road extends south for 11km to a landing on Horwood Lake. A 9km boat trip from the landing is then required to reach the east shore within 200m of the trenches.
1935 P.H. Silams initially staked the ground. Between this date and 1959 a series of trenches and pits had been dug over a 400m long area but no records of this work exist. In 1936 five holes were cored at the north end of the showing an some auriferous zones were intersected. 1956 J. Lefever drilled a number of holes an intersected some quartz veining but no assays were reported. 1959 Kerr Addison carried out a magnetic survey which covered the area. 1980 Raise Contracting and Ingamar Exploration over the next two years carried out a magnetic and VLF geophysical survey combined with a limited stripping and mapping program. 1986 Pelangio Larder Mines Ltd carried out an exploration program over the next three years which consisted of Magnetic, VLF-EM, and IP geophysical surveys, overburden stripping, and a geological mapping program. This work found that the showing consists of numerous small discontinuous quartz veins. Local massive sulphide pods in these veins returned values up to 25 g/tonne gold 4.5 g/tonne silver and 0.3% Cu. but typically low values were reported. 1989 The Ontario Geological Survey mapped a small outcrop west of the northern trenches.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-2123, 12 | 42B01SW8531 | 42B01SW8531 |
| T-2712, 2.10441 | 42B01SE0045 | 42B01SE0045 |
| T-2737, 2.5107 | 42B01SE0054 | 42B01SE0054 |
| T-1976, 2.9685 | 42B01SE0047 | 42B01SE0047 |
| 2.11166, T-2712 | 42B01SE0042 | 42B01SE0042 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Geological Age: Neoarchean Geochronological Age: 2700 MA Geochron. Age Ref.: GOO VOL1
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Vein | Host |
|---|---|---|---|---|
| Diorite | 2 | Diorite | Host | |
| Mafic lava flow-unsubdivided | 3 | Basalt | Tholeiitic Fe | N/A |
| Porphyry-unsubdivided | 4 | N/A | ||
| Diabase | 5 | Diabase | Near | |
| Mylonite/Fault Gouge/Pseudotachylite | 6 | Shear Zone | Contains | |
| Vein | 7 | Quartz-Carbonate | Contains | |
| Porphyry-unsubdivided | 8 | Near |
Dec 07, 2005 (S Fumerton) - The surrounding rocks consist of a northwesterly trending sequence of Fe tholeiitic metavolcanics. In the immediate area of the showing the sequence is dominated by medium to coarse grained massive flows though there are intercalated horizons of fine grained flows, pillowed flows, and various tuffaceous rocks. To the west of the northern part of the showing there is a body of fine to medium grained intermediate to felsic material. This has been interpreted as both a felsic intrusive and as a small pile of felsic metavolcanics intercalated with chert. East of these rocks there are a number of en-echelon felsic sills. Also at the northern end of the showing there is a network of hairline fractures that have been infilled with silica, carbonates, and chlorite. The trend of these fractures is parallel to the vein. At the south end there is a light and pervasive though erratic pink alteration tint to the coarse mafic flows which may be potassic. All rocks have been cut by a number of diabase dykes trending north south some of which occupy fractures in the rock < 5cm thick.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Pyrrhotite | Economic | Gangue | ||||
| Chlorite | Alteration | Chloritic | 1 | Weak | Network |
Dec 07, 2005 (S Fumerton) - The mineralization occurs in a number of thin discontinuous quartz veins over a 600 x 200m area. At the north end of the showing these veins trend northwest parallel to the local lithology and the veins are typically situated on various lithological contacts, e.g. porphyry sills - diabase, rhyolite - chert. The veins are 10 to 20cms thick, banded and with parting planes, and irregular diffuse trails of fine sulphides. Trace amounts of disseminated pyrite occur in the porphyry sills. At the south end of the showing the veins are hosted entirely in mafic metavolcanics and trend north south. The largest vein is very coarse grained and varies between 30 and 100cm wide. Within this vein there is an erratic distribution of coarse chalcopyrite and pyrite. Immediately adjacent to the veins chlorite alteration is common.
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Gold | Unknown | .1 | ppm | |||
| Gold | Unknown | 15.83 | ppm | |||
| Gold | Unknown | .17 | ppm | |||
| Gold | Unknown | 1.13 | ppm | |||
| Gold | Unknown | 17.31 | ppm | |||
| Silver | Unknown | 4.8 | ppm | |||
| Silver | Unknown | 3.43 | ppm | |||
| Silver | Unknown | .35 | ppm | |||
| Silver | Unknown | ppm | BDL | |||
| Silver | Unknown | .35 | ppm |
| Rank | Classification |
|---|---|
| 5 | Mesothermal |
| Rank | Characteristic |
|---|---|
| 5 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 100 | 315 | 90 | N/A | N/A |
Date: Jun 30, 1992
Geologist: S Fumerton
Notes: There are numerous trenches and pits in the area most of which have been completely filled in and overgrown with moss. The southernmost and largest pit has been cleaned out at different times and additional blasting has taken place. This pit fixed with the GPS. The northern pits and trenches have been stripped more recently.
Map - Horwood Lake, Sudbury District
Publication Number: M2329 Scale: 1:31,680 Date: 1975
Author: Breaks F.W.
Publisher Name: Ontario Division of Mines
Location:
Publication - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario
Publication Number: GSC OF 1087 Date: 1985
Author: Rose, D.G.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129999
Part - Geology of the Horwood Lake area
Publication Number: ARV46-02 Page: 27 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
File - Resident Geologist files 1946, air photo
Publication Number: Date: 1996
Author:
Publisher Name:
Location:
MonoMap - Geology of the Chapleau area, districts of Algoma, Sudbury, and Cochrane
Publication Number: R157 Date: 1977
Author: Thurston P.C., Siragusa G.M., Sage R.P.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of the Horwood Lake Area, Sudbury District
Publication Number: R169 Date: 1978
Author: Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold deposits of Ontario, part 2, part of District of Cochrane, districts of Muskoka, Nipissing, Parry Sound, Sudbury, Timiskaming, and counties of southern Ontario
Publication Number: MDC018 Page: 104 Date: 1979
Author: Gordon J.B., Lovell H.L., de Grijs J.W., Davie R.F.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geological and geochemical setting of 3 gold occurrences in the Horwood Lake area, central Swayze belt
Publication Number: OFR5803 Date: 1991
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
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: 603-605 Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Location:
Book - Horwood Township - unpublished GDIF
Publication Number: GDIF Date: 1990
Author: Resident Geologist Staff
Publisher Name:
Location: Timmins RGP
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