Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41O16SW00039

Record: MDI41O16SW00039

General

Mineral Record Identification
Record Name(s)	Ajax - 1961
Related Record Type	Simple
Related Record(s)
Record Status	Discretionary Occurrence
Date Created	1992-Aug-02
Date Last Modified	2023-Mar-02
Created By
Revised By

Commodities

Primary Commodities: Gold

Location

Township or Area: Horwood

Latitude: 47° 58' 52.41" Longitude: -82° 15' 16.33"

UTM Zone: 17 Easting: 406384.089 Northing: 5314974.911 UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O16SW

Point Location Description: Quartz vein on a ridge next to a swamp and on the granitic contact.

Location Method: Field Visit with GPS

Access Description: Easy access is possible by following the extension of the Kenogaming - Penhorwood Main Haul roads. About a kilometre before this road crosses a stream draining Great Pike Lake there is a road heading south built on the margins of the small swamp opposite the vein.

Exploration History

1961: Ajax Minerals mapped the area and sampled a number of quartz veins. It was during this period that anomalous gold values were reported from the vein. 1981: Kennco Exploration flew a VLF-EM and magnetic survey over the area. 1988: Hardiman Bay Resources remapped the area and resampled the vein.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
T-2469	42B01SE0055	42B01SE0055
T-2111	41O16NW0036	41O16NW0036
T-3228 / 2.11828	42A05NE0315	42A05NE0315

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

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

Metamorphism Type: Contact

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (S Fumerton) - The vein is orientated parallel to the foliation in the surrounding rocks which are draped around the Hardiman Bay Pluton.

Lithology

Lithology Data
Rock Type	Rank	Composition	Relationship
Vein	1	Vein	Host
Mafic lava flow-unsubdivided	2	Basalt	N/A
Sandstone	3	Arenite	N/A
Gneiss-Unsubdivided	4	Amphibolite	N/A

Lithology Comments

Dec 07, 2005 (S Fumerton) - On the large scale the vein is hosted in metavolcanic and metasedimentary rocks adjacent to, and the vein is parallel to, the Hardiman Bay Pluton. On a more detailed scale the metavolcanics have been metamorphosed to amphibolite gneisses and the metasediments form thin horizons of garnetiferous, pyritic meta-arenites plus other epiclastic rocks probably derived from volcanic rocks but whose origin is obscured by the metamorphism. These rocks have been intruded by a number of granitic dykes probably related to the major pluton. On the small scale the vein is located on the contact between one of the granitic dykes and amphibole gneisses.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking	Alteration Intensity	Alteration Style
1	Pyrite	Economic	Ore

Mineralization Comments

Dec 07, 2005 (S Fumerton) - The vein consists of clear very coarse quartz with some feldspar. Within the vein there is a ribbon texture with semi continuous chloritic seams. These seams and the margins of the vein have local rusty spots. Locally in the vein there are xenoliths of the adjacent metasedimentary and metavolcanic rocks, one of these pyritic, garnetiferous xenoliths has been repeatedly sampled as there is up to 10% sulphides.

Dec 07, 2005 (A Wilson) - Grab samples collected by the OGS returned trace values of gold.

Assay Samples

Assay Samples
Commodity	Analytical Method	Unit	Qualifier
Gold	Unknown	ppm	BDL
Gold	Unknown	ppm	BDL
Silver	Unknown	ppm	BDL
Silver	Unknown	ppm	BDL

Mineral Record Details

Classification
Rank	Classification
1	Mesothermal

Characteristics
Rank	Characteristic
1	Vein

Mineral Zones - Size and Shape

Rank: 1 Structure Type: Contact

Zone Name: Detour Lake - Rank 1
Shape	Length	Thickness	Depth	Strike	Dip	Plunge	Trend	Age	Reference
Tabular	50	3		250	80			N/A	N/A

References

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:

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:

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

Publication Number: OF3384c Scale: 1:50,000 Date: 1999

Author: Heather, K B; Shore, G T

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/210451

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: 289-287 Date: 1995

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

Publisher Name: Ontario Geological Survey

Location:

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