Ontario Geological Survey
Permanent Link to this Record:
MDI42B01NW00068
| Record Name(s) | Ayer - 1991 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1999-May-06 |
| Date Last Modified | 2022-Jan-05 |
| Created By | A Wilson |
| Revised By | P Bousquet |
Primary Commodities: Zinc
Secondary Commodities: Copper
Township or Area: Ivanhoe
Latitude: 48° 9' 17.74" Longitude: -82° 27' 39.34"
UTM Zone: 17 Easting: 391349.39 Northing: 5334551.96 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42B01NW
Point Location Description: Cu ocurrence east of Midway creek map P.3199
Location Method: Field Visit with GPS
Access Description: Access is possible via a series of secondary forestry roads which branch off of the Ivanhoe Forest Acess Road approximately 3 km to the south.
There is no reported exploration in the area. The mineralization was reported by an OGS mapping crew in 1991. 1993: Dale Pyke - geological mapping, lithogeochemistry.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3636 / 2.15429 | 42B01NW0012 | 42B01NW0012 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Tectonic Assemblage: Muskego-Reeves
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The pillowed volcanics are locally strongly elongated at (250/75) which is oblique to the foliation (237/85). Superimposed upon the elongation and foliation is a strong silicification.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic pillowed flow | 1 | Tholeiitic | Variolitic, Pillowed | Near |
|---|---|---|---|---|
| Vein | 2 | Quartz-Carbonate | Stockwork | Host |
Dec 07, 2005 (A Wilson) - The volcanic sequenc consists of variolitic and locally amygadoidal pillowed flows. Some hyloclastites and pyroclastics are found intercalated with the pillows. Numerous quartz veins locally form a stockwork. In places these quartz veins are associated with hydraulic breccias. The area is pervasively altered to epidote.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore |
Dec 07, 2005 (A Wilson) - Semi-massive fine-grained pyrite occurs in small patches between individual pillows disseminated in a medium- to fine-grained hornblende matrix. Sulphide lenses are not common and typically less than 1 m by 0.1 m. In these sulphide lenses, joint surfaces are lined with rusty pyrite. Assays from samples collected by the OGS returned values of 1080 ppm Zn and 225 ppm Cu. Grab samples collected by D. Pyke in 1993 from the same vicinity returned Zn values of 1530 ppm and 2150 ppm.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 4 | .1 | 250 | 75 |
Map - Precambrian Geology, Ivanhoe Township, District of Sudbury
Publication Number: P3199 Scale: 1:15,840 Date: 1993
Author: Ayer J.A., Puumala M.A.
Publisher Name: Ontario Geological Survey
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 Scale: Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
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For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office