Ontario Geological Survey
Permanent Link to this Record:
MDI42D14NW00013
| Record Name(s) | Acker Zinc - 1970, Bohm-Dunning - 1952, Windfall Group - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-27 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc
Secondary Commodities: Gold, Silver
Township or Area: Pays Plat Lake Area
Latitude: 48° 54' 29.29" Longitude: -87° 24' 34.27"
UTM Zone: 16 Easting: 469991.64 Northing: 5417324.51 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D14NW
Point Location Description: Trenches.
Location Method: Conversion from MDI
Access Description: The occurrence is located approximately 2.5 km north of the Lahontan Township--Killraine Township northern boundary approximately 15 km northwest of Schreiber and 6 km west of Lyne Lake (claim map G-606). The occurrence is accessible via the Zenmac Mine Road (Winston Lake Road) with an approximate 3 km walk west from the road. Access is also available by a foot trail from the north end of Sox Lake. Helicopter access is possible to a landing spot located 200 m north of the trenches.
1952: W.L.C. Greer examined the showing found by W.W. Bohm and A. Dunning for Steep Rock Iron Mines Ltd. 1970: W. Acker restaked the showing and recorded plugger work and trenching. 1970s Trenching and sampling of the occurrence was conducted by W. Acker of Schreiber. 1986: The property was optioned to Falconbridge Copper Corporation who conducted geological mapping, geophysical surveys, sampling and analyses. 2014: J. Ternowesky carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.56673 | 20000014566 | 20000014566 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The occurrence is classed as a 'lode gold/VMS' deposit. The general geology consists of predominately mafic metavolcanic xenoliths or roof pendants surrounded by granitic rocks. Major faults and lineaments trend to the northwest. *Greer (1952) described the property: The showing is in highly altered gneissic sediments (or lavas) and is only 150'(45m) from a large mass of granite to the south. Small patches of mineralization have been discovered over a length of 325'(99m) along the south side of an east west draw...One of the patches shows fair chalcopyrite mineralization across a width of perhaps 2 ft.(0.6 m). This is the point where the prospectors got the 0.60 oz. gold and 5% copper assay in a grab sample. The metavolcanics are biotite and amphibole rich, and display silicification and shearing. Exposures in old trenches indicate that the sulphide mineralization is hosted within east-west to northwest trending shear zones.
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Granite | Mafic Metavolcanic Xenoliths | Near |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Bio-Amphibole | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Sphalerite | Economic | Ore | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated |
May 17, 2019 (B Nelson) - Sulphides including chalcopyrite, sphalerite and pyrite were observed hosted by mafic metavolcanic rocks. The metavolcanics are biotite and amphibole rich, and display silicification and shearing. Exposures in old trenches indicate that the sulphide mineralization is hosted within east west to northwest trending shear zones. Hand samples display up to 25% sulphides, including chalcopyrite and fine grained sphalerite. Mineralization has been reported over a strike length of 300 m (W. Acker, Prospector, personal communication, 1985). Samples taken by Resident Geologist personnel returned values up to 0.05 oz/t Au, 0.27 oz/ton Ag, 1.04% Cu, and 1570 ppm Zn. Greer 1952) gives several assays including: Sample 1309: 0.06 oz/ton Au; 4.02 oz/ton Ag; 5.25% Cu; 0.72% Zn. Sample 774: 0.01 oz/ton Au; Trace Ag; 0.25% Cu; 3.80% Zn. Sample H3000: 0.01 oz/ton Au; 0.74 oz/ton Ag; 1.08%% Cu; 0.21% Zn.
Date: Feb 12, 1997
Geologist: B Nelson
Notes: Resident Geologist personnel visited the occurrence September 25, 1985.
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 201-203, 237-239 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
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