Ontario Geological Survey
Permanent Link to this Record:
MDI42D14SE00011
| Record Name(s) | Margon Lake Float - 1983, Micham Exploration - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1985-Mar-01 |
| Date Last Modified | 2022-May-11 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Silver
Secondary Commodities: Gold
Township or Area: Syine
Latitude: 48° 52' 19.14" Longitude: -87° 1' 18.46"
UTM Zone: 16 Easting: 498401.8 Northing: 5413224.96 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D14SE
Point Location Description: Base of a talus slope.
Location Method: Conversion from MDI
Access Description: The Margon Lake Float occurrence is located in Syine township approximately 10 km northeast of Terrace Bay. The occurrence is located on the west shore of Margon Lake. Access is via helicopter or by foot to Margon Lake. The topography is rugged and the occurrence is located at the base of a talus slope on the west side and on the shoreline of Margon Lake, approximately 2.5 km north of highway 17.
1983: Float copper mineralization was discovered by Micham Exploration Ltd.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.6189 | 42D15NW0024 | 42D15NW0024 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The general geology as shown on Walker's map (2107) consists of massive and pillowed mafic metavolcanic rocks, as well as hornblende epidote schists. A chert sulphide facies iron formation is shown several hundred meters south of the float occurrence. The Margon Lake occurrence consists of angular float boulders with copper mineralization discovered at the bottom of a talus slope. The copper mineralization occurs within quartz veins and along what appears to be pillow selvages. Chalcopyrite and malachite stain were observed. The quartz veins observed in the float varied up to 5 cm in width. The float is considered to be close to the source.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic pillowed flow | 1 | Pillowed | Host |
|---|---|---|---|---|
| Schist-Unsubdivided | 2 | Hornblende-Epidote | Near | |
| Vein | 3 | Quartz | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated | ||
| Malachite | Alteration | Supergene | 2 | Unknown | Disseminated |
Dec 07, 2005 (B Nelson) - The copper mineralization occurs within quartz veins and along what appears to be pillow selvages. Chalcopyrite and malachite stain were observed. The quartz veins observed in the float varied up to 5 cm in width. The float is considered to be close to the source. Dadson (1983) reported a 70 foot long gossan zone located 800 feet east of Margon Lake on L100 W at 25+00N that assayed 592 ppb Au. Hinz (1984) noted mineralized quartz boulders and a mineralized quartz vein located 220 feet upstream from the boulders. Resident Geologist personnel obtained assay results of <0.01 oz/ton Au, <0.10 oz/ton Ag and 1980 ppm Cu from a mafic volcanic with malachite stain and cp, and <0.01 oz/ton Au, 0.12 oz/ton Ag and 7300 ppm Cu from a 5 cm wide quartz vein with malachite and cp.
May 29, 2018 (Therese Pettigrew) - The Margon Lake occurrence consists of angular float boulders with copper mineralization discovered at the bottom of a talus slope. The float is considered to be close to the source. A 21.3 m long gossan zone located 243.8 m east of Margon Lake on L100W at 25+00N assayed 592 ppb Au (Schnieders et al., 1996).
Date: Feb 17, 1997
Geologist: B Nelson
Notes: Resident Geologist personnel visited the property August 31, 1984.
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: 333-334 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Part - Sixth report of the Inspector of Mines
Publication Number: ARV05.009 Page: 266 Date: 1998
Author: Slaght A.
Publisher Name: Ontario Bureau of Mines
Location:
Book - RES. GEOL. MIN. DEP. FILES TB.
Publication Number: N/A Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Journal - George Cross Newsletter 83-11-07
Publication Number: G Cross News Page: 2, map Date: 1983
Author:
Publisher Name:
Location:
Map - Jackfish-Middleton area, Thunder Bay District
Publication Number: M2107 Date: 1967
Author: Walker J.W.R.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Jackfish-Middleton area, District of Thunder Bay
Publication Number: R050 Date: 1997
Author: Walker J.W.R.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office