Ontario Geological Survey
Permanent Link to this Record:
MDI42E12NW00010
| Record Name(s) | Candela - 1952, Freeport Sulphur - 1980 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1980-Mar-18 |
| Date Last Modified | 2022-Jun-20 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Sulphur/Pyrite
Township or Area: Summers
Latitude: 49° 38' 50.02" Longitude: -87° 59' 43.89"
UTM Zone: 16 Easting: 428133.52 Northing: 5499884.83 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E12NW, 52H09NE
Point Location Description: General location of Candela’s drill holes from Assessment report 42E12SW0108
Location Method: Conversion from MDI
1951: Macassa Mines Ltd. drilled 9 DDH totalling 3048 m. 1952-54: Candela Development Corp. carried out trenching and drilled at 8 DDH totalling 1066.8 m. 1987: Stratmin Inc. carried out mapping, sampling, and gradiometric and magnetometer surveys. 1988: Stratmin Inc. drilled 8 DDH totaling 1203.37 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.10845 | 42E12SW0061 | 42E12SW0061 |
| 13 | 42E12SW0108 | 42E12SW0108 |
| 28 | 42E12SW0063 | 42E12SW0063 |
Province: Superior
Subprovince: Wabigoon
Belt: Beardmore-Geraldton
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Silicate-Sulphide Facies | Host |
|---|
Nov 04, 2019 (Therese Pettigrew) - Sedimentary rocks within the claim group are confined to two linear silicate-sulphide facies iron formations. The northern iron formation was traced semi-continuously across the property through outcrop exposure, while the southern iron formation was only indicated in the eastern half of the claim group. The iron formations trend 70o and appear to dip vertically. The iron formation consists of various phases: (1) banded chert-magnetite hosting minor pyrite up to 3%; (2) chert hosting 1-5% pyrite; (3) chert-breccia consisting of chert and/or quartz nodules hosted within a siliceous tuffaceous matrix and commonly containing up to 30% coarse pyrite. Throughout the iron formation, pyrite occurs as fine-grained disseminations, colloidal aggregates, and coarse discontinuous clots. High concentrations of massive pyrite appear in horizontal and vertical seams, ranging in width from 5 to 30 cm, and large massive clots of similar size. Quartz veins occur throughout the iron formation in two principal directions; (1) horizontal seams or fracture filling veins, (2) north-south trending seams or fractures dipping vertically or at 45 degrees. No mineralization was observed with these veins (Assessment report 42E12SW0061).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Magnetite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Hematite | Economic | Ore |
Nov 04, 2019 (Therese Pettigrew) - Hewitt (1967) reports that the brecciated pyritous iron formation stikes ENE and dips 75 degrees N, with an average width of 24.4 m and length of 3900 m. On close examination of very thin quartz carbonate veinlets in sections of the chert breccia containing 30% pyrite, veins appear to be subsequent to pyrite accumulation, as many of the coarse aggregates of pyrite were cut and fractured by the veinlets. Horizontal fracture filling by quartz carbonate appeared to be a common characteristic of all rock types, as this structural control was noticed to pre-date schistosity in the mafic and intermediate flows. Available diamond drill logs from Candela’s 1952 drill program indicate a pyritic chert breccia zone(s) varying in width from 15 to 110 feet wide averaging 12-14% sulphur. Sporadic and random samples were assayed for gold with hole B-3 reporting 0.01 oz/t Au (0.34 g/t Au) over 2.8 feet (Assessment files 42E12SW0108 and 42E12SW0061).
Book - GDIF 42E12NW (unpublished)
Publication Number: GDIF Date: 1988
Author: Ontario Geological Survey
Publisher Name: Ontario Geological Survey
Location:
Map - Summers Township, District of Thunder Bay
Publication Number: P0602 Scale: 1:15,840 Date: 1998
Author: Mackasey W.O.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Pyrite deposits of Ontario
Publication Number: MDC005 Page: 51 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date: 1996
Author:
Publisher Name:
Location: Thunder Bay RGP
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 North Resident Geologist District Office