Ontario Geological Survey
Permanent Link to this Record:
MDI42E04SE00005
| Record Name(s) | Burning Rock Occurrence - 1973, Thorsteinson/Cox Pb, Zn, Cu - 1973, Burnt Rock - 1973 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1997-Feb-26 |
| Date Last Modified | 2022-May-06 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc, Lead
Secondary Commodities: Silver
Township or Area: Gravel River Area
Latitude: 49° 1' 52.78" Longitude: -87° 43' 45.92"
UTM Zone: 16 Easting: 446681.928 Northing: 5431194.696 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E04SE
Point Location Description: Pit, diamond drill hole(s)?
Location Method: Other Literature
Access Description: The occurrences are located approximately 1.5 km northwest of Nagunagisic Lake, 40 km northwest of Schreiber. Access may be gained by aircraft, or by overland travel from the Gravel River, 4 km to the east.
1973: Two sulphide occurrences were discovered and test-pitted by N. Cox and D. Thorsteinson. 1990: The property was staked and prospected by R. Reukl and B. Michon. 1992: Prospecting and diamond drilling were carried out with assistance from an OPAP grant. Additional prospecting was conducted in the area. 1995: The occurrences are currently held by B. Michon and R. Reukl.
Province: Superior
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The more northerly, Burning Rock, occurrence was so named by Dave Thorsteinson because a sample of the sulphide rich vein material reportedly combusted and produced a blue flame when burned (B. Michon, Prospector, personal communication, 1990). The showing occurs approximately 500 m northeast of the Salamander Point occurrence in a ravine that extends northeast from the north shore of a small lake approximately 1.3 km northwest of the northern tip of Nagunagisic Lake. The exposed outcrop consists largely of galena rich, sulphide + quartz veins in a granitoid host, foliated at 015 degrees. The veins strike between 030 degrees and 040 degrees and dip at 65 degrees to the northwest. Subparallel veins and veinlets ranging up to 10 cm in width comprise a mineralized zone with an exposed width of 3.5 m. There has been some brecciation of the sulphides by quartz and related open space filling. The main control on the location of the mineralized veins in the area is apparently a set of northeast striking faults that are parallel to the large scale Gravel River fault/ deformation zone, 1 km to the northwest. Most of the faults in the area are manifested as deep, narrow ravines. The close spatial association of the mineralized veins with these faults suggests that there is a possibility of lateral continuity of the mineralized structures along strike, as well as there being parallel structures nearby.
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Gneissic | Host |
|---|---|---|---|---|
| Diatexite Migmatite | 2 | Metasedimentary | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Galena | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Malachite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated |
Dec 07, 2005 (B Nelson) - Fine grained, massive galena may comprise over 50% of a vein, followed by subordinate, blebby chalcopyrite (+ malachite) and pyrite and perhaps sulphosalts. Fine grained, disseminated pyrite occurs in the jointed host rock. Grab sampling of mineralized veins at the showing (B. Michon and R, Reukl) returned values ranging from 0.00% to 1.98% Cu, 0.00 to 3.50% Zn, 0.02 to 31.20% Pb, 0.00 to 0.56 oz/ton Ag. Gold values returned nil in 13 out of 14 samples. One sample returned 0.01 oz/ton Au. *Reukl (1993) reported that 1992 diamond drilling intersected 2.58% Zn, 0.33% Pb, 0.04% Cu and 0.14 ounce per ton Ag across 31 feet (9.45 m) in Hole #1 and 3.41% Zn, 0.55% Pb, 0.07% Cu and 0.20 ounce per ton Ag across 39 feet (11.89 m) in Hole #2. Prospecting to the southeast also returned anomalous lead values. NOTE: It is uncertain whether these drill results refer to the Burning Rock or the nearby Salamander Point occurrence.
Date: Feb 26, 1997
Geologist: B Nelson
Notes: Resident Geologist personnel visited the occurrence May 22, 1990.
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 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
Article - Schreiber-Hemlo Resident Geologist's District - 1990
Publication Number: MP152.007 Date: 1997
Author: Schnieders B.R., Smyk M.C., Hinz P.
Publisher Name: Ontario Geological Survey
Location:
Book - UNPUBLISHED LETTER
Publication Number: Letter Date: 1974
Author: Thorsteinson, D.
Publisher Name:
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