Ontario Geological Survey
Permanent Link to this Record:
MDI52K15NW00020
| Record Name(s) | Roxmark West - 1970, Roxmark 'B' - 1970, Queensland Occurrence - 1959, Gerry Lake North - 1970 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-May-31 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Silver, Zinc, Lead
Secondary Commodities: Copper
Township or Area: Fredart Lake Area
Latitude: 50° 58' 18.48" Longitude: -92° 59' 57.69"
UTM Zone: 15 Easting: 500045 Northing: 5646689.01 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52K15NW
Point Location Description: Location of Sample 23620 on map in Assessment report 20000005293
Location Method: Data Compilation
Access Description: Located near northeast side of Gerry Lake. Access approx. 45 km along South Bay Mine Rd. from Ear Falls, then by boat on Gerry Lake.
1959-60: Queensland Explorations Ltd. conducted ground EM, magnetometer, and SP surveys and drilled 5 DDH totalling 2233.7 m. 1969: Roxmark Mines Ltd. conducted a ground magnetometer survey. 1970: Roxmark drilled 2 DDH totalling 358.6 m. 1985-88: Noranda Exploration undertook Pulse-EM, HLEM and ground magnetometer surveys and mapping/lithogeochemistry looking for blind Cu-Zn mineralization. 1991: W. Desmeules prospected the area and took lithogeochemical samples. 1992: Noranda Exploration performed mapping and lithogeochemical/soil geochemical sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 11 | 52K15NW0038 | 52K15NW0038 |
| 13 | 52K15NW0036 | 52K15NW0036 |
| 63.2573 | 52K15NW0034 | 52K15NW0034 |
| 2.1287 | 52K15NW0033 | 52K15NW0033 |
| 52K15NE0216 | 20000005292 | 20000005292 |
| 63.2428 | 52N02SW8908 | 52N02SW8908 |
| 2.1337 | 52K15NW0032 | 52K15NW0032 |
| 2.1179 | 52K15NW0006 | 52K15NW0006 |
| 52K15NW0100 | 20000005293 | 20000005293 |
| 2.11985 | 52K15NW0202 | 52K15NW0202 |
| 2.14729 | 52K15NW8943 | 52K15NW8943 |
| 63.6215 | 52K15NW8944 | 52K15NW8944 |
Province: Superior
Subprovince: Uchi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Near | ||
| Felsic lava flow-unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Molybdenite | Economic | Ore | ||||
| 6 | Magnetite | Economic | Ore | ||||
| 1 | Epidote | Economic | Gangue | ||||
| 2 | Anthophyllite | Economic | Gangue |
Nov 07, 2014 (A Wilson) - Grades reportedly up to 14 oz/t Ag.
Aug 13, 2020 (Therese Pettigrew) - The occurrence consists of chert-magnetite iron formation up to 3 m wide which hosts disseminated pyrite, pyrrhotite, and minor chalcopyrite. Sulphides also occur in thin layers and laminations up to 2 cm in width. Queensland Explorations Ltd. reported minor amounts of sphalerite and molybdenite in the mineralized zones. The iron formation consists of rusty and brecciated, sugary, recrystallized chert, which alternates with thin layers of magnetite. The chert is variably sericitized and contains minor epidote. Sheared and fissile, sericitized tuffs and metasediments occur in the vicinity of the trenches and contain abundant biotite, anthophyllite, chlorite, and garnet. Some of the mafic flows near the trenches are intensely altered to massive, green, felted masses of anthophyllite. Intensely folded, crenulated, and altered mafic flows hosting very thinly layered and laminated chert-magnetite iron formation are exposed on the northeast shore of Gerry Lake. Shearing in the metavolcanics trends 065 and 080/85SE and folds plunge 45 degrees to the southwest. Abundant fibrous, green anthophyllite occurs throughout the mafic metavolcanic rocks. Diamond drilling conducted at the occurrence by Queensland Explorations Ltd. intersected narrow mineralized zones that assayed as high as 2.56 ounces Ag per ton, with trace amounts of Cu. Samples taken from the occurrence by Roxmark Mines Ltd. were reported to assay as high as 14 ounces Ag per ton (The Northern Miner, March 26, 1970). The best drill intersection reported by Roxmark was 0.23% Cu and 0.2 ounce Ag per ton across 4 feet in sheared, biotite-gamet schist. Grab samples taken by Noranda from siliceous, altered rocks in an old trench at the Queensland occurrence assayed 2.94% Zn, 1.08% Pb, 0.04% Cu, and 1.36 ounces Ag per ton. Anomalous Zn and Cu values were also reported by Noranda in the 2 alteration zones northeast of Gerry Lake. A grab sample taken by OGS staff member J.R. Parker from the iron formation in 1 of the trenches at the Queensland occurrence contained 260 ppb Au, 4 ppm Ag, 338 ppm Cu, and 325 ppm Zn. The sample consisted of magnetite, biotite, chert, and anthophyllite (Atkinson et al.,1991).
Article - Red Lake Resident Geologist's District - 1990
Publication Number: MP152.003 Page: 55-56 Date: 1997
Author: Atkinson B.T., Parker J.R., Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
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