Ontario Geological Survey
Permanent Link to this Record:
MDI41O10NE00071
| Record Name(s) | Asarco DDH F92-3 - 1999, Asarco - 1992 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1999-Dec-15 |
| Date Last Modified | 2022-Sep-23 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Garnet
Latitude: 47° 40' 19.49" Longitude: -82° 30' 36.63"
UTM Zone: 17 Easting: 386637 Northing: 5280959 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 41O10NE
Point Location Description: Drill hole collar for Asarco ddh F92-3.
Location Method: Field Visit with GPS
Access Description: The showing is accessible by the Dore Road, which comes within about 1 km of the showing in southern Garnet Township. The Dore Road runs through the eastern portion of Garnet Tp. and is readily accessible from the main logging road that runs between the town of Sultan and Highway 101.
1971: Dome Exploration - 1 ddh in vicinity of showing (T-2081). 1983: Lacana Mining Corp. - mapping, 2 ddh (T-2561). 1987-90: Mingold Resources - ground magnetics and VLF-EM survey(T-3248/2.11838), geochemical survey(T-3248/2.11837), bulk overburden sampling, 4 ddh (624.8 m) (T-3248). 1991-92: Asarco - geological mapping, magnetic survey, HLEM survey, 4 ddh (630.5 m), down-hole pulse EM, deep EM survey(T-3490 / 2.14651).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3248 / 2.11837 | 41O09NW0079 | 41O09NW0079 |
| T-3248 / 2.11838 | 41O09NW0080 | 41O09NW0080 |
| T-3490 / 2.14651 | 41O09NW0075 | 41O09NW0075 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Tectonic Assemblage: Garnet-Tooms
Geological Age: Neoarchean Geochronological Age: 2729 MA Geochron. Age Ref.: GOO VOL 1
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
| Rock Type | Rank | Composition | Texture | Relationship | Sulphide Ironstone | 1 | Sulphide-Facies | Banded Iron Formation | Host |
|---|---|---|---|---|
| Magnetite Ironstone | 2 | Magnetite-Facies | Banded Iron Formation | Host |
| Mafic Tuff | 3 | Tuff | Adjacent | |
| Mafic massive flow | 4 | Massive | Adjacent |
Dec 07, 2005 (A Wilson) - Highly anomalous gold values associated with a 1.3 m section of sulphide-facies iron formation. The iron formaiton is described as being a very siliceous unit lacking distinct banding. sulphides up to 15% occur as wispy mm to cm scale bands. Twenty percent yellow sericite is reported as varrying from millimeter size spots to anastomosing millimeter scale veinlets forming diffuse bands at a 45 degree angle to the core axis. The sulphide-facies iron formation is bounded to the south by an oxide-facies iron formation described as having centimeter scale altenating chert-magnetite bands, with minor chloritic argillite beds. To the north, the sulphide iron formation is bounded by chlorite and sericite altered mafic tuffs.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 1 | Pyrrhotite | Economic | Gangue | ||||
| Sericite | Alteration | Sericitization | 1 | Medium | Replacement |
Dec 07, 2005 (A Wilson) - Mineralization within the 1.3 m sulphide iron formation unit consists of 15% pyrrhotite with trace chalcopyrite occurring as fine millimeter to centimeter scale wispy bands. The oxide-facies iron formation in contact with this unit is described as containing about 30% magnetite with 1% pyrrhotite. Hole F92-3 returned a 2.5 m section with 2.61 g/t Au and a 3 m section with 1.15 g/t Au. A grab sample taken from a stripped area by the OGS in 1994 returned an assay of 0.01 g/t Au and 0.1 g/t Ag.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown |
Date: Dec 15, 1999
Geologist: A Wilson
Notes: Visit by K. Houle 28/06/94 (PRECIS): An area of stripping and trenching was observed to the north of the drill holes and was mostl likely an attempt to expose the subsurface anomaly. The stripped area showed mostly massive and pillowed mafic metavolcanics with a 3 m surface exposure of felsic intrusive. Evidence of channel sampling was noted in areas subparallel to quartz veinlets. Evidence of a surface exposure of iron formation was not observed at this location.
File - Resident Geologist files T-2081, T-2561
Publication Number: Date:
Author:
Publisher Name:
Location: Timmins RGP office
Map - Cunningham and Garnet townships, Sudbury District
Publication Number: M2503 Scale: 1:31,680 Date: 1987
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)
Publication Number: OFR5912 Page: 111-112 Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Garnet Township, District of Sudbury
Publication Number: P2340 Scale: 1:15,840 Date: 1980
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Garnet Lake area, District of Sudbury
Publication Number: R248 Date: 1987
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
Map - Geology, Swayze greenstone belt, Sultan, Ontario
Publication Number: OF 3384E Scale: 1:50,000 Date: 1999
Author: Heather, K B; Shore, G T
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/210453
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