Ontario Geological Survey
Permanent Link to this Record:
MDI000000000497
| Record Name(s) | DDH Nk-88-10 - 1988 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2008-Mar-12 |
| Date Last Modified | 2022-Jun-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Neawagank Lake Area
Latitude: 52° 26' 34.36" Longitude: -89° 53' 55"
UTM Zone: 16 Easting: 303000 Northing: 5814250.001 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53A05NW
Point Location Description: Assessment file maps.
Location Method: Data Compilation
1987-89: Geological mapping and diamond drilling by Power Explorations and Santa Maria Resources. 1996: Geological mapping and prospecting by Placer Dome Canada.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.12764 | 53A05NW0004 | 53A05NW0004 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Domain: North Caribou Core
Belt: North Caribou
Geological Age: Mesoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent | ||
| Mafic 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 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Arsenopyrite | Economic | Ore |
Mar 12, 2008 (Mark Puumala) - Timoshenko and Corkery (1989) reported that this occurrence is located on the south limb of a major west-southwest-trending antiform structure. Diamond drilling results indicate that the rocks of the area are dominated by mafic to intermediate metavolcanics with minor clastic metasediments, oxide facies iron formation and feldspar porphyry. The major west-southwest-trending fold is reported by Timoshenko and Corkery (1989) to have a well-developed axial planar fabric (i.e., foliation) that is parallel to most shear zones and quartz veins that have been observed in the Neawagank Lake area. Diamond drill hole NK-88-10 intersected a 1.5 m section of interbedded clastic metasediments and oxide facies iron formation that assayed 0.055 oz/ton Au (Timoshenko and Corkery 1989). The anomalous gold assay was associated with a horizon containing 1 to 10% sulphide consisting mostly of pyrrhotite and pyrite, with minor arsenopyrite and chalcopyrite. Three additional drill holes (NK-88-14, 15 and 16) were drilled in a fan pattern to intersect the mineralized horizon above and along strike with the intersection in drill hole NK-88-10 (Timoshenko and Corkery 1989). A number of anomalous gold assays ranging from 0.01 to 0.046 oz/ton Au were reported from these drill holes.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office