Ontario Geological Survey
Permanent Link to this Record:
MDI000000000492
| Record Name(s) | Dome DDH 188-9 - 1984 |
|---|---|
| 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: Nango Lake Area
Latitude: 52° 25' 37.86" Longitude: -91° 24' 15.29"
UTM Zone: 15 Easting: 608500.003 Northing: 5809750.005 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B06NW
Point Location Description: Assessment file map.
Location Method: Data Compilation
1983-86: Geophysical surveys and diamond drilling by Dome Exploration Canada.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| W8403.00036 | 53B06NW0005 | 53B06NW0005 |
| 53B06NW0013 | 53B06NW0003 | 53B06NW0003 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent |
| 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) - This occurrence is based on anomalous gold assays reported from Dome Exploration diamond drill hole number 188-9 (AFRI# 53B06NW0005). These drill holes were advanced to test a magnetic anomaly shown on Dome Exploration magnetometer survey map number 83-199, and a co-incident electromagnetic anomaly shown on map number 83-194 (Racic, 1983). This magnetic anomaly indicates the presence of a fold closure in iron formation at this location, where bedrock is overlain by a thick layer of overburden. The magnetic data shown on the Dome Exploration maps (Racic, 1983) indicate that the axial plane of the fold strikes approximately 300. Drill hole 188-9 was reported to have been drilled from north to south, oblique to the fold axial plane. An assay of 2.74 g/t Au was reported over 0.4 m from an intersection within a unit of cherty, high-magnetite iron formation. The gold mineralized section (at 54.23 to 54.63 m) was described (AFRI#53B06NW0005) as containing 60% siliceous material, 5% pyrrhotite and 3% arsenopyrite. A second anomalous assay of 0.68 g/t Au was obtained at a depth of 78 m from another iron formation horizon that was mineralized with 20% pyrite (with some probable pyrrhotite), 1% chalcopyrite and minor arsenopyrite.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
Book - Electromagnetic and magnetic survey for Dome Exploration (Canada) Limited on Project 188 A, Nango Lake Area, Ontario (to accompany maps 83-190 to 83-199)
Publication Number: AFRI53B06NW0003 Date:
Author: Racic, L. 1983.
Publisher Name:
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office