Ontario Geological Survey
Permanent Link to this Record:
MDI53B09SW00012
| Record Name(s) | Libert Lake Area 1 - 1987, Libert Lake LI-87-1 - 1987 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1995-May-23 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Zeemel Lake Area
Latitude: 52° 33' 6.21" Longitude: -90° 25' 53.26"
UTM Zone: 15 Easting: 674140.4 Northing: 5825505.28 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B09SW
Point Location Description: Transfer
Location Method: Conversion from MDI
1981-84: Opex Resources Inc. carried out geological mapping, magnetic and VLF-EM surveys, and soil geochemical sampling. 1987: Power Explorations Inc. and Van Horne Gold Exploration Inc. carried out prospecting, sampling, and drilled 17 DDH totalling 1923.3 m in the area.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.11220 | 53B09SW0004 | 53B09SW0004 |
| 27 | 53B09SW0005 | 53B09SW0005 |
| 53B09SW0034 | 53B09SW9416 | 53B09SW9416 |
| 53B09SW0041 | 53B09SW9425 | 53B09SW9425 |
| 53B09SW0029 | 53B09SW0017 | 53B09SW0017 |
| 53B09SW0024 | 53B09SW0024 | 53B09SW0024 |
| 53B09SW0020 | 53B09SW0029 | 53B09SW0029 |
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 |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent | ||
| Pegmatite | 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 | Magnetite | Economic | Ore | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated | ||
| Grunerite | Alteration | Amphibolitization | 2 | Unknown | Disseminated | ||
| Chlorite | Alteration | Chloritic | 3 | Unknown | Disseminated |
Sep 11, 2019 (Mark Puumala) - This occurrence is based on the results of Power Explorations and Van Horne Gold Exploration diamond drill hole LI-87-1 (Timoshenko 1988). This drill hole was advanced to test a north-striking iron formation horizon that is found near the centre of the mafic to ultramafic metavolcanic rock-dominated supracrustal sequence that occurs in this area. Timoshenko (1988) reported that a 0.9 m section of s-folded gruneritic iron formation that was encountered in this drill hole assayed 0.068 oz/ton Au (2.11 g/t Au). In addition to the iron formation and mafic metavolcanics, this diamond drill hole also encountered numerous narrow granitic intrusions. Drill hole L-87-9 (located at NAD83 UTM Zone 15 674000 m E 5825200 m N) returned an assay of 0.023 oz/ton Au (0.72 g/t Au) over 1.35 m from felsic intrusive rocks. The anomalous assay was obtained within 3 m of a 60 cm wide breccia zone containing 20 to 25% pyrrhotite (Assessment report 53B09SW0004).
Sep 11, 2019 (Therese Pettigrew) - Four fences were drilled on the property to test for possible gold mineralization in iron formation, (surface work on iron formation outcrops did not provide gold values higher than 194 ppb). The fences were located on L35+00N, 20+00N, 8+00N, and 16+00S. The three northernmost fences outlined two main bands of iron formation which run approximately down the centre of the metasedimentary-metavolcanic belt. Numerous smaller and likely discontinuous bands occur west of the main bands. The only significant value obtained from the iron formation was found in Hole LI-87-1. A 3 foot sample of S-folded, gruneritic iron formation assayed 0.068 oz/ton gold (2.11 g/t Au). Intersections of highly gruneritic and well mineralized iron formation and quartz veins within iron formation were encountered in several holes in Area 1. However, gold values were negligible. Other lithologies in Area 1 provided minor gold values. Hole LI-87-1 intersected a 3.0 foot interval of gneissic, weakly sericitic granite which yielded 0.01 oz/ton gold (0.31 g/t Au). Hole LI-87-3 intersected a 2.2 foot interval of mafic volcanics containing trace pyrite which assayed 0.013 oz/ton gold (0.40 g/t Au). Hole LI-87-9 intersected a 4.5 foot interval of felsic intrusives which yielded 0.023 oz/ton gold (0.72 g/t Au). This value may be related to a two-foot-wide zone of brecciation and heavy sulphide mineralization which occurs 10 feet below the intersection in the same intrusive unit. The brecciated zone did not return anomalous gold values (Assessment report 53B09SW0004).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
Mono - The geology of gold prospects in the North Caribou Lake greenstone belt, District of Kenora, northwestern Ontario
Publication Number: OFR5698 Scale: Date: 1989
Author: Piroshco D.W., Breaks F.W., Osmani I.A.
Publisher Name: Ontario Geological Survey
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 North Resident Geologist District Office