Ontario Geological Survey
Permanent Link to this Record:
MDI000000000155
| Record Name(s) | S04-09 - 2004 |
|---|---|
| Related Record Type | |
| Record Status | Occurrence |
| Date Created | 2006-Oct-10 |
| Date Last Modified | 2021-Dec-14 |
| Created By | Mark Puumala |
| Revised By | Therese Pettigrew |
Primary Commodities: Gold
Township or Area: Keezhik Lake Area
Latitude: 51° 45' 42.55" Longitude: -88° 27' 46"
UTM Zone: 16 Easting: 399050 Northing: 5735560 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P16SW
Point Location Description: Location obtained from assessment file 52P16SW2001
Location Method: Data Compilation
See Mason and White (1995) for pre-1995 exploration history of this area. 2004: An exploration program consisting of prospecting, geological mapping, diamond drilling and assaying was carried out by Slam Exploration on claims owned by William E. Brereton.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.28485 | 52P16SW2001 | 52P16SW2001 |
| 16 | 52P16SW9420 | 52P16SW9420 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Miminiska-Fort Hope
Geological Age: Mesoarchean
Oct 10, 2006 (Mark Puumala) - The Keezhik Lake area gold occurrences are located within the northern portions of the Miminiska-Fort Hope Greenstone Belt. This portion of the belt has been interpreted by Stott and Corfu (1991) to be underlain by the rocks of three separate supracrustal rock assemblages. The northernmost assemblage is dominated by mafic volcanic flows containing a banded iron formation marker unit. This assemblage is interpreted to be overlain by a southward facing sequence of massive to pillowed mafic volcanics that also contains a well-defined iron formation marker unit. A third assemblage consisting of mafic volcanics, felsic pyroclastic rocks and a quartz porphyry intrusion overlies the second unnamed assemblage. The Keezhik Lake gold occurrences are located near the boundary between the second and third assemblages. A wide variety of lithologies have been mapped in this area, including mafic metavolcanics, mafic to ultramafic intrusive rocks (gabbro and pyroxenite), banded iron formation, intermediate to felsic pyroclastic rocks with thin interbedded sedimentary layers, and quartz/quartz-feldspar porphyry intrusions (Arnold and MacTavish, 2005). Gold occurrences appear to be hosted within all of these lithologies, with the most significant known occurrence (KL-12) being found in a quartz porphyry stock. The Keezhik Lake gold occurrences are located in close proximity to the North Caribou Lake-Totogan Lake Shear Zone. This is a major regional-scale structure that may have provided a source of gold-mineralized fluids. Osmani and Stott (1988) identified this area as having significant gold potential, especially where splays or horse-tail shear zones may have transmitted fault movement into the greenstone belt. Lithological contacts with competent units such as porphyry intrusions and iron formations (i.e., the setting for many of the known occurrences) are considered to be favourable locations for the development of significant gold mineralized structures.
| Rock Type | Rank | Composition | Texture | Relationship | Quartz-Feldspar Porphyry | 1 | Quartz-Feldspar Porphyry | Contains |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| Sericite | Alteration | Sericitization | 1 | Unknown | Disseminated |
Oct 10, 2006 (Mark Puumala) - McKay (2004) reported gold mineralization in diamond drill hole S04-09, which was drilled to test an inferred northerly-trending regional shear that is believed to host the nearby KL-12 prospect. Drill hole S04-09 is located approximately 800 m south-southeast of KL-12. Variably-altered porphyry was reported over the entire length of this drill hole, with the most significant mineralization reported in sericitic intervals. The most favourable assay was 4.322 ppm Au over 1.0 m.
Sep 27, 2019 (Therese Pettigrew) - DDH CL-87-10, which is approximately 335 m to the east of DDH S04-09, assayed up to 0.484 ppm Au over 0.2 m. DDH CL-99-53, approximately 560 m to the east of S04-09, assayed up to 2.18 ppm Au over 1.5 m (Assessment report 52P16SW9420).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area
Publication Number: OFR5926 Scale: Date: 1995
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
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