Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000000154| Deposit Name(s) | S04-08 - 2004 |
|---|---|
| Related Deposit ID | MDI000000000155, MDI52P16SW00011 |
| Deposit Status | occurrence |
| Date Created | 2006-Oct-06 |
| Date Last Modified | 2019-Sep-27 |
| Created By | M A Puumala |
| Revised By | T Pettigrew |
Primary Commodities: gold
Township or Area: Keezhik Lake Area
Latitude: 51° 45' 24.8" Longitude: -88° 27' 55.34"
UTM Zone: 16 Easting: 398860 Northing: 5735015 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P16SW
Point Location Description: Location from assessment file map.
Location Method: data compilation
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. 2008: Slam Exploration drilled 4 DDH totalling 656.8 m, including 2 DDH totalling 352 m on the occurrence.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.28485 | 52P16SW2001 | Open |
| 2.39113 | 20000003480 | Open |
Province: Superior
Subprovince: Uchi
Belt: Miminiska-fort Hope
Geological Age: Mesoarchean
Tectonic Assemblage: Unnamed Assemblage Equivalent To Pickle Crow.
| Structure Name | Scale | Strike | Dip | Trend | Plunge |
|---|---|---|---|---|---|
| Mineralized Shear Zone. | local | 0 |
10/06/2006 (M A 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 |
|---|---|---|---|---|
| porphyry | 1 | quartz-feldspar porphyry. | contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | gold | economic | ore | ||||
| chlorite | alteration | chloritic | 1 | unknown | disseminated |
10/06/2006 (M A Puumala) - McKay (2004) reported the discovery of this gold occurrence in Slam Exploration diamond drill hole S04-08. The occurrence is located in the Keezhik Lake quartz-feldspar porphyry stock that also hosts the KL-12 and KL-38 occurrences. This drill hole was advanced to test an inferred northerly-trending regional shear that is believed to host the KL-12 occurrence. The most significant mineralization in drill hole S04-08 was obtained from a chloritic shear in silicified quartz porphyry. Variably altered porphyry was reported over the entire length of the drill hole. The most favourable assay was 13.714 ppm over 0.5 m.
09/27/2019 (T Pettigrew) - DDH KL0815 assayed 1.0 g/t Au over 1.0 m. This zone is open to the east and west and is associated with a 500 m long humus anomaly (Assessment file 20000003480). Sample 10309 (located approximately 450 m NW of S04-08) returned 5.73 g/t Au and 2.5 ppm Ag from a fine-grained quartz-feldspar porphyry that contained thin, irregular quartz stockwork veins that measure less than 1 cm in thickness and show no visible mineralization (Assessment report 20000007917).
| Rank | Classification |
|---|---|
| 1 | lode (gold) |
| Rank | Characteristic |
|---|---|
| 1 | sheared |
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