Ontario Geological Survey
Permanent Link to this Record:
MDI52B09NW00038
| Record Name(s) | Vanguard West - 1923, F.E. Anderson - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1991-Mar-22 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc
Secondary Commodities: Silver, Gold
Township or Area: Kashabowie Lake Area
Latitude: 48° 38' 35.1" Longitude: -90° 27' 1.01"
UTM Zone: 15 Easting: 687814 Northing: 5390918 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B09NW
Point Location Description: From AFRI 52B09NW2009
Location Method: Conversion from MDI
1923: Discovery of the Vanguard prospect. 1943: Alderman Copper Corp. conducted trenching, and an SP and magnetometer survey. 1946: Andowan Mines Ltd. drilled 33 DDH totalling approximately 3000 m. 1949: Northpick Gold Mines conducted diamond drilling and a geophysical survey. 1956: Bandowan Mines Ltd. drilled 39 DDH totalling 7529 m. 1966: Tinex Development & Exploration conducted geological mapping, diamond drilling and an EM survey. 1984: Noranda conducted regional airborne magnetic and EM geophysical surveys. 1992: Noranda drilled 3 DDH totalling 1006 m and conducted a ground geophysics survey. 2003-6: Canadian Golden Dragon Resources Ltd. drilled 21 DDH totalling 2077 m and conducted IP and airborne VTEM and magnetometer surveys. 2009: Trillium North Minerals conducted geological mapping and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.25700 | 52B09NW2018 | 52B09NW2018 |
| 2.11382 | 52B09NW0002 | 52B09NW0002 |
| 2.6265 | 52B09NW8103 | 52B09NW8103 |
| 24 | 52B09NW0006 | 52B09NW0006 |
| 25 | 52B09NW8102 | 52B09NW8102 |
| 2.26861 | 52B09NW2021 | 52B09NW2021 |
| 2.18816 | 52B09NW2007 | 52B09NW2007 |
| 2.33643 | 20000001836 | 20000001836 |
| 2.30498 | 20000000623 | 20000000623 |
| 2.18211 | 52B09NW2002 | 52B09NW2002 |
| 2.19934 | 52B09NW2009 | 52B09NW2009 |
| 2.38072 | 20000003401 | 20000003401 |
| 2.29307 | 20000000666 | 20000000666 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Shebandowan
Geological Age: Archean
May 19, 2016 (Therese Pettigrew) - The most prominent geological feature on the Vanguard Property is a large, 5 km by 2 km, rhyolite dome complex, situated in the western portion of the property. This complex trends WSW to ENE, is an antiform, and probably plunges doubly to the ENE and WSW. The rhyolite dome complex is dominated, especially to the west, by massive fine grained rhyolite flows and quartz-sericite schists. Rhyolite breccias and lapili tuffs predominate at the periphery and in the eastern areas of the complex. Components within this rhyolite complex are several small basins with graphitic sediments encountered in drill holes (Cominco 1970, Heggie 2005). At the western boundary of the property the rhyolite complex is cored by felsic to mafic intrusive rocks. The rhyolite dome/antiform is flanked both to the NW and SE mainly by intermediate volcanic rocks, and by lesser amounts of felsic fragmental volcanic rocks, and is capped by mafic pillowed flows. Basic pillow lava flows clearly cap the rhyolite complex. To the northeast the dome evolves into a complex of interfingering mafic to felsic fragmental volcanic rocks; and a smaller felsic dome occurs in the Mud Lake area 2km east of Figure 3. A small, but economically important, component of volcanic strata along the southern flank is the exhalite horizon (chert, tuffite) that hosts VMS-style mineralization at Vanguard East and West. This horizon has been traced by drilling and trenching over a distance of 2 km to the southwest of Vanguard West. (AFRI 20000003401).
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Intermediate lava flow-unsubdivided | 2 | Adjacent | ||
| Mafic Tuff | 3 | Exhalite Chert And Tuffite | Host | |
| Schist-Unsubdivided | 4 | Quartz-Carbonate-Sericite | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Sphalerite | Economic | Ore | ||||
| 4 | Magnetite | Economic | Ore | ||||
| Carbonate | Alteration | Carbonatization | 1 | Unknown | Disseminated | ||
| Chlorite | Alteration | Chloritic | 2 | Unknown | Disseminated | ||
| Silica | Alteration | Silicification | 3 | Unknown | Disseminated |
May 19, 2016 (Therese Pettigrew) - At Vanguard, the mineralization is hosted in a near vertical silica-carbonate horizon enveloped in altered mafic and intermediate metavolcanic rocks. At Vanguard West, rocks are exposed over an area of 130 by 30 metres in a WSW direction. From north to south the exposure is composed of approximately 10 metres of chlorite-quartz-sericite-carbonate schist followed by a 3 to 15 metre wide chert-silicified horizon with lenses, pods and disseminations of pyrite, chalcopyrite and sphalerite. Magnetite is often found with chalcopyrite. Massive sulphide bodies are small and discontinuous. South of the chert is up to 5 metres of tuff and breccias of mixed intermediate and mafic metavolcanic rocks followed by up to 20 metres of mafic metavolcanic chlorite-carbonate-sericite-schists with bands of hyaloclastite and locally varioles, amygdules and disseminated pyrite. Vanguard East and West are 900 meters apart. The intervening area is occupied by postmineralization intrusions of anorthosite and gabbro, and by splays of the Crayfish Creek Fault. (AFRI 20000007391). West Vanguard is exposed in trenches for a length of 1300 feet. 23 DDH drilled in 1956 indicated a vertical depth of 600 feet, 22 feet width, and an average grade of 1.25% Cu. Zinc, gold and silver were also found to be present but in relatively small amounts (Thomson et al, 1957).
May 19, 2016 (Therese Pettigrew) - At both Vanguard East and West, intense alteration is developed on both sides of the chert horizon. The alteration minerals in order of abundance are: Fe/Mg carbonate, chlorite, silica in silicified and chloritized mafic metavolcanics and quartz+carbonate±sericite schist. Pyrite is disseminated in both footwalls and hanging walls. Systematic whole rock analysis of Noranda diamond drill core showed that broad zones of alteration at Vanguard East and West are depleted in sodium and calcium and enriched in silica, iron, magnesium, copper, zinc, silver and gold. Such depletion/enrichment patterns are widespread in VMS systems and associated principally with wall rock alteration around hydrothermal vents (AFRI 20000007391).
| Rank | Classification |
|---|---|
| 1 | VMS Base Metal |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| West Vanguard | 1957 | Unclassified | 181436 | Thomson et al, 1957, p. 45-46; Allegheny Mines Corp. press release Nov 4, 1997 | 200,000 tons at 1.25% Cu, 1% to 2% Zn, 0.28 opT Ag | Copper 1.25 Percent, Silver 0.28 Ounce per Ton, Zinc 1.5 Percent |
MonoMap - Geology of the Kashabowie area, District of Thunder Bay
Publication Number: R053 Page: 22-23 Date: 1968
Author: Hodgkinson J.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geology of the Vanguard West Prospect, Kashabowie Area, Northwestern Ontario
Publication Number: P3358 Date: 1996
Author: Farrow C.E.G.
Publisher Name: Ontario Geological Survey
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 313 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Property visits and reports of the Atikokan economic geologist, 1979-1983, Atikokan geological survey
Publication Number: OFR5539 Page: 493-494 Date: 1985
Author: Schnieders B.R., Dutka R.J.
Publisher Name: Ontario Geological Survey
Location:
Mono - Copper, nickel, lead and zinc deposits in Ontario (revised to February, 1957)
Publication Number: MDC002 Page: 45 Date: 1957
Author: Thomson J.E., Ferguson S.A., Johnston W.G.Q., Pye E.G., Savage W.S., Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Kashabowie sheet, Thunder Bay District
Publication Number: M2128 Scale: 1:31,680 Date: 1968
Author: Hodgkinson J.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geology and Mineral Potential of the Upper and Middle Shebandowan Lakes Area, District of Thunder Bay
Publication Number: P3312-REV Scale: 1:20,000 Date: 1996
Author: Osmani I.A.
Publisher Name: Ontario Geological Survey
Location:
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