Ontario Geological Survey
Permanent Link to this Record:
MDI52F10NE00010
| Record Name(s) | Butler Lake - 1986 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1986-Jul-24 |
| Date Last Modified | 2022-Jan-24 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper
Township or Area: Butler Lake Area
Latitude: 49° 41' 51.02" Longitude: -92° 40' 32.63"
UTM Zone: 15 Easting: 523384.884 Northing: 5505049.33 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F10NE
Point Location Description: Precise
Location Method: Conversion from MDI
Access Description: The Butler Lake Property is located on the northern shore of the western half of Butler Lake, south of Wabigoon Lake, approximately 13 km southeast of Dryden. The occurrence is accessible by boat, and is situated along the southern boundary of the Butler Lake Provincial Park Reserve, in an area that has not recently been explored for gold. (OFR5723, p.180)
1917: Two shafts sunk on quartz veins on the north shore of Butler Lake. 1985: Rediscovered by Stan and Sherridon Johnson. (OFR5723, p.181)
Province: Superior
Subprovince: Wabigoon
Geological Age: Precambrian
Mar 02, 2010 (J Bongfelt) - The geology in the vicinity of the occurrence consists of lenticular masses of felsic flows and heterolithic, lapilli-tuff and tuff-breccia, intercalated with intermediate to mafic flows and heterolithic tuff-breccia within the Lower Wabigoon Volcanics. (OFR5723, p.180)
Mar 02, 2010 (J Bongfelt) - Thomson (1917) briefly described the occurrence as: 'two small shafts, ...the first on a tangle of quartz stringers containing pyrite, ankerite, tourmaline, chalcopyrite and malachite, the second on a quartz vein 4 feet wide, containing the same vein material as at the first shaft. The country rock at the latter is felsite schist striking about northwest....' The author found the occurrence to consist of eight large test pits and several trenches trending in a general northwest direction. Two of the pits appear to be shallow shafts (10 m) with fairly large rock dumps beside them. The country rocks consist of fine- to medium-grained, chloritic, carbonatized, massive mafic flows and mafic to intermediate tuffs. The metavolcanics commonly contain 12 to 52 disseminated euhedral pyrite, are weakly to intensely foliated (320º), and are variably altered and bleached pale green-gray. The metavolcanics are intruded by single quartz-carbonate veins and stringers, stockworks of veins, and sinuous masses and clots of quartz-carbonate. The veins strike between 065º to 154º, commonly dip south and southwest, and are composed of milk white and sugary gray quartz hosting variable amounts of buff-brown to orange iron carbonate, calcite, very abundant massive black tourmaline, >1% to 2% disseminated euhedral pyrite, ? 3% irregular blebs of chalcopyrite, and ? 1% blebs of sphalerite. At one pit there is a wide breccia zone (6 m), where angular, altered, and pyretic fragments of wall rock are embedded in a quartz-carbonate-tourmaline matrix. The wall rocks in the trenches are intensely sheared, sericitized with fuchsite, altered by iron carbonate, and contain very abundant disseminated pyrite (up to 10%). (OFR5723, p.180)
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Chalcopyrite | Economic | Ore | ||||
| 10 | Pyrite | Economic | Ore | ||||
| 15 | Sphalerite | Economic | Ore | ||||
| 20 | Tourmaline | Economic | Ore |
Mar 02, 2010 (J Bongfelt) - Although the author did not observe visible gold at the occurrence, Mr. Stan Johnson panned some good gold tails from sulphide-rich samples. The best assays from grab samples randomly taken by the author from various quartz veins in the trenches and pits, were 100 ppb gold, 830 ppb gold, 2510 ppb gold, 4590 ppb gold, 8420 ppb gold, 0.31 ounce gold per ton and 1.6 ounces gold per ton, with a zinc assay of 2270 ppm, copper assays ranging from 415 ppm to 8760 ppm, and silver assays ranging from >2 ppm to 16 ppm. (OFR5723, p.180)
Part - Dryden gold area
Publication Number: ARV26.005 Scale: Date: 1998
Author: Thomson E.
Publisher Name: Ontario Bureau of Mines
Location:
Compend - Report of activities, 1985, Regional and Resident Geologists
Publication Number: MP128 Scale: Date: 1986
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geology, gold mineralization and property visits in the area investigated by the Dryden-Ignace economic geologist, 1984-1987
Publication Number: OFR5723 Scale: Date: 1989
Author: Parker J.R.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology of the Butler Lake-Dinorwic Lake Area
Publication Number: P3582 Scale: 1:20,000 Date: 2006
Author: Beakhouse G.P., Idziszek C.
Publisher Name: Ontario Geological Survey
Location:
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