Ontario Geological Survey
Permanent Link to this Record:
MDI52F03SE00012
| Record Name(s) | Downie - 1970 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2003-Nov-18 |
| Date Last Modified | 2022-Jul-12 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Vista Lake Area
Latitude: 49° 2' 38.48" Longitude: -93° 1' 58.33"
UTM Zone: 15 Easting: 497597.998 Northing: 5432350.004 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F03SE
Point Location Description: Transfer
Location Method: Based on Assessment
Access Description: The Downie Occurrence lie 50 kilometres northeast of Fort Frances and access is from Hwy. 502 via The Cedar Narrows Access Road which runs west from 502 some 40 kilometres north of Hwy. No. 11. An old tote road runs north through the claims from the Cedar Narrows road about 2 kilometres west of Hwy. 502. (F. Downie, Assessment File F/3 SE I-1, p. 1, Kenora Resident Geologist Office)
1989: Rio Algom staked the property and carried out prospecting and sampling. 1991: E.S. Downie staked the claims and carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| OP91-290 /52F03SE I-1 | 52F03SE0019 | 52F03SE0019 |
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
Feb 25, 2010 (C Ravnaas) - The area is underlain by rocks of the Wabigoon Sub Province. These are composed of Archean volcanics, mainly basaltic flows with lesser intermediate flows and pyroclastics, felsic rocks are rare but there is a good, minor exposure in the west edge of Vista Lake. Gabbro sills (co'eval?) are prevalent and essentially duplicate the lithochemistry of the volcanics. The whole has been intruded late in the sequence by granitic, monzonitic and related intrusives. Of immediate concern (to the claims) is a broad band of folded mafic volcanics intruded by gabbros that runs from just south of Manitou Stretch down to Otukamamoan Lake. These are partially (?) pillowed: locally pillows can be identified through the dominant foliation and greenschist facies metamorphism. These have been intruded by a massive gabbro in the north (see Smith-Stephenson map) and just north of Cedar Narrows road and east of Twisted Lake. In addition are a number of secondary, but still substantial gabbro dykes/sills south (and west) of Vedette Lake and north of Cedar Narrows road. There is a notable Q. F. P. dyke that runs parallel or sub-parallel to stratigraphy from the Cedar Narrows Road 2 kilometres west of Hwy. 502 and trending north for at least 6 kilometres. This may not be continuous but is found consistently. On the property the volcanics are quite mafic and amphibolitized: the alteration is slightly beyond greenschist facies. Pillows are recognizable, but determining tops is not always possible. Facing is judged to be west. Strike variation is probably due to local rotation, and the general trend is north with local variation to the north-northwest. Foliation is pronounced and northerly to north-northeasterly and usually vertical to steeply dipping to the east. Gabbro is medium to coarse grained and tending to be mafic and usually quite fresh. Where altered amphibo1itisation makes the rock greener. Surprisingly the foliation is more pronounced in fresher gabbro. The third rock type of note forms a series of porphyry dykes, with one predominant. These have been traced off the property for about 6 kilometres north and west of the main gabbro mass which extends south through Graves lake to Vedette Lake ( just north-east of the property). This rock is creamy to buff weathering and creamy to pale grey where fresh. It varies from medium grained quartz-feldspar porphyry, to very coarse quartz-feldspar porphyry. The latter forms the main dyke with feldspar occasionally to 4 cm. X 2 cm. And quartz to 2 cm. square although 6 mm. to 1 cm. is more common. The latter is usually accompanied (adjacent to contacts) by carbonate veining (ferrodolomite) which is host to pyrite, minor magnetite and apparently some gold. the association of carbonate with porphyry is so common, and carbonate relatively rare away from the dykes that carbonate veining in volcanics or gabbro is probably indicative of the presence nearby of QFP - even in the absence of outcrop. At that time 14 chip samples were taken: the best returned just under 4g/T Au., not as good as H. Klatt's sampling. (F. Downie, Assessment File F/3 SE I-1, p. 1-3, Kenora Resident Geologist Office)
Feb 25, 2010 (C Ravnaas) - Grab samples returned up to 2307 and 3901 ppb Au are reported in assessment file 52F03SE I-1.
Map - Precambrian Geology, Vista Lake Area, East Part
Publication Number: M2566 Scale: 1:20,000 Date: 1993
Author: Smith P.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Precambrian Geology, Vista Lake Area
Publication Number: R282 Date: 1993
Author: Smith P.M.
Publisher Name: Ontario Geological Survey
Location:
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