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File Created: 27-Feb-95 by Robert (Bob) A. Lane(RAL)
Last Edit:  14-Dec-15 by Garry J. Payie(GJP)

Summary Help Help

NMI
Name LOON Mining Division Omineca
BCGS Map 093F061
Status Prospect NTS Map 093F12W
Latitude 53º 37' 39" N UTM 10 (NAD 83)
Longitude 125º 59' 10" W Northing 5946223
Easting 302545
Commodities Gold, Silver Deposit Types H05 : Epithermal Au-Ag: low sulphidation
Tectonic Belt Intermontane Terrane Overlap Assemblage
Capsule Geology

The Loon property is located about 70 kilometres south of Burns Lake in the Windfall Hills area, north and east of Uduk Lake near the eastern boundary of Tweedsmuir Park.

Felsic to intermediate flows and tuffs of the Eocene Ootsa Lake Group underlie most of the prospect area. Ootsa Lake rhyolitic rocks including welded and spherulitic flows and breccias, have a gentle westerly dip and are underlain by andesitic rocks of unknown age. Oligocene to Miocene Endako Group andesitic to basaltic flows, dikes and plugs locally overly or intrude Ootsa Lake Group rocks. Middle Jurassic Hazelton Group rocks, consisting of andesites and sedimentary rocks, are exposed to the southeast of the showing area and are intruded by quartz monzonite of suspected Cretaceous or Tertiary age.

In 1988, Mingold Resources discovered silicified and brecciated Ootsa Lake Group rhyolitic rocks which contained up to 1026 grams per tonne silver and 5.4 grams per tonne gold. In 1990, a small VLF-EM resistivity survey was completed and succeeded in outlining two distinct anomalous zones which coincided with the known areas of silicification and precious metal mineralization. In 1994, Hudson Bay Mining and Smelting completed 773.4 metres of diamond drilling in 5 holes, testing IP anomalies. In 1996, a further 6 holes, totalling 1610 metres were completed, testing deeper IP targets.

Trenching exposed cream coloured rhyolite to dacite that is variably silicified and argillically altered. Silica occurs as quartz-chalcedony veinlets, lenses and drusy cavities in clay altered volcanic rock. Pyrite (and marcasite?) is the only observable sulphide and is present in trace amounts to 5 per cent. Sulphides vary from coarsely crystalline to very fine grained and locally exhibit colloform banding. Gold and silver mineralization appears to be related to the presence of dark grey chalcedony.

A 2-metre channel sample from trench 89-9 assayed 0.22 gram per tonne gold and 4.5 grams per tonne silver (Assessment Report 20123). In 1994, a sample across 2.35 metres in DD94-4 assayed 4.25 grams per tonne gold and 29.7 grams per tonne silver (Explore BC 1995-96 application).

Work History
In 1988, Mingold (held by Hundson Bay Mining) staked the Loon claims after tracing mineralized epithermal boulders south of Ootsa Lake up-ice to outcroppings of similar material which contained up to 1026 grams per tonne silver and 5.4 grams per tonne gold.

In 1990, a small VLF-EM resistivity survey was completed and succeeded in outlining two distinct anomalous zones which coincided with the known areas of silicification and precious metal mineralization.

In 1994, Hudson Bay Mining and Smelting completed 773.4 metres of diamond drilling in 5 holes, testing IP anomalies. In 1994, a sample across 2.35 metres in DD94-4 assayed 4.25 grams per tonne gold and 29.7 grams per tonne silver. Soil surveys suggested that epithermal mineralization associated with the western most trenches (TR88-4, 5, 6) trends at approximately 020 degrees over a distance of 300 metres and possibly 1100 metres. Mingold ceased operations in 1990 and no further work was done. The Loon 2 claim was transferred to Hudson Bay Exploration in 1993.

1995, Hudson Bay personnel staked a total of 28 units to the north and west of the Loon 2 claim. A 22.5 kilometre grid extension was added to the new claims and. geological mapping and geochemical soil sampling was then conducted. The purpose of this program was to determine the extent of gold-silver mineralization to the north of previously found mineralization on the Loon. A total of 330 soil samples were collected. No geochemical anomalies were delineated. A trenching program was also conducted in order to test several IP anomalies from a survey done earlier in the year. Four of the eight trenches reached epithermally altered felsic volcanics. Sample results were mixed with the highest 2-metre chip assaying 0.23 gram per tonne gold (Assessment Report 24229).

Galambos (Assessment Report 34069) reported a further 6 holes totalling 1610 metres were drilled by Hudson Bay on the Loon property in 1996 but the verifying report was not indicated.

In 2012, RKG Exploration conducted a review and interpretation of Regional Geochemical data and regional 1st derivative magnetic data for the Loon claim owned by Ken Galambos but is actually both just north and east of the previously documented (in MINFILE) Loon showing location (Assessment Report 34069). Galombos reports that his 2012 claims are believed to cover the northeast extension to mineralization found at the original Loon showing but it is not clear if this means these extensions were actual or inferred.

See Uduk Lake (093F 057) for related geological details and work in the area to the immediate south.

Bibliography
EMPR ASS RPT 18637, 19320, *20123, 22977, 24229, 34069
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1993, pp. 9-14; 1994, pp. 167-170, 193-197
EMPR OF 2002-11
EMPR PF Placer Dome ( (1990-01-01): Loon Property Summary; Mingold Resources Inc. (1990-10-15): Summary Report on Mingold Resources Inc.)
EMPR PF Rimfire (Yarrow, E.W. (1992-12-06): Re: Loon Property Summary)
GSC MEM 324
GSC P 90-1F, pp. 115-120
Placer Dome File

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