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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  15-Jan-2004 by Robert H. Pinsent (RHP)

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Name FOGGY DAY, BRONZE, CAT Mining Division Revelstoke
BCGS Map 082K064
Status Past Producer NTS Map 082K11W
Latitude 050º 36' 10'' UTM 11 (NAD 83)
Longitude 117º 20' 25'' Northing 5605709
Easting 475920
Commodities Gold, Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Kootenay
Capsule Geology

The Foggy Day prospect straddles the divide between Laughton Creek, which drains to the southwest into Trout Lake, and Brown Creek, which drains to the northeast into Lardeau Creek. The tenure is at approximately 2350 metres elevation, along the crest of Silver Cup Ridge. It was staked to the southeast of, and abutted against, the Alice (L.7440) [082KNW165] property. The Foggy Day vein is exposed in a precipitous bluff 457 metres to the southeast of the Alice vein and may be its continuation. The Alice vein is also known as the Sunshine vein.

The Foggy Day claim was located in the early 1900s and was acquired by Mrs. Jowett. She optioned the property to the Silver Crown Mining Company Limited in 1922 and 1923 and, later continued to work the claim, along with the U & I [082KNW023], Alpine [082KN214] and Hercules [082KNW104] herself. There were four short adits and several open cuts on the property by 1929. The property was part of Trans-Western Oil's, Winslow Group in the early 1960s. However, it does not appear to have been included in ground later held by Winslow Gold Corporation in the mid 1980s. It was owned by Skyworld Development and Resources Limited in 1987. The Trout Lake area is underlain by a thick succession of sedimentary and volcanic rocks of the Badshot Formation and Lardeau Group near the northern end of the Kootenay arc, an arcuate, north to northwest trending belt of Paleozoic and Mesozoic strata that is now classified as a distinct, pericratonic, terrane. The arc rocks are bordered by Precambrian quartzite in the east and they young to the west, where they are bounded by Jurassic-age intrusive complexes. They were deformed during the Antler orogeny in Devonian-Mississippian time and were refolded and faulted during the Columbian orogeny, in the Middle Jurassic. A large panel, the "Selkirk allochthon", was later offset to the northeast by dip-slip motion along the Columbia River Fault.

The Badshot Formation is composed of a thick Cambrian limestone that is a distinctive marker horizon in the Trout Lake area. It is underlain by Hamill Group quartzite, and it is overlain by a younger assemblage of limestone, calcareous, graphitic and siliceous argillite and siltstone, sandstone, quartzite and conglomerate, and also mafic volcanic flows, tuffs and breccias, all of which belong to the Lardeau Group. The rocks are isoclinally folded and intensely deformed, but only weakly metamorphosed. They occur as intercalated beds of marble, quartzite and grey, green and black phyllite and schist. Fyles and Eastwood (EMPR BULL 45) subdivided the group into six formations (Index, Triune, Ajax, Sharon Creek, Jowett and Broadview) of which the lowermost (Index) and uppermost (Broadview) are the most widespread. The Triune (siliceous argillite), Ajax (quartzite) and Sharon Creek (siliceous argillite) are restricted to the Trout Lake area. The Jowett is a mafic volcanic unit.

The Foggy Day property is largely underlain by black, siliceous, argillite of the Sharon Creek Formation which lies in the hanging wall of a thick package of Ajax Formation quartzite. The Sharon Creek rocks are faulted against a small amount of altered, green, gritty metasediment of the Broadview Formation on their southwestern side. The rocks are all highly folded, deformed and schistose. They are locally talcose. The main foliation strikes to the northwest and dips at a moderate angle to the northeast.

The Foggy Day quartz vein cuts Sharon Creek Formation schists and phyllites and is similar in style and form to the Alice [082KNW165] vein but has better width. McDougall (Report on the Winslow Group and Associated Properties and Spider Mine, 1949) believes them to be the same vein, although the Foggy Day vein has a slightly more easterly strike than the 007 degrees observed at the Alice. However, the shallow-overall dip of the vein may exaggerate the difference. The vein is between 0.61 and 1.52 metres wide and cuts grey, talcose schist which is noticeably crushed and decomposed in the vicinity of the vein. Gold-bearing quartz is honey combed and stained with iron oxide, and good gold values are found along the foot and hanging walls. There are numerous old workings that expose irregular, lens-like, quartz veins of doubtful continuity. The pyrite and lesser galena, sphalerite and tetrahedrite occur as cement in crush-zones within the veins.

One of the two lower adits was driven into the vein in a northeast direction along its axis for a distance of 23.5 metres. At its face, the vein steepens from its usual dip of 12 to 20 degrees east to 43 degrees east. Four samples collected in 1946 range from a low of 1.37 grams per tonne gold and a trace of silver over 0.61 metre, to a high of 41.14 grams per tonne gold and 116.6 grams per tonne silver over 0.94 metre. A number of small shipments of hand-sorted ore are reported to have been made between November, 1917 and March 1919. However, it is not clear that they all came from the Foggy Day. According to McDougall (Report on the Winslow Group and Associated Properties and Spider Mine, 1949) some came from the No. 3 adit on the neighbouring Alice [082KNW165] property. One of the shipments made in 1917 assayed 149.1 grams per tonne gold and 476.6 grams per tonne silver and 4.6 per cent lead. Two samples of hand-cobbed sacked ore remaining at the portal in 1946 assayed 65.1 grams per tonne gold and 205.7 grams per tonne silver, and 92.6 grams per tonne gold and 603.4 grams per tonne silver.

EMPR AR 1917-F165,F191; *1918-K157; 1921-G161; 1922-N217; 1923-A234;
1930-A267; *1931-A151; *1934-E36
EMPR ASS RPT 8642, 16077, *18095
EMPR OF 1990-24
EMPR PF (*Report by B.W.W. McDougall on the Winslow Group and
Associated Properties and the Spider Mine, 1949: See Winslow
GSC MEM 161-47
EMPR PFD 4084, 680205