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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  27-Nov-14 by Laura deGroot(LDG)

Summary Help Help

NMI 082F7 Au1
BCGS Map 082F046
Status Developed Prospect NTS Map 082F07W
Latitude 49º 24' 41" N UTM 11 (NAD 83)
Longitude 116º 57' 48" W Northing 5473190
Easting 502660
Commodities Gold, Silver, Copper, Lead, Zinc Deposit Types G04 : Besshi massive sulphide Cu-Zn
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
E05 : Sandstone Pb
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The property is located at 1889 metres elevation on the south side of Midge Creek, some 39 kilometres east-southeast of Nelson.

The property originally consisted of two claims, the Wisconsin (Lot 2928) and Lucky Strike (Lot 2929), which were Crown-granted to C.A. Fleming & associates in 1899. Details of early activity are lacking but development work prior to 1903 included trenching, 2 crosscut adits and drifts totalling about 131 metres and a winze from No. 1 adit.

The property remained idle for many years, possibly due to the complex nature of the ore. The Porcupine Goldfields Development & Finance Company, Limited examined the property in 1926. Interior Mine-Development Company, Limited was incorporated in May 1928 by O. Frith and associates, of Nelson, to acquire a lease on the property. An electrical survey was carried out late that year by the Radiore Company of Canada. Eastern Canadian Interests examined the property in 1930. A Spokane company, General Mining, Milling & Leasing Company, reportedly held the property for a short period. Vancouver interests, under the name Lucky Strike Mining Syndicate, in 1933 carried out trenching, sampling and about 305 metres of diamond drilling in 3 holes.

In 1935 A.C. Frost and associates, of Seattle, acquired a lease on the property from the owners, C. Hussey and A. Fleming, of Spokane, and the H. Stambaugh Estate, of Youngston Ohio. Sixteen adjacent located claims in 3 groups were acquired; the Aerielle and Belkap groups by staking and the Strathcona group by lease from E.C. Wragge & associates, of Nelson. Work to mid 1937 included deepening the winze to 49 metres and drifting on the 46-metre level. Samples were sent to Mines Branch, Ottawa for tests.

A lease on the property was acquired in about 1939 by E. McQuade, of Ymir, apparently under the name Vendors, Limited. Canadian Exploration, Limited optioned the property in 1940 and carried out 76 metres of drifting and 55 metres of crosscutting on No. 1 level. The workings to date included numerous open cuts, a 34-metre shaft, and 5 adits. Number 1 adit comprised about 192 metres of drifts and crosscuts and a 49-metre winze; about 229 metres of drifting and crosscutting was done from the winze 46-metre level. Adit No. 3 comprised about 296 metres of drifts and crosscuts. Adit Nos. 2, 4 and 5 comprised about 61 metres of drifts and crosscuts; No. 4 adit is located to the northwest, on the other side of the ridge.

Esperanza Explorations Ltd. optioned the property in 1980 from owners Fleming, Stambaugh and associates. Work that year included geological and geochemical surveys. In 1984 BP Selco Inc. optioned the property. Work in 1984-85 included geological mapping, an electromagnetic survey over 24 kilometres and 2618 metres of diamond drilling in 14 holes. Dutch Creek Resources Ltd., under an option agreement with Esperanza Explorations in 1988 carried out diamond drilling.

The Wisconsin property is located near the southern end of the Kootenay Arc, a generally north trending, west dipping arcuate zone of metavolcanics and metasediments. The area is underlain by successively younger strata from east to west, ranging from the Helikian Purcell Supergroup in the east (by Kootenay Lake), through the Hadrynian Windermere Supergroup and Hadrynian-Lower Cambrian strata of the Hamill Group, Badshot and Mohican formations, and the Lower Cambrian and younger Lardeau Group to the west. All successions are cut by middle to late Mesozoic intrusive rocks.

The base of the Windermere assemblage unconformably overlies the Purcell Supergroup and is marked by a distinctive polymict conglomerate of the Toby Formation. Conformably overlying the Toby Formation are mafic volcanics of the Irene Volcanic Formation consisting of green mafic tuffs and massive to schistose greenstone. The upper Windermere succession, in conformable contact with the Irene Volcanic Formation, is made up of the Horsethief Creek Group consisting predominantly of argillite "grit" and phyllite with interbeds of grey limestone, quartzite and conglomerate or diamictite. Some workers divide the Horsethief Creek Group into two formations: the Monk Formation, the basal formation, consisting of two phyllitic units divided by a grey limestone member is overlain conformably by the Three Sisters Formation consisting of grits, quartzite and conglomerate. An upper grit unit of the Three Sisters Formation is thought to be the top of the Horsethief Creek Group locally marking the boundary to the conformably overlying Hamill Group (Assessment Report 14265).

The Wisconsin property is host to a stratabound sulphide horizon, occurring within the basal Horsethief Creek Group (Monk Formation) at the gradational contact between it and the underlying upper part of the Irene Volcanic Formation, a couple of hundred metres below the postulated fault contact with the Hamill Group. Hamill Group quartzites appear to be in fault contact with the lower Horsethief Creek Group immediately to the west of the Main zone sulphide horizon. Previous work shows the property to contain five or more arsenical base metal massive sulphide zones enriched in gold and silver. The mineralization shows evidence of recrystallization and local shearing, and in the Main zone area is located within, or at the contact between granodiorite and metasediments of the Horsethief Creek Group.

The Main zone is characterized by the presence of minor limestones, on the sulphide footwall, combined with a thicker and more extensive ankerite-dolomite-barite horizon at the southern extension of the sulphide horizon. The hangingwall to the sulphides are quartzites and sillimanite muscovite schists. The central portion of the sulphide zone has been extensively recrystallized and remobilized by a lobe of intrusive granodiorite which lies east of the main showings. In the vicinity of the sulphide horizon, at the main showing, the granodiorite exhibits crosscutting relationships both to the sulphides and host sediment-volcanic stratigraphy. All rock types are cut by late-state quartz veining. The granodiorite close to the main lobe of the intrusion has been incorporated as a complex system of sills within the host quartzites and volcanics. The footwall of the Main zone sulphides is formed by an interbedded sequence of quartzitic sediments and basaltic volcanics of the Irene Volcanic Formation.

The mineralization varies from massive to semimassive with varying proportions of arsenopyrite and pyrite making up the majority of the sulphides and lesser amounts of barite, galena, sphalerite, chalcopyrite, pyrrhotite and valleriite. Metallurgical examinations indicate that most gold is found as inclusions in chalcopyrite or with galena fracture fillings in pyrite and arsenopyrite. Thin section study of drill core indicates that alteration of the metasedimentary hostrock comprises muscovite, chlorite, sericite and carbonate. Further evidence in drill core shows at least two phases of mineralization, one of which consists of massive arsenopyrite- pyrite mineralization and the second consisting of lesser amounts of galena, sphalerite, arsenopyrite, pyrite and pyrrhotite associated with quartz veining (Assessment Report 14265).

Certain aspects of the Wisconsin deposit bear a striking similarity to the J & L "Sedex" deposit (082M 003) north of Revelstoke, including mineralogy, structure and roughly similar position within the Horsethief Creek-Hamill sedimentary pile. It is probable that the Wisconsin deposit is a Sedex (sedimentary exhalative) type which has been remobilized in the vicinity of the later granodioritic intrusion and re-deposited along shears developed along the granodiorite-metasediment contact (Assessment Report 14265).

Mineralization at Wisconsin has been extended by drilling 300 metres along strike and approximately 200 metres downdip on the Main zone with indication of increased grade and thickness to the north (Assessment Report 14265).

Inferred reserves at the Wisconsin property are 136,065 tonnes grading 11.99 grams per tonne gold and 171.4 grams per tonne silver (Northern Miner, November 1, 1984).

Ronald Granger conducted geochemistry, geological work and prospecting on the DI claims in 1997.

EMPR AR 1898-1084; 1899-601,845,847; 1903-H148,H149; 1928-C326; 1929-C356-C359; 1930-A278; 1933-A240; 1935-E27,G50; 1936-E43; 1937-E10, *E22-E27; 1940-A70
EMPR ASS RPT 8910, 14045, *14265, 15416, 26248
EMPR BULL 1 (1932), p. 108
EMPR EXPL 1985, p. C45
EMPR MAP 65 (1989)
EMPR OF 1998-10; 2000-22
EMPR PF (McLoughlin, R.H. (1926): Preliminary Report on the Wisconsin and Lucky Strike Group; 4 p.; Starr, C.C. (1926): Report of the Examination of the Wisconsin Mine, 12 p.; Crawford, E.P. and Weekes, F.R. (1936): Summary Report on the Wisconsin Mine, 3 p.; Starr, C.C. (1936): Report of Examination of the Wisconsin Mine, 11 p.; Several sketches by C.C. Starr of the Wisconsin Mine workings, accompanying his report of 1936; Assay Certificate; Starr, C.C. (1938): Report of Geological Examination of the Wisconsin Mine; Underground workings and surface cuts; Geology sketch maps; Prospectus, Dutch Creek Resources Ltd. - Nov. 24, 1987; Prospectors Report 1997-1 by Ron Granger; Prospectors Report 1999-9 by Ron Granger)
EMR MP CORPFILE (Esperanza Exploration Ltd.)
GSC MEM 76; 228, p. 65
GSC OF 481; 929; 2721
GCNL #218, 1980; Oct.26, 1984; #169, 1985; #79, 1988
N MINER Nov.1, 1984