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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  01-May-12 by Larry Jones(LDJ)

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NMI 082F6 Au9
Name YMIR (L.1708), YMIR CONSOLIDATED, BONANAZA, YMIR-GOODENOUGH, ROCKLAND (L.1709), MUGWAMP (L.1710), PROTECTION, GOLDEN HORN (L.1711), YMIR FR. Mining Division Nelson
BCGS Map 082F035
Status Past Producer NTS Map 082F06E
Latitude 49º 19' 19" N UTM 11 (NAD 83)
Longitude 117º 10' 17" W Northing 5463260
Easting 487545
Commodities Gold, Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel
Capsule Geology

The property is located at the 1372 metres elevation on the west side of Huckleberry (north fork of Wild Horse) Creek, 5.6 kilometres northeast of Ymir.

The Ymir, Rockland, and Mugwump claims, staked in July and August 1895 by Joseph and Jerome Petrie and Oliver Blair, were in May 1897. The Golden Horn and Robertson and Nora Fractions were staked in 1896 by Petrie, Wood, and Robertson and Crown-granted (Lots 1711, 1712, 2301, respectively) in 1897 and 1898. The Poutney and Lawrence Fractions were staked by the operating company in 1897 and Crown-granted (Lots 2302 and 2303) in 1898.

The property was acquired in November 1896 by The London and British Columbia Goldfields Limited. A program of extensive underground development was begun. A mill was built at the 1036-metre elevation, with a 732-metre tramway to No. 3 adit. A subsidiary company, The Ymir Gold Mines, Limited, was incorporated in London, England, in August 1898 to be the operating company. An 80-stamp mill was put into operation in 1900 and a cyanide plant for treating the tailings was installed in 1901. The No. 10 level crosscut was collared just above the mill and by 1902 had been driven 657 metres to intersect the vein 305 metres below the outcrop. Development work in the upper levels was done in Nos. 2 and 3 adits, and on Nos. 4 and 5 levels from a winze from No. 3 adit. No. 10 level was connected by a raise to the winze from No. 3 adit. Little ore was found below the 7th level. By 1904 the milling operation was reduced to 40 stamps. Production gradually decreased until the mine closed in 1908. During 1907-08 considerable surface exploration was carried out in search for the source of mineralized float occurring further up the mountain. On No. 2 level a crosscut was driven 244 metres into the hill in search for a parallel vein. On No. 10 level the vein was drifted on for 335 metres to the east.

Ymir Gold Mines, Limited, a private company incorporated in February 1933 by J.F. Coats and associates of Vancouver to acquire the adjacent Goodenough property (082FSW073), acquired an option on the Ymir mine but no work was reported under this agreement.

Ymir Consolidated Gold Mines, Limited, was incorporated in September 1934 to acquire and operate the Ymir, and Goodenough properties. Some high-grade ore was known to occur in the Goodenough, and sampling in the Ymir reportedly indicated large blocks of low-grade ore. On the basis of this the company installed a 125 ton-per-day mill at the Ymir property in 1935. The Goodenough ore had to be trucked to the mill. The mill operated from July 18th to November 30, 1935, mainly on Goodenough ore. Exploration in the east end of the upper Ymir workings located a small ore shoot and the mill resumed operating in June 1937 at 30 tons-per-day; milling operations continued into May 1938 when the company ceased operations. Lessees worked the property intermittently from 1937 to 1944, mining from pillars, stops remnants, and dumps.

Americonda Mines Limited, incorporated October 1956s held options on the Ymir and Goodenough properties. Only limited work on the Goodenough was reported during 1956.

Silver Dawn Mines Ltd. apparently held the Ymir and Goodenough properties in 1970. Some adits were rehabilitated and the workings prospected for scheelite.

The Ymir property was owned in 1973 by Murray Zulps and associates, of Vancouver. Some rehabilitation work was reported and a small amount of ore shipped. Issa Fahel optioned the 7 Crown-granted claims of the Ymir group from Zulps and associates in July 1975. This agreement to purchase was assigned to Junex Resources Ltd. in September 1975.

The deposit is hosted by Lower Jurassic Ymir Group schist, argillite and quartzite. Felsic dykes (up to 1 metre wide) strike 030 degrees and dip 74 degrees northwest crosscutting the host rocks. Augite basalt flows and flow breccias of the Lower Jurassic Elise Formation (Unit Je1), Rossland Group occur just to the west and the contact with the Middle to Late Jurassic Nelson batholith is about 1 kilometre to the east.

Pyrite is disseminated in quartz veins and throughout the sedimentary rock. Mineralization is confined to a shear zone trending northeast at 065 degrees with a 60 to 70 degree dip to the northwest. The shear crosscuts the sedimentary stratigraphy which strikes 035 degrees with a 70 degree northwest dip. Economic mineralization occurs as lenses with an easterly pitch and frequently contains narrow bands or inclusions of argillite.

The main ore zone, the Bonanza shoot, was about 146 metres long by 3 to 12 metres wide, averaging 4 metres in width. This zone was mined to a vertical depth of about 153 metres. Ore minerals consisted of pyrite, galena, and sphalerite and, near the surface where the vein is oxidized, cerussite and free gold are common. Below 150 metres depth quartz became more prominent and at about 300 metres ore mineralization is confined to streaks within the quartz. Ore material gradually decreased along strike to the east but to the west the vein was terminated by a fault.

The Protection (082FSW073) occurrence may be the western extension of the Ymir vein but the latter is much wider although other characteristics are similar.

The host rocks are crosscut by lamprophyre dykes, numerous faults and are complexly folded. However, there is no evidence of granitic intrusives associated with the ore zone as is common at some nearby deposits. The Tamarac (082FSW072), Protection (082FSW073), Ymir, and Good Hope (082FSW075) all appear to be located along the same shear related vein system although the same vein or shear may not be continuous through all properties.

The best assay from drilling in 1986 (DDH Y86-1) was from a 2-metre intersection (68 to 69 metres) from a drill hole east of the main shaft and below the No. 7 level workings. This assay was 6.5 grams per tonne gold, 38.05 grams per tonne silver, 1.33 per cent lead and 0.70 per cent zinc (Assessment Report 15524). It is suggested that 85,500 tonnes of ore remains in the old stopes.

Total production from 1895 to 1970 is 327,646 tonnes with a grade of about 10 grams per tonne gold and 34 grams per tonne silver. Combined lead and zinc content was about 1.7 per cent.

Bibliography
EMPR AR 1897-529,575; 1898-1158; 1899-556,598,692,713,815; 1900-
838,844; 1901-1032; 1902-158; 1903-28,145; 1904-26,122,135,
269; 1905-25,167; 1906-148,248; 1907-102,213; 1908-246; 1910-
106; 1915-135; 1917-168; 1922-209; 1923-214; 1924-192; 1925-248;
1926-275; 1927-301; 1928-330-331; 1929-239; 1930-269-270; 1931-136;
1932-187; 1933-227; 1934-E12-13; 1935-A28,E28,G50; 1936-E45,E64;
1937-E45; 1938-E37; 1939-82; 1940-67; 1941-65; 1942-62; 1943-64;
1944-A40,A60-61; 1949-164; 1951-136; 1952-144; 1957-43; 1958-37;
1959-61; 1960-A54,A67; 1964-115
EMPR ASS RPT *12562, 12993, *15524
EMPR BC METAL MM01095
EMPR BULL *1, pp. 102-104; 20, Part II, p. 10; 41; 109
EMPR FIELDWORK 1980, pp. 149-158; 1981, pp. 28-32, pp. 176-186; 1987,
pp. 19-30; 1988, pp. 33-43; 1989, pp. 247-249; 1990, pp. 291-300
EMPR GEM 1970-A40; 1973-64
EMPR MAP 7685G; RGS 1977; 8480G
EMPR OF 1988-1; *1989-11; 1991-16; 1998-10
EMPR PF (Plan of the Ymir Group, 1900; Ymir Mine - Plan and
Projection, 1926; Ymir Consolidated Gold Mines Ltd., Vertical
Projection through Ymir Mine, 1935; Ymir Consolidated Gold
Mines Ltd., Report of the Managing Director, 1939)
GSC ANN RPT 1897, pp. 10,31A-32A
GSC MAP 51-4A; 1090A; 1091A; 1144A
GSC MEM *94, pp. 100-107; 191, pp. 32-37; 308, pp. 111,155,157,173
GSC OF 1195
GSC P 49-22; 50-19; *51-4; 52-13
GSC SUM RPT 1908, pp. 13-15; 1911, pp. 139-157
AIME TRANS 397, 1938
CIM TRANS 1900, pp. 3-10 (Fowler, S.S.: Notes on the Ymir Mine & its
Mill Practice); #30, 1902; 1937, pp. 59-74 (McClelland, W.P.:
Laboratory tests and Milling Practice on British Columbia Ores)
CMJ 1933, Jul., pp. 259-264
GCNL #87; #120; #134; #154, 1984
N MINER Feb. 7, Jun. 4, 18, Aug. 29, Sept. 19, Oct. 3, Nov. 2, 21,
28, Dec. 19, 1935; Jan. 9, 16, Mar. 26, May 21, Dec. 31, 1936;
Feb. 18, Mar. 11, Apr. 8, Aug. 24, Sept. 2, 30, Dec. 16, 30,
1937; Apr. 7, 1938; Feb. 2, Oct. 26, 1939; Jan. 25, 1940; Jun. 18,
Dec. 24, 31, 1942; Dec. 2, 1943; Jan. 10, 1985

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