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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  08-Nov-1996 by Larry Jones (LDJ)

Summary Help Help

NMI 082M7 Zn1
BCGS Map 082M046
Status Developed Prospect NTS Map 082M07W
Latitude 051º 26' 50'' UTM 11 (NAD 83)
Longitude 118º 49' 24'' Northing 5701136
Easting 373296
Commodities Lead, Zinc, Silver, Copper Deposit Types S01 : Broken Hill-type Pb-Zn-Ag+/-Cu
E14 : Sedimentary exhalative Zn-Pb-Ag
Tectonic Belt Omineca Terrane Monashee, Kootenay
Capsule Geology

The property lies within the Precambrian-Paleozoic(?) Shuswap Metamorphic Complex along the northwestern margin of the Frenchman Cap Dome. The core of the dome is composed of a mixed paragneiss and orthogneiss succession of probable Aphebian age. The dome is mantled by unconformably overlying metasedimentary rocks consisting of quartzites, calcareous schists, marbles and pelitic schists and locally intruded by carbonatite.

The metasediments comprise the limbs of the Grace Mountain syncline, a tight isoclinal fold trending southeasterly.

The mineralized zones occur on both limbs of the syncline within the 'Cottonbelt Sequence', a heterogeneous package of dominantly calcareous rocks (Fieldwork, 1978). At the base of the Cottonbelt sequence is a buff-weathering carbonatite layer overlain by calcareous schists and a calcareous to relatively pure white quartzite. A distinctive grey-weathering, white limestone overlies the quartzite, which is overlain by interlayered micaceous and calcareous schists and an impure grey-weathering crumbly limestone. The sulphide layer, enveloped by a thin layer of very siliceous calcareous schist and garnet sillimanite schist, defines the top of the Cottonbelt sequence.

The mineralization comprises an oxide-sulphide layer, traced intermittently through a strike length of 5 kilometres in the western (upper) limb (Cotton Belt zone) of the Grace Mountain syncline and 2 kilometres in the lower limb (McLeod zone). It varies in thickness from a few tens of centimetres to approximately 2 metres. Mineralization generally consists of coarse-grained sphalerite, magnetite, galena and minor pyrrhotite in a dark green, pyroxene- amphibole-quartz-garnet 'skarn' rock or, as layers within a lighter coloured, more siliceous calcareous gneiss, or as disseminated grains in a siliceous granular marble.

The mineralized zones are parallel with bedding in the metasediments and dip about 35 degrees southwest. Several adits, shafts and raises have exposed mineralization intermittently over a strike distance of 1650 metres. The main ore zone, as exposed on surface, is up to 3.7 metres wide and 76 metres long.

About 2.5 kilometres northwest of the main zone, within the same stratigraphic unit, are several smaller occurrences of sulphides (see Copper King (082M 144)). The McLeod zone (082M 125) lies about 460 metres northeast of the Cotton Belt zone.

Unclassified reserves of the Cotton Belt zone are less than 1 million tonnes grading 6 per cent lead, 2 per cent zinc and 50 grams per tonne silver (Canadian Institute of Mining and Metallurgy Bulletin, April 1982, page 119).

In 1995, with Explore B.C. Program support, CanQuest Resource Corporation completed geological and geophysical surveys and 1937 metres of diamond drilling in 27 holes, confirming the great lateral extent but limited and very variable thickness of the deposit due to intense and complex deformation of the hostrocks (Explore B.C. Program 95/96 - M70). Resources are estimated at 725,000 tonnes grading 11 per cent combined lead and zinc (about 5 per cent lead and 6 per cent zinc) and 58.3 grams per tonne silver (Information Circular 1996-1, pages 23, 25).

EMPR AR 1905-195; 1906-174-175; 1907-131-133; 1908-123; 1909- 139-141; 1910-129; 1911-181; 1912-327; 1913-181-182,200-202; 1922-149-152; 1925-171-172; 1926-188-189; *1927-195-197,402; 1928-209-210; 1929-217; 1930-182-183
EMPR ASS RPT 486, 958, 1768, *2637, 4367, *6207, 6888, 7007, *13822, 23568, 23985, 24367, 24841
EMPR BULL 57, pp. 7,9,43; *80, pp. 74-83
EMPR EXPL 1976-64; 1977-93; 1978-109-110; 1985-C107; 1996-D5
EMPR Explore B.C. Program 95/96 - M70
EMPR FIELDWORK *1978, pp. 18-23; 1981, pp. 187-201; 1985, pp. 69,80; 2000, pp. 85-114
EMPR GEM 1970-318; 1973-116
EMPR INF CIRC 1996-1, p. 25
EMPR MAP 43; 65 (1989)
EMPR OF 1992-1; 1994-8; 1998-10; 2000-22
EMPR P 1991-4, pp. 71-88
EMPR PF (*Allen, A.R. (1966): Report on the Cottonbelt Property; Canquest Resource Corporation Website (Mar 1999): Cottonbelt Property, 11 p.; See OK, 092K 008 - Canquest Resource Corporation Corporate Profile Report (circa 2000), 9 p.; Canquest Resource Corporation, Prospectus, p. 17-28, 1995)
EMR MP CORPFILE (Seymour Mining Corporation Limited; Cotton Belt Mines Limited; Great Northern Petroleum & Mines Ltd.)
GSC EC GEOL 20, p. 304; 1, p. 506
GSC MAP 12-1964
GSC OF 637
GSC P 64-32, p. 28
CIM Special Volume No. 8, p. 235, Fig. 14-1 (Fyles, J.T. 1966)
CIM Vol.75, No.840, pp. 119,121,123 (Hoy, T. 1982)
EMJ July 1952, Vol.153, No.7, p. 156
GCNL Oct.25, 1983
Kovacik, J.C. (1977): Report on the Shuswap Joint Venture Project, Cottonbelt Claims; internal company report for Metallgesellschaft Canada Ltd.
Levin, P., McClaren, M. and Dickinson, R. (1976): Geological report on the Cottonbelt Pb/Zn occurrence 60 miles N. of Revelstoke, B.C.; internal company report for Metallgesellschaft Canada Ltd./United Mineral Services Ltd.
W MINER Feb. 1979, p. 15