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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  10-Aug-07 by Sarah Meredith-Jones(SMJ)

Summary Help Help

NMI 092E15 Au3
Name BEANO, BANKO, ZEB Mining Division Alberni
BCGS Map 092E096
Status Past Producer NTS Map 092E15W
Latitude 49º 59' 32" N UTM 09 (NAD 83)
Longitude 126º 49' 08" W Northing 5540046
Easting 656333
Commodities Gold, Silver, Iron, Copper Deposit Types
Tectonic Belt Insular Terrane Wrangell, Plutonic Rocks
Capsule Geology

The area is underlain by northwest striking, southwest dipping tuffs and basaltic to rhyolitic flows of the Lower Jurassic Bonanza Group. The Bonanza Group conformably overlies Upper Triassic Vancouver Group volcanics and calcareous sediments. These rocks are intruded by Jurassic and Eocene granodiorites of the Island and Catface Intrusions. At the Beano occurrence, Bonanza Group white dacite and andesite tuffs are interbedded with a 10 metre wide band of limestone near a small Eocene stock. The limestone has been actinolite-altered and contains pyrrhotite plus or minus chalcopyrite.

Three styles of mineralization are recognized: 1) zones of quartz-calcite-pyrrhotite stringers 2) disseminated pyrrhotite 3) lenses of massive pyrrhotite measuring to 0.3 by 1.2 metres, as en echelon replacement of limestone along fractures. There are two sets of workings. The lower one, in the Bingo/Beano Creek Canyon, at an elevation of 710 metres, has 2 short adits, ranging from 2.0 to 2.5 metres in length and 2 small open cuts, exposing an area of 25 metres. The upper showing, above the creek canyon wall at elevation 800 metres, was explored by 4 open cuts.

Samples of massive pyrrhotite in the area have assayed up to 321.7 grams per tonne gold and 6.8 grams per tonne silver over narrow widths (Bulletin 27 p.138). Between 1948 and 1949, 21 tonnes of high grade ore was shipped and 3297 grams of gold, 1400 grams of silver and 33 kilograms of copper were recovered.

Bibliography
EMPR AR 1938-F42; 1947-181; 1948-157
EMPR ASS RPT 4819, 5079, 9981, 12573, 12772
EMPR BC METAL MM00068
EMPR BULL 27, p. 138
EMPR EXPL 1981-172; 1983-191
EMPR GEM 1974-171
EMPR PF (Various maps; 1972 Annual Report: New Taku Mines Ltd.)
GSC MAP 1027A; 1537A
GSC MEM 272, p. 50
GSC OF 463
GSC P 40-12, p. 38; 72-44; 80-16
GCNL #87,#172, 1983; #240, 1988
W MINER #46,Apr., 1939
Carson, D.J.T., (1968): Metallogenic Study of Vancouver Island with
emphasis on the Relationship of Plutonic Rocks to Mineral Deposits,
Ph.D. Thesis, Carleton University, Ottawa

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