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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  24-Jun-2022 by Karl A. Flower (KAF)

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NMI 092L12 Cu17
Name BOWERMAN, EXPO, DICTATOR Mining Division Nanaimo
BCGS Map 092L062
Status Showing NTS Map 092L12E
Latitude 050º 38' 52'' UTM 09 (NAD 83)
Longitude 127º 42' 17'' Northing 5611458
Easting 591574
Commodities Silver, Lead, Zinc, Copper, Gold Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Bowerman occurrence is located west of Wanokana Creek, approximately 10.1 kilometres northwest of Coal Harbour.

The area is underlain by northwest-trending mafic volcanic rocks of the Upper Triassic to Lower Jurassic Bonanza Group, primarily tuff breccia, lapilli tuff and tuff, which have been intruded by granodioritic rocks of the Jurassic Island Plutonic Suite.

Locally, a mineralized zone, approximately 60 metres wide, made up of breccia, quartz and calcite is erratically mineralized with pyrite, sphalerite and galena. The description of breccia, quartz and calcite is similar to the breccia found in several areas on the Expo (MINFILE 092L 240) property, but silver-lead-zinc mineralization suggests replacement mineralization in calcareous rocks.

In 1922, a grab sample assayed 27.4 grams per tonne silver, 1.7 per cent lead, 10.0 per cent zinc, nil copper and trace gold (Minister of Mines Annual Report 1922, page 232).

The area has been explored since the early 1900s, and by 1922 an upper adit 6.4 metres long, a lower adit 13.4 metres long and several opencuts had been excavated. In 1989, Caribbean Resources Corp. completed a program of stream sediment and rock sampling and geological mapping on the area as the Wanokana property.

EMPR AR 1918-268; 1919-205; *1922-232; 1968-84
EMPR ASS RPT 19179, 19180
EMPR GEM *1970-254
GSC MAP *4-1974; 1552A
GSC OF 9; 170; 463; 722
GSC P 69-1A; 72-44; *74-8; 79-30
CJES 18, p. 1; 20, p. 1, Jan., 1983
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