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File Created: 08-Apr-14 by Karl A. Flower(KAF)
Last Edit:  08-Apr-14 by Karl A. Flower(KAF)

Summary Help Help

NMI
Name BONANZA RIVER PLACER Mining Division Nanaimo
BCGS Map 092L037
Status Showing NTS Map 092L07E, 092L07W
Latitude 50º 19' 25" N UTM 09 (NAD 83)
Longitude 126º 43' 49" W Northing 5577076
Easting 661562
Commodities Gold Deposit Types C01 : Surficial placers
Tectonic Belt Insular Terrane Wrangell, Plutonic Rocks
Capsule Geology

The Bonanza River flows northwest from Mount Ashwood to Bonanza Lake and then north to Ida Lake and the Kokish River.

The area is underlain by basalts and lavas of the Upper Triassic Karmutsen Formation (Vancouver Group). The volcanics are intruded by Late Jurassic granodiorite of the Nimpkish Batholith, which is part of the Jurassic Island Plutonic Suite.

It appears that most of the gold is derived from bars or in crevices in the bedrock of the river bed, or from benches along the side of the creek.

In 1980, the Bonanza River and its tributaries were declared a designated placer area. Several placer claims were staked near the mouth of the Bonanza River on Bonanza Lake but no production from these claims has been recorded.

In 1988, panning of river concentrate from a canyon along the river yielded fine colours and a few flakes of gold (Assessment Report 17512).

Bibliography
EMPR ASS RPT *17512
GSC MAP 4-1974; 255A; 1029A; 1552A
GSC MEM 272

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