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File Created: 28-Mar-1988 by Jennifer W. Pell (JP)
Last Edit:  01-Jan-0001 by BC Geological Survey (BCGS)

Summary Help Help

NMI
Name PASSMORE DOME Mining Division Slocan
BCGS Map 082F052
Status Showing NTS Map 082F12E
Latitude 049º 35' 27'' UTM 11 (NAD 83)
Longitude 117º 42' 04'' Northing 5493375
Easting 449328
Commodities Sillimanite, Garnet Deposit Types P02 : Kyanite-sillimanite schists
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

Coarse metapelitic gneisses containing abundant sillimanite and garnet are reported from the Valhalla and Passmore dome area west of Slocan Lake (Reesor, 1965). Valhalla and Passmore are two of a series of domal structures containing gneisses which form part of the core of the Shuswap Metamorphic Complex. The core of the Valhalla dome comprises orthogneisses which are mantled by hybrid gneisses predominantly metasedimentary in origin. Sillimanite locally comprises 20 to 25 per cent of sillimanite-garnet-biotite gneisses of the hybrid gneiss zone, particularly along the east flank of the Valhalla dome and may be very coarse. In the vicinity of the Passmore dome coarse sillimanite may occur in knots or groups of crystals over 2.5 centimetres long and 1 centimetre wide. These gneisses may also locally contain up to 30 per cent garnet, with an average crystal size of 0.5 centimetres or less. Garnet may also be present in interbedded amphibolitic rocks in amounts up to 40 per cent (Reesor, 1965).

Bibliography
EMPR OF 1988-26
GSC BULL *129

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