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File Created: 05-Aug-1986 by Larry Jones (LDJ)
Last Edit:  31-Jan-1989 by Laura L. Duffett (LLD)

Summary Help Help

NMI
Name HAWKESBURY ISLAND KYANITE, HAWKESBURY SILLIMANITE, FISHTRAP BAY Mining Division Skeena
BCGS Map 103H055
Status Showing NTS Map 103H11E
Latitude 053º 34' 29'' UTM 09 (NAD 83)
Longitude 129º 02' 36'' Northing 5936208
Easting 497131
Commodities Kyanite, Sillimanite Deposit Types P02 : Kyanite-sillimanite schists
Tectonic Belt Coast Crystalline Terrane Undivided Metamorphic Assembl.
Capsule Geology

The central part of Hawkesbury Island is underlain by amphi- bolite, biotite schist, kyanite-staurolite-almandine mica schist, sericite-epidote schist, fine-grained sillimanite-quartz-plagioclase gneiss, graphitic plagioclase schists, quartzite, and crystalline limestone.

On Hawkesbury Island the kyanite-staurolite-almandine schists exposed contain up to 20 per cent almandine garnet and up to 20 per cent kyanite (Money, 1959). The kyanite may be extremely coarse with blades that reach 20 centimetres by 1 centimetre in size. The indi- vidual kyanite-staurolite-almandine schist units vary from a metre to over 30 metres in thickness and are traceable along strike for up to 2 kilometres (refer to Hawkesbury Island Garnet, 103H 057).

Sillimanite is reported from only one locality on Hawkesbury Island near Fishtrap Bay (refer to Area 2, Figure 10, Open File 1988- 26). At this locality, the sillmanite is present as rounded knots in gneiss and comprises up to 15 per cent of the rock (Money, 1959).

Bibliography
EMPR FIELDWORK 1987-424
EMPR IND MIN FILE (Andalusite, Kyanite, and Sillaminite Occurrences in BC (in Ministry Library))
EMPR OF 1988-26, p. 15
GSC MAP 23-1970; 1385A, 1868A
GSC P 70-41, p. 14
Money, P.L., (1959): The Geology of Hawkesbury Island, Skeena Mining Division, British Columbia, unpublished M.Sc. Thesis, University of British Columbia, Vancouver, British Columbia, 159 pgs.

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