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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  25-May-1989 by George Owsiacki (GO)

Summary Help Help

NMI
Name LANA Mining Division Nanaimo
BCGS Map 092K014
Status Showing NTS Map 092K03W
Latitude 050º 09' 17'' UTM 10 (NAD 83)
Longitude 125º 17' 53'' Northing 5558362
Easting 335842
Commodities Copper Deposit Types D03 : Volcanic redbed Cu
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The western half of Quadra Island is underlain primarily by andesitic volcanic rocks of the Upper Triassic Karmutsen Formation which are overlain and bounded on the east by a northwest trending belt of Upper Triassic Quatsino Formation limestone, both of the Vancouver Group.

The area is underlain by highly fractured and sheared Upper Triassic Karmutsen Formation amygdaloidal andesitic flow rocks interlayered with dense, fine to medium grained andesitic units and minor thin beds of sedimentary and tuffaceous material. The flow rocks dip gently south and southeast and range in thickness from 0.3 to 3.6 metres and more. Many of the flows are highly amygdaloidal with the amygdules filled with calcite, quartz, chlorite, actinolite or prehnite. The rocks are chloritized and cut by numerous stringers and veinlets of quartz, calcite and epidote.

The Lana showing contains copper mineralization which has been documented from P. Eastwood's file.

Bibliography
EMPR PF (P. Eastwood file)
GSC MAP 1386A
GSC MEM 23, p. 146
GSC OF 480
GSC SUM RPT 1913, pp. 53-75
EMPR PFD 886692

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