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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  31-May-2022 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name MARBLE RIVER Mining Division Nanaimo
BCGS Map 092L044
Status Past Producer NTS Map 092L06W
Latitude 050º 26' 19'' UTM 09 (NAD 83)
Longitude 127º 23' 51'' Northing 5588626
Easting 613795
Commodities Limestone Deposit Types
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

Limestone was produced from three quarries along the Jeune Landing - Alice Lake Road in the vicinity of the southwest shore of Alice Lake.

The quarries lie within a 120-kilometre-long belt of limestone of the Upper Triassic Quatsino Formation (Vancouver Group) that extends discontinuously from Quatsino Sound southeastward to Tlupana Inlet. Locally the limestone is bounded to the west by underlying basalts of the Upper Triassic Karmutsen Formation (Vancouver Group) and intruded to the south by a stock of diorite of the Jurassic Island Plutonic Suite. The limestone strikes northwest and dips 12 to 40 degrees southwest.

The quarried rock generally consists of fine grained, light grey to black limestone that sometimes contains chert nodules. The largest of the three quarries, 0.5 kilometre northwest of the Marble River, exposes fine grained light grey limestone that is intruded by a dyke and several sills. In thin section the rock displays fine grained calcite that is sporadically replaced by coarser dolomite rhombs. A sample of randomly collected chips from the quarry contained 44.59 per cent CaO, 9.43 per cent MgO, 0.46 per cent insolubles, 0.30 per cent R2O3, 0.07 per cent Fe2O3, 0.004 per cent MnO, 0.01 per cent P2O5, less than 0.01 per cent sulphur and 45.31 per cent ignition loss (Minister of Mines Annual Report 1968, p. 318, Sample 13).

Bibliography
EMPR AR *1968-312,318
EMPR ASS RPT 37127, 38642
EMPR GEM 1970-255
EMPR MAP 1962 (092L06)
EMPR OF 1992-18, p. 43
EMPR PF (see 092L 057, Marble River Project, 1974, Zeballos Development Co. Ltd.)
GSC MAP 4-1974; 1552A
GSC OF 9; 170; 463
GSC P 69-1A; 70-1A; 72-44; *74-8

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