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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  31-Mar-2014 by Karl A. Flower (KAF)

Summary Help Help

NMI 092L3 Fe2
Name LITTLE LAKE, LIT 1-56 Mining Division Alberni
BCGS Map 092L023
Status Developed Prospect NTS Map 092L03W
Latitude 050º 14' 23'' UTM 09 (NAD 83)
Longitude 127º 28' 04'' Northing 5566408
Easting 609261
Commodities Iron, Magnetite, Copper Deposit Types K03 : Fe skarn
Tectonic Belt Insular Terrane Wrangell, Plutonic Rocks
Capsule Geology

The Little Lake occurrence is located on a south facing slope between the Power and Ououkinsh rivers

The area is underlain by vertically dipping, northwest striking medium to thickly bedded basalt, rhyolite, andesite, andesite breccia, agglomerate and argillite of the Lower Jurassic Bonanza Group. The Bonanza Group rocks have been intruded by an 0.8 kilometre wide apophysis of diorite to quartz diorite stock located 1.6 kilometres to the southeast. The diorite is in turn intruded by diabase and quartz-porphyry dikes, possibly related to the quartz- monzonite porphyry stock at the head of Ououkinsh Inlet. These intrusives are part of the Early to Middle Jurassic Island Plutonic Suite.

The occurrence is a contact metasomatic magnetite-pyrite deposit where the sulphides have replaced volcanic flows and related pyroclastic and sedimentary rocks of the Bonanza Group. Magnetite mineralization is localized in fault zones and adjacent fractured or permeable beds, and limited by flat-lying or east dipping diorite dikes. Propylitic, chlorite and skarn alteration are common.

In 1974, sampling of 28 trenches on the South Grid area gave an un-weighted average of 47.82 per cent total iron, 1.113 per cent sulphur and 0.027 per cent copper over an average width of 3.6 metres (Assessment Report 5375, page 16).

In 1961, Rio Tinto completed a program of geological mapping and a ground magnetometer survey on the area as the Little Lake claims. In 1974, Texada Mines completed a program of rock sampling, geological mapping, trenching and a ground magnetometer survey on the area as the Lit 1-56 claims. In 1978, Geo-Lon Ventures acquired the property and completed a diamond drilling program of 8 holes, totalling 135.7 metres.

Bibliography
EMPR AR 1961-100; 1962-98
EMPR ASS RPT 379, *5375, 6831
EMPR EXPL 1978-C181
EMPR GEM 1974-210
EMPR PF (Rio Tinto 1961; Geology Map A and D Zones; Texada Mining
1974, 1975, Various Maps (copies of Assessment Report 5375);
Reserve calculations, North and South areas, 1975)
GSC ANN RPT 1886
GSC MAP 4-1974; 255A; 1552A
GSC OF 9; 170; 463
GSC P 69-1A; 70-1A; 71-36; 72-44; 74-8; 79-30
GSC SUM RPT 1913; 1920A
Carson, D.J.T., (1968): Metallogenic Study of Vancouver Island with
emphasis on the Relationship of Plutonic Rocks to Mineral Deposits,
Ph.D. Thesis, Carleton University, Ottawa
Sangster, D.F., (1964): The Contact Metasomatic Magnetite Deposits
of Southwestern British Columbia, Ph.D. Thesis, University of
British Columbia

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