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File Created: 07-Jul-1986 by Larry Jones (LDJ)
Last Edit:  06-Mar-1989 by Laura L. Duffett (LLD)

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NMI 103B6 Ni1
Name JOHNSON NICKEL Mining Division Skeena
BCGS Map 103B044
Status Showing NTS Map 103B06W
Latitude 052º 24' 54'' UTM 09 (NAD 83)
Longitude 131º 21' 41'' Northing 5809821
Easting 339404
Commodities Nickel, Copper Deposit Types M02 : Tholeiitic intrusion-hosted Ni-Cu
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The property is located at the northwestern end of Burnaby Island. The original discovery lies in the bottom of the westernmost north-flowing creek, about 183 metres from the shore.

The showing was apparently discovered by a Nick Johnson, who staked 2 claims. Silver Standard Mines Limited and Jedway Iron Ore Limited, a subsidiary of The Granby Mining Company Limited, optioned the 2 claims and staked an additional 138 claims. Joint exploration of the property was carried on from January 3rd to June 5th, 1963, and included geological mapping, magnetometer, electromagnetic, and geochemical soil surveys, trenching, and 565 metres of packsack diamond drilling in 30 holes. The diamond drilling showed the original discovery was confined to a small pocket. The geophysical work located other bodies of similar mineralization, none of which were considered to be large enough to warrant further work.

The area is underlain by limestones and argillites of the Jurassic to Triassic Kunga Group. These are intruded by small heterogeneous diorite stocks and later gabbro dikes and plugs related to the Middle to Late Jurassic Burnaby Island Plutonic Suite. The rocks are cut by north-northwest faults related to the Louscoone Inlet-Rennell Sound fault zone.

An outcrop, about 5.5 metres in diameter, consists of gabbro mineralized with pyrrhotite, chalcopyrite and bravoite with minor nickeliferous minerals. The occurrence contains about 1 per cent nickel and 1 per cent copper (Bulletin 54, page 216). The mineralized gabbro body is very localized, however, another mineralized outcrop was located several metres to the south.

Bibliography
EMPR AR *1963-18
EMPR ASS RPT *8094, *8251
EMPR BULL *54, p. 216
EMPR EXPL *1979-240; *1980-364
EMR MP CORPFILE (Silver Standard Mines Limited-Annual Reports 1963, 1964; The Granby Mining Company Limited)
GSC MAP 1385A
GSC P 88-1E, pp. 213-216,*221-227; 89-1H, pp. 95-104,*105-112; 90-10, pp. 59-87; 91-1A, pp. 383-391

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