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File Created: 06-Mar-1989 by Wim S. Vanderpoll (WV)
Last Edit:  07-Jan-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI 092L2 Au15
Name BRITANNIA DYKE, B-2 FR. (L. 1054) Mining Division Alberni
BCGS Map 092L006
Status Showing NTS Map 092L02W
Latitude 050º 01' 30'' UTM 09 (NAD 83)
Longitude 126º 48' 03'' Northing 5543727
Easting 657519
Commodities Gold, Molybdenum, Copper, Silver, Zinc Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Britannia Dike vein lies in the Zeballos gold camp and is located on the west side of Gold Valley Creek at an elevation of approximately 600 metres, 2 kilometres south of the creek’s junction with the Zeballos River.

Regionally, the area is underlain by Upper Triassic to Lower Jurassic Bonanza Group basaltic to rhyolitic volcanic rocks. Conformably underlying the Bonanza volcanic rocks are limestones and limy clastics of the Triassic to Lower Jurassic Parson Bay Formation (Bonanza and Vancouver groups) and Upper Triassic Quatsino Formation (Vancouver Group), and tholeiitic basalts of the Upper Triassic Karmutsen Formation (Vancouver Group). Dioritic to granodioritic plutons of the Zeballos intrusion phase of the Jurassic Island Plutonic Suite have intruded all older rocks. The Zeballos stock, a quartz diorite phase of the Eocene to Oligocene Mount Washington Plutonic Suite, is spatially related to gold-quartz veining in the area. Bedded rocks are predominantly northwest striking, southwest dipping, and anticlinally folded about a northwest axis.

The Dike vein is vuggy and hosts significant pyrite and minor chalcopyrite and sphalerite with sericitized wallrock up to 1 metre on either side of the vein. The vein has been traced intermittently in outcrop for approximately 150 metres along strike in a quartz diorite host.

In 1983, two samples (BB-002-83 and BB-003-83) from separate outcrops assayed 5.61 and 10.32 grams per tonne gold, 3.5 and 19.4 grams per tonne silver with 0.02 and 0.49 per cent copper, respectively (Assessment Report 12077).

Below the Dike vein and exposed in a road cut, a quartz diorite hosts narrow, 0.4 to 2-centimetre wide, vuggy quartz veins with pyrite and graphite and molybdenite coating cleavage faces over an area approximately 60 metres wide.

In 1983, three samples (BB-003-83, BB-004-83 and BB-005-83) yielded from 0.2 to 10.3 grams per tonne gold, trace to 0.172 per cent zinc and trace to 0.08 per cent molybdenum (Assessment Report 12077).

In 1988, four samples (43244 to 43247) assayed from 0.4 to 9.2 grams per tonne gold, 1.6 to 23.4 grams per tonne silver, trace to 0.357 per cent copper, trace to 0.248 per cent zinc and trace to 0.559 per cent molybdenum (Assessment Report 18556).

During the 1930s, the vein was explored by two adits, one of which was approximately 12 metres long at that time.

During 1981 through 1983, Impact Resources Inc. completed programs of geological mapping, prospecting and rock and soil sampling on the Central Zeballos property. In 1988, Canalaska Resources Ltd. optioned the Central Zeballos property from New Impact Resources Inc. and completed a program of geological mapping, geochemical (rock and soil) sampling and prospecting.

EMPR ASS RPT *12077, *18556
EMPR BULL 20-V; 27, p. 97
EMPR EXPL 1983-330
EMPR FIELDWORK 1982, p. 290; 1983, p. 219
GSC EC GEOL 1-1947
GSC MAP 4-1974; 255A; 1028A
GSC MEM 204; 272
GSC OF 9; 170; 463
GSC P 38-5; 40-12, p. 21; 69-1A; 70-1A; 72-44; 74-8; 79-30
GSC SUM RPT 1929A; 1932A
CIM TRANS Vol. 42, 1939, pp. 225-237; 1948, pp. 78-85; 72,
pp. 116-125
N MINER Apr., 1938, pp. 39-45
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
Stevenson, J.S. (1938): Lode Gold Deposits of the Zeballos Area