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File Created: 13-Mar-1989 by Wim S. Vanderpoll (WV)
Last Edit:  31-Jan-2008 by Laura deGroot (LDG)

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NMI
Name PRIVATEER P4A, RIVERSIDE (L.1781) Mining Division Alberni
BCGS Map 092L006
Status Prospect NTS Map 092L02W
Latitude 050º 01' 39'' UTM 09 (NAD 83)
Longitude 126º 49' 35'' Northing 5543952
Easting 655681
Commodities Gold, Silver, Lead, Copper, Zinc Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell, Plutonic Rocks
Capsule Geology

The Privateer P4A vein lies in the Zeballos gold camp which is underlain by the Lower Jurassic Bonanza Group. The Bonanza Group is an island arc sequence consisting of basaltic to rhyolitic volcanic rocks. Conformably underlying the Bonanza Group rocks are limestones and limy clastics of the Quatsino and Parson Bay formations, and Karmutsen Formation tholeiitic basalts, all belonging to the Upper Triassic Vancouver Group. Dioritic to granodioritic plutons of the Zeballos intrusion phase of the Jurassic Island Intrusions have intruded all older rocks. The Zeballos stock, a quartz diorite phase of the Eocene Catface Intrusions, is spatially related to the areas gold-quartz veins. Bedded rocks are predominantly northwest strik- ing, southwest dipping, and anticlinally folded about a northwest axis.

The P4A vein strikes 070 degrees and dips 75 degrees north, following a 10 metre wide fracture zone in andesitic pyroclastics of the Bonanza Group. The vein is to 20 centimetres wide but averages about 7.5 centimetres and is often lensy. The quartz gangue contains varying amounts of pyrite, arsenopyrite, pyrrhotite, chalcopyrite, sphalerite and coarse calcite. Gold values to 19.9 grams per tonne were obtained from massive pyrite. A sample of pyrite-sphalerite galena with vein quartz assayed 62.4 grams per tonne gold, 178.3 grams per tonne silver, 0.14 per cent copper, 5.36 per cent lead and 2.77 per cent zinc (Bulletin 27, page 71). The vein is located 0.7 kilometres west of the Privateer mine (092L 008).

Bibliography
EMPR BULL 20-V; *27, p. 70
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; 69-1A; 70-1A; 72-44; 74-8; 79-30
GSC SUM RPT 1929A; 1932AII
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.: Lode Gold Deposits of the Zeballos Area, 1938
EMPR PFD 521865

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