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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  15-Feb-89 by Wim S. Vanderpoll(WV)

Summary Help Help

NMI 092L2 Au19
Name TAGORE, ELDORADO, NAYDA, GOLDEN WORM Mining Division Alberni
BCGS Map 092L006
Status Past Producer NTS Map 092L02W
Latitude 50º 00' 19" N UTM 09 (NAD 83)
Longitude 126º 50' 53" W Northing 5541436
Easting 654200
Commodities Gold, Silver, Copper, Zinc, Lead Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell, Plutonic Rocks
Capsule Geology

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

Recorded production for the camp totals 9465 kilograms gold and 4119 kilograms silver, from 652,000 tonnes of ore mined (Fieldwork 1982, page 291). Most production came from the Spud Valley and Privateer deposits.

The Tagore occurrence consists of a locally anastomosing quartz (plus or minus calcite) vein containing variable amounts of pyrr- hotite, sphalerite, chalcopyrite, galena, pyrite, free gold and an unidentified grey mineral. The vein, up to 38 centimetres wide but locally represented only by a barren, tight fissure trends southeast and dips vertically. It has been traced for 15 metres, and is hosted in Bonanza Group fine-grained green banded tuff with minor interbedded crystalline limestone striking 080 degrees and dipping 80 degrees north. Prior to the introduction of mineralization the volcanic assemblage was altered to garnet, epidote and chlorite, while limy beds were altered to garnet, diopside, quartz, calcite, albite and apatite, plus or minus sphalerite.

Several dykes and irregular bodies ranging from quartz gabbro with abundant magnetite to light grey micropegmatite are reported to occur (Bulletin 27, page 51). Lamprophyre dykes are also present. Where the veins cut through a 2.0 metre limestone band the fissure continues but the veining is absent. Similarly, where the vein cuts a 2.0 metre wide northeast trending diorite dyke, no mineralization is present.

In 1929, 1.8 tonnes of high grade ore were shipped of which 1371 grams of gold were recovered. From 1930 to 1939, 14 tonnes of ore was shipped from which 1245 grams of gold, 2022 grams of silver with 23 kilograms of copper and 20 kilograms of lead were recovered.

Bibliography
EMPR AR 1924-223; 1925-269; 1929-376; 1930-441; 1932-26,205;  1933-252; 1938-F47; 1939-41; 1940-72; 1946-179; 1947-181
EMPR ASS RPT 12863
EMPR BULL 20-V, p. 16; *27, p. 50
EMPR ENG INSP #61651
EMPR EXPL 1983-331
EMPR FIELDWORK 1982, p. 290; 1983, p. 219
EMPR PF (092L 005 - Golden Gate; 092E 023 - Answer; Claim Map  1939, 1:3600, Tagore MC)
EMR MP CORPFILE (Conquest Mines Ltd.)
Stevenson, J.S., (1938): Lode Gold Deposits of the Zeballos Area
GSC EC GEOL 1-1947
GSC MAP 4-1974; 255A; 1028A; 1552A
GSC MEM 204, p. 17; 272, pp. 47,65
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; 1932A11, p. 37
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

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