British Columbia Ministry of Energy, Mines and Natural Gas and Responsible for Housing
News | The Premier Online | Ministries & Organizations | Job Opportunities | Main Index

MINFILE Home page  ARIS Home page  MINFILE Search page  Property File Search
Help Help
File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-Oct-2014 by Laura deGroot (LDG)

Summary Help Help

NMI
Name GOOD HOPE (L.394) Mining Division Alberni
BCGS Map 092F021
Status Prospect NTS Map 092F05W
Latitude 049º 15' 54'' UTM 10 (NAD 83)
Longitude 125º 55' 09'' Northing 5461016
Easting 287633
Commodities Gold, Silver, Copper Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Good Hope occurrence is located near the western shore of Cypress Bay, across from Rhodes Island.

The area is underlain predominantly by a northwest trending sequence of mafic volcanics and sediments. Originally assigned to the Sicker Group, this sequence may be more closely related to the Mississippian to Pennsylvanian Fourth Lake Formation, Buttle Lake Group. These are intruded by Paleozoic or Triassic diabasic sills and feldspar porphyritic dykes of possible Tertiary age. Gneisses, hornfelsic basalts and amphibolites of the pre-Jurassic Westcoast Complex are in a gradational contact with these rocks. This complex is considered to be derived largely from Paleozoic and Mesozoic rocks which were migmatized in early Jurassic time. The mobilized granitoid portion was thought to have become the source for the Early to Middle Jurassic Island Intrusions but new data suggests a mantle derived source.

Locally, a number of mineralized quartz veins have been explored by historic open cuts, adits and shafts.

The main quartz vein (No. 1), as exposed at the adit, is 1 to 2 metres in width and striking 100 degrees with a dip of 37 degrees to the south west through diabasic rock. Other rock types mapped near the adit site include andesite, amphibole gabbro and diorite gneiss (Assessment Report 4177 Plate 1, Map #5). The quartz is mineralized with chalcopyrite, pyrite and pyrrhotite. By 1906, about 240 metres of drifting and crosscutting had been completed. Results at the time were not considered significant but work was reported to be continuing (Minister of Mines Annual Report 1906). In 1984, rock samples from the adit assayed up to 0.55 grams per tonne gold and 18.9 grams per tonne silver (Assessment Report 17098). In 1994, a sample (94R-13) from the adit assayed 14.2 grams per tonne silver and 2.52 per cent copper (Assessment Report 23825).

A short distance to the east another quartz vein (No. 2), less than a metre in width, strikes 105 degrees and dips 75 degrees south. The mineralization is the same as the first vein. A sample taken from the second(?) vein assayed 6 per cent copper 68.57 grams per tonne silver and 10.29 grams per tonne gold (Minister of Mines Annual Report 1899, page 791). In 1994, a sample (94R-07) from the vein assayed 1.01 grams per tonne gold, 41.2 grams per tonne silver and 4.47 per cent copper (Assessment Report 23825).

A 8 metre deep shaft, located on a knoll north east of the main workings, exposes a 1.2 metre wide quartz vein (Vein 4). In 1994, a sample (94R-10) from the shaft assayed 4.2 grams per tonne silver and 0.326 per cent copper (Assessment Report 23825).

At tide water a tunnel, of unknown extent, explores a 0.25 metre wide mineralized quartz vein, over a strike length of at least 5 metres. In 1994, a sample (94R-12) from the tunnel assayed 0.473 grams per tonne gold, 17.1 grams per tonne silver and 3.57 per cent copper (Assessment Report 23825).

In 1972 and 1973, Texada Mines completed programs of geochemical sampling and geological mapping on the area as the Cypress and Top claims. In 1987, Suntac Minerals completed a program of rock and soil sampling and a ground electromagnetic survey on the area as the Good Friday claims. In 1994, the area was prospected by S. Salmon as the Overlord claim.

Bibliography
EMPR AR *1899-606,791; 1900-923; 1901-1098; 1902-233; 1903-193;
1905-212; *1906-188,199
EMPR ASS RPT *4177, *4688, *17098, *23825
EMPR EXPL 1986-C86
EMPR FIELDWORK 1988, pp. 61-74
EMPR GEM 1969-217, 1972-266, 1973-231
EMPR PF (Prospectus: Thunder Valley Mines Ltd., Aug. 24, 1971;
Prospectus: Suntac Minerals Corporation, July 11, 1988 (located
in Cyprus occurrence file, 092F 299); Prospecting Report 1994-29 by Simon Salmon on the Overlord (Good Hope) Workings in Cypress Bay)
GSC MAP 17-1968; 1386A
GSC OF 463
GSC P 68-50; 79-30
CJES Vol.24, No.10, 1987, pp. 2047-2064
Carson, D.J.T. (1968): Metallogenic Study of Vancouver Island With
Emphasis on the Relationships of Mineral Deposits to Plutonic
Rocks, Unpublished Ph.D. Thesis, Carleton University
Isachsen, C. (1984): Geology, Geochemistry and Geochronology of the
Westcoast Crystalline Complex and Related Rocks, Vancouver Island,
British Columbia, M.Sc. Thesis, University of British Columbia
EMPR PFD 7353, 7354, 672818

COPYRIGHT | DISCLAIMER | PRIVACY | ACCESSIBILITY