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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  15-Jan-91 by Garry J. Payie(GJP)

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NMI 092C14 Hg1
Name SECHART (L.3), BALMORAL, AZOGIE, SECH 1 Mining Division Alberni
BCGS Map 092C094
Status Prospect NTS Map 092C14E
Latitude 48º 57' 37" N UTM 10 (NAD 83)
Longitude 125º 14' 38" W Northing 5425467
Easting 335752
Commodities Mercury Deposit Types I08 : Silica-Hg carbonate
H02 : Hot spring Hg
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Sechart mercury deposit is located 24 kilometres east of Ucluelet in Barclay Sound. The deposit, known since 1890, had considerable development work done on it by 1911. More development work was conducted from 1916 to 1917 and again in 1928 and 1969. To date, the property is developed by about 107 metres of drifts and two shafts, one 10 metres in depth and the other 5 metres.

The geology of the area is dominated by coarse-grained quartz diorite of the Paleozoic and/or Mesozoic Westcoast Complex, containing slices of metamorphic rock. To the north of the workings, Muller (Geological Survey of Canada Open File 821) has mapped a northwest trending pendant of limestone, of similar age to the Westcoast Complex.

In the immediate vicinity of the workings the rocks consist of andesitic greenstone, gabbro and minor limestone. The deposit occurs in ankeritized and silicified greenstone. Mineralization consists of patches and streaks of cinnabar and native mercury. The mercury mineralization penetrated along fault zones and fractures with associated silica flooding and sericite, chlorite and ankerite alteration. One sample taken in sheared rotten greenstone across 1.5 metres assayed 0.16 per cent mercury (Bulletin No.5, page 88). The narrow scattered zones of mercury are considered uneconomic.

Bibliography
EMPR AR 1896-556; 1911-191; 1916-325; 1921-348; *1927-341; *1929-373
EMPR ASS RPT *12196
EMPR BULL 1, p. 5; *5, p. 85
EMPR FIELDWORK 1989, pp. 503-510
EMPR GEM 1969-220
EMPR OF 1988-24; RGS 24, 1990
GSC MAP 196A; 1386A
GSC MEM 13
GSC OF 463; 821; 1272
GSC P 72-44; 76-1A; 79-30
GSC SUM RPT 1918B, p. 21; 1919B, p. 18
Carson, D.J.T. (1968): Metallogenic study of Vancouver Island with  emphasis on the relationships of mineral deposits to plutonic  rocks, Ph.D. Thesis, Carleton University
Hudson, R. (1997): A Field Guide to Gold, Gemstone & Mineral Sites of  British Columbia, Vol. 1: Vancouver Island, p. 148

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