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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  04-Apr-2022 by Karl A. Flower (KAF)

Summary Help Help

Name HOPE Mining Division Atlin
BCGS Map 104K017
Status Showing NTS Map 104K02E
Latitude 058º 08' 19'' UTM 08 (NAD 83)
Longitude 132º 37' 20'' Northing 6446610
Easting 639987
Commodities Silver, Lead, Zinc, Molybdenum Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Coast Crystalline Terrane Stikine
Capsule Geology

Fine-grained clastic sediments and intercalated volcanics of pre-Upper Triassic Age are cut and bounded by major northeast and northwest trending faults. Foliated quartz diorite of Triassic Age and intruding biotite-hornblende quartz monzonite lie to the north. The monzonite, which is probably genetically related to the Sloko Group of Cretaceous to Tertiary age, extends to the southwest and is fault bounded by two northeast trending faults. The southernmost northeast trending fault truncates two subparallel northwest trending faults and is flanked on the east by rhyolite of the Sloko Group.

The southern, northeast trending fault is over 15 kilometres long and has an associated extensive highly fractured, fissile, and bleached alteration zone, up to 100 metres wide. Locally, small gossans (20 to 50 metres wide) occur along this fault. A sample of one of these gossans with disseminated pyrite assayed 16 grams per tonne silver, 0.1 per cent lead, and 0.07 per cent zinc (Assessment Report 14363). A sample of a gossan, about 2 kilometres to the east-southeast, assayed 0.685 per cent zinc (Sample 73246, Assessment Report 14363). A boulder sample just over 500 metres north of sample 73246 yielded 0.037 per cent molybdenum. The boulder was at the north end of a boulder train which may have had its source in the area of sample 73246.

In 1985, Noranda Mining and Exploration Inc collected silt and pan concentrate samples from major tributaries draining the Hope property (Hope 2,3,5,6,8 claims) yielding gold values ranging from 630 to 1,750 parts per billion (Assessment Report 14363). The 1985 work program includes detailed prospecting, sampling, and geological mapping at a 1:10,000 scale. A total of 54 rock and talus fines samples were taken. Along the southernmost northeast trending fault, three prominent gossans were sampled. A total of 8 silt samples were taken during this program. Silt sample S69827 ran 300 parts per million zinc and 240 parts per million gold. A pan concentrate sample ran 1,900 parts per billion gold and 0.4 part per million silver in the major south draining creek below the anomalous silt sample S69827. Twenty soil samples were taken at 25 metre intervals directly over the northwest trending fault zone separating Carboniferous rocks of the Stikine assemblage and Eocene Sloko-Hyder Plutonic Suite quartz monzonite. No gold anomalies were detected; however, values ran up to 550 parts per million zinc and 130 parts per million arsenic were obtained (Assessment Report 14363).

EMPR EXPL 1986-449
EMPR PFD 842562, 842563, 842637
GSC MAP 6-1960; 1262A
Burrell, H., Deiss, A.M. (2021-06-23): Thorn Property NI 43-101 Technical Report Sutlahine River Area, British Columbia, Atlin Mining Division