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:  04-Apr-2022 by Karl A. Flower (KAF)

Summary Help Help

NMI 104K7 Cu2
Name TUN Mining Division Atlin
BCGS Map 104K046
Status Showing NTS Map 104K07W
Latitude 058º 25' 49'' UTM 08 (NAD 83)
Longitude 132º 52' 23'' Northing 6478580
Easting 624197
Commodities Copper, Molybdenum Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Stikine
Capsule Geology

In the Tun showing area, foliated quartz diorite of Lower or Middle Triassic age are overlain by volcanics of the Upper Triassic Stuhini Group. These are intruded by quartz monzonite and monzonite of the Paleocene to Eocene Sloko-Hyder Plutonic Suite. The monzonites are intruded by a quartz feldspar porphyry and andesite dikes.

A 200-metre-wide mineralized, sheared and altered zone occurs in the quartz monzonite. The shears are 15 to 120 centimetres wide and strike 030 to 050 degrees with vertical dips. Alteration minerals include chlorite, clay, epidote and quartz within gouge and siderite and hematite within calcite-quartz veins. The veins contain disseminated chalcopyrite, bornite, and minor malachite and azurite. The copper mineralization and minor molybdenite is also disseminated within the quartz monzonite and a quartz-potassium feldspar pegmatite mass.

Work History

In 1973, the TUN Claim Group (TUN 1 to TUN 8 claims) was staked on behalf of Hudson Bay Exploration and Development Company Limited. The 1974 exploration program on the TUN Claim Group consisted of a chain and compass grid, covering much of the area of TUN 1 to TUN 4 claims, followed by a magnetometer survey, an EM-16 survey, geological mapping and sampling of the main showings.

In 2020, Brixton Metals Corporation completed a program of geochemical (rock and soil) sampling, a 12.5 line-kilometre ground induced polarization survey, a 715 line-kilometre airborne magnetic and electromagnetic survey and 19 diamond drill holes, totalling 5292 metres, on the area of as part of the Thorn property. Drilling was performed on the Outlaw (MINFILE 104K 176) occurrence area.

EMPR GEM 1974-350
EMPR PF (RPTS by Lefebure, D. (1987))
EMPR PFD 842242
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