The Mike occurrence is hosted by Stuhini Group (Stikine Terrane) basaltic to andesitic volcanic rocks of the Mess Lake facies, which are Upper Triassic in age. These volcanics are intruded by dacite to granodiorite dikes, whose origin is interpreted to be the nearby Hickman batholith, of the Middle to Late Triassic Stikine Plutonic Suite.
The original Nabs 13 showing is hosted in green Stuhin1 andesitic flows. These rocks are poorly exposed but are generally highly fractured and often epidotized. The main showing consists of pyrite and chalcopyrite along a silicified fracture zone in the andesite. Massive bornite veinlets also occur and epidotization along fractures is common. Nabs 13 was the 1966 claim (Map 2, Assessment Report 900). which covered the copper showings upon which this MINFILE occurrence was originally based; located about 100 metres west of the Mike zone as defined by the chargeability anomaly (Figure 8, Assessment Report 33938).
Rock types intersected at the Mike zone in drill hole SCK-13-431 include andesitic volcanics and volcaniclastic tuff, with minor epiclastics. Alteration is dominated by a propylitic assemblage consisting of chlorite-epidote +/- hematite +/- calcite. Intense epidote alteration selectively affects clasts within intervals of volcaniclastic tuff. A zone of sericite, clay, chlorite alteration occurs at 530.5-557.8 metres, within the prominent fault zone described above. Very minor K-feldspar alteration occurs in the porphyritic dike at 593.4-604.2 metres. This drill hole did not intersect any economically significant mineralization, however a large amount of disseminated pyrite was intersected over a wide interval in this hole. Trace chalcopyrite was found in isolated blebs sporadically throughout the hole.
In 2012, at the Mike zone, diamond-drill hole CF429-2012 intersected an average of 0.02 per cent copper, 0.02 gram per tonne gold and 1.09 grams per tonne silver over a core length of 84.49 metres starting at a core interval of 94.12 metres, with individual maximum sample concentrations of 0.05 per cent copper, 0.15 gram per tonne gold, 16.9 grams per tonne silver and 0.006 per cent molybdenum (Assessment Report 33938). Hole CF429-2012 is about 400 metres northwest of 2013 drill hole SCK-13-431.
WORK HISTORY
In 2012, Copper Fox Metals Inc continued exploring extensions and testing geophysical anomalies at the Schaft Creek project. The Titan-24 DC/IP/MT survey extended over an area from the north end of the Paramount zone through the Mike zone and to the ES zone a distance of 3.0 kilometres; a limited portion of 800 metres on the GK zone, north of the ES zone, was also completed (Figures 12 to 15, Assessment Report 33938). The chargeability anomaly in the Mike Zone has been extended 600 metres to the north and has a width between 500 to 600 metres. The total length of the Mike chargeability anomaly is about 1200 metres (Figure 8, Assessment Report 33938).
Drilling in 2012 totaled 2266 metres and generally targeted IP signatures similar to those associated with known mineralization in the Schaft Creek trend. Four holes targeted the Discovery Zone (104G 030), and two holes targeted the Mike Zone (104G 031).
In July 2013, Teck and Copper Fox formed the Schaft Creek Joint Venture, with Teck resuming as the project operator. Subsequent to the formation of this joint venture, Teck completed a program of 9 drill holes totalling 3,453 metres in 2013 at Discovery (104G 030), Mike (104G 031), and Paramount (104G 032). During 2013 and 2014, Teck also completed regional geological mapping, relogging of historical core, geological modeling, and an airborne geophysical survey. In 2013, 7 holes were drilled on the Paramount, one hole (SCK-13-431) was designed as an initial test of the Mike target area and one hole (SCK-13-436) was drilled on the Discovery zone to the northwest.
See Schaft Creek (104G 015) for common geological and work history details.
