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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  15-Jul-2021 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name SOPHIA, GOSSAN, BLUE JAY 7 Mining Division Nicola
BCGS Map 092I037
Status Showing NTS Map 092I07E
Latitude 050º 18' 19'' UTM 10 (NAD 83)
Longitude 120º 43' 32'' Northing 5575048
Easting 661960
Commodities Lead, Zinc, Copper, Silver Deposit Types
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The Sophia (Gossan) occurrence is located northwest of Swakum Mountain and approximately 700 metres northeast of Sophia Lake.

The area is underlain by interbedded volcanic and sedimentary rocks belonging to the Upper Triassic Nicola Group. The volcanic rocks consist of andesitic flows, porphyries, breccias and tuffs intercalated with limestone, argillite, greywacke and conglomerate. Bedding indicates a regional asymmetric anticline has its axis plunging south-southeast near Swakum Mountain. The Nicola Group rocks are bounded to the east and west by Lower Jurassic granitic intrusives.

A 175-metre wide limestone bed is exposed by a north-trending ridge for greater than 600 metres along strike. The grey, coarse-grained limestone contains numerous fracture-controlled, randomly oriented calcite stringers generally less than 2 millimetres in width. Local brecciated zones are calcite-healed and oxidized (hematite, limonite). In the central portion of the property a feldspar porphyry intrusive with euhedral pyrite up to 10 millimetres in size contains quartz eyes throughout the matrix.

At the Sophia showing, mineralization occurs in a shear zone exposed in a trench. The zone is 8 metres wide, strikes 220 degrees and dips 30 to 60 degrees south. Calcite and quartz occur as narrow stringers in andesitic porphyry and as a cement in brecciated volcanics. Pyrite, sphalerite, galena, and chalcopyrite are associated with the quartz and calcite.

In 1978, drillhole no. 3 intersected galena-sphalerite mineralization along fracture plains associated with hematite and carbonate yielding 6.5 grams per tonne silver, 0.32 per cent lead and 0.53 per cent zinc over 0.3 metre (Property File 10631).

Work History

The Swakum Mountain area has been explored since the early 1900s, with numerous small shafts and pits being developed during this time.

In 1977, an electromagnetic and magnetometer survey and geochemical survey were completed on the area. The following year, Lockwood Mining completed an induced polarization survey and three diamond drill holes, totalling 176.1 metres. In 1979, a further six percussion drill holes were completed.

In 1983, two percussion drill holes, totalling 168 metres, were completed to test anomalous areas indicated in previous surveys. In 1986 and 1987, programs of electromagnetic (very low frequency), magnetic and induced polarization surveys were completed. In 1988, Corona Corp. completed an airborne geophysical survey on the area.

In 1991 and 1993, Hera Resources Inc. completed induced polarization surveys on the area. In 1995, Hera Resources completed four diamond drillholes, totalling 616.3 metres, on the Blue Jay 7 claim.

In 1998, Ahura Mining Ltd. prospected and sampled the area as the How 1-10 claims. The following year, a program of geological mapping, rock sampling and a 27.2 line-kilometre ground electromagnetic survey was completed on the claims. In 2000, Ahura Mining completed a program of geological mapping and geochemical (rock and soil) sampling on the How property.

During 2011 through 2016, Plate Resources Corp. completed programs of geological mapping, geochemical (rock and soil) sampling, airborne and ground geophysical surveys and diamond drilling on the area as part of the Lucky Mike property.

Bibliography
EMPR EXPL 1977-E148; 1978-E163; 1979-170; 1983-275; 1986-C231;
1987-C192
GSC MEM *249
GSC OF *980
EMPR EXPL 1989-119-134
Turner, J.A. (2012-09-17): Technical Report NI 43-101 for the Lucky Mike Copper-Tungsten Property
Turner, J.A. (2013-03-14): Technical Report NI 43-101 for the Lucky Mike Copper-Tungsten Property
EMPR PFD *10631

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