The North zone of the Foremore property is predominantly underlain by the Devono-Mississippian Stikine Assemblage, a suite of variably foliated mafic to felsic flows and volcaniclastics, interbedded limestone, and fine clastic sediments.
The North showing was located by Cominco Ltd personnel in 1989. In 1989 a geologic grid was established over the North Zone. Mapping and prospecting located finely laminated galena and sphalerite in felsic (quartz eye) volcanics and pyrite within the volcanics and graphitic/carbonaceous argillaceous phyllites. Outcrop sampling in the North Zone averaged 0.087 gram per tonne gold, 8 grams per tonne silver, 0.1 per cent copper, 0.3 per cent lead and 2.7 per cent zinc over an average sample width of 0.4 metre (Assessment Report 19379).
Along strike 1.25 kilometres to the northeast is the BRT showing (discovered in 2003) consisting of massive sulphides up to 3 metres in thickness exposed in a small creek at surface. Mineralization consists of semi-layered massive sphalerite, galena, pyrite, and lesser chalcopyrite in a quartz-rich gangue. The BRT showing and the North showing are interpreted to be part of the same stratigraphic interval. Both showings are hosted in pyritic quartz-sericite phyllites and schists within a larger thickness of northeast striking, southeast dipping chloritic, hematitic and carbonaceous phyllites.
Work History
In 1987, during helicopter reconnaissance in the headwaters of a south-flowing tributary of More Creek and Mess Creek, Cominco Ltd identified sulphide and gold rich mineralized boulders representing a variety of mineralized types. Between 1987 and 1992, and in 1996, Cominco spent over $2 million on geophysical, geochemical, geological and diamond drilling programs. Due to the location of many mineralized boulders at the north and south termini of the More Glacier, Cominco focussed their attention on searching up-ice (i.e. underneath the ice). Cominco allowed the property to lapse in 1999 and it was staked by Lorne Warren. Warren completed a program of prospecting and silt sampling in 2000. Rota Mines Inc. optioned the Foremore property in May 2002 and contracted Equity Engineering Ltd. to carry out a program of mapping, prospecting and geochemical sampling.
In 2002, Roca Mines optioned the Foremore Property and staked additional mineral claims. The 2002, the field program of Roca Mines consisted of prospecting, geological mapping, and soil and rock sampling. Work was focused on searching the areas upslope from the known mineralized boulder fields, as well as other mineralized zones delineated by the previous Cominco work. The rocks samples collected were both reconnaissance in nature, and were taken over known mineralized areas.
In 2003, Roca Mines Inc. continued work on its Foremore property targeting gold and volcanogenic massive sulphide deposits. Eleven diamond-drill holes were completed totaling 1031 metres.
In 2004, Roca conducted prospecting, geophysics and a 37-hole drill program focused along a 3.5 kilometre length of folded Devono-Mississippian volcanic and sedimentary rocks in the North zone that contains the BRT showing. The thickest intercept was in drill hole FM04-04 where 3.1 meters averaged 14.6 grams per tonne gold, 1114 grams per tonne silver, 0.2 per cent copper, 1.2 per cent lead and 6.6 per cent zinc (Exploration and Mining in BC 2004 page 30). The mineral horizon, represented by pyritic phyllite near the contact between felsic and overlying mafic volcanic rocks, was traced 1.6 km north and tested with holes spaced 200 to 400 meters apart. Several holes encountered multiple layers of massive sulphide, each 0.3 to 1.2 meters thick, over a 300-meter interval within the felsic sequence. Visible gold was noted in FM04-32 in a 0.8-meter-wide sulphide band and assayed 26.5 grams per tonne gold, 85 grams per tonne silver, 2.2 per cent copper, 1.3 per cent lead, 8.6 per cent zinc (Exploration and Mining in BC 2004 page 30).
In 2005, Roca cored 4 drill holes totalling 2,033 metres and completed geological mapping, rock and soil sampling surveys. In August a 700-line kilometre helicopter supported airborne magnetometer and electromagnetic survey was flown over 50 per cent of the Property. The integration of new and historic data into the MapInfo platform was initiated. Three holes totalling 2033 metres were drilled along near the Ryder showing (new MINFILE), intersecting significant intervals of low-grade sphalerite and chalcopyrite mineralization. Airborne geophysics (magnetics and electro-magnetics) was flown covering the present extents of the North Zone, as well as other mineralized areas. The Ryder showing is about 3 kilometers northeast of the North showing (104G 148).
In late August 2006, the Property was flown for orthophotography.
In 2007, Roca carried out a detailed mapping program in the Hanging Valley. A total of 149 rock and 231 soil samples were submitted for chemical analysis (Assessment Report 29475). Mineralized areas discussed include SG (104G 181), Antler, Zig Zag, Boulder and Heather. At least one sample was taken in the SG area.
In 2008, Roca conducted a program included gridding in four areas totalling 78.0 line kilometres. A total of 52.6 line kilometres of Induced Polarization (IP) surveys and 57.7 line kilometres of Total Field Ground Magnetometer surveys were completed. In addition, 3,299.4 metres of drilling was completed in 13 holes from which 890 samples were submitted for analytical work. During the course of geological mapping a total of 301 rock and 197 soil samples were submitted for chemical analysis. Mapping occurred in several areas including the HV/SBF, Roca Flats, Ryder, Westmore and Antler areas. One bedrock grab sample (926005) of heterolithic felsic agglomerate located 500 metres west of the SG showing yielded 0.75 per cent copper (Assessment Report 30246). Holes were drilled into the HV, SBF, Ryder, BRT and Westmore. No drilling was completed in the Antler area.
The Westmore drilling of 2008 was in that area known as the North zone, and designated in MINFILE as Foremore (104G 148). The Ryder showing (new to MINFILE in 2013) is about 3 kilometres northeast of the MINFILE plot for North zone and about 6.5 kilometres northeast of Westmore (104G 184).
Field work during 2011 by Roca consisted prospecting and geochemical sampling. This work concentrated on the hillside around the SG zone, a gold-rich volcanic hosted massive sulphide showing. The 2011 work involved collecting 818 soil samples at 25 metres spacing along the northwest slope of the hanging valley in an attempt to locate the source to the South Boulder Field an area comprised of sulphide-rich boulders and blocks that carry base and precious metal mineralization. Dispersion patterns of elements in soil indicated a large anomalous area below the SG showing and down slope from the Sunday showing.
In 2019, Sassy Resources Corp. completed a program of prospecting, geological mapping and geochemical sampling on the area as part of the Foremore property. An outcrop sample (B0020792) from the BRT zone assayed 0.39 gram per tonne gold, 197 grams per tonne silver and 1.69 per cent copper, whereas a 1.0-metre chip sample yielded 39.9 grams per tonne silver and 0.43 per cent copper (Sassy Resources Corporation [2019-12-31]: Amended Independent Technical Report - Foremore Au-Ag-Cu-Zn-Pb Property, British Columbia).
