The Mac property is located approximately 28 kilometres west of Grand Rapids and 100 kilometres northwest of Fort St. James.
The area is underlain primarily by Carboniferous to Permian Cache Creek Group volcanic and sedimentary rocks that, at the showings, consist of hornfelsed mafic volcanic rocks. These rocks are intruded by a siliceous, leucocratic quartz-monzonite stock of the Francois Lake Intrusive Suite.
The main zone of mineralization, referred to as the Camp zone, consists of an oxidized, multidirectional, molybdenite-bearing stockwork of quartz veins in pervasively kaolinized alaskite. Molybdenite forms coatings on the walls of the 2.0-millimetre to 2.5-centimetre wide quartz veins. Subordinate amounts of pyrite and traces of chalcopyrite are also present in the veins and traces of molybdenite occur between the veins as disseminations. The mineralization occurs over an area 750 metres by 350 metres and to a depth of 150 metres. Another type of mineralization consists of molybdenite in quartz veins and disseminations in the siliceous biotite hornfels.
In 1982, Riocanex Inc. (later named Rio Algom Exploration Inc.) executed a regional lake sediment sampling program in the area which detected anomalous molybdenum-copper-silver values in three lakes located in the southern portion of the current property. Rio Algom Exploration Inc. then staked the claims after finding molybdenite-bearing float and widespread anomalous molybdenum concentrations.
In 1983, Rio Algom Exploration Inc. completed soil sampling, geological mapping and rock chip sampling. Mineralized outcrop chip samples assayed between 0.034 and 0.25 per cent molybdenum (Assessment Report 11861). The soil survey outlined three anomalous zones: the Camp, Pond and Peak zones.
In 1984, Rio Algom Exploration Inc. conducted line cutting, soil and stream sediment sampling, ground magnetic geophysical surveys, trenching, geological mapping and rock sampling. A sample of mineralized leucocratic quartz-monzonite assayed 0.166 per cent molybdenum (Assessment Report 12881).
In 1989, Rio Algom Exploration Inc. completed twelve diamond drillholes totaling 1488 metres. Highlights of this program include drillhole DDH89-12, which returned 72.2 metres grading 0.201 per cent molybdenum and 0.21 per cent copper (Assessment Report 19451).
In 1995, Spokane Resources Ltd. (now Silvercorp Metals Inc.) entered into an option agreement with Rio Algom Exploration Inc. to earn 60 per cent working interest in the property, and later acquired 100 per cent interest by payment of 1.5 million shares to Rio Algom Exploration Inc.
Spokane Resources Ltd. and Rio Algom Exploration Inc. drilled the property in 1995 and 1996. Drillhole 95-15 intersected 137 metres grading 0.21 per cent molybdenum and 0.18 per cent copper (Northern Miner, March 11, 1996).
A geostatistical resource estimate confirms an indicated resource of 52 420 000 tonnes grading an MoS2 equivalent of 0.14 per cent MoS2 MoS2, and an inferred resource of 47 520 000 tonnes at an MoS2 equivalent of 0.12 per cent MoS2; the cutoff grade is 0.06 per cent MoS2 (George Cross News Letter No.43 (March 3), 1997).
This drilling outlined three distinct zones of porphyry molybdenum±copper mineralization contained within an alteration zone estimated to be 3.5 kilometres long by 2 kilometres wide: the Camp, Peak and Pond zones. A further 4434 metres were drilled in 34 holes in the fall of 1996. Drilling targeted the Camp zone, which is estimated to be 700 metres in length, 300 metres in width and at least 150 metres in depth. The company estimates the zone contains a potential geological resource of approximately 100 million tonnes, with an expected average grade of 0.15 per cent MoS2 and 0.12 per cent copper. Included within this estimate is the potential for approximately 20 million tonnes, with an expected average grade of 0.25 per cent MoS2 and 0.2 per cent copper (Information Circular 1997-1, page 27). Drilling on the Peak zone, located 1 kilometre south of the Camp zone, suggests an area of molybdenum-copper mineralization 1 kilometre in length by 500 metres in width, with potential to host 150 million tonnes of ore. The Pond zone, located approximately 1 kilometre north of the Camp zone, is estimated to be approximately 2 kilometres in length by 2 kilometres in width. Drilling indicates the Peak and Camp zones to be part of the same porphyry system. The Peak zone appears to contain more copper than the Camp zone.
In 1997, Spokane Resources Ltd. drilled three holes totalling 808 metres. A geostatistical resource estimate by Giroux Consultants Ltd. identified an indicated and inferred resource in the Camp zone of approximately 100 million tonnes, grading 0.062 per cent molybdenum and 0.085 per cent copper at a cut-off grade of 0.04 per cent molybdenum. This includes an indicated resource of 52 420 000 tonnes grading 0.084 per cent molybdenum equivalent and an inferred resource of 47 520 000 tonnes grading 0.072 per cent molybdenum equivalent. (Exploration in BC 1997, page 14 and Information Circular 1998-1, page 20.) The overall porphyry system, with two other zones of mineralization identified, is at least 3.5 kilometres long and up to 2 kilometres wide. The company engaged Fluor Daniel Wright to complete a preliminary economic study by 1998.
The age dates of the unmineralized core (136 Million years old) and of the mineralized edge of the Camp zone (142 Million years old) suggests that the mineralization may be a late porphyritic phase of the Francois Intrusions.
In 2007, Amarc Resources Ltd. completed a stream sediment sampling program in the area, omitting a small area that covered the Camp and Peak zones.
In 2009, the two claims covering the Camp and Peak zones lapsed and were staked by Kelly Funk.
In 2010, AZ Copper Corp. optioned the property and completed a compilation of geological data, core recovery and photo logging and a regional-scale magnetic profiling survey.
In 2011, Tribune Minerals Corp. acquired AZ Copper Corp., then changed their name to Stratton Resources Inc. and completed helicopter-borne ZTEM and magnetic geophysical surveys and a 44-hole diamond drill program totaling 10 067 metres. Highlights of this program include MC11-13, which returned 102 metres grading 0.204 per cent molybdenum and 0.234 per cent copper (Assessment Report 33182).
In May of 2012, Stratton Resources Inc. filed an NI 43-101 compliant resource estimate for the Mac property. This report showed an indicated resource of 70 360 000 tonnes grading 0.063 per cent molybdenum and 0.1 per cent copper, containing 44 334 tonnes of molybdenum and 70 370 tonnes of copper, and an inferred resource of 177 934 000 tonnes grading 0.042 per cent molybdenum and 0.05 per cent copper, containing 74 742 tonnes of molybdenum and 88 981 tonnes of copper, calculated using a 0.035 per cent molybdenum cut-off grade (Press Release, Stratton Resources Inc., April 24, 2012).
In 2013, Stratton Resources Inc. dropped their option on the Mac property.