The Mid zone is located about 1900 metres west of Todd Creek and near the headwaters of Rhyolite Creek, about 35 kilometres northeast of Stewart. Rhyolite Creek is a tributary of Todd Creek located about 18.5 kilometres south of the confluence of Todd Creek and the Bowser River.
The area is underlain by Hazelton Group rocks of the Lower Jurassic Unuk River Formation (Bulletin 63). Predominant, north to northwest striking and northeast dipping, maroon and grey andesite flows, agglomerates, tuffs and breccias are intercalated with lesser feldspar porphyry, dacitic volcaniclastics and rhyolite. The feldspar porphyry may include both intrusive and extrusive varieties. The felsic volcanics are moderately to strongly altered. Alteration consists of quartz-sericite-pyrite (Assessment Report 18800).
The Mid zone, comprising an area about 500 by 250 metres, encompasses several west-southwest to northwest trending quartz-pyrite-chalcopyrite veins. The veins are 0.01 to 6 metres wide and 1 to 108 metres long. Grab samples from the veins assayed up to 1.68 per cent copper with negligible molybdenum, lead, zinc, silver, arsenic, cadmium, antimony and gold values (Assessment Reports 15988, 17423).
The Yellow Bowl South area was located by helicopter reconnaissance surveys as snow waned on the upper levels of the Yellow Bowl zone in July 2007. The follow-up of the favorable structural fabric and alteration in the small part of an extensive gossan zone was immediately indicative of a significant gold-copper target associated with intensely sulphidized, deformed pyroclastic rocks and possible felsic flows, thought to be underlain by a large intrusion. The initial 13 samples of subcrop and in situ mineralization averaged 293 parts per billion gold and 0.53 per cent copper. Individual composite outcrop samples with malachite staining yielded up 60 parts per billion gold and 1.96 per cent copper over 1 metre; composite samples of the gossan zone hosted by pyritized and silicified volcanic breccia with some malachite staining analyzed up to 339 parts per billion gold and 0.87 per cent copper over 3 metres. The Yellow Bowl South gossan widens considerably to the west, above the cliff exposure that was sampled in 2007. The samples are generally from gossan zones and mainly comprise altered crystal tuff breccias that show various degrees of oxidization, sulphidization (pyrite with traces of sphalerite, galena and chalcopyrite) silicification (often blue-grey silica matrix), carbonatization (as replacement patches and microfracture fillings), chloritization as replacements and fracture fillings, with local hematization and well developed macro and micro sulphide matrix breccia. In 2009, a rock chip sample (429531) assayed 0.56 gram per tonne gold, 3.5 grams per tonne silver and 1.46 per cent copper (Assessment Report 31671).
In 1986, Noranda Exploration Limited staked the Toc 1-12 claims to cover showings in the Todd Creek area. The showing was discovered that year. From 1986 to 1988, Noranda completed reconnaissance exploration work, including geological mapping, prospecting and silt and soil geochemical surveys. In 1997, Island-Arc Resources Corp. optioned the property.
In 2017, stream sediment samples were collected by Millrock Resources Inc from streams in the vicinity of occurrence Yellow Bowl. Samples collected included W366 329 to 334 (235) and 241 to 244. Sample W366234 was located on a 3rd order stream at the foot of the By Glacier and yielded a gold value of 89 parts per billion which was reported to be in the 95th percentile for 1st and 2nd order stream sediment samples on the property (Assessment Report 37268, Map 2a(1), 2a(3)). This sample was collected a few hundred metres east from Yellow Bowl.
Refer to Todd Creek-South zone (104A 001) for a detailed work history of the Todd Creek property area showings.
