The McK 6 occurrence lies 3.3 kilometres north of the Granduc ore deposit (104B 021), south of the South Leduc Glacier. The occurrence is located near the east boundary of the 120-metre-wide, north-trending South Unuk cataclasite zone (Lower Jurassic). The area is underlain by north striking and steeply west dipping volcanics and sediments of the Lower Jurassic Unuk River Formation (Hazelton Group). Andesites and porphyritic andesites lie to the east and siltstones, tuffs and limestones lie to the west. West of the volcanic-sediment contact the rocks are metamorphosed to chlorite schist, biotite schist, impure sheared limestone, limey argillite and chert. All rocks are cut by Triassic to Jurassic diorite plutons and dikes of the John Peaks Stocks.

Mineralization consists pyrite and sphalerite within narrow quartz veins within the andesite. Considerable quartz float, with pyrite, chalcopyrite and galena, lies 500 or more metres to the west. In 2006, Bell Resources Corp. traced float from this area (possibly the same float) uphill towards the icefields on Granduc Mountain resulting in the discovery of a pyrite-magnetite calcareous breccia showing - the JK. This showing was channel-sampled and a site located for a diamond drill platform to test for stratiform mineralization at depth.

See JK (new MINFILE in 2018) for further details of relevant nearby drilling and geology. JK mineraliztion shows the continuity of magnetite-pyrrhotite-chalcopyrite mineralization across a four-kilometre strike length, includes MCK6 and other Granduc-type zones, the extent of which puts them in the top percentiles of Besshi-style VMS deposits.