The 4440 occurrence area is underlain by volcanic rocks of the Upper Triassic Stuhini Group.

The zone is located about 230 metres northeast of the northernmost drilling at the Spectrum Central Zone, just north of the old access drill road from the valley bottom and was discovered in 1990. The area is underlain by quartz-sericite-pyrite altered, biotite hornfelsed Stuhini volcanics, possibly on the west side, hangingwall, of a large feldspar porphyry body. Mineralization occurs in a narrow, incised creek gulley and is mostly covered by talus debris. Mineralization is hosted in a north-south trending, 80 degrees west-dipping, 10 to 40 centimetres wide shear, gougy fault zone that hosts semi-massive to massive arsenopyrite-quartz + sphalerite veining and vein fragments.

In 2016, mineralization was traced over a five-metre strike length. 2015, 2016 and historical prospecting grab samples yielded gold values ranging from less than 1.0 gram per tonne gold to 16.9 grams per tonne gold and 1.0 to 56.2 grams per tonne silver (as reported in Assessment Report 36675). Rock samples of quartz-sericite-pyrite altered volcanics that host the mineralization on the east and west side of the structure yielded less than 50 parts per billion gold. The showing is largely covered by overburden but 2015 soil sampling outlined a strong gold-arsenic in soil geochemical signature extending downslope and to the east from the occurrence suggesting additional parallel structures could be present. As of 2017, the 4440 zone was one of the few remaining showings near the Central Zone that had not received drill testing. 2015 chip sample (18241) over 1.5 metres assayed 0.95 gram per tonne gold, 0.06 per cent copper and 0.7 gram per tonne silver (Assessment Report 36675).