The 320 area is underlain by hornfelsed clastic sediments of the Middle Jurassic to Upper Cretaceous Bowser Lake Group which are intruded by dikes of quartz biotite feldspar porphyry immediately east of the Mount Thoen stock of the Late Cretaceous Bulkley Plutonic Suite. Intrusive composition has been described as quartz diorite, quartz monzonite and granodiorite.

In 2011, Xander Resources discovered a new zone and named it the 320 zone. Within the massive, fresh monzonitic rock between shear zones, a zone of molybdenum mineralized fractures was discovered. These parallel fractures strike about 320 degrees with moderate dips to the northeast. The hairline to centimetre-wide veins contain massive molybdenum with disseminated molybdenum found within the monzonite hangingwall and footwall. The 320 Zone can be followed about 100 metres along strike and is about 50 metres wide at its widest point. The 320 zone is not amenable to chip sampling without a rock saw, due to the smoothed surface of the massive intrusion where it has been weathered by ice action. Grab samples were taken from two of the veins that included vein, hangingwall and footwall material. Sample TN-HOT11-004 assayed 0.375 per cent molybdenum and sample TNHOT11-007 assayed 0.17 per cent molybdenum (Assessment Report 32996). The spacing of these veins ranges from 20 centimetres to several metres and the mineralization appears limited to within 10 centimetres of the veins, and therefore these results are not representative of the area as a whole.

Refer to Hot (093M 124) for details of the Hot Property work history which includes the 320 zone.