Regionally, the area is underlain by equigranular biotite- and hornblendebearing granitoids and leucocratic aplite dykes of inferred Early Cretaceous age, comprising the Nisling Range batholith. In general, the Nisling Range batholith varies from non-magnetic granitic compositions in the west to magnetic dioritic compositions further east. Porphyritic dykes are locally noted nearby cutting the Nisling Range granitoids; these dykes may be Cretaceous in age, or may correspond with nearby Early Tertiary intrusive ages documented by Murphy (2011).

The Nisling Range batholith intrudes Snowcap and Finlayson assemblage rocks of the Yukon Tanana terrane (YTT). In the area, the Snowcap assemblage is dominated by siliceous meta-clastic rocks (quartz-biotite and quartz-muscovite schists). Subordinate marble and carbonaceous meta-clastic rocks likely correlate with the Finlayson assemblage.

Geological mapping in 2012 outlined gold mineralization in soil coinciding with the southern contact between biotite-hornblende diorite and a bleached breccia unit. Prospecting over an area of approximately 480m x 400m returned anomalous gold values to a high of 0.58 g/t with 8 samples in this area returning an average of 0.34 g/t Au.

Diamond drilling in 2013 has confirmed the presence of a mineralized magmatic-hydrothermal system that is hosted in diorite and porphyry dykes coincident with the contact between the diorite and silicified, hydrothermal breccia. Along this contact, drill holes WLF-13-001 and WLF-13-003 returned gold intercepts of 100.2m @ 0.25 g/t Au (including 6.1m @ 0.8 g/t Au) and 44m @ 0.68g/t Au, respectively. Plagioclase porphyry dykes intersected in both WLF-13-001 and WLF-13-003 resulted in gold values up to 1.1 g/t and 1.9 g/t Au respectively. Anomalous copper and molybdenum mineralization and assay results correspond with gold intersections. Gold mineralization is preferentially associated with pervasively chlorite-altered green diorite and porphyry dykes, in which pyrite, chalcopyrite and molybdenite mineralization is disseminated and hosted by quartz ± chlorite veinlets and stockwork.

(AR 096662), (AR 96330)