The Marc property is underlain by sandstone, siltstone and conglomerate of the Middle Jurassic to Lower Cretaceous Bowser Lake Group. These have been intruded by stocks of the Upper Cretaceous Bulkley Plutonic Suite. They range compositionally from diorite-quartz diorite to granodiorite and tonalite, and texturally they include both equigranular and porphyritic varieties. A contact metamorphic hornfels has developed for 300 metres or more around the intrusive. The sedimentary rocks are highly fractured and, locally, hydrothermally altered.

The Marc showing is hosted by argillites and siltstones. The occurrence is a 1 to 1.5 meter thick sulphide zone that trends 040 northeast and dips 30 to 40 degrees southeast. The rocks immediately adjacent to the mineralization have a strong fracture cleavage that strikes and dips parallel to the vein. The sulphide zone consists of two parts, a 0.5 to 0.75 metre thick hanging wall section comprising massive sulphides, and an underlying 0.75 metre thick section that is rotted, leached and heavily stained with iron and manganese oxides. Within this leached zone there are small remnant pods of massive sulphide that closely resemble the overlying zone. The upper massive sulphide zone comprises up to 20 per cent pyrite and variable quantities of dark sphalerite, galena, arsenopyrite, stibnite and possible jamesonite. The gangue minerals in and adjacent to the zone include quartz, feldspar (albite) and calcite-ankerite.

The Marc occurrence is believed to represent a feeder conduit which originally lay beneath a seafloor exhalite system. The related stratiform zone could lay upslope and west of the present Marc occurrence (Rey (2012), Assessment Report 33559).

A small sulfide occurrence called the Unnamed #1 occurrence is located approximately 75 meters north of the Marc occurrence. A long roadside outcrop exposes a horizon of black argillite which is in contact with a unit of grey dacitic ash tuff. Bedding in the argillite and layering in the tuff strikes north and dips 75 degrees west; the argillites also carry a slatey cleavage with a similar orientation. At the upper and western limit of this exposure there is a shallow-dipping, thin, sill-like body of hornblende porphyry diorite- andesite. At the contact between the argillite and tuff units there is a 2 to 3 centimetre thick zone that can be continuously traced along strike for 7 metres, although to the north there are discontinuous patches of rusty staining for a further 20 meters along the same trend. The zone contains pyrite and sphalerite. It is uncertain whether this occurrence represents a vein or syn-sedimentary mineralization. Values in gold and silver are related to the Marc type deposit.

A sample taken in 2008 yielded 67 grams per tonne silver, 2.49 grams per tonne gold, 1.04 per cent lead, 1.6 per cent arsenic and 0.47 per cent antimony (Assessment Report 30787). Values in copper and zinc from this sample were not anomalous.

Refer to Max (093M 027) for geological details and a common work history.