The Ursula occurrences are located along a ridge that separates the south western head waters of the Mamquam River and south eastern head waters of Raffuse Creek, at elevations of approximately 1290 to 1320 metres.

The area is underlain by a roof pendant of rhyolitic and andesitic tuff and agglomerate of the Lower Cretaceous Gambier Group. The volcanic rocks overlie Late Jurassic leucocratic granodiorite of the Jurassic to Tertiary Coast Plutonic Complex. The elongate, keel shaped, roof pendant trends west-northwest for 2 kilometres and is up to 1 kilometre wide.

Locally, a fractured and sheared quartz diorite and/or rhyolite hosts pyrite and chalcopyrite mineralization. In 1982, rock samples (No. 191 and 192) assayed 0.640 and 0.765 per cent copper and 3.8 and 2.1 grams per tonne silver, respectively (Assessment Report 10601).

Another zone of mineralization, located approximately 350 metres to the northwest, consists of pyroclastic rock composed mainly of quartz hosting disseminated pyrite and sphalerite with veinlets of quartz. In 1981, a rock sample (No. 153) assayed 0.97 per cent zinc (Assessment Report 09714). The following year, a rock sample (E264) of silicified rhyolite with disseminated pyrite and minor galena-sphalerite mineralization, from the same area, assayed 0.55 per cent zinc and 0.23 per cent lead (Assessment Report 11052).

Approximately 200 metres east of the previous zone, an altered rhyodacite hosts pyrite, sphalerite and chalcopyrite mineralization. In 1981, a rock sample (No.175) assayed 0.207 per cent zinc (Assessment Report 10601).

During 1980 through 1982, Alpen Exploration completed programs of rock, soil and silt sampling, prospecting and a ground magnetometer survey on the area as the Ursula, Diddi and Sarah claims. During 2005 through 2015, the area was prospected and sampled as the Mamquam 1-5 claims.