The Ursus 4 occurrence, consisting of several samples with anomalous silver and copper, is located 5.75 kilometres east of Harmon Peak and 4.5 kilometres northeast of Midas Lake about 246 kilometres northwest of the community of Germansen Landing.

The showing is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins.

Devonian-Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Stuhini Group andesite flows and pyroclastic rocks. Stuhini volcanics have been intruded by the granodiorite to quartz monzonite Black Lake Suite of Early Jurassic age and are in turn unconformably overlain by or faulted against Lower-Middle Jurassic calcalkaline volcanics of the Toodoggone Formation (Hazelton Group).

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

The Ursus 4 showing is underlain by undivided volcanics of the Hazelton Group. Roughly one kilometre to the south, undivided Hazelton Group volcanics are separated from volcanics of the Stuhini Group by a major east-striking fault. The Stuhini Group at this location are composed of limy sediments, laminated tuffaceous mudstones, tuffs, cherts and rhyolites. To the east of the Ursus showing on the west side of Midas Creek, a biotite granodiorite stock of the Early Jurassic Black Lake Suite intrudes this volcanic sequence.

In 1987, a total of 49 rock samples were collected during property exploration. Several of these from the Hazelton volcanics yielded anomalous silver and copper. The best two of these assayed as follows: sample 18388 yielded 106.0 grams per tonne silver and 2.11 per cent copper; and sample 18397, taken 500 metres to the northwest, yielded 36.0 grams per tonne silver and 1.29 per cent copper (Assessment Report 18026).

In 1985, a soil geochemical survey was carried out on the Lake I-1V, Oro I and II and URSUS I-IV claims by the Toodoggone Syndicate. Only the Lake II and IV had work done on them. Soil sampling and prospecting resulted in the collection of 188 soils, 8 silts and 29 rock samples.

Exploratory work in 1988 consisted of rock soil and stream sampling in selected areas of the properties. A total of 100 rock and 473 soil samples were collected by Beachview Resources on the Heckle, Jeckle, Jerry, Lac Noir, Met II, Ursus I-IV and Oro I-II claims; the claims are not all contiguous.

In 2006, A. Birkeland collected several samples on his Peak, Midas and JL claims which covered the Lake 2 showing (094E 178) located 3.6 kilometres south, and Ursus 4 showing area; however, most of the sampling occurred well to the east of the Lake 2 showing and about 1 kilometre east and south of the Ursus 4 showing.

Refer to Lake 2 (094E 178) for related details.