The DB showing is located just west of the Turnagain River about 70 kilometres east of Dease Lake.

The DB showing area is underlain by the Early Jurassic (and earlier(?)) Turnagain ultramafic suite which measures 8 by 3.5 kilometres and is elongate in a northwest direction and is conformable with the regional structural grain. The ultramafic body is in fault contact with early Paleozoic graphitic phyllites and lesser calcsilicate and quartz-rich tuff layers along its northern and eastern margins. Diamond drilling suggests that the poorly exposed southwestern margin of the intrusion is in intrusive contact with metasedimentary, volcaniclastic and carbonate rocks of Early Jurassic age and possibly earlier. The magmatic evolution of the composite intrusion evidently extended over at least four million years in the Early Jurassic (ca. 189-185 Ma). This span of intrusive activity is a minimum as the oldest Stage 1 component of the Turnagain complex has yet to be dated.

The Turnagain ultramafic suite broadly consists of a central dunite core with peripheral units of wehrlite (olivine + clinopyroxene-rich peridotite), olivine clinopyroxenite, clinopyroxenite and hornblendite, all of which represent crystal cumulate sequences.

In 2005, drillhole 05-88 located 3.5 kilometres northwest of the main Horsetrail zone (104I 119) tested an isolated airborne EM conductor coincident with a platinum-palladium soil anomaly. Pyroxene-rich core, locally containing up to 15 per cent pyrrhotite, was the dominant lithology intersected. The hole intersected several narrow intervals of 0.25 to 0.60 gram per tonne combined platinum plus palladium before ending in an 18.9 metre interval averaging 0.86 gram per tonne combined platinum plus palladium (Press Release - Hard Creek Nickel Corporation, September 26, 2005). Individual two-metre-long sample intervals analyzed up to 1.58 grams per tonne combined platinum plus palladium and 0.35 per cent copper.

In 2006, 4 holes drilled within the DB and Bench areas intersected magnetite-rich pegmatites carrying sulphides and low-grade platinum and palladium mineralization. DB hole 06-161 contained the highest platinum and palladium intersection and yielded 36.5 metres of 0.59 gram per tonne platinum and palladium (Press Release, Hard Creek Nickel Corp., December 21, 2006). This interval, along with anomalous values intercepted in Bench hole 06-102X, indicate a prospective, minimum strike length of 1.1 kilometres for the platinum and palladium-bearing horizon. In the DB area, the prospective zone is open northwest of the 49.8-metre-long intersection of 0.96 gram per tonne platinum and palladium, including a 0.5-metre interval of 4.88 grams per tonne platinum and palladium previously reported in hole 05-88.

In 2011, Hard Creek Nickel completed a 75.5 line-kilometre ground magnetic survey over the DJ-DB area, centred 2.5 kilometres northwest of the Horsetrail deposit. With magnetic readings every 25 metres on 50 metre spaced lines, the survey provided detailed information on distribution of buried lithology and intrusive contacts.

See Turnagain Nickel (Horsetrail) (104I 119) for further details of the Turnagain property, including geology, work history and bibliography.