The Attic area is located in the west-northwest part of the Turnagain ultramafic complex about 3.5 kilometres northwest of the Horsetrail nickel deposit (104I 119).

The Turnagain ultramafic complex was intruded in the Lower Jurassic (and older) into Upper Paleozoic (?) and/or Triassic (?) metavolcanic and metasedimentary rocks of the Quesnel Terrane. It is in faulted contact on the east and north with slate and phyllite of the Paleozoic Road River Group (Ancestral North America). The magmatic evolution of the composite intrusion 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 (Nixon et al. (2018-2019)).

In 2018, two drill holes (DDH18-301 and DDH18-303) were completed on the platinum- and palladium-enriched Attic zone roughly 3.5 kilometres northwest of the Horsetrail zone. DDH18-301 was drilled a few tens of metres below a previously intersected platinum- and palladium enriched, structurally complex, suite of altered clinopyroxenites. The downhole interval of 238 metres to 260 metres yielded an average of 316 parts per billion palladium and 355 parts per billion platinum at a vertical depth of approximately 185 metres (News Release, Giga Metals Corp., Jan.30; 2019).

In 2013, Hard Creek Nickel Corp reported that it was investigating controls and speciation of platinum mineralization at their Turnagain ultramafic nickel-copper-cobalt project (Exploration in BC 2013, page 57). Studies were initiated with the BC Geological Survey to increase understanding and economic prospectivity of platinum group elements of the Attic zone. The Attic zone was interpreted as the roof of the ultramafic system and independent of the known resource area with its significant measured plus indicated resources and inferred resources (see Turnagain Nickel (104I 119).

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