Wellgreen Project Preliminary Economic Assessment ... - OTCIQ.com

8.0 DEPOSIT TYPES
The Wellgreen deposit is hosted in the Quill Creek Complex, one of a number of
mafic-ultramafic sills that are enriched in nickel-copper-PGE mineralization that
outcrop within the Kluane Ultramafic Belt of the Wrangellia Terrane in southwestern
Yukon. The sills which form the Kluane mafic-ultramafic complex are thought to be
part of a sub-volcanic system that feed the Nikolai Formation flood basalts and have
been compared to the Noril’sk in Russia.
At Noril’sk, the ultramafic complex intruded a bed of gypsum/anhydrite and followed
this bed for several kilometres. Upon encountering this bed, massive copper, nickel,
and PGM sulphides accumulated along the footwall due to sulphur contamination.
The sulphides became semi-massive several kilometres along the direction of flow
and further along they became disseminated and then depleted. At this point the
intrusion became depleted of copper and nickel and had become a feldspathic
pyroxenite (McGoran 2008).
Salient characteristics of the Wellgreen deposit model can be classified as: gabbroidassociated
nickel, copper, PGEs, subtype 12.2.a: layered intrusive, nickel-copper as
summarized in Table 8.1 (Eckstrand 1984).
Table 8.1 Gabbro-associated Nickel Deposit
Gabbroid-associated Nickel, Copper, PGEs subtype 12.2.A: Layered Intrusive
Commodities Nickel, copper, PGEs (cobalt, gold, silver, sulphur, iron).
Examples Sudbury Deposits; Great Lakes Nickel; Ont-Duluth Complex,
Minnesota; Stillwater Complex, Montana; Brady Glacier, Alaska;
Noril'sk-Talnakh, Russia; Pikwe and Selebi Deposits, Botswana.
Importance Canada: the Sudbury deposits have, by a considerable margin,
produced more nickel than any other district in the world, as well as
substantial copper, precious metals and other by-products.
World: this deposits estimated to account for about 80% of the world’s
reserve of sulphide nickel and about half of current world production of
PGEs.
Typical Grade, Tonnage The amount of mineralized material contained in the individual bodies
may range from a few hundred thousand tonnes to tens of millions of
tonnes, and each intrusive complex generally contains a number of
mineralized bodies. Grades generally range from about 0.6 to 1.6%
nickel, 0.2 to 1.3% copper but large, lower grade deposits are known
(e.g. Great Lakes Nickel, 0.20% nickel, 0.36% copper). Combined
PGEs content (palladium and platinum mainly) is generally in the order
of 1 g/t, but Stillwater, Merensky Reef and Talnakh deposits contain
PGEs ranging from 10 to 20 g/t.
table continues…
Prophecy Platinum Corp. 8-1 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada