sentences:  The transition zone supergene sulfide phases include; violarite, smythite, covellite, chalcocite and marcasite after pyrite.The nickel sulfides within the regolith have been oxidised into a complex series of weathering fronts including a rare expression of a carbonate front which has resulted in a host of unusual nickel carbonate, arsenate and silicate minerals such as gaspeite, atacamite, annabergite, carrboydite, glaucospaerite, hydrohonessite, kambaldaite, népouite, nullaginite, pecoraite, olivenite, otwayite, reevesite, retgersite, takovite and of course widgiemoolthalite.The Miitel nickel mine was first discovered in the early to late 1970s by Union Miniere and Anaconda Resources, though due to poor understanding of the geology the initial intercepts were not sufficiently followed up until the early 1990s by Western Mining Corporation.