Magmatic sulfide-rich nickel-copper deposits related to picrite and (or) tholeiitic basalt dike-sill complexes: A preliminary deposit model - Schulz, Klaus; Chandler, Val W.; Nicholson, Suzanne; Piatak, Nadine; Seal II, Robert R.; Woodruff, Laurel; Zientek, Michael (Open-File Report, 2010)