Some minerial terms ..From Samples.Ok heres what they mean when they SAY !!!!!!!!!..
__Chalcopyrite is an important ore of copper found in a wide range of hydrothermal environments.
__Pyrrhotite is a rather common trace constituent of igneous rocks. It occurs as segregation deposits from mafic igneous rocks associated with pentlandite, chalcopyrite and other sulfides
__Pentlandite is an iron-nickel sulfide Pentlandite is the most common terrestrial nickel sulfide mineral formed from immiscible sulfide-silicate melts under normal mantle and crustal conditions.
Occurances...Examples..
Pentlandite is found within the lower margins of mineralised ultramafic to mafic layered intrusions, the prime example being the Bushveld igneous complex, South Africa, the Voiseys Bay troctolite intrusive complex in Canada, the Duluth gabbro, in North America, and various other localities throughout the world. In these locations it forms an important nickel ore.
Pentlandite is also the principal ore mineral won from Kambalda type komatiitic nickel ore deposits, the type examples of which are in the Yilgarn Craton of Western Australia. Similar deposits exist at Nkomati, Namibia, in the Thompson Nickel Belt, Canada, and a few examples from Brazil.
Pentlandite, but primarily chalcopyrite and PGEs, are won from the supergiant Norilsk nickel deposit, in trans-Siberian Russia.
The Sudbury deposit in Ontario, Canada, is associated with a meteorite impact crater. Pentlandite-pyrite-pyrrhotite ore in this location was formed from an extensive melt sheet formed by melting of rock post impact, which became sulfur saturated and formed extensive sheetlike ore deposits.
In sulfur saturated melts, nickel behaves as a chalcophile element and partitions strongly into the sulfide phase. Because most nickel exists in ultramafic rocks and behaves as a compatible element in igneous differentiation processes, the formation of nickel-bearing sulfides is essentially restricted to sulfur saturated mafic and ultramafic melts.
The sulfide melt, being at or above 1000°C, is in the form of monosulfide solid solution (MSS), an amalgam of compositional "mineral" components of pentlandite, pyrite and pyrrhotite, and usually containing a small percentage of chalcopyrite (Cu being chalcophile), all of which are in an amorphous form..
OK clear as MUD RIGHT !!!!!!!!!!!!!!!!
READ READ !!!!!!!!!!!!!
https://en.wikipedia.org/wiki/Pentlandite