IMHO, if the visual identification of the sulphide assemblage is correct, then the presence of pyrite suggests to me that it is most likely VMS style, not MMS style mineralization. They are typically characterized as follows:

VMS-pyrite, pyrrhotite, chalcopyrite, sphalerite

MMS-pyrrhotite, chalcopyrite, pentlandite

I hope that the pyrite was not identified correctly, but.....