silicate, sulfide, and platinum - group petrology and mineralogy of the kawene intrusion, quetico subprovince
abstract
the kawene intrusion is an ultramafic, layered, metamorphosed
cu- ni- pge- bearing intrusion located 29 km east of atikokan
within the quetico subprovince of northwestern ontario. the kawene
intrusion is emplaced primarily in metasedimentary turbiditic
wacke. the intrusion is composed of hornblende wehrlite in the
center, with hornblende clinopyroxenite, clinopyroxene
hornblendite, and hornblende melagabbro at the margin. the
intrusion has been metamorphosed to upper greenschist - to - lower
amphibolite metamorphic grade.
the mineralized area is composed of alternating layers of
hornblende clinopyroxenite and clinopyroxene hornblendite intruded
by tonalite veins, and sulfide veinlets. the sulfide veinlets and
the disseminated sulfides consist mainly of chalcopyrite,
pyrrhotite, and pentlandite. the other sulfides found in these
ultramafic rocks in decreasing order of abundance are ; galena,
violarite, and sphalerite. the platinum - group minerals (pgm) are
spatially associated with the sulfides.
collections
- retrospective theses [1604]