http://crcleme.org.au/Pubs/OPEN%20FILE%20REPORTS/OFR%20116/OFR%20116%20GSWA%20Record%202007-9.pdf
"Platinum-group mineral and chromite mineralization
have been reported from several areas in the survey area,
including the Yornup area in the southwest (Cornelius
et al., 1987) and the Yarawindah Brook area near New
Norcia (Cornelius et al., 1987; Harrison, 1984), the latter
in the Jimperding metamorphic belt. In the northwest
part of the Yilgarn Craton, platinoid and chromite
mineralization has been reported (Flint et al., 2000) in
greenstones of the Weld Range greenstone belt (part
of the Luke Creek Group). Flint et al. (2000) drew
comparisons between the geology of the Narndee and
Windimurra intrusions and that of the Bushveld and
Stillwater Complexes, and suggested PGE potential. Both
the Narndee and Windimurra intrusions have potential for
nickel and cobalt mineralization."
Nickel
"In Archean bedrock, Ni is concentrated in ultramafi c rocks.
Accordingly, Ni abundances are greater in greenstone belts
(90th percentile 303 ppm) than in felsic-dominated terrains
(90th percentile 55 ppm).
Outside known greenstone belts (Fig. 13), there is
a Ni concentration in the Jimperding metamorphic belt
south of Wongan Hills, with a maximum of 270 ppm Ni in
sample 103191. Greater Ni (and Cr) abundances confi rm
the presence of mafi c and ultramafi c rocks within the
Jimperding metamorphic belt, such as the Coates **bro.
Some isolated high-Ni abundances throughout the western
Yilgarn Craton, both within and beyond known greenstone
belts, might be due to secondary enrichment of Ni, but
could also indicate small ultramafi c remnants. A peak
Ni abundance of 2150 ppm (sample 101655) is related
to a mafi c–ultramafi c complex south of the Windimurra
Complex.
Copper
On a regional scale, Cu abundances are significantly
greater in greenstone belts (90th percentile 180 ppm) than
in granite–gneiss terrains (90th percentile 38 ppm), with
a few noticeable exceptions. Regional concentrations of
high Cu in the southwest of the craton (Fig. 14), along
strike from the Saddleback greenstone belt, extend from
approximately 20 km south of the Saddleback greenstone
belt to the southern edge of the craton, a distance of
approximately 120 km. A series of high-Cu concentrations,
south of the Wongan Hills greenstone belt in the
Jimperding metamorphic belt, trend approximately 300 km
northwest and extend approximately 300 km towards
Mullewa. This trend might refl ect abundant mafi c rocks in
this part of the metamorphic belt, with a small amount of
associated base metal sulfi de
