Abstract
Four of the major rock types of the Sutherland
Greenstone Belt namely the ultramafic, mafic and granitic
rocks as well as the banded iron formation were examined
petrographically and geochemically. Special attention
was given to the regional distribution of gold in these
rock types.
The ultramafic rocks have regionally a simple mineralogy
consisting of actinolite, clinochlore and anthophyllite.
Relict olivine crystals were found in some
bore-cores. The mafic rocks have regionally a typical
amphibolite-facies mineralogy consisting of hornblende,
quartz and plagioclase (An
or greater). Both_oxidefacics
and silicate-facies banded iron formation were
identified. The silicate-facies BIF have grunerite,
quartz and ore minerals typically. A garnet-rich banded
iron formation was identified w ith considerable amounts
of relict garnet crystals and biotite with grunerite,
quartz and ore minerals in the mineral association...
M.Sc. (Geology)