Several NE low-magnetic structures that crosscut the magnetic tonalitic
sill were targeted as possible drill targets and its fold nose.
The oldest basement forming lithologies are mafic to tonalitic
rocks metamorphosed under epidote amphibolite- and greenschist facies conditions.
Orthogneisses are of granitic, granodioritic, quartzdioritic, and tonalitic
Partitioning of high field-strength and rare-earth elements between amphibole and quartz-dioritic to tonalitic
melts: an experimental study.
(1990) the high-grade metamorphic rocks in both the Chuggin Road and Lime Hill units include biotite, bioitite-cordierite, and sillimanite-bearing paragneiss, migmatitic paragneiss, marble, quartzite, amphibolite, and tonalitic
Several granitic, granodioritic, tonalitic
, dioritic and syenitic intrusions close to the quartz veins and minor gold field soils were observed (Figures 12 and 13).
1996): (i) Archean and Neoproterozoic calcic to calco-alkaline, plutonic orthogneisses, varying in composition from tonalitic
to granitic; and (ii) Neoproterozoic metavolcanic-metasedimentary sequences made of metavolcanic rocks ranging in composition from low-K metatholeiites to metarhyolites.
The TTG unit is made up of three rocks types: the tonalitic
suite (known as So'o granite), the charnockitic suite and the granodioritic suite massifs (Shang et al, 2004)
This rock unit is characterised by grey foliated Biotite acid/Biotite Hornblende quartz feldspathic gneiss of tonalitic
to granodioritic composition ;Mafic to ultramafic component which outcrops as discontinuous boudinaged lenses or concordant sheet of amplibolites with minor amount of biotite-rich ultramafite; and Felsic component, a varied group comprised of pegmatite, aplite quartz-oligoclase veins, fine-grained granite gneiss, and porphyritic granite.
The N- to NW-oriented aeromagnetic trends are superimposed on a background of magnetic lows corresponding to older supracrustal and tonalitic