Preliminary mapping of the trench exposures shows that the massive sulphides (chalcopyrite dominant) are hosted within structurally controlled fault-breccias that occur within a sequence of metasedimentary rocks and a white, medium-grained
monzonite granite.
The trend is defined geologically by a zone of structural disruption, pervasive quartz-sericite-pyrite (QSP) alteration and local potassic alteration that follows an elongate intrusion of Lower Jurassic monzodiorite and
monzonite. This trend includes several known gold-silver vein and copper-gold porphyry occurrences including Castle, Castle Central, Castle East, A9 and Tuk on Colorado's Castle Property and Saddle South and Saddle North on GT Gold's Tatogga Property1.
It has been recognised that previous drilling was proximal to this zone of mineralisation and previously reported higher grades were associated with intrusive
monzonite stocks supporting this association.
By modifying magnetic susceptibility values, a reasonable overlap of calculated and observed magnetic fields was achieved for physical properties that resemble those of the Taadikvere quartz
monzonite, Abja quartz monzodiorite and Sigula gabbro-diabase intrusions (models 6, 8 and 9 in Table 1 and Fig.
Saw sampling over the area outlined quartz
monzonite rocks with pyrite and oxidized pyrite being the dominant sulphide mineral along with minor Chalcopyrite, Chalcosine, Molybdenite and Malachite (Oxide).
The granite is a porphyritic
monzonite with an average unit weight of about 2.69 g/[cm.sup.3].
These structures are present in the Barit
monzonite pluton near the contact with Rakaposhi volcanics.
The Dusi (Garba Tula) sapphire deposit, central Kenya--A unique Pan-African corundum-bearing
monzonite. Journal of African Earth Sciences, 38(4), 401-410, http://dx.doi.
The volcanic strata mainly consist of basalt, trachybasalt, andesite, and basaltic andesite that are intruded by
monzonite, monzodiorite, granodiorite, and syenite.
Meantime gd intrusive bodies with Hornblende granodiorite to
monzonite permeated between meta-gabbro and limestone.