1): Bocabec Gabbro--greyish green, locally layered, medium-grained gabbro and minor associated granitic rocks; Utopia Granite--typically red, leucocratic, medium--to coarse-grained, equigranular, biotite granite; Welsford, Jake Lee Mountain, and Parks Brook granites--beige to pink, mediumgrained and equigranular to fine-grained and porphyritic, amphibole-bearing, peralkaline granites; Magaguadavic Granite--greyish pink, coarse-grained, megacrystic granite; John Lee Brook Granite--light grey, medium-grained, equigranular, garnetiferous
, two-mica granite; and Mount Douglas Granite--light pink, medium-to-coarse-grained and equigranular to fine-grained and porphyritic, rapakivitextured, biotite granite.
The formations include mainly garnetiferous
amphibolites and pelitic schist of Nellore schist belt, granitic gneiss and Cuddapahs (quartzites and shales) of Pre-cambrian period.
The highest values of the compression and sudar wave velocities were registered in the sample of banded garnetiferous
amphibolite (Hample h010, [V.
These rocks comprise mylonitic peridotite and sub-ophiolitic metamorphic rocks that range from garnetiferous
amphibolites facies to amphibolite facies to greenschist facies and un- metamorphosed sediments.
Tin mineralization is focused within a chloritic, garnetiferous
amphibolite unit within felsic mica schists.
biotite gneisses (khondalites) and the associated layered complex of garnetiferous
quartzo-felspathic granulites (leptynites) and non-garnetiferous
quartzo-felspathic granulites (alaskites) constitute an assemblage of metasediments injected by granitic materials, and recrystallised under deep-seated palingenetic conditions into a migmatite complex.
The newly exposed, less weathered garnetiferous
rock consists mostly of vuggy, coarsely crystalline, reddish brown to deep molasses-colored grossular-andradite interspersed with irregular areas of amphibole.
Country rocks include charnockite mafic and felsic granulite, garnetiferous
granulite, biotite gneiss, migmatite, mylonite and pegmatite.
Uranium mineralization is predominantly hosted within and spatially related to a grey-red-brown, crenulated garnetiferous
biotite schist unit with uranium mineralization occurring in the form of uraninite.
Many of these plutons, regardless of age, share characteristics such as the occurrence of pegmatite pods that locally contain tourmaline or beryl, garnetiferous
aplitic dykes, and inclusions or enclaves of paragneiss ranging in size from small xenoliths to large roof pendants.
Warsak and Shewa-Shahbazgarhi sheared garnetiferous
microporphyries and Ambela early phase peraluminous-metaluminous granites).
The northern one, called the Olovi block, consists of a monotonous sequence of muscovite, garnetiferous
and two-mica shists (Mlcoch et al.