Granodiorite is a composite of mafic minerals feldspar, and Biotite, with a high degree of alteration

Granular texture; metamorphic rock fragments of the Biotite Schist consisting of quartz, feldspar and biotite. Biotite was partially altered to chlorite and iron oxides; opaque minerals were seen associated with biotite. Crystals (phenocrysts) partially altered to sericite or clay especially at the centre. Feldspar crystals of fractured quartz are visible. All these rock fragments and xenoliths are cemented by fine-grained of quartz.

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Rhyolite dyke-fine to medium-sized grains of quartz and feldspar

Equigranular and perthite texture is present. Quartz, perthite and orthoclase are the major minerals. Feldspars are altered to clay and biotite to sericite. Rare occurrences of altered muscovite. Opaque minerals as accessories occur as very fine aggregates.


Granite-fine to medium grains with highly crashed and withering composites of quartz and feldspar

Phenocrysts of zoned plagioclase are altered to kaolin. Cryptocrystalline silica dust is present as cemented material or as veins. Opaque minerals occur as accumulated aggregates.


Granite-fine to medium grains

The major textures are granular, consertal and poikilitic, consisting of quartz with anhedral crystals and the highly fractured forms constitute about 20%. In some places they occur as clots (fine?grained) between the coarse crystals. Biotite is altered to iron oxides.

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Simple Pegmatite dyke

The major textures include granular, consertal and poikilitic. It consists of quartz: it occurs as anhedral crystals and highly fractured crystals forming about 40%. Feldspar occurs as perthite and shows perthitic texture, is altered to clay forming more than 30%, while the plagioclase forms about 25%. It occurs as euhedral to subhedral prisms showing zoning and polysynthetic twinning. It is highly weathered and altered to clay and sericite. Biotite forms less than 3% and is highly weathered and altered to iron oxides. Iron oxides occur as veins due to a solution rich in Fe.

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Granite, fine grain size, composed of feldspar and quartz and secondary oxide minerals

Micrographic texture is evident. It consists of fine-grained quartz and orthoclase as the major minerals associated with each other. Plagioclase occurs as a minor mineral. Orthoclase and plagioclase are altered to kaolin and sericite. Biotite occurs in a low percentage, partially altered to chlorite. Iron oxides and calcite occur as secondary minerals filling the fractures and veins. The fractures show a dendritic texture. Phenocrysts of fractured quartz are present.


Granite, coarse grain size, feldspar, quartz and Biotite constitute the main mineral compositions

The major textures are intergranular, consertal and poikilitic. It consists of about 30% quartz with highly fractured anhedral crystals. Feldspar occurs as both perthite and plagioclase. Plagioclase occurs as euhedral to subhedral prisms showing polysynthetic twinning It has been highly weathered and altered to calcite, clay (kaolin) with sericite as the rim. Perthite occurs as coarse-grained and is perthitic in texture with Carlsbad twinning. Mica sheets (biotite and muscovite) form about 5% and are highly weathered and altered to chlorite and iron oxide like masses. Calcite and iron oxides occur as secondary minerals filling fractures and veins. Opaque minerals occur as accumulated aggregates or masses while zircon occurs as an inclusion in the mica sheet.