The second phase of injection time is close to the main phase and is represented by medium- and fine-grained leucocratic
granites with rare potassium feldspar phenocrysts.
The clinopyroxene-bearing albitite is a leucocratic
granoblastic, fine- to medium-grained rock, dominated by albite ([Ab.sub.94-96]) and quartz, with minor amounts of clinopyroxene ([En.sub.30-36] [Fs.sub.12-23]; Na = 0.12-0.15 a.p.f.u.; Mg# = 0.57-0.75); (Figure 4(f)).
, medium-grained rock suspected to be nephelinite was also encountered around Uganga hill.
The granite is leucocratic
, shows colour variation and at places is a mixture of yellow, brown and black.
These minerals were collected from miarolitic pegmatites, hydrothermal veins and greisens associated with the upper portions and first-crystallized parts of the peraluminous Mount Antero Granite, especially within the leucocratic
variant of the granite.
The granites in this area are leucocratic
in appearance and vary in color and mineralogical composition.
Anil points out that "Webster's 2nd defines pilandite as 'a leucocratic
porphyry with phenocrysts, a groundmass of anorthoclase, and a little amphibole" and adds "Well at least I know what 'a', 'with', 'of', 'and', and 'little' mean." I checked the definition and it concludes with "Cf.
The main rock types in this borehole are biotite gneisses and sillimanite-biotite gneisses to metatexites (stromatitic migmatites) with relatively rare intercalations of diatexites (leucocratic
Also of great interest are newly discovered jadeite deposits in the Polar Urals (Levy Kechpel, etc.), represented by veins in the leucocratic
The Karunjhar Hill granite is gray, partly fresh and leucocratic
, coarse grained.