Major pegmatites discovered at the Grants and BP33 are composed of coarse spodumene, quartz, albite,
microcline, and mica.
The framework grains observed under polarizing microscope are monocrystalline and polycrystalline quartz, alkali feldspar, plagioclase,
microcline, biotite, chert, muscovite and number of lithic fragments from distinct origins.
It is observed that the black cotton soil predominant with montmorillonite, quartz and
microcline revealed new peaks pertaining to alunogen and bassanite due to contamination with sulfuric acid.
The density of the granite is 2620 kg/[m.sup.3], and the main components include
microcline (41%), plagioclase (27%), quartz (22%), and biotite (7%), among others.
2[H.sub.2]O) Quartz (Si[O.sub.2]) Formation material: Albite (NaAl[Si.sub.3] (i) Normally found in the [O.sub.8])
Microcline (KAl[Si.sub.3] sandstone or sand [O.sub.8]) Cristoballite (Si[O.sub.2]) Illite Clay minerals normally found ([K.sub..5][(AlFeMg).sub.3] with sandstone [(SiAl).sub.4][O.sub.10] [(OH).sub.2]) Ettringite ([Ca.sub.6] Cementing material [Al.sub.2][(S[O.sub.4]) .sub.3][(OH).sub.12]) Barite (BaS[O.sub.4]) Drilling mud Aluminum Oxide ([Al.sub.2] Normally from catalyst [O.sub.3]) Sulfur (S) Sodium Iron Oxide (NaFe[O.sub.2]) Table 2: The description of the sludge samples investigated in this study.
The material of rupture (chamotte) is formed mainly of quartz and amorphous phase, with small amounts of hematite,
microcline and anortithe (calcium feldspar).
Feldspars are mainly represented by
microcline and albite, followed by orthoclase and sanidine in some samples (Table 1).
SA-11-36 Schmidt et Silcrete outcrops with trace
Microcline and al.
The samples also contained a small amount of
microcline (9%), calcite (9%), and clinochlore (8%).
In its natural condition, the main ingredients of this sandstone include calcium feldspar (73%), kaolinite (11.60%), quartz (10.48%), and
microcline (4.50%); the physical and strength properties are provided in Table 1.
The low concentration of soluble [K.sub.2]O present in the phonolite may be due to the predominance of some constituent minerals such as:
microcline (KAI[Si.sub.3][O.sub.8]), orthoclase (KAI[Si.sub.3][O.sub.8]), andesine [(Na,Ca)[(Si,Al).sub.4][O.sub.8]] and e nepheline [(Na, K) AlSi[O.sub.4]] (Teixeira et al., 2012), where K is retained by covalent bonds in the crystalline network of the mineral, presenting low K release to the soil solution (Martins et al., 2008).
It is a white-yellowish fine-grained granite with quartz (forming heterogranular aggregates), feldspars (with plagioclase >
microcline) and muscovite, while biotite is absent (IGME, 1975).
