In that second case the melt produced was felsic and the more mafic low temperature i type granites have.
High temperature granite.
The main results can be summarized as.
Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.
While the high temperature i type granite magmas were produced by the partial melting of mafic source rocks their low temperature analogues resulted from the partial melting of quartzofeldspathic rocks such as older tonalites.
Heating at high temperature will make the tensile strength of granite change due to the loss of water and minerals and the effect of thermal stress that the most conspicuous effect is the expansion of quartz it is found that 300 c is the critical temperature for jalore granite above which the physicomechanical behavior reduces sharply.
High temperatures have a significant effect on initial and residual permeabilities of granite with increases of 3 4 orders of magnitude when temperature increases from 25 c to 750 c.
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If you use granite counters for outside kitchens that are exposed to heat in the summer and extreme cold during the winters there is a possibility of damage to the granite.
Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock.
Granite is one of the most heat tolerant counter top materials mainly because its natural formation depends on extraordinarily high temperatures combined with very high pressure.
1 the high temperature granite exposed to the cooling shock exhibited a rapid cooling rapid heating change during the first 5 min.
Extreme temperature changes can cause damage to granite under direct exposure.