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زمینشناسی و معدن::
کانی های سیلیکات
The Nature of Magma Magma is completely or partly molten rock, which when cooled solidifies to form igneous rocks composed mainly of silicate minerals.
The solid components (if any) in magma are crystals of silicate minerals.
When a magma body cools, the silicon and oxygen atoms link together first to form silicon-oxygen tetrahedra, the basic building blocks of the silicate minerals (see Figure 3.31, page 92).
Eventually all of the melt is transformed into a solid mass of interlocking silicate minerals that we call an igneous rock (Figure 4.2).
Igneous Compositions Igneous rocks are composed mainly of silicate minerals.
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