Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Molten felsic magma and lava is more viscous than molten mafic magma and lava.

In a widely accepted silica-content classification scheme, rocks with more than 65 percent silica are called felsic; those with between 55 and 65 percent silica are intermediate; those with between 45 and 55 percent silica are mafic; and those with less than 45 percent are ultramafic.

2023年12月10日 · Felsic rocks are silica-rich rocks high in minerals like quartz, feldspars, or muscovite and relatively low iron and magnesium minerals. Usually, rocks classified as felsic have at least 75% felsic minerals.

2023年12月12日 · What are felsic and mafic minerals? Felsic minerals are light-colored rock-forming silicates. They have mostly light-colored elements like potassium, silicon, sodium, and oxygen. Examples are alkali and plagioclase feldspars, quartz, feldspathoids, and corundum. Others are silica forms like tridymite and cristobalite.

Igneous rocks can be divided into four categories based on their chemical composition: felsic, intermediate, mafic, and ultramafic. The diagram of Bowen’s reaction series (Figure 4.6) shows that differences in chemical composition correspond to differences in the types of minerals within an igneous rock.

Felsic: Derived from "feldspar" and "silica," felsic rocks are rich in silica and aluminum. They contain a higher proportion of light-colored minerals like quartz, feldspar (both plagioclase and orthoclase), and muscovite. Felsic rocks are typically light in color, such as white, pink, or gray.

2025年1月25日 · The major mineralogical components of igneous rocks can be divided into two groups: felsic (from feldspar and silica) and mafic (from magnesium and ferrous iron). The felsic minerals include quartz, tridymite, cristobalite, feldspars (plagioclase and alkali feldspar), feldspathoids (nepheline and leucite), muscovite, and corundum.

Igneous rocks can be classified based on their chemical and mineral composition into four primary categories: ultramafic, mafic, intermediate, and felsic. Here’s a detailed overview of each category including their composition, characteristics, examples, and formation processes.

2023年11月21日 · Felsic minerals include quartz, feldspar, orthoclase, and plagioclase. What type of rocks are felsic? Felsic rocks are the most common igneous rocks within Earth's continental crust....

Quartz, muscovite mica, and orthoclase feldspars are common felsic minerals. Granite, the refined result of the earth's internal separation process, is the most common felsic rock. Felsic and mafic rocks are igneous rocks classified according to their silica content.