Is felsic magma silica rich? Magmas rich in felsic components such as quartz and orthoclase feldspar are higher in silica than those rich in igneous rocks. Magmas with a high silica content are ...

Felsic samples from the southern Nain Province have Vp between 6.2-6.7 km/s, and Vs between 3.5-3.7 km/s, while mafic samples have Vp between 6.7-7.0 km/s and Vs between 3.7-4.0 km/s. Anisotropic ...

The rocks at the surface of the modern Earth are broadly divided into two types: felsic and mafic. Felsic rocks are generally relatively low density — for a rock — and light in colour because ...

Major element compositions of glass inclusions in olivine and plagioclase phenocrysts from representative Mariana arc lavas show that mafic Mariana arc liquids are tholeiitic and not high‐alumina, ...

Abstract Mafic enclaves from three plutons in the Chilliwack batholith have been compared with contemporaneous mafic stocks in order to determine (1) the processes by which mafic and felsic magmas ...