Ternary Diagram Igneous Rocks. Igneous rocks are those that form via the process of melting and cooling. In plutonic rocks all of the minerals are crystallized into visible grains.
If they erupt from volcanoes onto the surface as lava they are called extrusive rocks by contrast intrusive rocks are formed from magma that cools underground. In plutonic rocks all of the minerals are crystallized into visible grains. The acronym qapf stands for quartz alkali feldspar plagioclase feldspathoid foid.
First yes you can plot mafic and ultramafic rock classifications starting with version 2 2 6.
Basic igneous rocks like basalts and gabbros will plot in the field of basic rocks and siliceous limestones and dolomites will plot in the field of calcareous rocks. The qap ternary diagram is used to classify igneous rocks with visible mineral grains phaneritic texture from their feldspar and quartz content. Each of the three corners represents a particular component mineral for example a quartz b plagioclase feldspar and c potassium feldspar. If the intrusive rock cooled underground but near the surface it is called subvolcanic or hypabyssal and often has visible but tiny mineral grains.
