Can Granite Contain The Mineral Olivine

Still more mafic a mineral is olivine.

Can granite contain the mineral olivine.

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. The white grains are coral fragments and the gray black grains are pieces of basalt. Green olivine sand from papakolea beach hawaii. If you think the grains have a gemmy appearance olivine is the mineral name of a gemstone known as peridot the width of this view is about 10 millimeters.

Peridotite is mainly olivine peridot and. Granite is mostly quartz feldspar and mica. A fine grained igneous rock contains 11 plagioclase 72 pyroxene 15 olivine and 2 amphibole. Olivine is typically with pyroxenes in basalt for example and quartz k feldspar with micas biotite and muscovite is a typical composition of granite.

The granite of pikes peak in colorado is an example of such a fayalite granite. Basalt is mainly feldspar pyroxine and amphibole. The dark colored silicates contain iron and magnesium and include minerals such as olivine and pyroxene. Olivine does not naturally occur with the mineral quartz.

But there are no such rock types that are composed of olivine plus quartz. Strictly speaking granite is an. This rock would most likely be classified as answer choices. Normally olivine and quartz never appear together but in exceptionally sodium rich granite the iron bearing variety of olivine fayalite is compatible.

The light colored silicates include quartz and feldspar which are the main constituents of granite and are used by the ceramic industry in both clays and glazes. Quartz can only form from magmas that are relative rich in silica while the olivine minerals only form from magmas that are relatively lean in silica so quartz and olivine are incompatible minerals.