EVSC 2800 Study Guide - Midterm Guide: Aluminosilicate, Albite, Anorthite

• School: University of Virginia
• Department: Environmental Sciences
• Course: EVSC 2800
• Professor: Herman Janet

Document Summary

Bowen"s reaction series: the order of crystallization of the common silicate minerals from a magma. It is the general model for the evolution of magmas and minerals during the cooling process. Mafic minerals discontinuous reaction series: from early, high temperature (around 1000 degrees c) crystallization to late, low temperature (around 600 degrees c) crystallization: Olivine, pyroxene, amphibole, biotite mica, orthoclase feldspar, muscovite mica, quartz. Felsic minerals discontinuous reaction series: from early, high temperature (around 1000 degrees c) crystallization to late, low temperature (around 600 degrees c) crystallization: Calcium rich (sodium poor) plagioclase feldspar, sodium rich (calcium poor) plagioclase feldspar, orthoclase feldspar, muscovite mica, quartz. Al:si rations and type of substituting groups example: the feldspar group. Geology exam one study guide: individual mineral names within the feldspar group refer to definite chemical composition and crystalline structure example: albite (na-rich) and anorthite (ca-rich) are plagioclase feldspars. orthoclase, microcline, and sanadine are k-feldspars.