1.30 - Growth of silicate minerals-look up defnition of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Minerals and crystals -naturally occurring compound -Si-O example -SiO2=electrical neutrality =mineral QUARTZ -fixed composition -shape -external -internal Mineral Families (environment) -Families are defined by anions -silicate, carbonate, sulfide, oxides, fluoride families -catioins/anions -the two most common elements are oxygen and silicon Fundamental Structure of Silicate Minerals -Si+4Ov42-=(SiOv4)4- -tetrahedron -3d oxygen (4) with silicon in the middle Result is 1-arrangement of atoms in a geometry that best conserves energy i.e.-internal structure=space lattice varies -silicate minerals are classified with respect to structure and composition Mineral Families Silicate minerals Concept of magma
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Growth of silicate minerals-look up defnition of magma-if water enters solid, it melts-pressure-temperature-water-molten rock on cooling forms silicate minerals in a specific order-BOWEN REACTION SERIES**VERY IMPORTANT-1300 degrees magma ten cools slowly-1 st mineral formed is magnesium silicate (Olivine)-high temp stable mineral disappears to form-then Pyroxene disappears to form-then drop temp more and Amphibole to form-then Biotite-DISCONTINUOUSj-CONTINUOUS-when temp drops, goes from Ca and is replaced with Na(mineral is still there, but is just being exchanged)-stable minerals at botton of reaction series=alkali feldspar, muscovite, quartz...
View Full Document

Page1 / 2

1.30 - Growth of silicate minerals-look up defnition of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online