GEOL 104 Study Guide - Midterm Guide: Overburden Pressure, Igneous Differentiation

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 104
• Professor: Daniel Layton- Matthews

Document Summary

Pressure increases with depth, melting occurs at higher temperatures at depth due to higher confining pressure, when confining pressure drop, decompression melting occurs. Temperature increases with depth, mantle that quickly rises does not lose heat quickly. Solids, if any, are minerals that have already crystallized from the melt. Volatiles (gases dissolved in the melt) include water vapor (h2o), carbon dioxide (co2), and sulphur dioxide (so2) Queen"s b. a. , 1907 queen"s b. sc. , 1909 mit ph. d, 1912. As magma cools, minerals crystalize in a systematic fashion based on their melting points, during crystallization the composition of the liquid portion of magma continually changes. Due to removal of elements by earlier forming minerals, silica component of the melt enriches as magma evolves. Magmatic differentiation- formation of one ore more secondary magmas from a single parent magma, during crystallization solid and liquid components can separate, magmatic differentiation and component separation at various stages produces different types of igneous rocks.