L09 Ch06 BinaryPhaseEqla

L09 Ch06 BinaryPhaseEqla - Proper Usage Most of the...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Proper Usage Most of the graphics in these slides, used to illustrate lectures in GEO 426P, are teaching aids provided by John Winter, the author of An Introduction to Igneous and Metamorphic Petrology , and modified by me to suit our purposes. You may download these slides to review on- screen, and may print out a single copy for study, but it would be inappropriate to further disseminate them or the images they contain.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Phase Equilibrium in One- and Two- Component Systems
Background image of page 2
Two-component (Binary) Systems Phase Equilibrium Melting / Crystallization of Natural Magmas One-component (Unary) Systems Complete solid solution Eutectic Peritectic Immiscible liquids
Background image of page 3

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

View Full DocumentRight Arrow Icon
Complete solid solution Two-component (Binary) Systems Phase Equilibrium Melting / Crystallization of Natural Magmas One-component (Unary) Systems Eutectic Peritectic Immiscible liquids
Background image of page 4
Makaopuhi Lava Lake Magma samples recovered from various depths beneath solid crust From Wright and Okamura, (1977) USGS Prof. Paper , 1004.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Thermocouple attached to sampler to determine temperature Makaopuhi Lava Lake From Wright and Okamura, (1977) USGS Prof. Paper , 1004.
Background image of page 6
Temperature of sample vs. percent glass 100 90 70 60 50 40 30 20 10 0 Percent Glass 900 950 1000 1050 1100 1150 1200 1250 Temperature ( ° C) 80 Makaopuhi Lava Lake Fig. 6-1. From Wright and Okamura, (1977) USGS Prof. Paper , 1004.
Background image of page 7

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

View Full DocumentRight Arrow Icon
Minerals that form during crystallization 1250 1200 1150 1100 1050 1000 950 0 0 0 0 10 10 20 10 10 20 30 40 30 50 40 50 Liquidus Melt Crust Solidus Olivine Clinopyroxene Plagioclase Opaque Temperature o C Olivine decreases below 1175 ° C ! Makaopuhi Lava Lake Fig. 6-2. From Wright and Okamura, (1977) USGS Prof. Paper , 1004.
Background image of page 8
Mineral composition during crystallization 100 90 80 70 60 50 .7 .8 .9 .9 .8 .7 .6 80 70 60 An Mg / (Mg + Fe) Weight % Glass Olivine Augite Plagioclase Mg / (Mg + Fe) Makaopuhi Lava Lake Fig. 6-3. From Wright and Okamura, (1977) USGS Prof. Paper , 1004.
Background image of page 9

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

View Full DocumentRight Arrow Icon
Crystallization Behavior: Generalizations 1. Crystallization spans a range of T (and P ). 2. Several minerals crystallize over this T range, more at lower T . 3. Minerals form sequentially, with overlap. 4. Minerals change composition as cooling progresses. 5. Melt composition changes during crystallization. 1. Minerals and sequence depend on: T , P Melt composition, including volatile content.
Background image of page 10
Complete solid solution Two-component (Binary) Systems Phase Equilibrium Melting / Crystallization of Natural Magmas One-component (Unary) Systems Eutectic Peritectic Immiscible liquids
Background image of page 11

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

View Full DocumentRight Arrow Icon
component systems Fig. 6-6. After Swamy and Saxena (1994), J. Geophys. Res., 99, 11,787-11,794. AGU
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/21/2010 for the course GEO 420k taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

Page1 / 61

L09 Ch06 BinaryPhaseEqla - Proper Usage Most of the...

This preview shows document pages 1 - 13. Sign up to view the full document.

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