... FM Diagram for Metapelites Most pelitic rocks can be described by the system K2O-Al2O3-FeO-MgO-SiO2-H2O Quartz ... K2O - CaO; K = K2O F = FeO + MgO + MnO Mineral ...
Need to exist over narrow P-T range. The Phase Rule in Metamorphic Systems ... At the isograd. Above the isograd. Below the isograd. Bulk rock composition ...
Chapter 26: Metamorphic Reactions If we treat isograds as reactions, we can: Understand what physical variables might affect the location of a particular isograd
mixed volatile reactions: examples (W ch 26) range of reaction curves. possible depending on ... be exchanged in chemical reactions. H - enthalpy, heat content ...
A hypothetical column of rock proposed by J. B. Thompson (1959) Local ... A Memorial Volume in Honor of D. S. Korzhinskii. Cambridge University Press. ...
Title: PowerPoint Presentation Author: Edward B. Rastetter Last modified by: Jenny Yearwood Created Date: 3/9/2006 6:34:53 PM Document presentation format
They may be pure carbonate, or they may contain variable amounts of other ... The diagram focuses on ultramafic-carbonate rocks and omits reactions involving quartz. ...