This, the third collection of such papers has been selected by Bernard Evans of the University of Washington. Much of Earth's crust and arguably parts of its mantle are composed of rock that has undergone partial to complete textural and mineralogical reconstitution as a result of changes in conditions imposed on it. Metamorphic rocks carry a record of surface, shallow and deep geological events and processes going back to 4 Ga. Early in the last century, the descriptive science of metamorphic petrography began a gradual evolution into metamorphic petrology and petrogenesis much as we know it today. Researchers came to depend more and more on related sciences, such as thermodynamics, materials science, mineralogy, tectonophysics, and isotope geochemistry, to provide a fuller understanding of the facts coming from the field and the laboratory. Fundamental principles and procedures from these borrowed sciences helped keep metamorphic petrology moving and contributed to its endless fascination.Hudson (1980) drew schematic P-T diagrams for three whole-rock XMg values and an elevation in the Thompson AFM projection between biotite and chlorite showing uni-, di-, and tri-variant fields for Buchan-style metamorphism of pelites. ... to thermobarometry and on possible P-T-X paths (Dymoke and Sandiford, 1992; Xu et al., 1994; Carrington and Harley, ... Tinkham and Ghent (2005) prefer to use the term aquot;isochemical sectionaquot;, short for aquot;isochemical P-T phase-diagram sectionaquot;.
|Author||:||Bernard W. Evans|
|Publisher||:||Mineralogical Society - 2007|