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There has been a great advance in the understanding of processes of meta morphism and of metamorphic rocks since the last edition of this book appeared. Methods for determining temperatures and pressures have become almost routine, and there is a wide appreciation that there is not a single temperature and pressure of metamorphism, but that rocks may preserve, in their minerals, chemistry and textures, traces of their history of burial, heating, deformation and permeation by fluids. However, this excit ing new knowledge is still often difficult for non-specialists to understand, and this book, like the first edition, aims at enlightenment. I have concen trated on the interpretation of the plate tectonic settings of metamorphism, rather than following a geochemical approach. Although there is an impress ive degree of agreement between the two, I believe that attempting to discover the tectonic conditions accompanying rock recrystallization will more readily arouse the interest of the beginner. I have used a series of case histories, as in the first edition, drawing on my own direct experience as far as possible. This m
Sommario
Part 1 The three field categories of metamorphic rocks; studying thin sections of metamorphic rocks; laboratory study of metamorphic rocks; why study metamorphic rocks? Part 2 Rock and mineral compositions and their relationship; classification of metamorphic rocks; thermo-tectonic modelling. Part 3 Metamorphism associated with igneous intrusions: the Skiddaw Contact Aureole, Cumbria, England; the Bheinn and Dubhaich Aureole, Isle of Skye, Scotland. Part 4 Dynamic metamorphism: the Mutki granitic Mylonite, Turkey. Part 5 Metamorphism associated with lithospheric extension: metamorphism at spreading ocean ridges. Part 6 Metamorphism in subduction zones. Part 7 Metamorphism in collision zones: metamorphic evolution of pelitic rocks of Connemara, Ireland. Part 8 Metamorphism in stable continental crust: metamorphism in Dengfeng County, Henan Province, China; Pyroxene gneisses of northwestern Scotland; the Adirondack Mountains, State of New York, U.S.A.; heat-flow and thermal gradients in continental crust. Part 9 Metamorphic rocks of the mantle. Part 10 Extra-terrestrial metamorphism.
Riassunto
There has been a great advance in the understanding of processes of meta morphism and of metamorphic rocks since the last edition of this book appeared.
