The Origin Of Metamorphic And Metasomatic Rocks

A successful tackling of the complex problems in metamorphic petrology depends heavily upon thermodynamics and crystal chemistry. A liberal portion of the present book is therefore devoted to those aspects of thermodynamics and general crystal chemistry which are especially significant for the clarification of metamorphic and metasomatic phenomena. It cannot be emphasized too strongly, however, that much more knowledge and understanding of these basic sciences are needed than may be gained from the present book. Topic examined include fundamental principles of thermodynamics and individual cases of equilibrium systems of metamorphic minerals, discussion of general principles of petrogenesis, and the consideration of some unsolved problems in petrology.

This is a discount Black and white version. Some images may be unclear, please see BCCampus website for the digital version.This book was born out of a 2014 meeting of earth science educators representing most of the universities and colleges in British Columbia, and nurtured by a widely shared frustration that many students are not thriving in courses because textbooks have become too expensive for them to buy. But the real inspiration comes from a fascination for the spectacular geology of western Canada and the many decades that the author spent exploring this region along with colleagues, students, family, and friends. My goal has been to provide an accessible and comprehensive guide to the important topics of geology, richly illustrated with examples from western Canada. Although this text is intended to complement a typical first-year course in physical geology, its contents could be applied to numerous other related courses.

Fluid-aided mass transfer and subsequent mineral re-equilibration are the two defining features of metasomatism and must be present in order for metamorphism to occur. Coupled with igneous and tectonic processes, metasomatism has played a major role in the formation of the Earth’s continental and oceanic crust and lithospheric mantle as well as in their evolution and subsequent stabilization. Metasomatic processes can include ore mineralization, metasomatically induced alteration of oceanic lithosphere, mass transport in and alteration of subducted oceanic crust and overlying mantle wedge, which has subsequent implications regarding mass transport, fluid flow, and volatile storage in the lithospheric mantle overall, as well as both regional and localized crustal metamorphism. Metasomatic alteration of accessory minerals such as zircon or monazite can allow for the dating of metasomatic events as well as give additional information regarding the chemistry of the fluids responsible. Lastly present day movement of fluids in both the lithospheric mantle and deep to mid crust can be observed utilizing geophysical resources such as electrical resistivity and seismic data. Such observations help to further clarify the picture of actual metasomatic processes as inferred from basic petrographic, mineralogical, and geochemical data. The goal of this volume is to bring together a diverse group of geologists, each of whose specialities and long range experience regarding one or more aspects of metasomatism during geologic processes, should allow them to contribute to a series of review chapters, which outline the basis of our current understanding of how metasomatism influences and helps to control both the evolution and stability of the crust and lithospheric mantle.

Geological Society of London Handbook Series Edited by Keith Cox Founded in 1807, the Geological Society of London has been publishing since 1845 and now distributes its journal to Fellows throughout the world. This Handbook is published as part of a series of authoritative practical guides to field geology. The Field Description of Metamorphic Rocks This handbook describes how metamorphic rocks and rock masses may be observed, recorded and mapped in the field. Written at a level suitable for undergraduate students of geology, this book (as with its companion volumes in the series) has firmly established itself as an essential tool for any geologist -- student, professional or amateur -- faced with the task of making a general description of an area of metamorphic rocks. A clear, systematic framework together with numerous diagrams, illustrations and checklists enables readers to produce useful and broadly similar descriptions, despite possible differences of background or specialist interest. This well-written and well-produced little text will, I am certain, become standard reading for most geology undergraduates. It will also interest many geologists who do not regularly work in metamorphic terrains and will be particularly useful to engineering geologists and civil engineers who are often concerned with describing the fabrics of metamorphic rocks without being concerned about their origins. M.E. Jones, Mineralogical Magazine Contents: Metamorphic Fieldwork and Mapping -- Names and Categories of Metamorphic Rocks and Rock Units -- Rock Banding -- Minerals -- Compositions -- Grade -- Textures -- Fabric Types -- Relations to Structures -- Undeformed Pods -- Augen -- Pseudomorphs -- Veins -- Igneous Contacts -- Metasomatism -- Reaction Zones -- Fault-Zones and Mylonites -- Reference Tables and Checklists.

This 2007 book presents a complete nomenclature of metamorphic rock terms for all geoscientists studying metamorphic rocks.

From metamorphism to metamorphosis, there is only a shade of a nuance. Because me- morphic rocks are not only what they are, but also what they were, and they tell of what happened in between. What must be discovered: how to recognize in the butterfly, the caterpillar that was, or in the caterpillar the butterfly that will be? And how to describe the metamorphosis, excuse me, metamorphism which leads from one to the other? It is to this engaging history, this marvelous tale, written progressively over time, which Jacques Kornprobst leads us. If the sedimentary and magmatic rocks have been the object of reflection for a long time, for which a contradiction was established in the century in the confrontation between the Neptunism of Werner for whom everything came from the sea, and the P- tonism of Hutton who derived all rocks from the interior of the earth, the “crystalline schists” as they were called, and as we call them today for simplicity, appear most ambi- ous: they had the crystals of rocks of endogenous origin and appeared to have the strati- cation of exogenous rocks with which one confused the schistosity. These crystalline schists are in some ways the bats of the rock kingdom.