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Mylonites form in response to high rates of strain within deep ductile shear zones, which are the extensions at depth of surface faults, thrusts and fault breccias. They can have many different mineralogical compositions and are therefore defined by their textural appearance. This atlas provides high definition images of a large number of different mylonites allowing students and geologists to correctly classify them with greater ease. It also offers insights into the interpretation of mylonitic fabrics to answer questions such as: from what type of rock did this mylonite derive? what were the metamorphic circumstances during mylonitization? what was the intensity of deformation? and what was the sense of shear?

Mylonite. --- Metamorphic rocks. --- Rocks, Metamorphic --- Earth sciences. --- Geology. --- Earth Sciences. --- Metamorphic rocks --- Rocks --- Roques metamòrfiques --- Roques --- Eclogita --- Esquists --- Gneis --- Marbre --- Migmatita --- Pissarra --- Serpentinita --- Skarn --- Metamorfisme

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1000 °C) and low pressures (< 2 kb) and typically results in the formation of "burnt" and fused rocks termed buchites, paralavas, clinkers and fulgarites. It is typically associated with shallow basaltic intrusions (contact aureoles, xenoliths,) combustion of carbonaceous matter, lightning strikes, and is also found in meteorites. During pyrometamorphism, the sequence of heating and cooling is greatly condensed favouring the preservation of a variety of stranded reaction microstructures that reflect disequilibrium reaction kinetics with metastable and mineral crystallisation. This second edition includes the latest developments in the study of pyrometamorphism derived from over 60 new references and accompanied with over 20 new illustrations.

Metamorphism (Geology) --- Metamorphic rocks. --- Rocks, Metamorphic --- Earth sciences. --- Geochemistry. --- Mineral resources. --- Mineralogy. --- Earth Sciences. --- Mineral Resources. --- Rocks --- Petrology

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This is a richly illustrated reference book that provides a unique, comprehensive, and up-to-date survey of the rocks and structures of fault and shear zones. These zones are fundamental geologic structures in the Earth's crust. Their rigorous analysis is crucial to understanding the kinematics and dynamics of the continental and oceanic crust, the nature of earthquakes, and the formation of gold and hydrocarbon deposits. To document the variety of fault-related rocks, the book presents more than six hundred photographs of structures ranging in scale from outcrop to submicroscopic. These are accompanied by detailed explanations, often including geologic maps and cross sections, contributed by over 125 geoscientists from around the world.The book opens with an extensive introduction by Arthur W. Snoke and Jan Tullis that is itself a major contribution to the field. Fault-related rocks and their origins have long been controversial and subject to inconsistent terminology. Snoke and Tullis address these problems by presenting the currently accepted ideas in the field, focusing on deformation mechanisms and conceptual models for fault and shear zones. They define common terminology and classifications and present a list of important questions for future research. In the main, photographic part of the book, the editors divide the contributions into three broad categories, covering brittle behavior, semi-brittle behavior, and ductile behavior. Under these headings, there are contributions on dozens of subtopics with photographs from localities around the world, including several "type" areas.The book is an unrivaled source of information about fault-related rocks and will be important reading for a broad range of earth scientists, including structural geologists, petrologists, geophysicists, and environmental specialists.Originally published in 1998.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Petrofabric analysis --- Mylonite --- Fabric analysis (Petrology) --- Microtectonics --- Petrofabrics --- Petrology, Structural --- Petrotectonics --- Structural petrology --- Petrology --- Metamorphic rocks --- Atlases.

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Petrogenesis of Metamorphic Rocks presents a large number of diagrams showing the stability relations among minerals and groups of minerals found in metamorphic rocks. The diagrams help to determine the pressure and temperature conditions under which a given set of metamorphic rocks may have formed. Other parameters that control metamorphic mineral assemblages are also discussed and pitfalls resulting from simplifications and generalizations are highlighted. The book discusses the most common metamorphic rock types, their nomenclature, structure and graphical representation of their mineral assemblages. Part I defines basic principles of metamorphism, introduces metamorphic processes, geologic thermometry and barometry and defines metamorphic grade. Part II presents in a systematic way mineralogical changes and assemblages found in the most common types of metamorphic rocks. The computation of diagrams is based on recent advances in quantitative petrology and geochemistry. An extensive bibliography, including the key contributions and classic papers in the field, make it an invaluable source book for graduate students and professional geologists.

Metamorphic rocks. --- Petrogenesis. --- Metamorphic rocks --- Petrogenesis --- Geology --- Earth & Environmental Sciences --- Petrology --- Geology - General --- Petrogeny --- Rocks, Metamorphic --- Earth sciences. --- Geochemistry. --- Geology. --- Mineralogy. --- Geophysics. --- Geography. --- Earth Sciences. --- Geophysics/Geodesy. --- Geography, general. --- Rocks --- Physical geography. --- Cosmography --- Earth sciences --- World history --- Geography --- Chemical composition of the earth --- Chemical geology --- Geological chemistry --- Geology, Chemical --- Chemistry --- Physical geology --- Crystallography --- Minerals --- Geognosy --- Geoscience --- Natural history --- Geological physics --- Terrestrial physics --- Physics

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Pyrometamorphism is a type of contact metamorphism (sanidinite facies) involving very high temperatures that may cause fusion in suitable lithologies at very low pressures. The high temperatures are attained by flow of mafic magma through conduits, by way of spontaneous combustion of coal, carbonaceous sediments, oil and gas, and through the action of lightning strikes. Temperature gradients are typically extreme, varying by several hundred degrees over a few metres or even centimetres. Relatively short periods of heating and cooling create an environment dominated by metastable melting and rapid mineral reaction rates driven by significant temperature overstepping of equilibrium conditions. This results in the formation of a large variety of minerals, many of which are metastable and are only found in pyrometamorphic rocks. The book is aimed for the specialist but also for students and researchers looking for an introduction into pyrometamorphism.

Metamorphism (Geology) --- Metamorphic rocks. --- Rocks, Metamorphic --- Rocks --- Petrology --- Mineralogy. --- Mineral resources. --- Geochemistry. --- Mineral Resources. --- Chemical composition of the earth --- Chemical geology --- Geological chemistry --- Geology, Chemical --- Chemistry --- Earth sciences --- Deposits, Mineral --- Mineral deposits --- Mineral resources --- Mines and mining --- Mining --- Natural resources --- Geology, Economic --- Minerals --- Physical geology --- Crystallography