AN INTRODUCTION TO METAMORPHIC PETROLOGY BY BRUCE YARDLEY PDF

Shale is a sedimentary term. Slate refers to a fine-grained, low-grade metasedimentary rock in which bedding is typically still visible: Schist refers to a medium- to high-grade, medium- to coarse-grained metamorphic rock of any composition that has a fabric. For example, Gneiss refers to a high-grade, coarse-grained metamorphic rock of any composition that has a fabric: paragneiss: a metasedimentary gneiss. This is a metamorphosed and deformed Rapikivi granite from Norway: Complex and blobby plutonic complexes can become extremely layered as a result of deformation: lineation: a linear fabric; typically defined by either linear minerals, such as hornblende, or stretched grains, such as quartz. Rocks with purely linear fabrics are called L tectonites and form by a constrictional deformation prolate strain ellipsoid. Here is a mylonitic granite from Norway, with clearly stretched K-feldspar grains in a fine-grained matrix of quartz, plagioclase, and biotite: same rock up close: foliation: a planar fabric; typically defined by platy minerals such as mica or flattened grains such as quartz.

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Shale is a sedimentary term. Slate refers to a fine-grained, low-grade metasedimentary rock in which bedding is typically still visible: Schist refers to a medium- to high-grade, medium- to coarse-grained metamorphic rock of any composition that has a fabric.

For example, Gneiss refers to a high-grade, coarse-grained metamorphic rock of any composition that has a fabric: paragneiss: a metasedimentary gneiss. This is a metamorphosed and deformed Rapikivi granite from Norway: Complex and blobby plutonic complexes can become extremely layered as a result of deformation: lineation: a linear fabric; typically defined by either linear minerals, such as hornblende, or stretched grains, such as quartz.

Rocks with purely linear fabrics are called L tectonites and form by a constrictional deformation prolate strain ellipsoid. Here is a mylonitic granite from Norway, with clearly stretched K-feldspar grains in a fine-grained matrix of quartz, plagioclase, and biotite: same rock up close: foliation: a planar fabric; typically defined by platy minerals such as mica or flattened grains such as quartz.

This is a more general term that encompasses cleavage and schistosity. Rocks with purely planar fabrics are called S tectonites and form by a flattening deformation oblate strain ellipsoid.

Most metamorphic rocks are L-S tectonites that form from a more general strain history. Most commonly used to describe low-grade micaceous pelitic rocks such as slate. Most commonly used to describe medium-grade rocks such as schists of nearly any bulk composition.

Most commonly used to describe high-grade metaplutonic rocks such as gneisses. A Rapikivi granite being turned into a gneiss Norway. This Norwegian rock shows chlorite pseudomorphs after garnet: idioblastic: sharp crystal form euhedral in igneous terminology. The mineral shown is sphene CaTiSiO5 , with its characteristic high relief and extreme birefringence.

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AN INTRODUCTION TO METAMORPHIC PETROLOGY BY BRUCE YARDLEY PDF

Thermodynamics Notes Part This small change in stress causes a change in Gibbs free energy that can drive dissolution of minerals typically in response to compression and their reprecipitation in veins or along grain boundaries typically in response to tension : Stylolites are subplanar, wavy features developed where insoluble residues remain behind when the soluble material has been carried away by grain-boundary diffusion: View formation of a stylolite Veins are subplanar concentrations of minerals that have precipitated from solution. They form when a solution is saturated with respect to a particular dissolved mineral. In quartz, for example, the solubility of silica in aqueous H2O-rich solutions decreases dramatically with decreasing temperature, such that quartz dissolves into fluid at high temperature, but then precipitates as the solution cools and becomes supersaturated: An array of veins in sandstone Costa Rica : Another array of en-echelon veins in China: A larger vein in outcrop: View cracking and void formation during brittle-ductile deformation A special kind of vein called a crack-seal vein forms by repeated cracking along the vein edge, which leads to a line of wall fragments: An antitaxial vein: View formation of a vein during deformation A vein with large quartz candles: View growth of quartz candles into a vug or vein Fibres that grow inside fault planes provide important information about sense of fault motion. This is a normal fault: Strain shadows are a kind of grain-scale vein that forms from dissolution of material elsewhere and reprecipitation in the dilatational side of a porphyroclast or other hard grain.

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An Introduction to Metamorphic Petrology

Samuk Just a moment while we sign you in to your Goodreads account. Metamorphism of Pelitic Rocks. To view it, click here. Visit our Beautiful Books page and find lovely books for kids, photography lovers and more. Colette rated it it was amazing Jun 27, Petrologh concepts of metamorphism. Lucas Garcindo rated it it was amazing Dec 03, Metamorphisms of basic igneous rocks.

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An Introduction to Metamorphic Petrology by Bruce W. Yardley (1996, Paperback)

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