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Earthquake Thermodynamics and Phase Transformation in the Earth's Interior
Imprint: Academic Press
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A group of distinguished scientists contributes to the foundations of a new discipline in Earth sciences: earthquake thermodynamics and thermodynamics of formation of the Earth's interior structures. The predictive powers of thermodynamics are so great that those aspiring to model earthquake and the Earth's interior will certainly wish to be able to use the theory. Thermodynamics is our only method of understanding and predicting the behavior of many environmental, atmospheric, and geological processes. The need for Earth scientists to develop a functional knowledge of thermodynamic concepts and methodology is therefore urgent. Sources of an entropy increase the dissipative and self-organizing systems driving the evolution and dynamics of the Universe and Earth through irreversible processes. The non-linear interactions lead to the formation of fractal structures. From the structural phase transformations the important interior boundaries emerge.
Non-linear interactions between the defects in solids lead the authors to develop the physics of continua with a dense distribution of defects. Disclinations and dislocations interact during a slow evolution as well as during rapid dynamic events, like earthquakes. Splitting the dynamic processes into the 2D fault done and 3D surrounding space brings a new tool for describing the slip nucleation and propagation along the earthquake faults. Seismic efficiency, rupture velocity, and complexity of seismic source zone are considered from different points of view, fracture band earthquake model is developed on the basis of thermodynamics of line defects, like dislocations. Earthquake thermodynamics offers us a microscopic model of earthquake sources.
Physics of defects helps the authors decscribe and explain a number of precursory phenomena caused by the buildup of stresses. Anomalies in electric polarization and electromagnetic radiation prior to earthquakes are considered from this point of view. Through the thermodynamic approach, the authors arrive at the fascinating question of posssibility of earthquake prediction. In general, the Earth is considered here as a multicomponent system. Transport phenomena as well as wave propagation and shock waves are considered in this system subjected also to chemical and phase transformations.
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| Title of eBook: Earthquake Thermodynamics and Phase Transformation in the Earth's Interior | |
| Release Date: 10-11-2000 | |
| Publisher: Academic Press |
This eBook download is available in the following formats:
| Parent title | Earthquake Thermodynamics and Phase... |
|---|---|
| Encrypted (DRM) | Yes |
| SKU | 9780080530659 |
| File size | 34232 |
| Security | n/a |
| Printing | Not allowed |
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| Note | Excellent navigation features are available via Adobe such as bookmarks and a quick access table of contents. Text search is easily accessible. An Adobe DRM-protected file is different than a pdf file in that it uses Adobe DRM (Digital Rights Management) technology, which authors and publishers use to protect their content from illegal online distribution and to set certain privileges such as restrictions on copying and printing. |
Earthquake Thermodynamics and Phase Transformation in the Earth's Interior
Chapter One
The Composition of the Earth
William F. McDonough
The composition of the Earth, integrated from core to atmosphere, is comparable to that of undifferentiated meteorites (chondrites). But this simple statement offers little insight into the kind of chondrite the Earth most resembles or if even there is a good analog to the Earth in our present spectrum of chondritic meteorites. It also tells us little of how the Earth got to its present configuration (Fig. 1.1) (i.e., a three-layered, metal–rock–water system). The geophysical, geochemical, and geological characteristics of the Earth reveal much about the planet's overall system. However, when we seek to describe the whole body, such information requires considerable integration and interpretation to see through the last 4.6 Ga of geological history. Improving our understanding of the Earth's composition yields insights into how our planet formed and evolved, as well as providing insights into our planetary neighbors.
Estimating the composition of the Earth requires derivation of the core and silicate Earth (crust plus mantle) composition. A number of papers provide an estimate of the composition of the primitive mantle (or silicate Earth), which are based on samples of the mantle and meteorites, and these show good agreement (Allegre et al, 1995b; Jagoutz et al., 1979; McDonough and Sun, 1995; O'Neill and Palme, 1997). Estimates of the core's composition are less certain, given uncertainties as to the nature of the light element in the outer core. Iron meteorites give insights into elements that might be in the core, but these
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