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Electrical Properties of Rocks (Paperback, Softcover reprint of the original 1st ed. 1967)
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Electrical Properties of Rocks (Paperback, Softcover reprint of the original 1st ed. 1967)
Series: Monographs in Geoscience
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Recently there has been growing interest in the physical properties
of rocks. To interpret data on the geophysical fields observed near
the Earth's surface, we must know the physical properties of the
materials composing the interior. Moreover, the development of
geophysical methods (in particular, electrical methods) is
necessitating a multiple approach to the study of the physical
properties of rocks and minerals. In connection with problems now
appearing, the physical properties of rocks must be studied in the
laboratory under var ious thermodynamic conditions. Electrical
methods of geophysi cal exploration often may require only data
obtained at atmos pheric pressure and room temperature, or at
temperatures below 100 DegreesC. If, however, we have in mind
geophysical field observa tions on the composition and state of
matter deep in the Earth's crust and mantle, we must conduct
laboratory experiments at high pressures and temperatures. For
example, in interpreting data from geomagnetic soundings of the
mantle, we may need experi mental results on the electrical
properties of rocks at pressures of tens of kilobars and
temperatures of the order of lOOO DegreesC. In this connection, we
must remember that pressure has relatively little effect on the
electrical properties of rocks, whereas, tem perature affects them
very strongly. v vi FOREWORD At present, while research into the
mechanical properties of rocks (relating to the problems of
geophysics, geochemistry, geology, and mining) is pressing forward
on a wide front, much less work is being done with electrical
properties.
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