Electric properties of some sedimentaryiron ores from El Gedida Area, Bahariya
Oasis, Egypt
Marzouk M. Bekhit
Earth Sciences Dept., National Research Center, Egypt |
Electrical properties of rock samples can be used to characterize the connectivity in
porous and heterogeneous media. Together with local porosity distribution they allow
to predict conduction mechanisms.
For the purpose of this work 5 samples of different concentrations of iron ores were
collected from ElGidida area Bahariya Oasis, Egypt. The samples were tested to get
information as to the effect of texture and composition on their electric properties. This
helps in characterizing and studying geologic target.
The mineral composition of rock samples may be identified by its a. c. conductivity. A
rock sample may be considered as composed of relatively conducting constituents and
relatively low conducting ones. Each of these constituents contributes to the electrical
properties of the system. The texture of the rock sample, as well as the relationship
between the distribution of the conducting constituents (hematite) and non-conducting
constituents (quartz), and the nature of this distribution i.e. (texture of the studied
samples), play also an important role in describing the electrical behavior of the tested
system.
The present work sets as its goal the identification of the solid mixture hematite and
quartz to offer a physical model describing the obtained experimental data on the
electrical behavior of such system. On these bases, the 5 samples from Bahariya area
were studied both chemically and electrically. A good relationship is found between both
parameters. It can be generally stated that the higher the grade of the ore the less the
resistivity and the higher the dielectric constant '.
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