STP777

    Electrical Properties of Calcareous Sediments

    Published: Jan 1982


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    Abstract

    The electrical resistivity or its reciprocal, conductivity, of calcareous sediments ranging from lithified coral to oozes was measured in the laboratory. Similar electrical properties of the interstitial water of these sediments were also measured. Formation factor (the ratio of electrical resistivity of the sediment to the electrical resistivity of the interstitial water) was then compared with the specific porosity of each calcareous sediment. The formation factor-porosity relationship was determined for the calcareous sands and oozes. Formation factors ranged from 1.46 to 6.10 while porosities ranged from 28 to 87 percent. The results showed that the void ratios correlated well with the electrical conductivities of these sediments. Electrical resistivity and conductivity measurements have recently been used as an indirect and in situ technique for predicting index and engineering properties of sediments. The data presented in this paper should be useful in predicting the ranges of electrical resistivity and conductivity values associated with calcareous sediments.

    Keywords:

    calcareous sediments, electrical properties, electrical resistivity, electrical conductivity, porosity, void ratio, formation factor


    Author Information:

    Erchul, RA
    Commander, USN, and assistant professor, U.S. Naval Academy, Annapolis, Md.

    Gularte, RC
    Commander, USN, and assistant professor, U.S. Naval Academy, Annapolis, Md.


    Paper ID: STP28914S

    Committee/Subcommittee: D18.25

    DOI: 10.1520/STP28914S


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