f In-Situ and laboratory measurements of electrical resistivity on marine sediments

Laboratory measurements on core samples are commonly used to investigate the physical properties of marine sediments. But sediment properties are altered due to the removal from in-situ pressure and temperature conditions. Therefore, in-situ measurements are preferable. In a research project of Leipzig University and Baltic Sea Research Institute, an Electrical In-Situ Apparatus (ELISA) is developed which allows high resolution measurements of electrical resistivity in soft sediments in a tomografic principle. The instrument will consist of three cylindrical plastic probes (length 3 m) with 25 point-like electrodes (distance 10 cm), which are connected by multicore cables to a multichannel resistivity meter onboard a research vessel (see Fig. 1). First part of the instrument is a single probe with 25 electrodes.