DEVICE FOR PROBING SPECIFIC ELECTRIC RESISTANCE OF BENTHIC MARINE DEPOSITS

摘要

The invention relates to marine electrical prospecting and is intended to study the electrical resistivity of bottom marine sediments. The purpose of the invention is to expand the scope and improve the accuracy of measurements. The device contains a towable non-conductive square base with four slip platforms, at the end of which the invention relates to marine electrical exploration, is intended to study the electrical resistivity of bottom marine sediments and can be used in geological mapping of bottom sediments, prospecting and exploration of deposits, in particular iron-iron value nodules. The aim of the invention is to expand the scope and increase the accuracy of measurements. On one of the diagonals of the square, supply electrodes are located symmetrically with respect to its center, and two receiving electrodes, whose potentials are measured relative to the third remote electrode, are located on the base axis at different distances from the plane of the supply electrodes connected to the two outputs of the alternator. The device also contains two amplifier-recording units consisting of an amplifier, a detector and a recorder, as well as a voltage compensator, a differential circuit, and a reference voltage driver for the second channel synchronous detector. By measuring the new parameter reflecting the variability of the electrical resistivity with depth, increasing the measurement accuracy and improving the towed properties of the device, the field of application of the proposed device has been expanded. FIG. 1 shows the proposed device, the general view in FIG. 2 is the same, the variant in FIG. 3 is the same view from the side of the tail section in FIG. 4 - Functional scheme of the device. The device contains a non-conductive base 1, towed on a cable-cable 2 with sliding platforms 3 and 4, the planes of which form an angle of 90 ° with each other. The device also has an axis of symmetry 5 and the centers of the power supply are S P -4 CO Ј 4 SE