The results of using method of the VES-IP at studying sand-gravel mixtures on the territory of Mosalsky district of Kaluga region

Abstract

Vertical electrical sounding is a traditional method of exploration of sand-gravel mix deposits. At present geophysicists are challenged not only to discover of the as-dug gravel, but also to determine its basic properties, allocate within the deposits plots with high percentage of gravel or determine the content of clay particles in the sands. To meet these challenges it is necessary to use new methods, in particular, the method of induced polarization. The paper presents the results of DC/IP surveys executed in the territory of Mosalsky district of Kaluga region in 2015. The work was carried out as already known, developed fields of sand-gravel mix deposits, as well as new search areas, which have not yet conducted drilling works. As shown by the results all the deposits of sand-gravels are characterized by high values of induced polarization. The complex selection of the curves of apparent resistivity and apparent polarizability substantially narrows the boundaries of equivalent models in the interpretation of data in complex geological situations where sand and gravel deposits slightly different from the surrounding rocks or covered with a thick layer of conductive loam.