Six scientific-informative paradoxes of the current state of geoecology are determined. New theoretical foundations of geoecology as an interdisciplinary science, developed on the basis of the concept of ecological functions of Earth abiotic spheres, are formulated. They include ideas about the content, object, subject, logical and scientific structures of geoecology, geoecological conditions and their condition, the position of geoecology in the system of sciences about the Earth and the biosphere.

In the light of modern data, the validity of the existence of two supercontinents in the Proterozoic, previously identified by the author, is considered. The analysis of these data, in particular the results of published paleomagnetic studies, suggests in favor of such identification. At the same time, the existing “generally accepted” sequence of supercontinents in the history of the Earth is not violated, but supplemented.

Morphostructural analysis of the relief and the analysis of the self-similarity characteristics of stream network of the Northern Sikhote-Alin and adjacent territories were carried out. The relief of the studied territory has an inherited character; it was formed in several stages during the neotectonic stage. The most intense vertical movements occurred at the early phases of the neotectonic stage. At Pleistocene time the intensity of vertical movements decreased significantly. At this time, the modern erosion-denudation forms of relief was formed. At the final stages of neotectonic development (at the end of the Pleistocene — Holocene), there was a slight activation of vertical movements with a changes in the structural plan and the manifestation of NNE stretched structures in the relief, which was reflected in the features of the residual relief. The boundaries of areas with increased residual relief coincide with areas of increased seismicity in the region. A modification of the complex self-similarity parameter PRNS was proposed, the use application of which allowed us to improve the correlation of this parameter with the latest (youngest) movements detected by the morphostructural method. Zones of maximum PRNS values correlate with the areas of greatest relief increment, and zones of it’s minimum correlate with areas the smallest relief increment, or areas of most significant erosion. The results of the analysis of the characteristics of self-similarity of the stream network are mainly comparable with the manifestations of vertical tectonic movements at the final stages of neotectonic development.

By these days issues of survey of blind and covered deposits are very actual. High affectivity of geological and prospecting abilities could be achieved only when complex studies have been done which allow to indicate structural elements of explores area and evaluate geological and geochemical potential of prospective areas. In the article the structural and geochemical criterion developed by authors is considered. Its use is preceded by definition of the structural and geological characteristic of the territory based on the method of paleovolcanic reconstruction. At the later stage areas, perspective for detection of an ore mineralization are outlined basing on localization of various type of a mineralization at specified structural units of paleovolcanic structures. Application of geochemical mapping within the perspective areas allows to estimate prospects of the areas, to allocate most perspective sites with their preliminary geochemical estimate.

The paper presents the pore waters composition’s experimental results in the northeastern part of the Barents Sea. The pore water contains Cl^–, Na⁺, SO4 ^2– and Mg²⁺ as dominant components and is quite similar to the Barents Seawater composition. For the first time, we measured the cation exchange capacity of (13.98-35.50 meq/100 g) and the exchanging cations composition (Na⁺>Mg²⁺>Ca²⁺>K⁺) of bottom sediments. We find that most of the sampled pore water (near 90%) have marine nature, and only near 10% is slightly transformed with sulfate reduction processes due to the diagenesis. We measure that the rare earth elements (REE) content in pore water is up to 1.589 μg/L with their content in sediments up to 144.051 mg/kg, negative cerium and positive europium anomalies are observed both in the pore waters and in bottom sediments. We calculated using PHREEQC that pore water undersaturated to gypsum and halite and supersaturated to calcite and dolomite, which may precipitate in deposits during diagenesis.

High-frequency electric field measurements with a regular receiving dipole characterized by poor electrode contact are greatly influenced by the capacitive currents arising between wires and ground. At the same time, making use of the non-contact receiving dipoles is not generally suitable for low-frequency electric field measurements.

We introduce a novel hybrid galvanic-capacitive receiving dipole, which could be used for broadband electric field measurement even with high contact resistance of the grounded electrodes.

The paper presents an analysis of materials from studies of the Neopleistocene sedimentary complexes and aquifer system: lithological, mineralogical-geochemical, hydrogeochemical, hydrogeofiltration and hydrogeomigration in the region of development of the Astrakhan gas condensate field (AGCF). The main provisions of the model of the formation of groundwater, the specifics of their balance, the chemical composition of hydrogeodynamics, hydrogeomigration, and the main governing factors are formulated. The predominance of marine sediments in complexly constructed strata of the Neopleistocene, with a significant role of clay layers and fragmentary traces of continental development, was revealed. Facies and sedimentary environments characteristic of large deltas and shallow marine areas, like the modern North Caspian, have been identified. The system of deltas and deltas of large and small streams is considered with the involvement of geomorphological, landscape-climatic and geodynamic factors for the development of a model for the formation of the studied strata.

In the upper part of the litho-hydrosphere of the AGKM region, a specific landscape-geomorphological pattern was revealed, reflecting the systems of zones of geodynamic instability on a scale of the first hundreds of meters-kilometers. In a significant part of the study area, an association of areas of the greatest thickness and conductivity of aquifers of the Neopleistocene complex with interdome depressions of deep halogenetic structures was revealed. The results obtained are relevant for the development of a model for the formation of aquatic-rock complexes of the Neopleistocene and management of the development of AGCF: identifying ways of spreading pollution; reducing the risk of accidents due to the instability of the foundations of the gas complex facilities and many others.

The conditions for precipitation of magnesium fluoride (sellaite) from seawater with salinity of 35–105‰ were experimentally determined. It was established that precipitation of MgF₂ at salinity of 35, 70, and 105‰ occurs at the concentration of dissolved fluorine above 37, 46, and 51 mg/l, respectively. In isolated evaporitic basins, the fluorine concentration required for the formation of sellaite is not achieved at all stages of the evaporation of seawater. It is assumed that high concentration of fluorine sufficient for the precipitation of sellaite arise as a result of the combined effect of evaporation and additional inflow of this element into evaporitic basins with river runoff or/and the release of coprecipitated and adsorbed fluorine during of postsedimentary recrystallization of salt minerals.