Home – Home – Jornals – Contemporary Problems of Ecology 2009 number 5

A new version of the tectonic map for the Vendian-Lower Paleozoic structural stage of the Lena-Tunguska petroleum province is presented. The map is based on the electronic structure map at a scale of 1:1,000,000, which was the first to be compiled for the uppermost Vendian within the study area. However, no tectonic zonation was made for the deep-buried Meso-Cenozoic Yenisei-Khatanga and Vilyui depressions. The principles and methodology of mapping are given. The study presents spatial, morphological, and quantitative characteristics of the major and large structures.

The Olyutorsky-Kamchatka foldbelt formed as a result of two successive collisions of the Achaivayam-Valaginsky and Kronotsky-Commander island arcs with the Eurasian margin where the two terranes docked after a long NW transport. We model their motion history from the Middle Campanian to Present and illustrate the respective plate margin evolution with ten reconstructions. In this modeling the arcs are assumed to travel on the periphery of the large plates of Eurasia, North America, Pacific, and Kula, for which the velocities and directions of motion are known from published data. The model predicts that the Achaivayam-Valaginsky arc was the leading edge of the Kula plate from the Middle Campanian to the Middle Paleocene and then moved slowly with the Pacific plate as long as the Middle Eocene when it accreted to Eurasia. The Kronotsky arc initiated in the Middle Campanian on the margin of North America and was its part till the latest Paleocene when the terrane changed polarity to move northwestward with the Pacific plate and eventually to collide with Eurasia in the Late Miocene. The predicted paleolatitudes of the Achaivayam-Valaginsky and Kronotsky-Commander island arcs for the latest Cretaceous and Paleogene are consistent with nine (out of eleven) reliable paleomagnetic determinations for samples from the two arcs. Additional changes imposed on the initial model parameters (kinematics of the large plates, relative position of the Kula-Pacific Ridge and the Emperor seamount chain, or time of active volcanism within the arcs) worsen the fit of the final reconstructions to available geological and paleomagnetic data. Therefore, the suggested model appears to be the most consistent one at this stage of knowledge.

We report results of transect radon surveys on twenty six large and small faults of different geometries in the western Baikal and southern Angara (southern Siberian craton) areas. The studied faults show up in the radon field as broad zones of high radon activity concentration, with their widths 1.4 times the widths of faulting-related deformation zones. Other things being equal, radon emanation depends on the size and slip geometry of faults and on their activity in the Cenozoic. Relative radon activity is higher in rift faults than in cratonic ones, in normal relative to strike-slip faults, and in larger and more active faults, the latter factor being the basic geodynamic control of radon emanation.

The Asachinskoe epithermal Au-Ag deposit (southern Kamchatka) is referred to as low-sulfidation in quartz-adularia-sericite in Corbett's classification. Research into fluid inclusions of its minerals gave an insight into the PT -conditions of formation and gas composition of ore-forming fluids as well as the vertical variations in these parameters to a depth of more than 200 m within a 2 km long horizontal site of the deposit ore zone. It is shown that mineral assemblages formed at 320 to <100 °C. Ore-forming hydrothermal solutions were poor in salts (3-9.2 wt.% NaCl equiv.), with NaCl being the main component. Mineral assemblages with high contents of Au crystallized at 250-175 °C. Ore-free quartz-carbonate veins formed at 80-120 °C. High-temperature (300-320 °C) veins also lack ores. Rich gold ores were deposited in the environments where ore-bearing fluids boiled, mixing with meteoric waters.

We studied ferrous paralava, a high-temperature rock, produced by complete fusion of the sedimentary protolith in the Ravat natural coal fire which has been on for over two thousand years. The paralava was sampled from the Fan-Yagnob coal deposit at the Kukhi-Malik site in the vicinity of former Ravat Village in central Tajikistan. This rock contains fayalite, sekaninaite, hercynite, Ti-magnetite, tridymite, and siliceous glass. Low-Ca pyroxene (clinoferrosilite), globules of sulfides (mainly pyrrhotite) and Fe-Ti oxides, secondary greenalite (after fayalite) and hematite are minor. Paralava includes xenoliths of partially molten clinkers (up to 20 vol.%) composed of mullite, cordierite, tridymite, and relict detrital quartz. We found relatively high Fe contents (100 · Fe/(Fe+Mg) > 60) in mafic minerals, high K₂O enrichment (up to 1.4 wt.%) in sekaninaite, and an unusually low CaO content (0.5 wt.%) in the rock. The Ravat paralava appears to be derived from a mixture of pelitic rocks (50-70%) and iron-rich rocks (30-50%), but without participation of calcareous material, which explains the low CaO and the absence of plagioclase and Ca-bearing pyroxene. The primary melt was as hot as >1210 °C, and the coal-fired fayalite-sekaninaite paralava crystallized at 1200-1100 °C, at a relatively low oxygen fugacity (near the QFM buffer), outside the zone of active aeration. Large-scale crystallization of ferrospinels and fayalite led to increasing Al₂O₃ and SiO₂ in the melt whence sekaninaite and tridymite crystallized as later phases. The residual melt progressively acquired a more silicic-aluminous composition, rich in K₂O, CaO, and P₂O₅, and became quenched to glass at >1080-1090 °C, when temperature dropped abruptly, possibly, by roof collapse or opening of large cracks, as it usually happens in underground coal fires.

Results of research into recent sediments and their distribution in Lake Baikal are presented. Five areas with different mechanisms of sedimentation have been recognized: (1) deep-water plains with pelagic mud and turbidites; (2) littoral zones without turbidites; (3) underwater ridges (rises) with hemipelagic mud accumulated under calm sedimentation conditions; (4) delta (fan) areas near the mouths of large rivers, where sediments consist mainly of terrigenous material; and (5) shallow Maloe More with poorly sorted terrigenous material and abundant sand. The rate of sedimentation differs considerably in different Baikal areas. The highest rates appear near the mouths of large rivers, lower ones occur in the deep lake basins, and the minimum rates are developed on underwater ridges. A map of the distribution of Holocene sediments in Baikal has been compiled for the first time. The obtained results show that the bottom morphology significantly determines the type of sediments in the lake.

We suggest to approximate the depth-dependent conductivity of layered formations by continuous functions and use this approach to design an algorithm for 2D inversion of induction logging data. The logs represent formations consisting of alternating thin clay and sand layers of varying thickness, in which the sand layers can involve a developed invaded zone of a complex structure. Comparison of synthetic logs in models with piecewise constant and continuous approximations of conductivity shows that the continuous-function approximation is accurate within 5%, and the accuracy improves as the average conductivity of the layered formation is taken into account.

The dependence of P - and S -wave attenuation on strain amplitude and frequency has been studied experimentally in dry and water-saturated sandstone samples under a confining pressure of 20 MPa. Attenuation of P and S reflections was measured at a frequency of 1 MHz in a strain range of ε ~ (0.3—2.0) ·10^–6. The measured P -wave attenuation ( Q_P^–1) in dry sandstone and S -wave attenuation ( Q_S^–1) in dry and saturated samples turned out to be inversely proportional to strain amplitude while Q_P^–1 in saturated sandstone showed no strain dependence. The frequency-dependent attenuation spectra in dry and saturated sandstone differed considerably in S waves but were generally similar for P reflections. Strain amplitude variations were found out to influence the frequency dependence of attenuation and to shift the relaxation spectra of S waves toward high frequencies relative to those of P waves. As strain increased, the S -wave attenuation peak in saturated sandstone became notably (to 40%) narrower. The unusual strain amplitude-dependent behavior of attenuation may be due to joint action of viscoelastic and microplastic mechanisms. The reported results may be useful for improving geological interpretation of acoustic and seismic data.

The Erdenetiyn-Ovoo magmatic center (EMC) with a porphyry Cu-Mo deposit includes the following intrusive complexes: Selenga, Shivota, ore-bearing porphyry, and post-ore dike. The EMC formed at 260-200 Ma. The geologic evolution of northern Mongolia in that period was much determined by the effect of a mantle plume, which showed two periods of activity: Late Paleozoic and Early Mesozoic. The long multistage evolution of the EMC was due to its localization on the periphery of the Late Paleozoic and Early Mesozoic areas of the plume's influence. The Shivota and post-ore basites are considered to be comagmatic to the Late Permian-Early Triassic trachyandesite-basalt and Late Triassic-Early Jurassic trachyandesite series, respectively, which are similar to the products of Late Paleozoic and Early Mesozoic within-plate magmatism in northern Mongolia. The Selenga complex, which formed before the Shivota one, and the porphyry complex, which formed before the post-ore dike one, are differentiated gabbro-granite series. Gabbro-granitoid magmatism was initiated by the melting of rocks of continental lithosphere under the action of a plume. Later on, as the plume ascended to the surface and the lithosphere became thinner, the conditions were created favoring the lithosphere breakthrough and within-plate basaltoid magmatism.
In geochemical features (high contents of LILE and LREE, low contents of HFSE and HREE) the studied basites are similar to the products of subduction magmatism. But this contradicts the geologic position of basites formed after the completion of subduction during the transition of the region to the rifting stage and during the rifting. The mantle metasomatized during the preceding subduction is regarded as the main source of basites. The high contents of alkalies and LREE in the volcanics of the post-ore dike complex and the REE patterns similar to the OIB ones evidence the influence of the plume on the magma formation. The high contents of incompatible trace elements and the Nd isotope composition corresponding to the weakly depleted mantle do not exclude a possible plume effect during the formation of the Selenga complex gabbroids. The geochemical features of the Shivota gabbros, comagmatic to volcanics produced during the Late Paleozoic within-plate activity, are partly transformed during the melt evolution in crustal chambers.
The REE patterns of the EMC basites evidence that the evolution of ascending magma was accompanied by the fractionation of amphibole. During this process, ore elements were redistributed into mineral and concentrated in amphibole-containing rocks, from which metals were later mobilized by late melts and fluids. The evolution of basaltoid magmatism of the Selenga, Shivota, and porphyry complexes is regarded as a preliminary stage of ore formation, which was considerably responsible for the EMC productivity.

A representative sample of microdiamonds in calc-silicate and garnet-pyroxene-quartz rocks and gneisses from the cross section of an adit driven at the Kumdy-Kol' deposit (Northern Kazakhstan) has been analyzed. Microdiamonds from these rocks were studied by Fourier-transform infrared spectroscopy for the first time. It has been established that nitrogen impurity content (300-3000 ppm) and nitrogen aggregation degree (14-75%) vary widely and do not correlate with each other. The variation is probably due to the uneven distribution of nitrogen in crystals and to their specific internal structures.
The results of the study show that in most diamondiferous rocks, diamonds crystallized from a fluid/melt of composition varying between aqueous-carbonate and aqueous-silicate end-members. Spectroscopy studies partly disagree with literature data on individual nanoinclusions in diamonds. The cause of this discrepancy may be the evolution of the fluid/melt during diamond crystallization.

The criteria for the evaluation of the REE composition of phosphorites and sedimentary rocks have been determined. These data are required to reconstruct depositional environments. Literature data on the geochemistry of some phosphorite deposits of Eurasia are considered. The REE patterns of Mesozoic phosphorites of the East European Platform are studied. On the basis of REE contents, the ratios of lanthanides and fields on the La-(Nd + Sm)-(Y + Dy), La-(Ce + Nd + Sm)-(Y + Dy), and LREE-MREE-(HREE × 10) diagrams have been determined as indicators of climate and the depth and facies conditions of sedimentation.

Platinum group element (PGE) mineral assemblage has been discovered in the gold placers along the Burgastain Gol and Iljgen Gol (Western Mongolia). It includes isoferroplatinum (Pt₃Fe) grains with inclusions of cooperite (PtS), laurite-erlichmanite (RuS₂-OsS₂), cuprorhodsite-malanite (CuRh₂S₄-CuPt₂S₄), irarsite-hollingworthite (IrAsS-RhAsS), and bowieite (Rh₂S₃).
It has been established that the isoferroplatinum assemblage was generated from a volcanoplutonic picrite complex in the Ureg Nuur area, which is widespread in the central part of the Harhiraa accretionary terrane. According to composition, the PGE mineral-Cr-spinel assemblage was referred to as the Ural-Alaskan type.

The study presents results of a hydrogeological and hydrogeological research conducted on the Mesozoic-Cenozoic sedimentary cover and Precambrian-Paleozoic platform deposits of the Pre-Yenisei petroleum subprovince. The hydrogeological structure of the study area is found to be of a transition type from the West Siberian to Tunguska artesian basins, with its own set of pertinent parameters, such as groundwater depths, rock permeabilities, water chemistry and gas compositions, gas saturation, vertical zoning, etc. The upper part of the sedimentary section is known to be flushed with the infiltration waters to depths of 2-2.5 km. The deeper intervals contain the older sedimentary waters with the moderate metamorphic grade. The results of the study provide implications for the petroleum potential of the area of interest.

Sedimentary processes in the paleocoastal part of the Bengal basin that occured in the Tertiary and Quaternary have been addressed. Three indicators were used: sedimentary bedding forms, microstructure of the sediment, and trace fossils. Various forms of sedimentary structures developed under the influence of dynamic geomorphic processes in the study area in the Quaternary. The microstructure analysis of the sedimentary materials was made by two methods: microphotography and Digital Color Analysis (DCA). The microstructure analysis shows that the geomorphic process remained very dynamic in the Quaternary, influencing the form, thickness, and mineral composition of the sediment strata. The enrichment of the sediments in heavy minerals evidences either oscillating or combined flow sedimentation, while under stable conditions light-mineral deposition took place. The digital data of microfabric study by the DCA method also show that larger particles deposited in the oscillating or high-flow environment and evidence a greater amount of heavy minerals like ferruginous materials. Trace fossils found in the sediments of this area also strongly support the concept that the environment remained dynamic during the Tertiary and Quaternary. The Late Tertiary deposition shows that, during these periods, the sediments were transported from tide-dominated marine coast with low flow energy, which is typical of hot and humid conditions. From Late Tertiary to Early Quaternary, the macrotidal coast became mesotidal (wave-dominated). The second phase is the Middle Pleistocene, when the environment was stable, favoring the continuous deposition of finer particles under low- to medium-flow energy conditions. The third phase, the Recent, is marked by the shoreline shift and modification of the environment. In the Early-Middle Holocene, the shoreline started to shift, which modified the geomorphic conditions of this place from coastal to estuarine and, finally, inland fluvial.

We have simulated ungrounded horizontal loop transient responses of a two-layer earth consisting of a magnetically viscous layer above (model 1) or below (model 2) a nonmagnetic layer. The transient responses of a two-layer magnetically viscous earth can be computed using the superposition principle because magnetic relaxation and eddy current responses are independent at electrical conductivities typical of the real subsurface. The transients are presented and analyzed in the form of Y = f(h₁) functions, where h₁ is the upper layer thickness and Y is the response (at some fixed time) of a two-layer ground normalized to that of a uniform ground with its magnetic viscosity as in the upper (model 1) or lower (model 2) layer. In model 1, the Y function increases as magnetic viscosity grows in the upper layer while the latter is thinner than the loop size, but the magnetic relaxation responses of a thicker upper layer are almost identical to that of a uniform magnetically viscous ground. In model 2, the Y responses are likewise almost identical to that of a uniform magnetically viscous ground (h₁ = 0) as far as the thickness of the upper layer remains small, but they decrease, first slowly and then ever more rapidly, after the layer becomes 15-20% thicker than the transmitter size. The effective sounditng depth in a magnetically viscous ground being controlled by the size of the transmitter, it is reasonable to use geometrical sounding to resolve the vertical distribution of magnetic viscosity.

We explore the possibility to identify a nonconducting object of a known size and geometry buried in sand-clay conducting sediments lying over frozen ground. The anomaly, which is located on the surface of the low-conducting layer, is detected with a multi-electrode dc array. Its 3D electric field is simulated as a boundary-value problem using specially designed software. The new algorithm is tested with synthetic and field data and the results are used to develop the procedure of object identification and location.

The paper presents objections against assigning picritic and some other igneous rocks to lamproite as suggested by N.V. Vladykin, both in general and in particular for the case of the large Tomtor pluton of alkaline and carbonatite rocks in northwestern Sakha Republic (Yakutia). Classifying the Tomtor picrites (picritic porphyry and its breccia-like varieties) as lamproite appears to be inconsistent with their chemistry, mineralogy, and geology. Discussed are errors and poorly proven postulates in the related publications by Vladykin, which contradict the available field data.

The paper explores correlation between the structure of a mesa-economic system and institutional features. Having analyzed the spatial context of small business and having compared the innovation company clusters of different managerial types, we can state that institutional environment and a type of mesa-economic system proved to be interrelated. We also identified the factors and models of business clusters.

The paper considers the methodology of systemic regional studies including the peculiarities of the object and method of analysis; identifies the reasons of mismatching a basic model of regional studies and the most critical regional problems, and describes the contradiction between the new objectives of regional development, on the one hand, and Russian regional policy, on the other hand. The paper analyses the relation of regional and economic policies, and the issues of how to ensure the adequate information support for studies and to provide the management of regional development processes.

Proceeding from a view that a municipal level of governance seems to be a matter-of-course basis both for federate relations and an effective decentralized decision-making system in modern economy, we consider the development issues of municipal units and population settlement patterns. We also discuss what informational base is required to make good strategic decisions on of population settlement patterns, and try to identify what threats the recessionary events, which are progressing in Russian economy, may pose to municipal units and what capacities municipal units have to resist.

The paper analyses the statistical assessments concerning Russian regional development in 2007-2008, and gives a forecast of the socio-economic regional development for the period of time up to 2011. The scale of the recovery growth by 2012 is presented here as well as the basic trends in spatial structure. Our calculations show that most RF regions, within the framework of an experts' moderately optimistic scenario of possible development in the Russian Federation, will overcome an active phase of their economic recession by 2012.

The paper analyses how the regional differentiation of real sectors of the economy and intergovernmental relations changed over the last few years. We consider the links between economic growth and regional differentiation as well as the trends of how regional fiscal equilibrium changes including those changes caused by regional merging processes.

We assess some indicators of regional economic activity which can show the competitiveness of a region, and analyze key factors which are of importance for their higher competitiveness and which we consider to be an empirical basis for assessing regional competitiveness. Factors and impetus to higher regional competitiveness are classified. To illustrate our conclusions, we compared some competitive positions of the Novosibirsk Oblast with those for other regions of the Siberian Federal District.

The intersectoral instruments proposed to assess disbenefits of a project being implemented in a region allow analyzing not only the effect of the project on a local economy, as a limited number of contiguous and visible links are taken into consideration, but also its effect on a national economy. To illustrate this, we applied here the natural gas development project for Yamal peninsula. In our opinion, the intensive implementation of this project is required even if the world's demand for gas drops.

The paper analyzes the regional legislative improvements of external economic relations made by the Sakhalin Oblast's authorities, and shows that this process should be intensified since the potential of the region, being a frontier one, has not been fully realized despite its positive dynamics in foreign trade and foreign investments.

This sociological research is devoted to the analysis of labour market and educational services in the Novosibirsk Oblast, and shows employers' demand both for professional training (types and levels) and employees' competences (professional and social).

We show how the labour behaviour and stuffing models are shaping in an innovation sector of the economy as well as the incentives and factors of such shaping. We also assess to what degree the educational, professional, labour and personality potential of the professionally trained youth is presently utilized.

The paper shows what the project connecting the Trans-Korean and Trans-Siberian railways contributes to the Russia-Republic of Korea cooperation aimed at the development of the Far East and Siberia natural resources. We identified the alternative variants of implementing the project as well as the advantages that the Republic of Korea would have in comparison with other potential parties of the project. We consider the project to be of high risk.

The paper considers the dynamics of cargo traffic and its servicing by the Khabarovsk Kray transportation system. The ratio of the today and prospective cargo traffic being served by different modes of transportation and in basic transportation hubs are assessed allowing for the transit traffic. The development of this regional transportation system is considered within the framework of a long-term national transportation strategy (up to 2020).

We consider the problem of how to select an investment project according to a two-criterion technique and illustrate this issue by the transportation-and- logistic center project for the Novosibirsk Oblast. We also analyze how regular the investments are made and show the minimal discounted costs and an algorithm and the mechanism to select Paretto's optimal investments.

The problem of the oil-dissolved gas utilization remains urgent for Russian oil-and-gas sector. Tens of billions of the gas cubic meters continue to be burnt in flares, and the tendency of less utilization has been observed. In prospect, the oil-producing regions could have the significant socio-economic benefits by developing the oil-dissolved gas utilization industries as the negative ecologic effects would be minimized, the higher employment would be attained, the higher tax payments to budgets and more diversified economy would be and etc.

The author presents his theoretical considerations concerning the building of tools to manage efficiency of a regional enterprise which combine the potential of intersectoral and international sources of improvements and the different types of benchmarking.

The crisis has had a negative effect on small and medium business in the Republic of Kaskhstan. We analyze basic factors which impede the development of small and medium business in the Republic and the ways which would stimulate the development in this sector.

This paper examines the impacts of social capital on Aboriginal educational attainment in Canada, Australia, and New Zealand. We developed a synthesis looking for patterns and distilling the role of social capital. In writing our results we chose programs and policies of countries targeted that illustrated our synthesis.

It was revealed that a sharp increase in the top phytomass occurs in the groupings, formed at the pit walls, at the first stage: during active colonization of open territories by plants. At subsequent stages, an increase in the phytomass slows down, only the relations between the botanic groups comprising the phytomass changes substantially. In phytocenoses developing on dumps, an increase in the phytomass proceeds gradually at all the stages.

The structural features of packings of similar hard spheres in the vicinity of Bernal density corresponding to space occupancy ~0.64 have been studied. This is maximum density for disordered packings, which give way to crystallization at higher densities. The structure was analyzed using Delaunay simplices. Aggregates of simplices approximating a regular tetrahedron (polytetrahedra) in form have been studied. They have a high local density and various morphologies, but are incompatible with translation symmetry. Percolation analysis of these clusters was carried out. The "critical" nature of structural transformations at Bernal density is related with the appearance of percolation through tetrahedra. The closest disordered packings really have no significant nucleating seeds of crystal structures, as shown by a sensitive seed detection procedure. Their appearance and fast growth are observed after passing through Bernal density. The total fraction of the crystal phase increases monotonically with the density; the fcc and hcp structures appear in different proportions in the packings.

Crystalline solvates of synthetic tetraphenylporphyrin and its pyridinie metallocomplexes (Zn²⁺, Сu²⁺, Ni²⁺, Co²⁺, Mn³⁺, Fe³⁺) have been studied by thermogravimetric analysis. A comparative analysis of our thermochemical data and the literature XRD data was carried out for the pyridine complexes of metallotetraphenylporphyrins. It was found that the energy stability and structural characteristics of the pyridine complexes of metallotetraphenylporphyrins depended on the nature of the central metal ion. The pyridine complexes are stabilized by the direct metal−porphyrin π-dative macrocycle interaction and the increased residual positive charge on the central metal ion. The activation energies of thermal destruction of the pyridine complexes of metallotetraphenylporphyrins vary from 230 kJ·mol^-1 to 330 kJ·mol^-1, which is suggestive of the high kinetic stability of the complexes. For the molecular complexes under study, the limiting stage of destruction was found to be the chemical reaction itself, and the kinetic characteristics demonstrated the compensation effect, indicative of the similar mechanism of thermooxidative destruction of the pyridine complexes of metallotetraphenylporphyrins.

An analysis of the absorption and luminescence spectra and luminescence kinetics showed that in the Eu(DK)₃bpy_17-17 mesogenic adduct, 5,5′-diheptadecyl-2,2′-bipyridine (bpy_17-17) took an active part in the energy transfer to the Eu³⁺ ion. The interligand energy transfer from β-diketonate (DK) ligands was the major mechanism of excitation of bpy_17-17. Importantly, the interligand excitation complex considerably decreased radiation losses during the energy transfer from the absorbing DK ligands to the emitting level of Eu³⁺.

The most widespread procedure for the synthesis of oxyhydrate materials by the sol-gel method is fast alkaline hydrolysis of the soluble salts of heavy metals. Oversaturation of the mother solution during fast hydrolysis provides high dispersity and hence large surface area and availability of the sorption centers of the aggregates being formed. The number and accessibility of sorption centers is also determined by the structure of gel particles. At low hydrolysis rates, there are good possibilities for the structural rearrangements of gel elements, which leads to the formation of ordered supramolecular structures with developed surfaces. The structural characteristics of zirconium gels obtained by fast (5 s), slow (5 days), and ultraslow (5 mos.) alkaline hydrolysis of zirconium oxychloride were determined by derivatography combined with mass and IR spectroscopy (of thermolysis products), X-ray diffraction, IR spectroscopy (xerogels), NMR, electron microscopy, and other methods.

This paper presents the results of our study of molecular librations in liquid ortho-dichlorobenzene (C₆H₄Cl₂) and benzonitrile (C₆H₅CN) at room temperature. We used femtosecond polarization with recording of the optical Kerr effect (OKE). To analyze the libration response, we divided the total OKE signal into the constituent vibrational and rotational responses. Modeling the libration response, we determined the form of the distribution function of libration frequencies and performed qualitative analysis of the peculiarities of the local potentials of molecules.