Application of laser strainmenters to the study of earthquake physics     

Grigory I. Dolgikh  Mstislav N. Dubrov  Stanislav G. Dolgikh  Sergei N. Kovalev  Vladimir V. Ovcharenko  Egor A. Savvin  Vladimir A. Chupin  Vyacheslav A. Shvets  Sergei V. Yakovenko 《Acta Geophysica》2006,54(2):187-197

The paper considers possibilities of applying laser strainmeters for the study of earthquake physics. One of laser strainmeters is described. A high efficiency of using the laser strainmeters for the study of earthquakes and their precursors is shown. In records of the spaced laser strainmeters, anomalous deformations propagating from the east to the west with the speed comparable with that of migration of earthquakes were found.  相似文献   

Features of the Influence of Weather Conditions on the Deformation Processes of the Upper Layer of the Earth’s Crust     

Dolgikh  G. I.  Yakovenko  S. V.  Stepochkin  I. E. 《Doklady Earth Sciences》2022,507(1):920-924

Doklady Earth Sciences - The influence of the temperature and moisture content of the near-surface soil layer on variations of the barodeformation interaction of the boundary layer of the...  相似文献   

Thermodynamics of arsenates,selenites, and sulfates in the oxidation zone of sulfide ores. X. thermal stability and dehydration features of synthetic analogs of the cobaltomenite–ahlfeldite solid solution series     

M. V. Charykova  E. L. Fokina  V. G. Krivovichev  O. S. Yakovenko  E. V. Klimova  V. V. Semenova 《Geology of Ore Deposits》2015,57(7):570-578

The aim of this study is the experimental investigation of the synthetic analogs of cobaltomenite, CoSeO₃ ? 2H₂O, ahlfeldite, NiSeO₃ ? 2H₂O, members of the cobaltomenite–ahlfeldite solid solution series (Ni _x Co_1–x )SeO₃ ? 2H₂O, and singularities of their dehydration and dissociation. The intermediate members of the cobaltomenite (CoSeO₃ ? 2H₂O)–ahlfeldite (NiSeO₃ ? 2H₂O) series have been synthesized and studied with a combination of X-ray diffraction, scanning electron microscopy, and the simultaneous application of thermogravimetry (TG) and differential scanning calorimetry (DSC) within the temperature range from 25 to 640°C. The complete solid solution series corresponds to the monoclinic space group P2₁/n. Unit-cell dimensions decrease in all crystallographic directions as the amount of Ni increases. The angle β increases from 98.82(1) (cobaltomenite) to 99.05(1)° (ahlfeldite). It has been established that CoSeO₃ ? 2H₂O and NiSeO₃ ? 2H₂O dehydrate at 120–340°C through two stages apparently corresponding, to the formation of intermediate hydrated species CoSeO₃ ? H₂O and NiSeO₃ ? 1/3H₂O. The reaction enthalpies for each dehydration stage of CoSeO₃ ? 2H₂O and NiSeO₃ ? 2H₂O have been determined. Changes of the unit-cell dimensions and dehydration temperatures are rationalized in terms of the Co and Ni site occupancy in the structure of the cobaltomenite–ahlfeldite solid-solution series members.  相似文献   

Self-Generating Processes in the System Atmosphere–Earth’s Crust     

Dolgikh  G. I.  Budrin  S. S.  Yakovenko  S. V. 《Doklady Earth Sciences》2020,490(2):97-99

Doklady Earth Sciences - Based on analysis of experimental data, the self-generating processes in the system atmosphere–Earth’s crust are considered, in which energy is sequentially...  相似文献   

The oxygen isotopic composition as an indicator of the genesis of “Basaltic” corundum     

S. V. Vysotsky  V. V. Yakovenko  A. V. Ignat’ev  A. A. Karabtsov 《Russian Journal of Pacific Geology》2009,3(1):64-68

This paper reports an oxygen isotopic study of corundums and associated minerals from the Yogo lamprophyres (Montana, US), plagioclase-corundum inclusions in alkali basalt (Tunkin depression, Russia), and from modern alluvium of Podgelbanochnyi alkaline basaltic volcano (Primorye, Russia). It is shown that all sapphires genetically related to mafic magmatic rocks have a similar oxygen isotopic composition (the variations of δ¹⁸O are within 2.5‰) with most values plotting between +4.5 and +7.0‰ SMOW. The oxygen isotopic ratios in the associated minerals (olivines, pyroxenes, mica, and others) and host rocks are plotted in the same interval. This indicates that the sapphire crystallized during evolution of the parental mafic magma. However, there are xenogenic corundums, which were only transported by basaltic magma to the Earth’s surface. They have a sharply distinct oxygen isotopic composition, which suggests their disequilibrium with the host lavas, and, correspondingly, a different genetic nature.  相似文献   

Thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide ores: VI. Solubility of synthetic analogs of ahlfeldite and cobaltomenite at 25°C     

M. V. Charykova  V. G. Krivovichev  O. S. Yakovenko  V. V. Semenova  K. N. Semenov  W. Depmeier 《Geology of Ore Deposits》2012,54(8):638-646

The understanding of the mechanisms of the selenium behavior under near-surface conditions is an urgent problem of modern mineralogy and geochemistry, and is very important for solving environmental problems. The objective of this study is to synthesize analogs of ahlfeldite and cobaltomenite and to estimate their solubility in water. These analogs have been synthesized by mixing aqueous solutions of cobalt and nickel nitrates, respectively, and sodium selenite acidified with a solution of nitric acid. The obtained samples have been identified by X-ray diffraction and IR spectroscopy. The solubility has been determined by the isothermal saturation method in ampoules at 25°C, while the solubility products have been calculated using the Geochemist’s Workbench (GMB 7.0) software package. The solubility products of ahlfeldite and cobaltomenite are 10^?9.20 and 10^?9.44, respectively. The Eh-pH diagrams were calculated and plotted with the GMB 7.0 software package. The Eh-pH diagrams of the Ni-Se-H₂O and Co-Se-H₂O systems have been calculated for the average contents of these elements in underground water and their contents in acidic water of the oxidation zone of sulfide deposits. The formation of ahlfeldite and cobaltomenite under near-surface conditions is discussed.  相似文献   

Thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide Ores: Part VII. Solubility of synthetic analogs of erythrite and annabergite at 25°C     

M. V. Charykova  V. G. Krivovichev  O. S. Yakovenko  V. V. Semenova  K. N. Semenov  W. Depmeier 《Geology of Ore Deposits》2013,55(7):525-531

Understanding the mechanisms of arsenic’s behavior under near-surface conditions is one of the actual problems of contemporary mineralogy and geochemistry and is important for solving environmental problems. The aim of this study is to synthesize analogs of erythrite and annabergite and to investigate their solubility in water. These phases have been synthesized by the boiling-dry of aqueous solutions of cobalt and nickel nitrates mixed with sodium hydroarsenate alkalized with NaOH. The samples obtained have been identified with electron microprobe, X-ray diffraction, and IR spectroscopy. Solubility has been determined by the isothermal saturation method in ampoules at 25°C. The solubility has been calculated using the Geochemist’s Workbench (GMB 7.0) software package. The measured solubilities of erythrite and annabergite are 10^?35.76 and 10^?36.43, respectively. Eh-pH diagrams were calculated and plotted using the GMB 7.0 software package. The database comprises the thermodynamic parameters of 46 elements, 47 main particles, 48 redox pairs, 552 particles in solution, 624 solid phases, and 10 gases. The Eh-pH diagrams of the Ni-As-H₂O and Co-As-H₂O systems were plotted for the average contents of these elements in the acidic waters in the oxidation zones of sulfide deposits. The formation of erythrite and annabergite under near-surface conditions is discussed.  相似文献   

Free oscillations of water level in the Posyet Gulf bays (the Sea of Japan)     

G. I. Dolgikh  S. S. Budrin  S. G. Dolgikh  A. A. Plotnikov  V. A. Chupin  V. A. Shvets  S. V. Yakovenko 《Russian Meteorology and Hydrology》2016,41(8):559-563

The results of the experiments on the registration of hydrosphere pressure variations are analyzed. The experiments were conducted in 2011, 2012, and 2014 using the laser meter ofhydrosphere pressure variations and the laser hydrophone in some bays of the Posyet Gulf in the Sea of Japan. Basic attention is given to the wind waves and fundamental modes of free oscillations in the bays.  相似文献   

Peculiarities of the Tectonomagmatic Processes in the Interaction Area between the Icelandic Plume and the Bight Transform Fault (North Atlantic)     

Skolotnev  S. G.  Peyve  A. A.  Sanfilippo  A.  Ivanenko  A. N.  Ligi  M.  Veklich  I. A.  Petracchini  L.  Basch  V.  Kuleshov  D. A.  Ferrando  C.  Dobrolyubov  V. N.  Sani  C.  Shkittin  N. A.  Bickert  M.  Dokashenko  S. A.  Muccini  F.  Yakovenko  E. S.  Palmiotto  C.  Cuffaro  M. 《Doklady Earth Sciences》2022,504(1):233-239

Doklady Earth Sciences - Geological and geophysical data collected during the 53rd cruise of the R/V Akademik Sergey Vavilov are presented. It is shown that the lateral distribution of the...  相似文献   

Interaction of low-frequency hydroacoustic waves with wind sea waves     

Dolgikh  G. I.  Plotnikov  A. A.  Dolgikh  S. G.  Chupin  V. A.  Yakovenko  S. V. 《Doklady Earth Sciences》2010,430(1):104-107

On the basis of experimental data on hydrospheric pressure variations, obtained with the use of a laser hydrophone and laser gauge of hydrospheric pressure variations, while hydroacoustic radiators were running, generating hydroacoustic waves at frequencies of about 32, 245, and 421 Hz in water, it was established that there is no modulating action of wind sea waves on the propagating hydroacoustic signals along the “radiator-receiver” trace, within the limits of experimental error and the processing methods used.  相似文献