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Izvestiya, Physics of the Solid Earth最新文献

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Deep Structure of the Baikal Rift Zone and Central Mongolia 贝加尔裂谷带和蒙古中部的深层结构
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700265
L. P. Vinnik, L. L. Delitsyn, L. I. Makeyeva, S. I. Oreshin
{"title":"Deep Structure of the Baikal Rift Zone and Central Mongolia","authors":"L. P. Vinnik,&nbsp;L. L. Delitsyn,&nbsp;L. I. Makeyeva,&nbsp;S. I. Oreshin","doi":"10.1134/S1069351324700265","DOIUrl":"10.1134/S1069351324700265","url":null,"abstract":"<p>The upper mantle and the transition zone of the Baikal rift zone (BRZ) are studied. The observations are analyzed from <i>P</i>-wave receiver functions. It is found that in the BRZ central and northeastern part, the <i>P</i>410<i>s</i> converted seismic phase is preceded by a precursory wave with negative polarity which is formed in the low <i>S</i>-wave velocity layer at a depth of 350–410 km. A similar precursory wave with low <i>S</i>-wave velocity and negative polarity is formed at a depth of 600–660 km. The low-velocity layers are interpreted as resulting from the hydration of wadsleyite and ringwoodite during the subduction of the Pacific lithosphere. A similar study of the mantle in Central Mongolia found no expected signs of hydration. The modeling of the lithosphere–asthenosphere system in Central Mongolia by joint inversion of the body wave receiver functions and surface wave dispersion curves reveals a very thin lithospheric lid beneath Khangai and a thick layered asthenosphere down to a depth of 200 km with a lithospheric inclusion between low-velocity layers.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"179 - 188"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Analysis and Unified Derivation of Reissner’s Equations for 2D Bending of Thick Plates and Timoshenko’s Equations for Bending of Beams 厚板二维弯曲的赖斯纳方程与梁弯曲的季莫申科方程的对比分析和统一推导
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700356
V. P. Trubitsyn, A. P. Trubitsyn
{"title":"Comparative Analysis and Unified Derivation of Reissner’s Equations for 2D Bending of Thick Plates and Timoshenko’s Equations for Bending of Beams","authors":"V. P. Trubitsyn,&nbsp;A. P. Trubitsyn","doi":"10.1134/S1069351324700356","DOIUrl":"10.1134/S1069351324700356","url":null,"abstract":"<p>Currently, bending deformations of lithospheric plates are calculated based on Kirchhoff’s theory of bending of thin plates, which was formulated about 170 years ago. This paper examines the possibility of refining these calculations based on the theory of bending of thick plates developed by Timoshenko and Reissner. A new unified derivation is presented of the Timoshenko equations for 2D bending of beams and the Reissner equations for bending of slabs by direct transformation of the general elasticity equations with a simple approximate replacement of power-cubic functions with effective linear ones. This allows a more detailed and clearer understanding of the differences between the equations and the sense of the simplifications made in these theories. By comparing the analytical solutions of the Timoshenko and Reissner equations with the known test analytical solutions of the exact elasticity equations, quantitative estimates of the accuracy of these theories are given.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"258 - 269"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Magnetotelluric Response Functions at the Cam Thuy Site, Northern Vietnam 越南北部 Cam Thuy 遗址的磁位响应函数分析
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-11 DOI: 10.1134/S1069351324700332
S. S. Starzhinskii
{"title":"Analysis of Magnetotelluric Response Functions at the Cam Thuy Site, Northern Vietnam","authors":"S. S. Starzhinskii","doi":"10.1134/S1069351324700332","DOIUrl":"10.1134/S1069351324700332","url":null,"abstract":"<p><b>Abstract</b>—During the magnetotelluric studies in North Vietnam, simultaneous Phase Roll Out from Quadrant effect was detected in the behavior of impedance phases <i>Z</i><sub><i>xy</i></sub> and <i>Z</i><sub><i>yx</i></sub> at one of the sounding sites, CTH, in the Cam Thuy district, Thanh Hoa province. The investigation of this phenomenon has shown that it is accompanied by negative (directed upwards) components of the Umov–Poynting vector of electromagnetic energy flux in the entire range of the recorded periods of magnetotelluric variations. This energy flux direction remains unchanged when the initial coordinate system is rotated by angles of 45° and 60°. Another characteristic feature of this phenomenon is an unusual behavior of the apparent resistivity curves: the apparent resistivity magnitudes increase starting from a period of 200 s up to a period of 10<sup>4</sup> s, and this increase occurs practically along the asymptote. The analysis of the magnetotelluric field polarization and phase tensor asymmetry parameter (skew angle) β has shown that the section is characterized by significant three-dimensional (3D) distortions which manifest themselves by β values ranging between 20° and 90°.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 2","pages":"287 - 299"},"PeriodicalIF":0.9,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141609095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of Thermal Processes Contribution to Seismicity Generation in the Junction Zone of the Chu Depression and the Kyrgyz Ridge, Northern Tien Shan 天山北部楚河凹陷与吉尔吉斯海脊交界地带地震生成的热过程贡献估算
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S106935132470023X
V. V. Spichak, A. G. Goidina
{"title":"Estimation of Thermal Processes Contribution to Seismicity Generation in the Junction Zone of the Chu Depression and the Kyrgyz Ridge, Northern Tien Shan","authors":"V. V. Spichak,&nbsp;A. G. Goidina","doi":"10.1134/S106935132470023X","DOIUrl":"10.1134/S106935132470023X","url":null,"abstract":"<p><b>Abstract</b>—The paper presents an attempt to estimate the contribution of thermal processes in the Earth’s crust to earthquake generation. As a case study, the seismically active junction zone of the Chu depression and Kyrgyz ridge of the Northern Tien Shan is considered. The analysis is based on the previously constructed models of temperature, petrophysical characteristics, and elastic moduli. The silica content model derived from seismic tomography data is used to build a lithotype model. The thermal conductivity model is constructed and used in conjunction with the temperature model to create a depth model of the heat flow density. The shear stress and thermoelastic stress models derived from density, elastic moduli, and temperature models are compared with the distribution of earthquake hypocenters in the region. The comparison suggests that on the scale of the seismically active junction zone of the Chu depression and the Kyrgyz ridge of the Northern Tien Shan, seismicity is mainly determined by thermomechanical effect induced by hot ascending flow of acid magma rising from the upper mantle beneath the Muyunkum–Narat median massif.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"104 - 121"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stress State of Mars’ and Venus’ Interior 火星和金星内部的应力状态
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700149
T. V. Gudkova, A. V. Batov
{"title":"Stress State of Mars’ and Venus’ Interior","authors":"T. V. Gudkova,&nbsp;A. V. Batov","doi":"10.1134/S1069351324700149","DOIUrl":"10.1134/S1069351324700149","url":null,"abstract":"<p><b>Abstract</b>—It is shown that most marsquakes epicenters are located in the zones of extension and fairly high shear stresses associated with deviation of the planet from hydrostatic equilibrium. In this paper, non-hydrostatic stresses in the interior of Venus are calculated for two types of models: an elastic model and a model with a lithosphere of variable thickness (150–500 km) covering a weakened layer that has partially lost its elastic properties. Numerical modeling of the system of elastic equilibrium equations for a gravitating planet is carried out with a step of 1° × 1° degrees in latitude and longitude down to a depth of 480 km, which is the first phase transition in the mantle. The boundary conditions of the problem are the topography and the gravitational field of the planet. In general, the level of nonhydrostatic stress on Venus is not very high. On the surface and in the crust, the highest shear stresses are observed in the region of the Maxwell Montes on Ishtar Terra. Beneath the Maxwell Montes, shear stresses in the crust reach 80 MPa and compressive stresses, 125–150 MPa, depending on the model. Tensile stresses around this area are about 20 MPa. The highest tensile stresses occur in the regions beneath such structures as Lavinia Planitia, Sedna Planitia, and Aino Planitia.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"92 - 103"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141530359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Paleomagnetic Dating of Lava Flows from the Avachinskii Volcano, Kamchatka 堪察加半岛阿瓦钦斯基火山熔岩流的古地磁测定法
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700204
V. I. Maksimochkin, L. I. Bazanova, Yu. V. Sleptsova
{"title":"Paleomagnetic Dating of Lava Flows from the Avachinskii Volcano, Kamchatka","authors":"V. I. Maksimochkin,&nbsp;L. I. Bazanova,&nbsp;Yu. V. Sleptsova","doi":"10.1134/S1069351324700204","DOIUrl":"10.1134/S1069351324700204","url":null,"abstract":"<p>The paleodirection and paleointensity of the geomagnetic field are determined from seven andesibasalt–basalt samples of three lava flows (L1–L3) from the Avachinskii (Avacha) volcano. Based on the sample from the recent lava flow TFE-50 (Tolbachik Fissure Eruption), the reliability of the Thellier–Coe method for geomagnetic field paleointensity determination is demonstrated: the deviation of the calculated <i>H</i><sub>an</sub> from the IGRF12 values is at most 3% with a quality factor <i>q</i> &gt; 13. The age of lava flows L1–L3 is refined using paleomagnetic data. Flows L1, L2 of the Molodoi Cone were formed in 1827 and 300–600 years ago, respectively, and the age of flow L3 at the crest of the somma is determined at 30–32 ka, which agrees with the known age estimate of the debris avalanche associated with the catastrophic destruction of the Avachinskii volcano 29 900 ± 37 900 <sup>14</sup>C years ago.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"32 - 48"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stability of Heavy Inclusions in the Earth’s Crust 地壳中重包裹体的稳定性
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700137
B. I. Birger
{"title":"Stability of Heavy Inclusions in the Earth’s Crust","authors":"B. I. Birger","doi":"10.1134/S1069351324700137","DOIUrl":"10.1134/S1069351324700137","url":null,"abstract":"<p><b>Abstract</b>—Stability of a heavy inclusion in the Earth’s upper crust is studied by the linear theory method for small perturbations. The presence of such inclusions with an increased density is associated with chemical inhomogeneity or phase transformations. The stability problem of a heavy elastic layer above a less dense elastic layer representing the lower crust and mantle lithosphere is solved. It is shown that such a system is stable: small initial perturbations produce low-amplitude oscillations. The corrections of oscillation frequencies for the density jump at the boundary between the layers are calculated. The changes introduced to the solution by the consideration of creep, which is present even in cold geomaterials, are discussed. Creep causes instability of heavy inclusions in the upper crust. However, due to the very high effective viscosity of the cold upper crust, this instability is of a formal nature, since it develops so slowly that heavy inclusions in the upper crust hardly change their position on timescales comparable to the age of the Earth.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"83 - 91"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Atmospheric Acoustic Resonance Induced by Earthquakes and Volcanic Eruptions on the Ionosphere and Geomagnetic Field 地震和火山爆发诱发的大气声共振对电离层和地磁场的影响
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700241
V. V. Surkov, V. A. Pilipenko
{"title":"The Effect of Atmospheric Acoustic Resonance Induced by Earthquakes and Volcanic Eruptions on the Ionosphere and Geomagnetic Field","authors":"V. V. Surkov,&nbsp;V. A. Pilipenko","doi":"10.1134/S1069351324700241","DOIUrl":"10.1134/S1069351324700241","url":null,"abstract":"<p><b>Abstract</b>—It has been observed that strong earthquakes and volcanic eruptions are sometimes followed by geomagnetic oscillations with frequencies of 3.5–4.0 mHz. This paper describes the theoretical study of the probable cause of these phenomena, which is related to the vertical acoustic resonance between the Earth’s surface and the thermosphere, produced by the propagation of the atmospheric wave corresponding to the acoustic branch generated by surface displacements. The propagation of two-dimensional (2D) harmonic acoustic wave is analyzed in a plane layered model of the atmosphere and ionosphere with oblique geomagnetic field. The altitude of the reflecting atmospheric layer corresponds to the region of a sharp temperature change in the vicinity of the thermosphere boundary ~80–90 km. The calculated fundamental resonant frequency is close to the observed oscillations. The obtained solution is used to calculate currents and electromagnetic perturbations in the atmosphere and ionosphere. Assuming thin-layer approximation for the ionospheric <i>E</i>-layer, we derive formulas describing the geomagnetic disturbances (GMD) in the ionosphere and on the Earth’s surface. The GMD spectrum has a sharp peak at the frequency corresponding to the acoustic resonance. According to the calculations, close to the resonance frequency, the power spectral density of GMD on the ground can reach 5–30 nT<sup>2</sup>/Hz, which is consistent with the results of ground-based measurements.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"49 - 58"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Probabilistic Location of Early Instrumental Earthquakes Based on Macroseismic and Instrumental Data 基于宏观地震和仪器数据的早期仪器地震概率定位
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700216
A. N. Morozov, V. E. Asming, N. V. Vaganova, Z. A. Evtyugina
{"title":"Probabilistic Location of Early Instrumental Earthquakes Based on Macroseismic and Instrumental Data","authors":"A. N. Morozov,&nbsp;V. E. Asming,&nbsp;N. V. Vaganova,&nbsp;Z. A. Evtyugina","doi":"10.1134/S1069351324700216","DOIUrl":"10.1134/S1069351324700216","url":null,"abstract":"<p><b>Abstract</b>—There are regions of moderate seismicity that have long lacked a dense network of seismic stations due to their sparse population, inaccessibility, and low economic levels. Characterization of earthquakes in such regions is typically limited to scarce macroseismic information available and data from only one or two seismic stations. Most often, the location of these earthquakes was based on the use of macroseismic information alone. We propose a method for probabilistic estimation of the location of such earthquakes based on a joint analysis of their macroseismic and instrumental data. The technique is implemented in the ProLoM program (Probabilistic Locator by Macroseismics). In this study, we test the performance of the method on a test earthquake of May 20, 1967 and present the analysis results for the earthquakes that in the north of the East European Platform that occurred on June 30, 1911 and January 13, 1939.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"153 - 161"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of Filtration and Scattered Fracture in Fractured Zones with Abnormally High Formation Pressure 地层压力异常高的断裂带中的过滤和分散断裂模型
IF 0.9 4区 地球科学
Izvestiya, Physics of the Solid Earth Pub Date : 2024-07-03 DOI: 10.1134/S1069351324700186
O. Ya. Izvekov, A. V. Konyukhov, Yu. N. Izvekova
{"title":"Modeling of Filtration and Scattered Fracture in Fractured Zones with Abnormally High Formation Pressure","authors":"O. Ya. Izvekov,&nbsp;A. V. Konyukhov,&nbsp;Yu. N. Izvekova","doi":"10.1134/S1069351324700186","DOIUrl":"10.1134/S1069351324700186","url":null,"abstract":"<p><b>Abstract</b>—A model of a double-porosity medium with damageable matrix subject to anomalously high formation pressure is discussed. It is assumed that damage in the matrix enhances mass transfer between the subsystems of the medium. The problem about the coupled fracture and fluid flow process in a fractured-porous medium in one-dimensional (1D) statement is solved numerically. The limited spatial extent of the zone of hydraulically conductive fractures is taken into account.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"60 1","pages":"162 - 172"},"PeriodicalIF":0.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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