Izvestiya, Physics of the Solid Earth最新文献

Electrical Resistivity of ε-Fe at High Pressures of Stepwise Shock Compression ε-Fe在逐步冲击压缩高压下的电阻率

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040080

A. M. Molodets, A. A. Golyshev

引用次数: 0

The Response of Sandy and Clayey Soils to Weak and Strong Seismic Motions 砂土和粘性土对弱、强地震运动的响应

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040043

E. V. Deshcherevskaya, O. V. Pavlenko

{"title":"The Response of Sandy and Clayey Soils to Weak and Strong Seismic Motions","authors":"E. V. Deshcherevskaya, O. V. Pavlenko","doi":"10.1134/S1069351323040043","DOIUrl":"10.1134/S1069351323040043","url":null,"abstract":"<div><div><p><b>Abstract</b>—The response of sandy and clay subsurface soils, representing classes of non-cohesive and cohesive soils, during seismic motion of various intensities is analyzed based on the in situ observations—records by seismic vertical arrays of the Japanese strong motion network KiK-net. From a total of ~800 stations, five stations with sandy and five stations with clayey subsurface soils represented in the upper layers in their purest forms were selected for the analysis. For sandy and clayey stations, models of soil behavior during strong motion were constructed by the method of (Pavlenko and Irikura, 2003), showing vertical distributions of stresses and strains induced by strong motion in soil layers; and the behaviors were compared. Similar estimates of the amplification of seismic waves in sands and clays during weak motions and similar stress-strain relations describing the behavior of subsurface soils during moderate seismic motions are obtained. The liquefaction of sandy soils during strong motions (the 2011 Tohoku earthquake, <i>Mw</i> ~ 9.0) and the effects of extended seismic source (the directivity of seismic radiation) on the behavior of sandy and clayey soils and amplification of seismic waves are analyzed. Differences in the behavior of sandy and clayey soils are observed only during strong motions, namely, liquefaction occurs in sandy soils (when the groundwater level is about several meters from the surface), but never in clayey soils.</p></div></div>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"59 4","pages":"633 - 649"},"PeriodicalIF":1.0,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4242248","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

Migration of Displacement Anomalies on the Flanks of a Preparing Earthquake Source: A Swing Model 预备震源侧翼位移异常的偏移:一个摆动模型

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S106935132304002X

V. G. Bondur, I. A. Garagash, M. B. Gokhberg, D. A. Alekseev

引用次数: 0

Analysis of Contemporary Deformations of the North-Western Caucasus and Ciscaucasia Based on GNSS Data 基于GNSS数据的西北高加索和中高加索当代变形分析

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040110

G. M. Steblov, A. O. Agibalov, D. E. Beloborodov, V. A. Zaitsev, V. P. Perederin, F. V. Perederin, A. A. Sentsov, K. V. Fadeeva

引用次数: 0

Geoelectric Model of the Central Part of the Northern Caucasus and Its Fluid Saturation 北高加索中部地电模式及其流体饱和度

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040018

V. V. Belyavsky

{"title":"Geoelectric Model of the Central Part of the Northern Caucasus and Its Fluid Saturation","authors":"V. V. Belyavsky","doi":"10.1134/S1069351323040018","DOIUrl":"10.1134/S1069351323040018","url":null,"abstract":"<div><div><p><b>Abstract</b>—A series of magnetotelluric and seismic studies have been carried out on profiles covering more than two thousand kilometers within the North Caucasus region. The earlier interpretation of the magnetotelluric observations by means of one– and two–dimensional inversion and three–dimensional mathematical modeling software has helped to construct a series of sections and models which are viewed as test and starting ones for the construction of a three–dimensional geoelectric model of the region. The test models have been used to test how well the software for three–dimensional inversion of the impedance tensor components in the magnetotelluric sounding method can estimate the parameters of conducting blocks in the structures of the Greater Caucasus and the Scythian plate. In the resulting geoelectric model, constructed from the results of three–dimensional inversion of all impedance tensor components, the position of low–resistance blocks correlates with deep faults, volcanoes of various genesis, and seismically active zones characterized by the reduced velocity of seismic waves and their increased absorption. The electrical resistivity of low–resistance anomalies is explained by the degree of their saturation with the fluid water fraction. Its maximum concentration is found within the intersections of fault systems, flexural–rupture zones, and deep faults activated by tectonic processes.</p></div></div>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"59 4","pages":"565 - 585"},"PeriodicalIF":1.0,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4242251","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

Mapping of Magmatic Complexes Based on Hydromagnetic Surveys in the Barents Sea Region 基于磁测的巴伦支海地区岩浆杂岩填图

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040079

I. V. Lygin, D. A. Arutyunyan, T. B. Sokolova, K. M. Kuznetsov, K. V. Krivosheya

引用次数: 0

Seismotectonic Changes before the M = 9.1 Sumatra Earthquake of December 26, 2004 2004年12月26日苏门答腊M = 9.1地震前的地震构造变化

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040109

G. A. Sobolev, I. N. Migunov

引用次数: 0

Changes in Thermal Conductivity of Rocks in the Lithosphere of the West Siberian Basin in the Area of the Tyumen SG-6 Well 秋明SG-6井地区西西伯利亚盆地岩石圈岩石热导率变化

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040067

Yu. I. Galushkin

{"title":"Changes in Thermal Conductivity of Rocks in the Lithosphere of the West Siberian Basin in the Area of the Tyumen SG-6 Well","authors":"Yu. I. Galushkin","doi":"10.1134/S1069351323040067","DOIUrl":"10.1134/S1069351323040067","url":null,"abstract":"<div><div><p><b>Abstract</b>—Numerical reconstructions of the thermal regime of the lithosphere of the West Siberian basin in the Koltogor-Urengoi graben in the vicinity of the Tyumen SG-6 superdeep well are used to analyze the depth distribution of thermal conductivity of basin rocks. Five depth intervals that differ in the pattern of changes in thermal conductivity of rocks are distinguished: permafrost zone, sedimentary section below this zone, zone of anomalous decompaction of rocks, consolidated crust, and mantle. The algorithms for calculating thermal conductivity are considered, and the main factors affecting the depth changes of the latter are determined for each of the five intervals. A sharp decrease in thermal conductivity of rocks at the base of the sedimentary cover and at the basement top in the vicinity of the SG-6 well is associated with rock decompaction due to tectonic fracturing and hydrothermal erosion. The analysis suggests that the stationarity conditions of the process are not observed in optical scanning thermal conductivity measurements and, therefore, this method may overestimate the true thermal conductivity of rocks.</p></div></div>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"59 4","pages":"622 - 632"},"PeriodicalIF":1.0,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4242241","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

Dissipative Seismicity for Hydrocarbon Reservoir Parameter Evaluation 耗散地震活动性用于油气藏参数评价

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040031

I. Ya. Chebotareva, E. D. Rode

{"title":"Dissipative Seismicity for Hydrocarbon Reservoir Parameter Evaluation","authors":"I. Ya. Chebotareva, E. D. Rode","doi":"10.1134/S1069351323040031","DOIUrl":"10.1134/S1069351323040031","url":null,"abstract":"<p>The natural seismic background of the Earth and its deep emission component are a form of dissipation of energy of geodynamic processes. The methods of studying the seismic background as a signal generated by an open complex non-linear system (the Earth’s crust) can be grouped under one branch—dissipative seismicity. In this paper, one of such methods, namely, the thermodynamic indicator of the state of rocks, is used for the remote evaluation of the local productivity of the reservoir on the hydrocarbon deposit site. The thermodynamic indicator was created using the Klimontovich entropy and yields quantitative estimates of the local disequilibrium of rocks associated with the activity of geophysical processes. We revealed monotonic, near-linear relationship between the thermodynamic indicator values calculated using the seismic background records and the cumulative thickness of productive layers in the wells in close proximity to recording points. The thermodynamic indicator is calculated assuming that there is a sliding time window threshold that must be taken empirically. The obtained results show that the thermodynamic indicator can be effectively used for outlining the deposit boundaries and choosing the potentially most productive well drilling points by extrema in the indicator value field.</p>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"59 4","pages":"650 - 661"},"PeriodicalIF":1.0,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4242237","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

Corrections to the Theory of Elastic Bending of Thin Plates for 2D Models in Reissner’s Approximation 二维模型薄板弹性弯曲理论在Reissner近似中的修正

IF 1 4区地球科学

Izvestiya, Physics of the Solid Earth Pub Date : 2023-08-06 DOI: 10.1134/S1069351323040122

A. P. Trubitsyn, V. P. Trubitsyn

{"title":"Corrections to the Theory of Elastic Bending of Thin Plates for 2D Models in Reissner’s Approximation","authors":"A. P. Trubitsyn, V. P. Trubitsyn","doi":"10.1134/S1069351323040122","DOIUrl":"10.1134/S1069351323040122","url":null,"abstract":"<div><div><p><b>Abstract</b>—Elastic bending stresses and deformations in the lithosphere are usually calculated based on the Kirchhoff–Love theory for thin plates. The criterion for its applicability is the smallness of the ratio of plate thickness to plate length. In oceanic plates, due to the buoyancy force of the mantle, the main deformations are not uniformly distributed along the plate but concentrate in the vicinity of the subduction zone. Therefore, the effective length of the bending part of the plate is a few fractions of its actual length, and the plate thinness criterion is partially violated. In this paper, we analyze the possibility of applying thick plate bending equations. The existing variational theories of 3D bending of thick plates are substantially more complicated than the Kirchhoff–Love theory, as they involve solving three differential equations instead of one, and have limited application due to their complexity. Since geophysical applications frequently use 2D models, in this paper we analyze in detail the potential and accuracy of the thick plate bending theory for 2D models. After the conversion to the 2D plane strain and plane stress approximation, the original 3D Reissner thick plate bending equations are written out in the form similar to the Kirchhoff equations with additive corrections and are supplemented with the explicit formulas for longitudinal displacement. The comparison of the analytical solutions of the 2D Reissner equations with the exact solutions shows that the 2D approximation only provides a correction for the plate deflection function. However, this correction refines the Kirchhoff–Love theory by almost an order of magnitude. At the same time, the solution of the equations in this case turns out to be almost as simple as the solution of the thin plate equations.</p></div></div>","PeriodicalId":602,"journal":{"name":"Izvestiya, Physics of the Solid Earth","volume":"59 4","pages":"497 - 509"},"PeriodicalIF":1.0,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4237845","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