Field of tectonic stresses from focal mechanisms of earthquakes and recent crustal movements from GPS measurements in China

Петров, В. А.; Anfu, Niu; Смирнов, В. Б.; Mostryukov, A. O.; Li, Zhixiong; Пономарев, А. В.; Jiang, Zhuoran; Xuhui, Shen

doi:10.1134/s1069351308100121

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…In this study, we also compared the results of the fractal analysis of the fault network with the data on the recent stress-strain state of the crust derived from different methods, mainly from the analysis and interpretation of the data obtained by different types of remote sensing of the Earth reported by other researchers. The relations between the stress fields and deformations restored using seismic and satellite data were considered in different publications [e.g., Lukhnev et al, 2010;Petrov et al, 2008].…”

Section: State Of the Crustmentioning

confidence: 99%

Characteristics of Self‐similarity of Seismicity and the Fault Network of the Sikhote Alin Orogenic Belt and the Adjacent Areas

Захаров¹,

Диденко²,

Гильманова

et al. 2019

Geodin. tektonofiz.

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We performed a comprehensive analysis of the characteristics of self‐similarity of seismicity and the fault network within the Sikhote Alin orogenic belt and the adjacent areas. It has been established that the main features of seismicity are controlled by the crustal earthquakes. Differentiation of the study area according to the density of earthquake epicenters and the fractal dimension of the epicentral field of earthquakes (De) shows that the most active crustal areas are linked to the Kharpi‐Kur‐Priamurye zone, the northern Bureya massif and the Mongol‐Okhotsk folded system. The analysis of the earthquake recurrence plot slope values reveals that the highest b‐values correlate with the areas of the highest seismic activity of the northern part of the Bureya massif and, to a less extent, of the Mongol‐Okhotsk folded system. The increased fractal dimension values for the fault network (Df) correlate with the folded systems (Sikhote Alin and Mongol‐Okhotsk), while the decreased values conform to the depressions and troughs (Middle Amur, Uda and Torom). A comparison of the fractal analysis results for the fault network with the recent stress‐strain data gives evidence of their general confineness to the contemporary areas of intense compression. The correspondence between the field of the parameter b‐value for the upper crustal earthquakes and the fractal dimension value for the fault network (Df) suggests a general consistency between the self‐similar earthquake magnitude (energy) distribution and the fractal distribution of the fault sizes. The analysis results demonstrate that the selfsimilarity parameters provide an important quantitative characteristic in seismotectonics and can be used for the neotectonic and geodynamic analyses.

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Section: State Of the Crustmentioning

confidence: 99%

Characteristics of Self‐similarity of Seismicity and the Fault Network of the Sikhote Alin Orogenic Belt and the Adjacent Areas

Захаров¹,

Диденко²,

Гильманова

et al. 2019

Geodin. tektonofiz.

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“…Гущенко, была представлена в ра ботах [Petrov et al, , 2008. Некоторое отличие ре зультатов в сравнении с работой было вызвано не столько различием методик реконст рукции, сколько определенными расхождениями ис ходных сейсмологических данных о механизмах оча гов землетрясений.…”

Section: сейсмологические данные и история вопросаunclassified

“…Гу щенко [Gushchenko, 1979], используемом в работе [Petrov et al, , 2008, то МКА следует рассматри вать как его развитие. В МКА содержится целый ряд положений кинематического метода: однородные вы борки механизмов очагов землетрясений; возможность несовпадения на плоскости разрыва касательных на пряжений, действовавших до его активизации с на правлением относительного смещения бортов и др.…”

Section: сейсмологические данные и история вопросаunclassified

“…В исследованиях [Petrov et al, 2008] также получе ны данные о наличии в коре западного сектора Тибета горизонтального растяжения. Основные же области коры Тибета здесь представлены геодинамическим типом напряженного состояния в виде горизонтально го сжатия со сдвигом и октаэдрическим типом (ось на зенит равноудалена от всех осей главных напряже ний).…”

Section: а бunclassified

“…Коре Памира в этой реконструкции в основном отвечает октаэдрический геодинамический тип напря женного состояния. Такие отличия в результатах от наших данных связаны не с особенностями исполь зуемого в работе [Petrov et al, 2008] метода, а с раз ным типом исходных данных в виде каталога меха низмов очагов землетрясений. В этой работе ее авторы выполнили самостоятельный анализ знаков первых вступлений в Pволне при создании своего каталога.…”

Section: а бunclassified

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The field of recent tectonic stresses in Central and South-Eastern Asia

Ребецкий¹,

Алексеев

2014

Geodyn. Tectonophys.

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The publication presents results of the study aimed at reconstruction of recent crustal stresses for Central and South Eastern Asia with application of the method of cataclastic analysis of displacements caused by ruptures, which was proposed by Yu.L. Rebetsky. Two sources of seismic data were referred to: (1) the catalog comprising data from publications covering the period from 1904 to 1992, and (2) the Global Centroid Moment Tensor (CMT) Database of earthquake mechanisms (http://earthquake.usgs.gov/eqarchives/sopor), which covers the period from 1978 to 2010. The method of cataclastic analysis in its earliest version was applied in 1996 and 1997 when seismic data from the first catalog were analyzed, and it yielded only parameters of stress ellipsoids; the reconstructions were published in a RussianChinese journal (it does not exist now). In this paper, these reconstructions are presented in new graphical formats of GIS. Data from the Global CMT Database were analyzed by the method of cataclastic analysis in the new revision with application of its stages 1 and 2. Based on the calcula tions, orientations of axes of principal stresses, types of ellipsoids, correlations between spherical and deviatoric components of stress tensors, and reduced stresses were determined. The two sets of reconstructions are compared in this paper. The cata log of earthquake focal mechanisms for the period from 1904 to 1992 consolidated information provided by different authors, and thus focal data for many seismic events were highly inconsistent; therefore, the reliability of reconstructions based on such data seems to be lower than that on the basis the Global CMT Database for the period from 1978 to 2010. Some of the reconstructed stress tensor parameters are mapped. For the areas which data are given in the Global CMT Database and con sidered as more reliable, mapping is based on stress parameters calculated from such data. For the areas that are not covered by the Global CMT Database, reconstructions based on the first catalog are mapped. In the maps showing consolidated pat terns of the state of stresses, spacious areas of horizontal extension of the crust in Tibet are clearly identified. In the south, such areas are bordered by regions of horizontal compression of the crust in Himalaya; in the north and northeast, they are bordered by regions of horizontal shear of the crust in East Kunlun. According to results of calculations at stage 2 of the method of cataclastic analyses, the crust in the central part of Tibet is subject to intensive confining pressure and lateral com pression that is reduced in the neighboring regions. The crust in the southern and northern parts of Pamir is also subject to horizontal extension and shear. Regions of horizontal compression are located to the north, west and south of Pamir. Regula tions of the field of recent tectonic stresses of Tibet and Pamir, which are revealed in this study, can be explained by the con cept of 'tectonic spreading' of these regions due to gravity, which caus...

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Pattern of Global Crustal Stresses of the Earth

Rebetskiy

2020

Geotecton.

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Field of tectonic stresses from focal mechanisms of earthquakes and recent crustal movements from GPS measurements in China

Cited by 5 publications

References 3 publications

Characteristics of Self‐similarity of Seismicity and the Fault Network of the Sikhote Alin Orogenic Belt and the Adjacent Areas

Characteristics of Self‐similarity of Seismicity and the Fault Network of the Sikhote Alin Orogenic Belt and the Adjacent Areas

The field of recent tectonic stresses in Central and South-Eastern Asia

Pattern of Global Crustal Stresses of the Earth

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