Recent geodynamics of fault zones: faulting in real time scale

Кузьмин, Ю. О.

doi:10.5800/gt-2014-5-2-0135

Cited by 26 publications

(11 citation statements)

References 5 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Волны, так или иначе связанные с сейсмическим про цессом, получили различные названия при описании разными авторами, хотя суть интерпретируемых вол новых процессов различается не всегда и несущест венно. Чаще всего фигурируют наименования: волны сейсмоактивности [Mogi, 1973], Dволны, которые ге нерируются у полюсов и распространяются вдоль ме ридианов и служат триггерными механизмами для землетрясений на тройных соединениях плит [Gu berman, 1979], криповые волны напряжений [Savage, 1971; Saprygin, 1982, фронт деформаций волновой природы [Sholz, 1977], круговые волны [Zhadin, 1984], волны активизации разломов, деформационные волны [Bykov, 1999, 2000, 2008; Vilkovich et al, 1974; Kasahara, 1979; Gamburtsev, 1992; Sherman, Gorbuno va, 2008a, 2008b; Gershenzon et al, 2009; Sherman, 2009, деформационные автоволны [Kuz'min, 2004, 2012; Kuz'min, Zhukov, 2004, волны быстрых предвестников, тектонические волны [Elsasser, 1969; Kasahara, 1985; Dubrovsky, 1985; Nikolaevsky, Rama zanov, 1986; Malamud, Nikolaevsky, 1989; Nikolaevsky, 1986, 1996. Проблема воздействия дефор мационных волн как триггерных механизмов сейсми ческого процесса в короткопериодные интервалы вре мени весьма актуальна в современной геодинамике и сейсмологии.…”

Section: институт земной коры со ран иркутск россияunclassified

“…Подобные интенсивные движения Ю.О. Кузьмин [Kuz'min, 2004] назвал суперинтенсивными деформа циями земной поверхности в зонах разломов. Им же предложена классификация основных типов аномаль ного изменения современных движений земной по верхности в пределах зон или областей активного ди намического влияния разломов.…”

Section: деформационные волны в литосфере землиunclassified

“…8. Пример пространственновременной миграции деформационных процессов в разломных зонах Припятской впади ны [Kuz'min, 2004]. нах разломов, обусловлены внутренними источниками -параметрическими деформациями, то есть возмуще ниями внутренних параметров системы под воздейст вием очень малых сил.…”

Section: деформационные волны в литосфере землиunclassified

See 2 more Smart Citations

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Шерман¹

2013

Geodyn. Tectonophys.

View full text Add to dashboard Cite

Deformation waves as a trigger mechanism of seismic activity and migration of earthquake foci have been under discussion by researchers in seismology and geodynamics for over 50 years. Four sections of this article present available principal data on impacts of wave processes on seismicity and new data. The first section reviews analytical and experimental studies aimed at identification of relationships between wave processes in the lithosphere and seismic activity manifested as spaceandtime migration of individual earthquake foci or clusters of earthquakes. It is concluded that with a systematic ap proach, instead of using a variety of terms to denote waves that trigger seismic process in the lithosphere, it is reasonable to apply the concise definition of 'deformation waves', which is most often used in fact.The second section contains a description of deformation waves considered as the trigger mechanism of seismic activity. It is concluded that a variety of methods are applied to identify deformation waves, and such methods are based on various research methods and concepts that naturally differ in sensitivity concerning detection of waves and/or impact of the waves on seismic process. Epicenters of strong earthquakes are grouped into specific linear or arcshaped systems, which common criterion is the same time interval of the occurrence of events under analysis. On site the systems compose zones with similar time sequences, which correspond to the physical notion of moving waves (Fig. 9). Periods of manifestation of such waves are estimated as millions of years, and a direct consideration of the presence of waves and wave parameters is highly chal lenging. In the current stateoftheart, geodynamics and seismology cannot provide any other solution yet.The third section presents a solution considering record of deformation waves in the lithosphere. With account of the fact that all the earthquakes with М≥3.0 are associated with fault zones, a brief description of the method for assessment of spatial and temporal regularities in locations of earthquake epicentres in zones of dynamic influence of faults is provided. The method can be applied to estimate a dominating direction of movement of the epicentres, which corresponds to the phase velocity of the deformation wave disturbing metastability of the faultblock medium, leading to displacement of neigh bouring blocks and thus causing a seismic event (Fig. 14). By integration of vectors of migration of epicentres at active faults, it is possible to demonstrate a pattern of vectors of movements of the deformation waves in the seismic zones of the continental lithosphere (Fig. 18).Regional and transregional deformation waves are analyzed. For seismic zones of Central Asia, vectors of deformation waves are established, a scheme showing regional orientations of the waves is developed, and main wave parameters (length and time period) are estimated (Fig. 19). Three depth levels of deformation waves are distinguished: the whole lithosphere, the upper brittle ...

show abstract

Section: институт земной коры со ран иркутск россияunclassified

Section: деформационные волны в литосфере землиunclassified

See 1 more Smart Citation

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Шерман¹

2013

Geodyn. Tectonophys.

View full text Add to dashboard Cite

show abstract

“…Зоны разломов вмещают породы с «аномальны-ми физико-механическими, геолого-геофизически-ми, флюидо-геохимическими и другими характери-стиками» [Kuzmin, 2014]. Отличие этих характери-стик в разломах приводит к аномалиям разного знака в один и тот же период наблюдений (серия 3, рис.…”

Section: проявления медленных деформационных волн в геофизических поляхunclassified

Slow Deformation Waves in the Seismic Regime and Geophysical Fields at the Northern Margin of the Amur Plate

Trofimenko¹,

Быков

Grib³

2018

Geodin. tektonofiz.

View full text Add to dashboard Cite

Abstract:The interaction between the Amur, Pacific and Eurasian tectonic plates initiates seismic activity at the plate margins as well as in the plate periphery, as evidenced by intracontinental earthquakes. In the Amur plate, the dynamics of intercontinental seismicity is controlled by deformation wave fronts comprising a regular pattern of equidistant zones [Sherman, 2013]. According to [Trofimenko et al., 2015a[Trofimenko et al., , 2015b, maximum values of seismic activity in the range of magnitudes 2≤M≤4 also form a sequence of spatial cells in the form of seismic clusters from the east (Sakhalin -Sakh) to the west (the western boundary of the Baikal rift zone -BRZ ) (Fig. 1). One of the main characteristics of the seismic process is seismic activity migration given as sequential activation of seismogenic structures within the seismically active zones and on the global scale [Vikulin et al., 2012;Khain, Khalilov, 2008]. Direct observations show that crust deformation migrates from the Japan-Kuril-Kamchatka subduction zone towards the continent, and the estimated migration rates range from 10 to 140 km per year (e.g. [Ishii et al., 1978;Kasahara, 1979;Harada et al., 2003;Yoshioka et al., 2015]). In the Baikal and Amur regions (107-140°E), the fronts of deformation waves migrate at a rate of 5-20 km per year [Sherman, 2007[Sherman, , 2013. Considering the order of magnitude, this rate is comparable to the rates of crust deformation migration from the Japan-Kuril-Kamchatka zone (10-100 km per year). Our studies show that the sequential activation of the seismic clusters in the northeastern segment of the Amur plate (Sakh -TanLu -Al-St) occurs at a rate of 1000 km per year [Trofimenko et al., 2015a] (Fig. 1). In the meridional tectonic structures, the shifting chains of maximum seismicity values are sequentially replaced by minimum values (i.e. inversion zones). Based on the spatial cycles with the phase shift of the maximum seismic activity values at the rate of 1000 km per year, it is possible to represent the dynamics of seismicity in the form of a process initiated by long-period stress waves/deformations. According to [Mogi, 1968;Kasahara, 1979;Malamud, Nikolaevskii, 1989;Saprygin et al., 1997;Harada et al., 2003;Bykov, 2005Bykov, , 2014Sherman, 2007Sherman, , 2013Sherman, , 2014Milyukov et al., 2013], slow deformation waves of the global and regional scale are generated at the margins of lithospheric plates. Under this concept, the migration rate of seismic activity and the spatial extent of seismic cycles can be identified as the velocity and length of deformation waves. Using the data on seismicity of the most active region of the Baikal rift zone -the northwestern segment of the Amur plate, we have studied the periodic components of seismicity along the entire northern boundary of the Amur plate. An indirect evidence of the existence of deformation waves is the migration of anomalies of geophysical fields and its correlation with the migration of seismic activity. The space-time anomalies of the magnet...

show abstract

“…Можно от-метить известные работы Ю.О. Кузьмина [Kuzmin, 1996[Kuzmin, , 2009[Kuzmin, , 2014, а также сейсмологические наблюде-ния прежних лет (Ю.В. Ризниченко, Т.Г.…”

Section: Introductionunclassified

Slow slip events: parameters, conditions of occurrence, and future research prospects

Грантович¹,

Борисовна²,

Александрович³

et al. 2014

Geodyn. Tectonophys.

View full text Add to dashboard Cite

Slow slip events along faults and fractures are reviewed. Such inter-block displacements can be recorded at various scale levels and considered as transitional from quasi-stable (creep) to dynamic slip (earthquake). Such events include seismogenic slip along faults at velocities by one to three orders lower than those in case of 'normal' earthquakes, as well as aseismic slip cases. Discovering such events facilitates better understanding of how energy accumulated during deformation of the crust is released.Studying conditions and the evolution of transitional regimes can provide new important information on the structure and regularities of deformation in fault zones.Data from latest publications by different authors are consolidated, and the data analysis results are presented. Over 170 slow slip events are reviewed. Based on the consolidated data and modelling results obtained by the authors, relationships between parameters of the reviewed process are established, scale relations between the events are considered, and a firstapproximation analysis is conducted for impacts of geomaterial characteristics on various deformation regimes.Low-frequency earthquake foci and slow slip sites are most typically located in zones of transition from stable creep areas to seismogenic segments of the discontinuity (Fig. 3) It can be logically supposed that in such transitional zones, the interface has specific frictional properties providing for a regime that can be termed as 'conditionally stable slip'.The duration of slow deformation events is roughly proportional to the released seismic moment, while such a ratio is close to self-similarity in case of 'normal' earthquakes (Fig. 4). In case of slow slip, an area of the displaced section is larger by many factors than the corresponding value for an earthquake with the same seismic moment, while an average displacement amplitude along the fault is significantly smaller (Figures 5 and 6). Velocities of slip propagation along the fault strike are variable from a few hundred metres to 20-30 km/day. Slip velocities tend to decrease with scale (Fig. 7).Various slip modes were realized in laboratory experiments with slider model. Main specific features of slow slip along faults were simulated in the laboratory conditions. Possibilities for implementation of different deformation regimes were mainly determined by structure of simulated fault gouge. At equal Coulombic strength, small variations of structural characteristics, such as granulometric composition, grain shape, presence of fluid and its viscosity, may critically impact the deformation mode (Fig. 12).As evidenced by the data consolidated and analysed in this article, conditionally stable regimes of deformation of crustal discontinuities are a common phenomenon. Studies of such transitional deformation regimes seem promising for establishment of regularities in generation and evolution of dynamic events, such earthquakes, tectonic rock bursts, and slope events.

show abstract

Recent geodynamics of fault zones: faulting in real time scale

Cited by 26 publications

References 5 publications

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Deformation waves as a trigger mechanism of seismic activity in seismic zones of the continental lithosphere

Slow Deformation Waves in the Seismic Regime and Geophysical Fields at the Northern Margin of the Amur Plate

Slow slip events: parameters, conditions of occurrence, and future research prospects

Contact Info

Product

Resources

About