4 research outputs found
ΠΠΠΠΠΠΠΠΠΠΠ’Π Π―Π‘ΠΠΠΠ― ΠΠ ΠΠΠΠΠΠΠΠ¬Π―: ΠΠΠ’ΠΠΠ« Π Π ΠΠΠ£ΠΠ¬Π’ΠΠ’Π« ΠΠΠ’ΠΠ ΠΠΠΠΠΠ―
In the Pribaikalie and adjacent territories, seismogeological studies have been underway for almost a half of the century and resulted in discovery of more than 70 dislocations of seismic or presumably seismic origin. With commencement of paleoseismic studies, dating of paleo-earthquakes was focused on as an indicator useful for long-term prediction of strong earthquakes. V.P. Solonenko [Solonenko, 1977] distinguished five methods for dating paleoseismogenic deformations, i.e. geological, engineering geological, historico-archeological, dendrochronological and radiocarbon methods. However, ages of the majority of seismic deformations, which were subject to studies at the initial stage of development of seismogeology in Siberia, were defined by methods of relative or correlation age determination.Since the 1980s, studies of seismogenic deformation in the Pribaikalie have been widely conducted with trenching. Mass sampling, followed with radiocarbon analyses and definition of absolute ages of paleo-earthquakes, provided new data on seismic regimes of the territory and rates of and recent displacements along active faults, and enhanced validity of methods of relative dating, in particular morphometry. Capacities of the morphometry method has significantly increased with introduction of laser techniques in surveys and digital processing of 3D relief models.Comprehensive seismogeological studies conducted in the Pribaikalie revealed 43 paleo-events within 16 seismogenic structures. Absolute ages of 18 paleo-events were defined by the radiocarbon age determination method. Judging by their ages, a number of dislocations were related with historical earthquakes which occurred in the 18th and 19th centuries, yet any reliable data on epicenters of such events are not available. The absolute and relative dating methods allowed us to identify sections in some paleoseismogenic structures by differences in ages of activation and thus provided new data for more accurate definitions of epicenters and magnitudes of the paleo-earthquakes. In some cases, it was revealed that neighboring dislocations of seismogenic structures, which were previously considered independent, had been subject to simultaneous opening.The article presents a new approach to selecting regression equations to estimate paleo-magnitudes with regard to specific geodynamic conditions as well as to levels of available knowledge on seismodislocations and reliability of available data parameters.ΠΠ° ΠΏΠΎΠ»ΡΠ²Π΅ΠΊΠΎΠ²ΡΡ ΠΈΡΡΠΎΡΠΈΡ ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π² ΠΡΠΈΠ±Π°ΠΉΠΊΠ°Π»ΡΠ΅ ΠΈ ΡΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ½ΡΡ
ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΡΡ
Π² Π·ΠΎΠ½Π°Ρ
Π°ΠΊΡΠΈΠ²Π½ΡΡ
ΡΠ°Π·Π»ΠΎΠΌΠΎΠ² Π²ΡΡΠ²Π»Π΅Π½Ρ Π±ΠΎΠ»Π΅Π΅ 70 Π΄ΠΈΡΠ»ΠΎΠΊΠ°ΡΠΈΠΉ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΠ»ΠΈ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎΒ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠΎΠΈΡΡ
ΠΎΠΆΠ΄Π΅Π½ΠΈΡ. Π‘ Π½Π°ΡΠ°Π»Π° ΠΏΠ°Π»Π΅ΠΎΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π²ΠΎΠ·ΡΠ°ΡΡΠ° ΠΏΠ°Π»Π΅ΠΎΠ·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ ΡΠ΄Π΅Π»ΡΠ»ΠΎΡΡ ΠΎΡΠΎΠ±ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΠΊΠ°ΠΊ ΠΎΠ΄Π½ΠΎΠΌΡ ΠΈΠ· ΠΏΡΠΈΠ·Π½Π°ΠΊΠΎΠ² Π΄ΠΎΠ»Π³ΠΎΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ³Π½ΠΎΠ·Π° ΡΠΈΠ»ΡΠ½ΡΡ
Π·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ. Π.Π. Π‘ΠΎΠ»ΠΎΠ½Π΅Π½ΠΊΠΎ [Π‘ΠΎΠ»ΠΎΠ½Π΅Π½ΠΊΠΎ, 1977] Π²ΡΠ΄Π΅Π»ΡΠ» ΠΏΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² Π΄Π°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠ°Π»Π΅ΠΎΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅Π½Π½ΡΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ: Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ, ΠΈΠ½ΠΆΠ΅Π½Π΅ΡΠ½ΠΎ-Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ, ΠΈΡΡΠΎΡΠΈΠΊΠΎ-Π°ΡΡ
Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ, Π΄Π΅Π½Π΄ΡΠΎΡ
ΡΠΎΠ½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈ ΡΠ°Π΄ΠΈΠΎΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΡΠΉ. ΠΠ΄Π½Π°ΠΊΠΎ Π²ΠΎΠ·ΡΠ°ΡΡ Π±ΠΎΠ»ΡΡΠΈΠ½ΡΡΠ²Π° ΡΠ΅ΠΉΡΠΌΠΎΠ΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ, ΠΈΠ·ΡΡΠ°Π΅ΠΌΡΡ
Π½Π° Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΌ ΡΡΠ°ΠΏΠ΅ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅ΠΎΠ»ΠΎΠ³ΠΈΠΈ Π² Π‘ΠΈΠ±ΠΈΡΠΈ, Π±ΡΠ» ΠΏΠΎΠ»ΡΡΠ΅Π½ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ»ΠΈ ΠΊΠΎΡΡΠ΅Π»ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π΄Π°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ.Π‘ ΠΊΠΎΠ½ΡΠ° 80-Ρ
Π³ΠΎΠ΄ΠΎΠ² XX ΡΡΠΎΠ»Π΅ΡΠΈΡ Π² ΠΡΠΈΠ±Π°ΠΉΠΊΠ°Π»ΡΠ΅ Π΄Π»Ρ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅Π½Π½ΡΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ ΡΡΠ°Π» ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡΡΡ ΡΡΠ΅Π½ΡΠΈΠ½Π³ β ΠΌΠ΅ΡΠΎΠ΄ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠ΅ΠΉΡΠΌΠΎΠ΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ Π² ΡΠ°Π·ΡΠ΅Π·Π°Ρ
ΠΊΠ°Π½Π°Π². ΠΠ°ΡΡΠΎΠ²ΡΠΉ ΠΎΡΠ±ΠΎΡ ΠΏΡΠΎΠ± Π½Π° ΡΠ°Π΄ΠΈΠΎΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΡΠΉ Π°Π½Π°Π»ΠΈΠ· ΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΠ΅ Π°Π±ΡΠΎΠ»ΡΡΠ½ΡΡ
Π²ΠΎΠ·ΡΠ°ΡΡΠΎΠ² ΠΏΠ°Π»Π΅ΠΎΠ·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΈ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΠΏΠΎΠ»ΡΡΠΈΡΡ Π΄Π°Π½Π½ΡΠ΅ ΠΎ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅ ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠΈ, ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΡΠΊΠΎΡΠΎΡΡΡΡ
ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎ Π°ΠΊΡΠΈΠ²Π½ΡΠΌ ΡΠ°Π·Π»ΠΎΠΌΠ°ΠΌ, Π½ΠΎ ΠΈ ΠΏΠΎΠ²ΡΡΠΈΡΡ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ Π΄Π°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ, ΠΈ ΠΏΡΠ΅ΠΆΠ΄Π΅ Π²ΡΠ΅Π³ΠΎ ΠΌΠΎΡΡΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ. Π‘Π°ΠΌΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΠΌΠΎΡΡΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠ΅ΡΠΎΠ΄Π° Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π²ΠΎΠ·ΡΠΎΡΠ»ΠΈ Ρ Π²Π½Π΅Π΄ΡΠ΅Π½ΠΈΠ΅ΠΌ Π»Π°Π·Π΅ΡΠ½ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΡΡΡΠΌΠΊΠΈ ΠΌΠ΅ΡΡΠ½ΠΎΡΡΠΈ Ρ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΉ ΡΠΈΡΡΠΎΠ²ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΎΠΉ ΡΡΡΡ
ΠΌΠ΅ΡΠ½ΡΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΡΠ΅Π»ΡΠ΅ΡΠ°.ΠΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΠ΅ ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ, ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΡΠ΅ Π² ΠΡΠΈΠ±Π°ΠΉΠΊΠ°Π»ΡΠ΅, ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΈ ΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΡ 43 ΠΏΠ°Π»Π΅ΠΎΡΠΎΠ±ΡΡΠΈΡ Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
16 ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅Π½Π½ΡΡ
ΡΡΡΡΠΊΡΡΡ, Π² ΡΠΎΠΌ ΡΠΈΡΠ»Π΅ Π΄Π»Ρ 18 ΠΏΠ°Π»Π΅ΠΎΡΠΎΠ±ΡΡΠΈΠΉ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ Π°Π±ΡΠΎΠ»ΡΡΠ½ΡΠΉ Π²ΠΎΠ·ΡΠ°ΡΡ ΠΏΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌ ΡΠ°Π΄ΠΈΠΎΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΠΎΠ³ΠΎ Π΄Π°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ. Π ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π²ΠΎΠ·ΡΠ°ΡΡΠ° Π±ΡΠ»ΠΎ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΡΡΠ΄ Π΄ΠΈΡΠ»ΠΎΠΊΠ°ΡΠΈΠΉ Π±ΡΠ» ΡΠ²ΡΠ·Π°Π½ Ρ ΠΈΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ Π·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΡΠΌΠΈ XVIII ΠΈ XIX Π²Π΅ΠΊΠΎΠ², Π΄ΠΎΡΡΠΎΠ²Π΅ΡΠ½ΡΡ
ΡΠ²Π΅Π΄Π΅Π½ΠΈΠΉ ΠΎΠ± ΡΠΏΠΈΡΠ΅Π½ΡΡΠ°Ρ
ΠΊΠΎΡΠΎΡΡΡ
Π½Π΅ ΡΡΡΠ΅ΡΡΠ²ΡΠ΅Ρ. ΠΠ»Π°Π³ΠΎΠ΄Π°ΡΡ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌ Π°Π±ΡΠΎΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΈ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ Π΄Π°ΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π΅ΠΊΠΎΡΠΎΡΡΠ΅ ΠΏΠ°Π»Π΅ΠΎΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅Π½Π½ΡΠ΅ ΡΡΡΡΠΊΡΡΡΡ Π±ΡΠ»ΠΈ Π΄Π΅ΡΡΠ°Π³ΠΌΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Ρ Π½Π° ΠΎΡΡΠ΅Π·ΠΊΠΈ Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌ Π²ΡΠ΅ΠΌΠ΅Π½Π΅ΠΌ Π°ΠΊΡΠΈΠ²Π°ΡΠΈΠΈ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ ΡΡΠΎΡΠ½ΠΈΡΡ ΡΠΏΠΈΡΠ΅Π½ΡΡΡ ΠΈ ΠΌΠ°Π³Π½ΠΈΡΡΠ΄Ρ ΠΏΠ°Π»Π΅ΠΎΠ·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ. ΠΡΠΌΠ΅ΡΠ΅Π½Ρ ΡΠ»ΡΡΠ°ΠΈ Π΅Π΄ΠΈΠ½ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π²ΡΠΊΡΡΡΠΈΡ Π΄ΠΈΡΠ»ΠΎΠΊΠ°ΡΠΈΠΉ ΡΠ΅ΠΉΡΠΌΠΎΠ³Π΅Π½Π½ΡΡ
ΡΡΡΡΠΊΡΡΡ, ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΡΡ
ΡΡΠ΄ΠΎΠΌ, Π½ΠΎ ΡΡΠΈΡΠ°Π²ΡΠΈΡ
ΡΡ ΡΠ°ΠΌΠΎΡΡΠΎΡΡΠ΅Π»ΡΠ½ΡΠΌΠΈ.Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ Π½ΠΎΠ²ΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΊ Π²ΡΠ±ΠΎΡΡ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠΉ ΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΉ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΏΠ°Π»Π΅ΠΎΠΌΠ°Π³Π½ΠΈΡΡΠ΄ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΠΎΡ ΠΊΠΎΠ½ΠΊΡΠ΅ΡΠ½ΡΡ
Π³Π΅ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΠ±ΡΡΠ°Π½ΠΎΠ²ΠΎΠΊ, Π½ΠΎ ΠΈ ΠΎΡ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ ΠΈΠ·ΡΡΠ΅Π½Π½ΠΎΡΡΠΈ ΡΠ΅ΠΉΡΠΌΠΎΠ΄ΠΈΡΠ»ΠΎΠΊΠ°ΡΠΈΠΉ ΠΈ Π΄ΠΎΡΡΠΎΠ²Π΅ΡΠ½ΠΎΡΡΠΈ ΠΈΠΌΠ΅ΡΡΠΈΡ
ΡΡ Π΄Π°Π½Π½ΡΡ
ΠΎΠ± ΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°Ρ
ΠΠΠ Π’Π Π‘ΠΠΠ‘ΠΠΠ’ΠΠΠ’ΠΠΠΠΠ ΠΠΠ‘Π’ΠΠ§ΠΠΠ Π‘ΠΠΠΠ Π
The paper reviews goals and objectives, stages and the content of seismotectonic studies conducted in Eastern Siberia. Such studies are based on a comprehensive analysis of geological and geophysical data and provide for establishing whether the local earthquakes are of tectonic origin and revealing their relationships with recent geodynamic processes in the area under study. Seismic hazard assessment and evaluation of tectonic processes are the two major, closely interrelated aspects of seismotectonic studies. The latter are generally conducted in combination with seismic studies prior to the stage of detailed seismic zonation (DSZ) which is followed by seismic micro-zonation (SMZ). In three stages of seismotectonic studies, we analyse specific geological structures, reveal the regional dynamics of seismotectonic processes, clarify details of potential seismic hazard locations and identify sites of the potential instantaneous deformation of the crust which may take place due to active faulting. Based on results of the long-term studies conducted by the authors, a seismotectonic map of Eastern Siberia is compiled. The paper briefly reviews the methods of mapping and refers to data on active faults and neotectonic structures revealed in the area under study, which are closely related to regional earthquake sources.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π·Π°Π΄Π°ΡΠΈ, ΡΡΠ°Π΄ΠΈΠΉΠ½ΠΎΡΡΡ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΈ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΡΠ΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΊΠ°ΠΊ ΠΎΡΠ΄Π΅Π»ΡΠ½ΠΎΠ³ΠΎ Π²ΠΈΠ΄Π° Π°Π½Π°Π»ΠΈΠ·Π° ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΡ
Π³Π΅ΠΎΠ»ΠΎΠ³ΠΎ-Π³Π΅ΠΎΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ², ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΡΡ
Π΄Π»Ρ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΈΡΠΎΠ΄Ρ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΠΉ ΠΌΠ΅ΡΡΠ½ΡΡ
Π·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ ΠΈ ΠΈΡ
ΡΠ²ΡΠ·ΠΈ Ρ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌΠΈ Π³Π΅ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ, ΠΏΡΠΎΡΠ΅ΠΊΠ°ΡΡΠΈΠΌΠΈ Π½Π° ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΠΎΠΉ ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠΈ. Π Π·Π°Π΄Π°ΡΠΈ ΡΠ΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π²Ρ
ΠΎΠ΄ΡΡ Π΄Π²Π° ΡΠ΅ΡΠ½ΠΎ Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ: ΠΎΡΠ΅Π½ΠΊΠ° ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²Π»Π΅Π½ΠΈΠΉ ΠΈ ΠΎΡΠ΅Π½ΠΊΠ°Β ΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ². Π‘Π΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ, ΡΠΎΠ²ΠΌΠ΅ΡΡΠ½ΠΎ Ρ ΡΠ΅ΠΉΡΠΌΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ, Π²ΡΠ΅Π³Π΄Π° ΠΏΡΠ΅Π΄Π²Π°ΡΡΡΡ ΡΡΠ°Π΄ΠΈΡ Π΄Π΅ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°ΠΉΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ (ΠΠ‘Π ) ΠΈ Π² ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΌ β ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΈΠΊΡΠΎΡΠ°ΠΉΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ (Π‘ΠΠ ). Π‘Π°ΠΌΠΈ ΡΠ΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΠ²ΠΎΠ΄ΡΡΡΡ Π² ΡΡΠΈ ΡΡΠ°ΠΏΠ° ΠΈ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡ Π½Π° ΡΠ΅Π³ΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΌ ΡΡΠΎΠ²Π½Π΅ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΠΊΡΠ΅ΡΠ½ΡΡ
Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΡΡΠΊΡΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΡ Π³Π΅ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΡ ΡΠ΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ², ΠΏΡΠΎΠ²Π΅ΡΡΠΈ Π΄Π΅ΡΠ°Π»ΡΠ½ΡΡ Π»ΠΎΠΊΠ°Π»ΠΈΠ·Π°ΡΠΈΡ ΡΠ΅ΠΉΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ ΠΈ Π²ΡΡΠ²ΠΈΡΡ ΠΌΠ΅ΡΡΠ° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΡ ΠΌΠ³Π½ΠΎΠ²Π΅Π½Π½ΡΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ Π·Π΅ΠΌΠ½ΠΎΠΉ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ, ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ Π°ΠΊΡΠΈΠ²Π½ΡΠΌΠΈ ΡΠ°Π·Π»ΠΎΠΌΠ°ΠΌΠΈ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΌΠ½ΠΎΠ³ΠΎΠ»Π΅ΡΠ½ΠΈΡ
Π°Π²ΡΠΎΡΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΎΠ±ΠΎΠ±ΡΠ΅Π½Ρ Π² ΠΊΠ°ΡΡΠ΅ ΡΠ΅ΠΉΡΠΌΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΠΊΠΈ ΠΠΎΡΡΠΎΡΠ½ΠΎΠΉ Π‘ΠΈΠ±ΠΈΡΠΈ, Π΄Π»Ρ ΠΊΠΎΡΠΎΡΠΎΠΉ Π΄Π°Π΅ΡΡΡ ΠΊΡΠ°ΡΠΊΠΎΠ΅ ΠΎΠΏΠΈΡΠ°Π½ΠΈΠ΅ ΠΏΡΠΈΠ½ΡΠΈΠΏΠΎΠ² ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² Π΅Π΅ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ, ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ Π½Π°Π³Π»ΡΠ΄Π½ΡΠ΅ ΠΏΡΠΈΠΌΠ΅ΡΡ Π²ΡΠ΄Π΅Π»Π΅Π½Π½ΡΡ
Π°ΠΊΡΠΈΠ²Π½ΡΡ
ΡΠ°Π·Π»ΠΎΠΌΠΎΠ² ΠΈ Π½Π΅ΠΎΡΠ΅ΠΊΡΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΡΡΠΊΡΡΡ, ΡΠ΅ΡΠ½ΠΎ ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ ΡΠ΅Π³ΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠΌΠΈ ΡΠΏΠΈΡΠ΅Π½ΡΡΠ°ΠΌΠΈ Π·Π΅ΠΌΠ»Π΅ΡΡΡΡΠ΅Π½ΠΈΠΉ
PALEOEARTHQUAKES IN THE PRIBAIKALIE: METHODS AND RESULTS OF DATING
In the Pribaikalie and adjacent territories, seismogeological studies have been underway for almost a half of the century and resulted in discovery of more than 70 dislocations of seismic or presumably seismic origin. With commencement of paleoseismic studies, dating of paleo-earthquakes was focused on as an indicator useful for long-term prediction of strong earthquakes. V.P. Solonenko [Solonenko, 1977] distinguished five methods for dating paleoseismogenic deformations, i.e. geological, engineering geological, historico-archeological, dendrochronological and radiocarbon methods. However, ages of the majority of seismic deformations, which were subject to studies at the initial stage of development of seismogeology in Siberia, were defined by methods of relative or correlation age determination.Since the 1980s, studies of seismogenic deformation in the Pribaikalie have been widely conducted with trenching. Mass sampling, followed with radiocarbon analyses and definition of absolute ages of paleo-earthquakes, provided new data on seismic regimes of the territory and rates of and recent displacements along active faults, and enhanced validity of methods of relative dating, in particular morphometry. Capacities of the morphometry method has significantly increased with introduction of laser techniques in surveys and digital processing of 3D relief models.Comprehensive seismogeological studies conducted in the Pribaikalie revealed 43 paleo-events within 16 seismogenic structures. Absolute ages of 18 paleo-events were defined by the radiocarbon age determination method. Judging by their ages, a number of dislocations were related with historical earthquakes which occurred in the 18th and 19th centuries, yet any reliable data on epicenters of such events are not available. The absolute and relative dating methods allowed us to identify sections in some paleoseismogenic structures by differences in ages of activation and thus provided new data for more accurate definitions of epicenters and magnitudes of the paleo-earthquakes. In some cases, it was revealed that neighboring dislocations of seismogenic structures, which were previously considered independent, had been subject to simultaneous opening.The article presents a new approach to selecting regression equations to estimate paleo-magnitudes with regard to specific geodynamic conditions as well as to levels of available knowledge on seismodislocations and reliability of available data parameters
A SEISMOTECTONIC MAP OF EASTERN SIBERIA
The paper reviews goals and objectives, stages and the content of seismotectonic studies conducted in Eastern Siberia. Such studies are based on a comprehensive analysis of geological and geophysical data and provide for establishing whether the local earthquakes are of tectonic origin and revealing their relationships with recent geodynamic processes in the area under study. Seismic hazard assessment and evaluation of tectonic processes are the two major, closely interrelated aspects of seismotectonic studies. The latter are generally conducted in combination with seismic studies prior to the stage of detailed seismic zonation (DSZ) which is followed by seismic micro-zonation (SMZ). In three stages of seismotectonic studies, we analyse specific geological structures, reveal the regional dynamics of seismotectonic processes, clarify details of potential seismic hazard locations and identify sites of the potential instantaneous deformation of the crust which may take place due to active faulting. Based on results of the long-term studies conducted by the authors, a seismotectonic map of Eastern Siberia is compiled. The paper briefly reviews the methods of mapping and refers to data on active faults and neotectonic structures revealed in the area under study, which are closely related to regional earthquake sources