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Chuya Fault

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Journal Article
Published: 01 January 2017
Russ. Geol. Geophys. (2017) 58 (1): 123–132.
... in the initial stage of processing. The final models were obtained using the Zond, CorelDraw, and Surfer software. Table 1. Fault structures and their geoelectrical characteristics in the epicentral zone of the 2003 Chuya earthquake (Gorny Altai) from resistivity data VES 33 VES 34 Layer...
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Journal Article
Published: 01 May 2025
Russ. Geol. Geophys. (2025) 66 (5): 630–643.
...E.V. Deev; V.V. Olenchenko; A.A. Duchkov; A.A. Zaplavnova; O.V. Safronov Active faults under permafrost conditions in the highland part of Gorny Altai (South Chuya and Kubadru fault zones) and the Lena River delta (Primorsky Fault Zone) were studied using the electrical resistivity tomography...
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Seismotectonic map of epicentral area. Main surface rupture (bold red lines) of the 2003 Gorny Altay earthquake follows the northern edge of the Chuya range along the North Chuya fault (NCF). The Chuya and Kurai basins filled with Tertiary sediments are limited north and south by growing ranges: the Kurai and Chuya mountains, respectively. The Kurai fault (KF), the major right-lateral strike-slip fault in the area, was not activated during the 2003 earthquake. We distinguish three rupture sections of the 2003 surface rupture (I, II, and III): the northwestern section along Kurai basin, the central section where the fault crosses the saddle between the Sukkor block and the Chuya range, and the southeastern section where the rupture splays into several branches (see the Discussion section of the text). Northwest of the Kurai basin, ground breaks (thin red lines) may be secondary shaking-induced features, although they are associated with preexisting fault scarps (Rogozhin et al., 1998). Focal mechanism and magnitude from Harvard are also shown. SKF stands for the South Kurai fault.
Published: 01 December 2008
Figure 3. Seismotectonic map of epicentral area. Main surface rupture (bold red lines) of the 2003 Gorny Altay earthquake follows the northern edge of the Chuya range along the North Chuya fault ( NCF ). The Chuya and Kurai basins filled with Tertiary sediments are limited north and south
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Model geometry of blocks and boundary conditions. Blocks are shown in different gray shades and keyed as b15 for Chuya basin, b16 for Chagan-Uzun block, b33 for Shavla block, b39 for Chuya fault, b40 for Kurai basin, b41 for Kurai block, b44 for Iolga-Aigulak block, and b45 for Sumulta block. Kinematical boundary conditions are shown as slip vectors along block boundaries; lithospheric response at open boundaries is simulated by Winkler condition with assumed stiffness of fictitious strings of Kf = 1.2·105 Pa. Model area corresponds to that contoured by dashed line in Fig. 1.
Published: 01 February 2009
Fig. 4. Model geometry of blocks and boundary conditions. Blocks are shown in different gray shades and keyed as b15 for Chuya basin, b16 for Chagan-Uzun block, b33 for Shavla block, b39 for Chuya fault, b40 for Kurai basin, b41 for Kurai block, b44 for Iolga-Aigulak block, and b45 for Sumulta
Journal Article
Published: 01 December 2008
Bulletin of the Seismological Society of America (2008) 98 (6): 2849–2865.
...Figure 3. Seismotectonic map of epicentral area. Main surface rupture (bold red lines) of the 2003 Gorny Altay earthquake follows the northern edge of the Chuya range along the North Chuya fault ( NCF ). The Chuya and Kurai basins filled with Tertiary sediments are limited north and south...
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Journal Article
Published: 01 November 2024
Russ. Geol. Geophys. (2024) 65 (11): 1383–1396.
... with focal depths from the first 100 m to 20 km. The focal area is not a subsequent activation along the same fault with the Chuya earthquake, but is located on a subparallel fault in the nodal region with its branching into three faults. The seismic activation of the Aigulak focal area is not an aftershock...
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Source zones (Chuya and Aigulak) and a model of fault zones.
Published: 01 November 2024
Fig. 11. Source zones (Chuya and Aigulak) and a model of fault zones.
Journal Article
Published: 01 February 2009
Russ. Geol. Geophys. (2009) 50 (2): 104–114.
...Fig. 4. Model geometry of blocks and boundary conditions. Blocks are shown in different gray shades and keyed as b15 for Chuya basin, b16 for Chagan-Uzun block, b33 for Shavla block, b39 for Chuya fault, b40 for Kurai basin, b41 for Kurai block, b44 for Iolga-Aigulak block, and b45 for Sumulta...
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Aftershocks of Chuya earthquake and their fault-plane solutions. Hypocenters relocated using tomography-based velocity model. 1 — aftershocks; 2 — events for which fault plane solutions were obtained (with origin times). Z, km, is depth, K is energy class; 3 — faults.
Published: 01 October 2005
Fig. 1. Aftershocks of Chuya earthquake and their fault-plane solutions. Hypocenters relocated using tomography-based velocity model. 1 — aftershocks; 2 — events for which fault plane solutions were obtained (with origin times). Z, km, is depth, K is energy class; 3 — faults.
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Morphotectonic model of western Gorny Altai, with MTS points. 1, MTS points, 2–5, neotectonic faults: uncertain slip geometry (2), right-lateral strike-slip faults and reverse faults with a strike-slip component (3), reverse and thrust faults (4), normal faults and grabens (5); 6, profiles shown in Figs. 2, 4, 6, and 7. Abbreviations stand for: NCh, North Chuya Range; SCh, South Chuya Range; KR, Kurai Range; UR, Ulagan Range; ChU, Chagan-Uzun Mountains; K, Kurai basin; Ch, Chuya basin.
Published: 01 July 2017
Fig. 1. Morphotectonic model of western Gorny Altai, with MTS points. 1 , MTS points, 2–5 , neotectonic faults: uncertain slip geometry ( 2 ), right-lateral strike-slip faults and reverse faults with a strike-slip component ( 3 ), reverse and thrust faults ( 4 ), normal faults and grabens ( 5
Journal Article
Published: 01 June 2022
Russ. Geol. Geophys. (2022) 63 (6): 743–754.
... sliding features along the northern borders of the two basins ( Fig. 1, A–C ) are associated with active faults of the Kurai zone, including the largest Sukor rockslide ( Figs. 1 B and 2 ). The rockslide can be seen along the Chuya motor road (R-256) between Russia and Mongolia, in the left bank...
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Journal Article
Published: 01 April 2021
Russ. Geol. Geophys. (2021) 62 (4): 474–485.
.... Both of them are broken by longitudinal faults along which the slope parts of the bottoms of the Chuya depression and the Dzhazator Valley are involved in the uplift ( Agatova, 2000 ). The South Chuya Ridge involves volcanic-sedimentary Cambrian, Ordovician, Silurian, and Devonian deposits...
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Schematic occurrence of the Chuya complex lamprophyre dikes in the area of Russia (compiled after Dobretsov et al. (1995, 2005)). 1, Cambrian–Ordovician metamorphic rocks; 2, Devonian deposits; 3, Quaternary deposits; 4, Mesozoic granitoids; 5, other regional granitoids; 6, area of occurrence of Chuya complex lamprophyre dikes; 7, local lamprophyre areas within the Chuya complex (1, Aktash, 2, Aktura, 3, South Chuya, 4, Yustyd, 5, Kalguty, 6, Tolbonur); 8, tectonic zones; 9, faults; 10, frontier. The lines show the main directions of dike strike.
Published: 01 December 2011
, area of occurrence of Chuya complex lamprophyre dikes; 7 , local lamprophyre areas within the Chuya complex (1, Aktash, 2, Aktura, 3, South Chuya, 4, Yustyd, 5, Kalguty, 6, Tolbonur); 8 , tectonic zones; 9 , faults; 10 , frontier. The lines show the main directions of dike strike.
Journal Article
Published: 01 November 2008
Russ. Geol. Geophys. (2008) 49 (11): 859–867.
... of crustal failure at the junction of two relatively stable blocks. The model predicts motions under general NW compression mainly on right-lateral strike-slip faults accompanied by systems of pinnate reverse and extensional faults. The locations and mechanisms of aftershocks that followed the 2003 Chuya...
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Schematic structure and position of the Baikal–Patom belt (BPB) (Ivanov, 2014): Chuya–Nechera anticlinorium: 1 – Paleoproterozoic basement highs (N – Nechera, T – Tonoda, Ch – Chuya); 2 – part of the Chuya–Nechera anticlinorium with a basement covered with Neoproterozoic deposits; synclinorium: 3 – Bodaibo zone, 4 – Patom zone, 5 – exposed pre-Neoproterozoic basement on the synclinorium periphery; Siberian craton: zones of linear folds formed on the shelf of the passive continental margin; 6 – Lena zone, 7 – Chara zone; 8 – weakly deformed part of the Siberian Platform; 9 – Paleoproterozoic complexes of the Aldan Shield and Stanovoi zone; 10 – Neoproterozoic complexes of the Baikal–Muya belt (BMB); 11 – late Paleozoic granitoids (Angara– Vitim batholith); 12 – major faults between large lithospheric blocks; 13 – major intrablock faults; 14 – gold deposits.
Published: 01 March 2024
Fig. 1. Schematic structure and position of the Baikal–Patom belt (BPB) ( Ivanov, 2014 ): Chuya–Nechera anticlinorium: 1 – Paleoproterozoic basement highs (N – Nechera, T – Tonoda, Ch – Chuya); 2 – part of the Chuya–Nechera anticlinorium with a basement covered with Neoproterozoic deposits
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Topography, tectonic provinces, and major active faults of the Altai–Sayan mountain region. 1, distribution of earthquake epicenters from the catalog of focal mechanisms used for the tectonophysical reconstruction of stresses; 2, location of the regional network of seismic stations; 3, here and below, the major active faults according to Trifonov (2002). Mountain uplifts: DA, Dzhebash anticlinorium, SR, Sangilen Ridge of the Tuva–Northern Mongolia block; TaU, Tannu-Ola uplift; TNMB, Tuva-Northern Mongolia block; KhChA, Kholzun-Chuya anticlinorium; KhA, Khangai anticlinorium; ChTMA, Chingiz–Tarbagatai megaanticlinorium; ShA, Shapshal anticlinorium; NCR, North Chuya Range; CUB, Chagan-Uzun block. Subsidence areas: AT, Achit-Nuur trough; ACS, Anui-Chuya synclinorium; BID, Busingol intermontane depression; GLB, Great Lakes basin; JB, Junggar basin, ZB, Zaisan basin; TD, Todzha depression; TB, Tuva basin; UNB, Uvs Nuur basin; CID, Chuya intermontane depression. Major faults: Ag, Agardag; Az, Azas; Ae, Aelegest; AOR, Obruchev Rift; BB, Belin-Busingol fault system; B, Belin; D, Dzhazator; DD, Dzhun-Dgirgelent; Z, Zaisan; WT, Western Tannu-Ola; I, Irtysh; Ko, Kobdo, Ku, Kurai; TsSh, Tsagan-Shibetin system, Sa, Salen; S, Sagsai; ST, Sayan-Tuva; U, Umsk; Kh, Khangai (Bolnay); Ts, Tsetserleg; ChNR, Chingiz-Narym; Sh, Shapshal; SA, Southern Altai; SK, Southern Katun; SCh, Southern Chuya.
Published: 01 February 2013
; 3 , here and below, the major active faults according to Trifonov ( 2002 ). Mountain uplifts: DA, Dzhebash anticlinorium, SR, Sangilen Ridge of the Tuva–Northern Mongolia block; TaU, Tannu-Ola uplift; TNMB, Tuva-Northern Mongolia block; KhChA, Kholzun-Chuya anticlinorium; KhA, Khangai anticlinorium
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Location of dike areas of the Chuya and intrusive massifs of the Terandzhik and Tarkhata complexes in southeastern Gorny Altai (a) and geologic structure of southeastern Gorny Altai, after Turkin and Fedak (2008), simplified (b). a: 1, Delyun–Yustyd trough; 2, Cenozoic deposits of the Chuya basin; 3, dike areas of the Chuya complex: K, Kurai; SCh, South Chuya; Zh, Zhumala; S, Sarzhematy; T, Tashanta; Yu, Yustyd; B, Buguzun; TV, Tuva; 4, intrusive massifs of the Tarkhata and Terandzhik complexes: Tr, Tarkhata; Zhn, Zhanedyngui; Tzh, Terandzhik; 5, fault zones: a, major (terrane boundaries); b, accessory (intrablock); 6, boundary of the area of the Chuya complex rocks; b: 1–12, structure-lithologic complexes of evolution stages: 1–3, oceanic (R3−Є1): ultrabasites and ophiolites (1), siliceous-carbonate deposits (2), basalts (3); 4, 5, island-arc (Є1–O1): basalts and plagiorhyolites (4), turbidites (5); 6, passive continental margin (O1–D1): carbonate-terrigenous and terrigenous deposits; 7–9, active continental margin (D1–C1): volcanic molassas, basalts, andesites, rhyolites (7), gabbro-diorite (8), and granitoid (9) associations; 10, collision (P–T): granitoids; 11, intraplate (J): granitoids; 12, undivided metamorphic deposits (PZ): gneisses, schists, eclogites, and greenschists of andalusite–sillimanite and kyanite facies series; 13, Cenozoic loose deposits (Chuya basin); 14, major (a) and accessory (b) faults; 15, outlines of the area of lamprophyres and lamproites of the Chuya complex (T1–2); 16, position of the lamproite area; 17, monzonitoid massifs (T1–2); 16, 17, designations follow Fig. 1a.
Published: 01 June 2015
deposits of the Chuya basin; 3 , dike areas of the Chuya complex: K, Kurai; SCh, South Chuya; Zh, Zhumala; S, Sarzhematy; T, Tashanta; Yu, Yustyd; B, Buguzun; TV, Tuva; 4 , intrusive massifs of the Tarkhata and Terandzhik complexes: Tr, Tarkhata; Zhn, Zhanedyngui; Tzh, Terandzhik; 5 , fault zones
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Neotectonics of the Kurai-Chuya system of intermontane areas and their margins (structure names follow [9] with some supplements). 1 – major faults; 2 – minor faults: a – observed, b – hypothetical, possibly existing beneath the Late Cenozoic sediment cover; 3 – boundaries of Cenozoic sedimentary basins in place of pre-existing depressions; 4 – blocks of the Paleozoic basement topographically expressed as positive structures: I–V – ranges (elongate blocks): I – Kurai, II – Chulyshman, III – Aigrlak, IV– North-Chuya, V – South-Chuya; VI–IX – mountains (small isometric blocks): VI – Estulin, VII – Chagan-Uzun, IX – Bashkaus, X – Kyzylchin, XI – plateaus (large isometric blocks): Sailyugem; 5 – blocks of the Paleozoic basement topographically expressed as negative structures: 1–7 –depressions (Cenozoic sedimentary basins): 1 – Chuya, 2 – Kurai, 3 – I1dyskel’, 4 – Eshtykel’, 5 – Sorlukel’, 6 – Kokorya, 7 – Samakha; 6 – areas shown in Figs. 2 and 3.
Published: 01 July 1998
Fig. 1. Neotectonics of the Kurai-Chuya system of intermontane areas and their margins (structure names follow [ 9 ] with some supplements). 1 – major faults; 2 – minor faults: a – observed, b – hypothetical, possibly existing beneath the Late Cenozoic sediment cover; 3 – boundaries
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Focal mechanisms of large aftershocks of 2003 Chuya earthquake (located from DD tomography). 1 — aftershocks of 2003 Chuya earthquake (located from DD tomography); 2 — events for which focal mechanisms were obtained (with dates and time of origin, depth in km (Z), and magnitudes); 3 — faults.
Published: 01 November 2008
Fig. 4. Focal mechanisms of large aftershocks of 2003 Chuya earthquake (located from DD tomography). 1 — aftershocks of 2003 Chuya earthquake (located from DD tomography); 2 — events for which focal mechanisms were obtained (with dates and time of origin, depth in km (Z), and magnitudes); 3
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A view of a simplified geoelectric test model from the south. Values of ρm are shown on the blocks. OPs are shown on the plane Z = 0, with the respective numbers of experimental MTS sites in parentheses. At the top: fault names. Regional structures: 1, Chagan-Uzun block; 2, Chuya basin; 3, South Chuya horst; 4, Caledonides of the Tuva TSAs.
Published: 01 January 2020
Fig. 3. A view of a simplified geoelectric test model from the south. Values of ρ m are shown on the blocks. OPs are shown on the plane Z = 0, with the respective numbers of experimental MTS sites in parentheses. At the top: fault names. Regional structures: 1, Chagan-Uzun block; 2, Chuya