Paleostress reconstructions and geodynamics of the Baikal region, Central Asia, Part 2. Cenozoic rifting

Delvaux, Damien; Moeys, Rikkert; Stapel, Gerco; Petit, Carole; Леви, К. Г.; Miroshnichenko, Andrei; Ruzhich, V. V.; Sankov, V. A.

doi:10.1016/s0040-1951(97)00210-2

Cited by 392 publications

(249 citation statements)

References 48 publications

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“…A recent and detailed interpretation of seismic profiles by Kazmin and Golmshtok (1995) indicates that the graben asymmetry is typical for the Late Oligocene-Early Pliocene period, followed by normal fault development also along the eastern side of the lake. The Middle Pliocene period corresponds to marked changes in tectonic regime with an intensification of the rates of vertical movements (Logatchev and Zorin, 1987) and a modification of the stress regime (Delvaux et al, 1996). The changes in tectonic regime in the middle Pliocene also changed the kinematics of graben formation.…”

Section: ~+ + ++mentioning

confidence: 99%

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

et al. 1996

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We review the structure and evolution of a number of Riphean-Phanerozoic rifts and extensional basins within the territory of the former Soviet Union (FSU). Horst-and-graben formation in strong crustal and subcrustal lithosphere layers can explain the multi-trough character of rift systems observed in the Russian platform, the Vilyuy rift, the West Siberian rift system, the Pechora-Kolva rift system and the Laptev Sea rift. Many features in the evolution of these rifted basins are incompatible with predictions of classical stretching models. Basin subsidence often occurs in the absence of any noticeable stretching and over time scales much longer than predicted by models of thermal subsidence. Other observations include a time gap between rifting and the onset of post-rift basin subsidence of tens to hundreds Ma and a correlation in timing of subsidence phases of rifted basins and platforms with opening and closure events of adjacent ocean basins. These observations point to an important role for mechanisms such as eclogite formation within or beneath the lithosphere as well as intraplate compression and stress-induced lithospheric deflection.

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Section: ~+ + ++mentioning

confidence: 99%

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

et al. 1996

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“…The rift system, some 1800 km long, formed during the Cenozoic along the southern margin of the Siberian Platform within the Sayan-Baikal fold-and-thrust-belt as the result of far-field plate stresses generated by the Indo-Asian collision [Molnar and Tapponnier, 1975;Delvaux et al, 1997] (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Upper mantle P velocity structure beneath the Baikal Rift from modeling regional seismic data

Brazier

Nyblade

2003

Geophysical Research Letters

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[1] Uppermost mantle P wave velocity structure beneath the Baikal rift and southern margin of the Siberian Platform has been investigated by using a grid search method to model Pnl waveforms from two moderate earthquakes recorded by station TLY at the southwestern end of Lake Baikal. The results yielded a limited number of successful models which indicate the presence of upper mantle P wave velocities beneath the rift axis and the margin of the platform that are 2 -5% lower than expected. The magnitude of the velocity anomalies and their location support the presence of a thermal anomaly that extends laterally beyond the rift proper, possibly created by small-scale convection or a plume-like, thermal upwelling.

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“…Stress re gimes are de fined based on the ori en ta tion of stress axes and the mag ni tude of the pa ram e ter R' with val ues rang ing from 0 to 3 (Delvaux et al, 1995(Delvaux et al, , 1997 -nor mal fault ing when s 2 is the max i mum hor i zon tal compres sion axis (s 2 SHmax) and s 1 is ver ti cal; R' = R (0-1) -extensional re gime; -strike-slip fault ing when s 1 is the max i mum hor i zon tal com pres sion axis (s 1 SHmax) and when s 2 is ver ti cal; R' = 2 -R (1-2) -strike-slip re gime; -thrust/re verse fault ing when s 1 is the max i mum hor i zontal com pres sion axis (s 1 SHmax) and s 3 is ver ti cal; R' = 2 + R (2-3) -compressional re gime. Crit i cal con sid er ations on the ac cu racy of stress in ver sion meth ods are given in Dupin et al (1993), Pol lard et al (1993, Nieto-Samaniego and Alaniz-Alvarez (1996), Twiss and Unruh (1998), Maerten (2000) and Rob erts and Ganas (2000).…”

Section: Methodsmentioning

confidence: 99%

Stepwise clockwise rotation of the Cenozoic stress field in the Western Carpathians as revealed by kinematic analysis of minor faults in the Manín Unit (western Slovakia)

Šimonová

Plašienka²

2017

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1 Matej Bel Uni ver sity, De part ment of Ge og ra phy and Ge ol ogy, Fac ulty of Nat u ral Sci ences, Tajovského This study aims at quan ti ta tive ki ne matic anal y sis of fault-slip data and palaeostress re con struc tion of polyphase brit tle struc tures de vel oped in the Manín Unit crop ping out in the Mid dle Váh River Val ley of west ern Slovakia. The Manín Unit neigh bours the Pieniny Klippen Belt that fol lows the bound ary be tween the Paleogene accretionary wedge of the Outer Carpathians and the Cre ta ceous nappe sys tem of the Cen tral West ern Carpathians. Af ter the nappe em place ment dur ing mid-Cre ta ceous times, the Manín Unit was in cor po rated into the Pieniny Klippen Belt and at tained its com plex tec tonic style. Based on ki ne matic anal y sis of meso-scale faults with slick en sides, six (D 1 -D 6 ) brit tle de for ma tion stages have been discerned. The rel a tive suc ces sion of in di vid ual palaeostress states was de rived from field struc tural re la tion ships; their stratigraphic age was es ti mated pri mar ily by com par i son with other pub lished data. Palaeostress anal y sis in the Manín Unit re vealed the ex is tence of six dif fer ent palaeostress fields act ing from the Middle Eocene to the Qua ter nary. The first three gen er a tions of meso-scale brit tle struc tures were formed un der a transpressional tec tonic re gime dur ing the pre-Late Eocene-Early Mio cene D 1 -D 3 de for ma tion. Gen er ally, the max i mum hor i zon tal stress axis ro tated clock wise from a W-E to an ap prox i mately N-S di rec tion. There af ter, a transtensional tec tonic re gime was char ac ter ized by a WNW-ESE to NNW-SSE ori ented min i mum hor i zon tal stress axis dur ing Middle and Late Mio cene D 4 -D 5 de for ma tion. A gen eral extensional tec tonic re gime in flu enced the struc tural evo lu tion of the area in the Plio cene to Qua ter nary, when a grad ual reori en ta tion of the palaeostress field re sulted in the de vel op ment of vari able, of ten re ac ti vated, fault struc tures.

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Paleostress reconstructions and geodynamics of the Baikal region, Central Asia, Part 2. Cenozoic rifting

Cited by 392 publications

References 48 publications

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

Extensional basins of the former Soviet Union — structure, basin formation mechanisms and subsidence history

Upper mantle P velocity structure beneath the Baikal Rift from modeling regional seismic data

Stepwise clockwise rotation of the Cenozoic stress field in the Western Carpathians as revealed by kinematic analysis of minor faults in the Manín Unit (western Slovakia)

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