Dynamics of the Relief and Seismotectonic Activity of the Modern Structures in the Delta of the River Lena

Имаева, Л. П.; Гусев, Г. С.; Imaev, V. S.

doi:10.1134/s0016852119050029

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…The modern stress field of the Kharaulakh segment, based on seismicity, contains both normal and thrust faulting stress fields, but always with a significant strike-slip component, which often predominates (Franke et al 2000;Imaev et al 2018;Imaeva et al 2019). The absence of a strike-slip faulting stress field in the Danil River area shows that Cenozoic tectonics did not significantly affect the central part of the Kharaulakh segment.…”

Section: B Correlation Of Deformation Events In Northern Verkhoyansk ...mentioning

confidence: 97%

Tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt: insights from palaeostress analysis and U–Pb calcite dating

et al. 2022

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A combined structural and geochronological study was carried out to identify the tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt, formed on the east margin of the Siberian Craton during late Mesozoic collision. Fault and fold geometries and kinematics were used for palaeostress reconstruction along the Danil and Neleger rivers cross-cutting the central and western parts of the Kharaulakh segment of the northern Verkhoyansk. Three different stress fields (thrust, normal and strike-slip faulting) were identified after separation from heterogeneous fault-slip data. Thrust and normal faulting stress fields were found in both areas, whereas a strike-slip faulting stress field was only found in Neoproterozoic rocks of the Neleger River area. U–Pb laser ablation – inductively coupled plasma – mass spectrometry (LA-ICP-MS) dating of calcite slickenside samples reveals the following succession of major deformation events across the northern Verkhoyansk: (i) The oldest tectonic event corresponding to the strike-slip faulting stress field with NE–SW-trending compression axis is Early Permian (Cisuralian, 284 ± 7 Ma) and likely represents a far-field response to the late Palaeozoic collision of the Kara terrane with the northern margin of the Siberian Craton. (ii) A slickenfibrous calcite age of 125 ± 4 Ma is attributed to the Early Cretaceous compression event, when the fold-and-thrust structure was formed. (iii) U–Pb slickenfibre calcite ages of 76–60 Ma estimate the age of a Late Cretaceous – Palaeocene compression event, when thrusts were reactivated. Slickensides related to both (ii) and (iii) compressional tectonic events formed by similar stress fields with W–E-trending compression axes. (iv) From the Palaeocene onwards, extensional tectonics with approximately W–E extension predominated.

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Section: B Correlation Of Deformation Events In Northern Verkhoyansk ...mentioning

confidence: 97%

Tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt: insights from palaeostress analysis and U–Pb calcite dating

et al. 2022

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“…Seismic activity is quite often manifested in the east (Seredkina and Koz'min, 2017) while in the west it is extremely rare (Gusev, 2015). The northeastern part of Taimyr is spatially included in the Lena-Taimyr earthquake zone of the Arctic-Asian seismic belt (Imaeva et al, 2019). The earthquakes are mainly confined to the zone of the Khatanga-Lomonosov dextral strike-slip transform fault that extends northeastward, as are the main tectonic structures of the Taimyr fold area.…”

Section: I L K I T S K Y S T R a I Tmentioning

confidence: 99%

Neotectonic Structures of Northeast Taimyr

Bryantseva

Demina

Promyslova

et al. 2021

Moscow Univ. Geol. Bull.

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This article presents the results of structural and geomorphological analysis of the Northeastern part of Taimyr Peninsula. The main neotectonic structures of the region are identified. It is shown that the intensity of neotectonic processes increased in the Northeast direction, which is due to the influence of the Gakkel Ridge spreading zone in the Arctic Ocean. Tectonic fragmentation of Taimyr, the height of mountains, and seismic activity are increasing in the same direction.

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New Data on Seismotectonics of the Laptev Sea from Observations by Ocean Bottom Seismographs

Крылов

Lobkovsky²,

Rukavishnikova³

et al. 2022

Dokl. Earth Sc.

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Dynamics of the Relief and Seismotectonic Activity of the Modern Structures in the Delta of the River Lena

Cited by 8 publications

References 5 publications

Tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt: insights from palaeostress analysis and U–Pb calcite dating

Tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt: insights from palaeostress analysis and U–Pb calcite dating

Neotectonic Structures of Northeast Taimyr

New Data on Seismotectonics of the Laptev Sea from Observations by Ocean Bottom Seismographs

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