Overview of the state of knowledge on paleotectonic stresses and their implications for solution of geological problems

Sim, L. A.

doi:10.5800/gt-2013-4-3-0105

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Approx the intra-plate stress field is more affected by induction pressure from collisional mountain-fold belts and mid-oceanic spreading ridges. The Platform is characterized by steady meridional collisional compression and sub-latitude and West-Northwest extension (Sim, 2013). The stress axis is oriented along the meridian, except for Sarmatia, where it has a North-Northwest orientation, which is related to the initial anisotropy of the lithosphere (Starostenko et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Structural evolution of the Earth crust of the East European platform: evidence from the Sarmatian plate. 1. Intra-plate tectonic and stages of the evolution of the Earth’s crust

Bartashchuk

2024

Journ. Geol., Geogr., and Geoec..

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The problems of intra-plate tectonics and geodynamics of the East European plat- form are analyzed. It is shown that the current status and tectonic position of regional structures on its territory changed during the Phanerozoic as a result of radical inversion rearrangements of the earth’s crust structure. The sources of forces and deformations and the influence of the anisotropy of the lithosphere on the evolution of the Earth’s crust based on evidence from the Sarmatia plate are considered. It is assumed that collision stress in the crust of the plate during the epochs of platform activation in the Mesozoic and Cenozoic caused the movements of Arabia and Africa and the spreading of the crust in the North Atlantic ridge. The platform is characterized by stable meridional collision compression, except for Sarmatia, where the stress axis is oriented to the north-northwest. This is related to the initial anisotropy of the plate lithosphere and its modern longitudinal structural differentiation. The stress from the boundaries of the platform was transmitted inward and absorbed in the mobile belts, which determined their overall plate mobility. The structure-forming role of collision belts in the evolution of the Earth’s crust has been clarified based on data from the Dnipro-Donetsk Paleorift Belt. A model of the evolution of the belt is proposed, according to which the rift was laid by splitting of the «cold» continental crust with displacement by the Pull-apart basin mechanism. The «built-in» anisotropy of the lithosphere of the Sarmatian plate and the lack of a direct connection between the modern segmentation of the Precambrian consolidated crust and the relief of the sole of the seismic lithosphere are considered. Due to the overall plate collision, the basin underwent inversion uplift and folding. As a result of the change in the mode of deformation along the extension of the belt, two heterogeneously deformed segments were distinguished in its structure. The western segment contains the relics of the rift, but in the eastern segment, the structure of the Graben is destroyed by cover-folding deformations. The modern longitudinal structural and material differentiation of the Sarmatian lithosphere has been established. The general orientation and phasing of the structural rearrangements of the Earth’s crust of the Precambrian Craton have been determined. It was found that the processes of evolution of the structure of the East European platform were caused by changes in geodynamic conditions and tectonic deformation regimes. Initial geotectonic data were obtained, and a rational methodology was chosen for further geodynamic interpretation. The distribution and nature of the inversion rearrangements of the Earth’s crust on the terrain of Sarmatia were clarified by reconstructing the stress field in the Phanerozoic epochs using indirect methods of Geomechanics analysis of discontinuous and folding deformations.

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Section: Discussionmentioning

confidence: 99%

Structural evolution of the Earth crust of the East European platform: evidence from the Sarmatian plate. 1. Intra-plate tectonic and stages of the evolution of the Earth’s crust

Bartashchuk

2024

Journ. Geol., Geogr., and Geoec..

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“…Известны результаты применения их в различных регионах: на территории России [Sherman, 2012;Sim, 2013;Seminsky, 2014;Rebetsky, 2015;Sankov et al, 2017], Монголии [Parfeevets, Sankov, 2018], Украины [Bubniak et al, 2013;Gintov, 2005;Gintov et al, 2013], Кыргызстана [Kalmet'eva et al, 2019] и др. При реконструкциях докайнозойских, кайнозойских и современных полей напряжений в пределах Иркутского амфитеатра [Sankov et al, 2017] использованы данные о складчатых и разрывных деформациях территории.…”

Section: методика определения возрастныхunclassified

Deformation Regimes and Low-Rank Paleotectonic Stresses of the Western Tian Shan in the Mesozoic – Cenozoic

Umurzakov

2023

Geodin. tektonofiz.

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There is a description of the results of studies of deformation regimes and reconstruction of stress fields of certain time intervals of the Mesozoic – Cenozoic history of the western part of the Tien Shan based on the geological and structural data and earthquake focal mechanisms. The relevance of research is determined by the existing difficulties in the age reference of paleostress fields, which is associated with the retrospective nature of the initial data and the features of geological evolution, as well as the existence of controversial, unresolved issues regarding the development of the western periclinal part of the Tien Shan in the Mesozoic – Cenozoic. The aim of the research is to reconstruct the rank components of paleostresses in the earth’s crust in the western part of the Tien Shan at separate stages of the Mesozoic – Cenozoic development. The time intervals for which the stress field diagrams were obtained represent cyclically manifested phases of the first-rank rhythms, which are characterized by alternation of different deformation modes. The method for reconstructing paleostresses was based on the concept of the formation of superimposed systems of cracks of various generations, which were sequentially manifested at various stages of the development of deformation processes. Analysis of the data showed that with increasing age of rocks the number of different fracture systems actually increases – the earlier systems are superimposed by the later. At the same time, the characteristic elements in Quaternary rocks manifest themselves in different ways in the older rocks. This allows them to be used for the reconstruction of the Late Cenozoic stress field based on mass measurements of fracturing in rocks of earlier Mesozoic – Cenozoic ages. Based on the step-by-step identification of the heterochronous cracks system and determination of a pair of maxima of the fracture density with asymmetric scattering, region-based diagrams of the first-rank stress fields were obtained for different stages of manifestation of Mesozoic – Cenozoic deformation regimes: 1 – from the Permian-Triassic to the Middle Jurassic; 2 – Middle-Late Jurassic; 3 – Late Jurassic – Early Cretaceous; 4 – Late Cretaceous – Paleocene – Eocene; 5 – Oligocene – Quaternary. The results obtained indicate the alternation of compression and extension phases, first-rank for the region, and give an idea of the main trends in its geodynamic evolution. They can be used in the development of a tectodynamic model of the region.

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“…В поле УЭС они выделяются низкоомными областями, что и было установлено для глубоких частей осадочного разреза на Ковыктинской площади Для сейсморазведочных данных в качестве основного способа выделения зон сгущения безамплитудных разрывов применяется атрибутный анализ куба сейсмической информации [Interpreter's Guide..., 2007]. Основными операциями, рекомендуемыми для обнару жения разрывов и других линейных аномалий волновой картины, являются «Анттрекинг» и «Дисперсия» [Pedersen et al, 2002;Silva et al, 2005;Aarre et al, 2012;Basir et al, 2013;Khair et al, 2012]. Их совместное использование для Ковыктинского участка позволило получить куб совокупности плоскостей, которые пред ставляют разрывные структуры.…”

Section: нижняя часть разреза осадочной толщиunclassified

Analysis of the Fault-Block Structure and Stress State of the Sedimentary Cover in Gas-Condensate Deposits: Basics of the Tectonophysical Approach

Seminsky

Burzunova

Bornyakov

et al. 2023

Geodin. tektonofiz.

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Consideration is being given to the tectonophysical approach to the reconstruction of structure formation mechanisms and stress-strain state of rocks in hydrocarbon deposits localized in the platform cover, which has a complex structure in terms of rheological layering and disturbance by different-rank fractures. With the Kovykta gas condensate field, largest in Eastern Siberia, there were shown the main methods and ways of using modern achievements in tectonophysics for interpreting geological and geophysical information on the upper and lower parts of the sedimentary cover, unique in terms of volume and significance, that was obtained during geological exploration therein. Regularities of changes in the stress-strain state of rocks, found during the research, are combined into a tectonophysical model, which can be used as a base for other hydrocarbon deposits. The model is based on the concept of a zone-block structure of the platform cover, which is formed by a network of subvertical and subhorizontal fault zones that divide it into less faulted blocks. Disjunctive structures are highly fractured zones with concentration of relatively small low-amplitude faults, i.e. represent the early stages of faulting. The zone-block structure is formed mainly by tectonic or gravitational forces; in the first case, the stages and fracture characteristics are transformed onto the platform from the surrounding mobile belts, and in the second case they are determined by the presence of ductile rocks in the section capable of gravitational sliding. The graphic component of the tectonophysical model is 3D datasets that show the zone-block structure and stress state of rocks for the deposit with the degree of detail provided by key geophysical materials and, primarily, by seismic data. By modern GIS, this information can be quickly retrieved for any-size area of the studied rock mass and then used as a basis for solving production issues related to the development of deposits in fracture-pore reservoirs, or for analyzing general problems of their formation and dynamics.

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Overview of the state of knowledge on paleotectonic stresses and their implications for solution of geological problems

Cited by 9 publications

References 5 publications

Structural evolution of the Earth crust of the East European platform: evidence from the Sarmatian plate. 1. Intra-plate tectonic and stages of the evolution of the Earth’s crust

Structural evolution of the Earth crust of the East European platform: evidence from the Sarmatian plate. 1. Intra-plate tectonic and stages of the evolution of the Earth’s crust

Deformation Regimes and Low-Rank Paleotectonic Stresses of the Western Tian Shan in the Mesozoic – Cenozoic

Analysis of the Fault-Block Structure and Stress State of the Sedimentary Cover in Gas-Condensate Deposits: Basics of the Tectonophysical Approach

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