Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting?
Various definitions of the kinematic types of faults are reviewed. The degree of symmetry in the distribution of anomalous displacements of the ground surface is proposed as a morphological criterion for identifying the types of faults based on geodetic observations. Local anomalies of vertical disp...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2018-10-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/633 |
| _version_ | 1797855738798800896 |
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| author | Yu. O. Kuzmin |
| author_facet | Yu. O. Kuzmin |
| author_sort | Yu. O. Kuzmin |
| collection | DOAJ |
| description | Various definitions of the kinematic types of faults are reviewed. The degree of symmetry in the distribution of anomalous displacements of the ground surface is proposed as a morphological criterion for identifying the types of faults based on geodetic observations. Local anomalies of vertical displacements identified by geodetic observations in the fault zones are analysed by types. It is revealed that 88 % of the analysed anomalies show local symmetrical subsidence of the ground surface near the faults. Morphologically, these anomalies correspond to the subvertical tensile faults. Mechanisms of three types (block, dislocation, and parametric) are discussed considering the formation of the observed displacements in the zones of activation of the tensile faults. A comparison of the calculated and observed displacements of the ground surface shows that the best consistency between the theory and the observations is achieved using the model of local parametric excitation of deformation under quasi-static regional loads and the theory of strain nuclei (soft inclusions). |
| first_indexed | 2024-04-09T20:28:23Z |
| format | Article |
| id | doaj.art-1015982a3f3d4d568b80c86f81bebb0a |
| institution | Directory Open Access Journal |
| issn | 2078-502X |
| language | English |
| last_indexed | 2024-04-09T20:28:23Z |
| publishDate | 2018-10-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj.art-1015982a3f3d4d568b80c86f81bebb0a2023-03-30T20:08:03ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2018-10-019396798710.5800/GT-2018-9-3-0379377Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting?Yu. O. Kuzmin0O.Yu. Schmidt Institute of Physics of the Earth of RASVarious definitions of the kinematic types of faults are reviewed. The degree of symmetry in the distribution of anomalous displacements of the ground surface is proposed as a morphological criterion for identifying the types of faults based on geodetic observations. Local anomalies of vertical displacements identified by geodetic observations in the fault zones are analysed by types. It is revealed that 88 % of the analysed anomalies show local symmetrical subsidence of the ground surface near the faults. Morphologically, these anomalies correspond to the subvertical tensile faults. Mechanisms of three types (block, dislocation, and parametric) are discussed considering the formation of the observed displacements in the zones of activation of the tensile faults. A comparison of the calculated and observed displacements of the ground surface shows that the best consistency between the theory and the observations is achieved using the model of local parametric excitation of deformation under quasi-static regional loads and the theory of strain nuclei (soft inclusions).https://www.gt-crust.ru/jour/article/view/633tensile faultshear faultanomalies of vertical and horizontal displacementslocal subsidencedislocation modelparametrical modelstrain nuclei |
| spellingShingle | Yu. O. Kuzmin Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? Геодинамика и тектонофизика tensile fault shear fault anomalies of vertical and horizontal displacements local subsidence dislocation model parametrical model strain nuclei |
| title | Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? |
| title_full | Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? |
| title_fullStr | Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? |
| title_full_unstemmed | Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? |
| title_short | Recent anomalous deformation of the ground surface in fault zones: shear or tensile faulting? |
| title_sort | recent anomalous deformation of the ground surface in fault zones shear or tensile faulting |
| topic | tensile fault shear fault anomalies of vertical and horizontal displacements local subsidence dislocation model parametrical model strain nuclei |
| url | https://www.gt-crust.ru/jour/article/view/633 |
| work_keys_str_mv | AT yuokuzmin recentanomalousdeformationofthegroundsurfaceinfaultzonesshearortensilefaulting |