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  • 1
    Monograph available for loan
    Monograph available for loan
    Frontiers in stress research : [is an assemblage of papers that have been presented at the 3rs World Stress Map conference in Potsdam, 15 - 17. October 2008] (2010)
    Amsterdam : Elsevier
    Associated volumes
    Details Availability
    Call number: ILP/M 10.0206
    In: Tectonophysics
    Type of Medium: Monograph available for loan
    Pages: VI, 238 S. : z.T. farb. Ill., graph. Darst.
    Series Statement: Tectonophysics Vol. 482, Iss. 1-4 : Special issue
    URL: https://www.sciencedirect.com/journal/tectonophysics/vol/482/issue/1
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Spatial and temporal variability of the contemporary crustal stress pattern of the Earth (2011)
    Potsdam : Deutsches GeoForschungsZentrum
    Associated volumes
    Details Availability
    Call number: 21/STR 11/05
    In: Scientific technical report
    Description / Table of Contents: This thesis summarizes the results of the WSM project's second phase (1996 - 2008). In particular it presents the major achievements that have been accomplished with the WSM 2008 database release that has been compiled under the guidance of the author. Furthermore, the thesis briefly presents three of the author's numerical models that aim at quantification the temporal changes of the crustal stress field.
    Type of Medium: Series available for loan
    Pages: 106 S. : Ill., graph. Darst., Kt.
    Series Statement: Scientific technical report / Deutsches GeoForschungsZentrum GFZ 11/05
    URL: http://ebooks.gfz-potsdam.de/pubman/item/escidoc:23073
    Classification:
    Tectonics
    Note: Zugl.: Karlsruhe, Techn. Univ., Habilitationsschr., 2009
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  • 3
    Series available for loan
    Series available for loan
    Der Mittelmeerraum : numerische Modellierung der Lithosphärendynamik im Vergleich mit Ergebnissen aus der Satellitengeodäsie (2000)
    München : Beck
    Associated volumes
    Details Availability
    Call number: S 99.0038(525)
    In: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften
    Type of Medium: Series available for loan
    Pages: 96 S.
    ISBN: 376969564X
    Series Statement: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften : Reihe C 525
    Classification:
    A.1.1.
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
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    New insights into the mechanism of postseismic stress relaxation exemplified by the 23 June 2001 M[w] = 8.4 earthquake in southern Peru (2006)
    In:  Geophys. Res. Lett., Zagreb, Conseil de l'Europe, vol. 33, no. 2, pp. 441-445, pp. L02307, (ISSN 0343-5164)
    Details
    Publication Date: 2006
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Stress ; Rheology ; Non-linear effects ; Maxwell ; Two-dimensional ; Finite Element Method ; Modelling ; Earthquake ; South ; America ; GIK ; GRL ; 1207 ; Geodesy ; and ; Gravity: ; Transient ; deformation ; (6924, ; 7230, ; 7240) ; 1242 ; Seismic ; cycle ; related ; deformations ; (6924, ; 7209, ; 7223, ; 7230) ; 7230 ; Seismology: ; Seismicity ; and ; tectonics ; (1207, ; 1217, ; 1240, ; 1242) ; 8123 ; Tectonophysics: ; Dynamics: ; seismotectonics ; 8164 ; Stresses: ; crust ; and ; lithosphere
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Velocity field of the Aegean-Anatolian region from 3D finite element models (2005)
    Springer
    In:  Bull., Polar Proj. OP-O3A4, Perspectives in Modern Seismology, London, Springer, vol. 201, no. XVI:, pp. 169-184, (ISBN: 3-540-23712-7)
    Details
    Publication Date: 2005
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; Finite Element Method ; Modelling ; Three dimensional ; Seismology ; Early warning systems (earthquakes, volcanic eruptions, tsunamis etc.) ; Bucharest ; Romania ; Earthquake risk
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Contemporary tectonic stress pattern of the Taranaki Basin, New Zealand (2016)
    Wiley
    Details
    Publication Date: 2016-07-14
    Description: The present-day stress state is a key parameter in numerous geoscientific research fields including geodynamics, seismic hazard assessment and geomechanics of geo-reservoirs. The Taranaki Basin of New Zealand is located on the Australian Plate and forms the western boundary of tectonic deformation due to Pacific Plate subduction along the Hikurangi margin. This paper presents the first comprehensive wellbore-derived basin-scale in-situ stress analysis in New Zealand. We analyse borehole image and oriented caliper data from 129 petroleum wells in the Taranaki Basin to interpret the shape of boreholes and determine the orientation of maximum horizontal stress (S Hmax ). We combine these data (151 S Hmax data records) with 40 stress data records derived from individual earthquake focal mechanism solutions, six from stress inversions of focal mechanisms and one data record using the average of several focal mechanism solutions. The resulting data set has 198 data records for the Taranaki Basin and suggests a regional S Hmax orientation of N068°E (±22°), which is in agreement with NW-SE extension suggested by geological data. Furthermore, this ENE-WSW average S Hmax orientation is subparallel to the subduction trench and strike of the subducting slab (N50°E) beneath the central western North Island. Hence, we suggest that the slab geometry and the associated forces due to slab rollback are the key control of crustal stress in the Taranaki Basin. In addition, we find stress perturbations with depth in the vicinity of faults in some of the studied wells, which highlight the impact of local stress sources on the present-day stress rotation.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 7
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    Geomechanical model of the Marmara Sea region—I. 3-D contemporary kinematics (2011)
    Oxford University Press
    Details
    Publication Date: 2011-04-15
    Description: SUMMARY We investigate by means of a 3-D geomechanical model the relationship between structural elements and contemporary kinematics in the Marmara Sea region, northwest Turkey. The recently imaged fault system beneath the Marmara Sea is incorporated into the model as frictional surfaces with varying strike and dip. The Main Marmara Fault is implemented as through-going and is accompanied by mostly non-vertical second-order faults. Topography, basement-topography and the Moho become mechanically effective through changes in density and elastic parameters across these horizons. The model is subjected to gravity and kinematic boundary conditions. The ultimate goal of this study is to set up a 3-D model that is consistent with both, kinematic observations and stress data. The stress results are presented in a complementary paper. In this paper we present the modelled long-term 3-D kinematics in terms of fault slip rates, rotations, vertical motion and sense of fault slip. The model results agree with Global Positioning System velocities, geological fault slip rates, palaeomagnetic measurements and with the observed pattern of subsidence and uplift. Furthermore, our tectonically driven vertical velocities can be linked to landscape and basin evolution and to features of sedimentation. Our results indicate that the Main Marmara Fault can be interpreted as a through-going fault that slips almost purely in a strike-slip sense. Nevertheless, and not contradictory to the previous statement, there is significant dip-slip motion at some sections of the Main Marmara Fault. The agreement of the modelled 3-D kinematics with model-independent observations supports that the main structural details of the fault system are accounted for. Sensitivity analysis of model parameters reveals that changes in rock properties and the initial stress state have minor influence on the 3-D kinematics. We conclude that the 3-D structure of the fault system is the key control of the kinematics. The slip rate of the Main Marmara Fault from our model is lower than previous estimates and shows high variability along strike (12.8–17.8 mm a –1 ). The latter indicates that stress accumulation is non-uniform along strike.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 8
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    Geomechanical model of the Marmara Sea region—II. 3-D contemporary background stress field (2011)
    Oxford University Press
    Details
    Publication Date: 2011-04-15
    Description: SUMMARY We present the contemporary 3-D background stress field of the Marmara Sea region derived from a geomechanical model. The background stress field (i.e. the component of the absolute stress state that is time-independent over the seismic cycle) primarily depends on the distribution of density and elastic parameters, on the acting far-field stresses from plate boundary forces and on fault geometries. We take these into account to predict the 3-D background stress field including its spatial variations. Technically, our model concept involves the definition of an appropriate initial stress state accounting for the gravitational reference stress state of the crust, which is then changed by plate tectonics until the 3-D background stress field has evolved. The modelled stress field agrees well with observations from earthquake focal mechanism solutions and their formal stress inversion, with orientation of maximum horizontal stress and with the distribution of seismicity in the Marmara Sea. In particular in the vicinity of fault bends the stress field deviates considerably from the regional NW–SE oriented maximum horizontal stress and exhibits variability of the stress regime. Our model results are consistent not only with dynamic observations but also with kinematic ones. Various kinematic observations are understandable from the stress field. We show that a stress regime that indicates normal faulting in the basins is nonetheless reconcilable with almost pure strike-slip motion on the Main Marmara Fault. The distribution of seismicity in the Marmara Sea can be explained in first order by the distribution of critical differential stress, which is closely related to local fault geometries. We refer the wide absence of seismicity between the bend of the Main Marmara Fault near Istanbul and the Central basin to the relatively plane fault geometry of that segment. Normal stress on the Main Marmara Fault is highly variable along strike, which makes segment-wise rupture more likely than a rupture of the seismic gap at once. Comparably low normal stress on the Prince's Islands Segment indicates a shorter interevent time for this fault segment than for the central segment of the Main Marmara Fault.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 9
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    Locking of the Chile subduction zone controlled by fluid pressure before the 2010 earthquake (2014)
    Springer Nature
    Details
    Publication Date: 2014-03-29
    Description: Nature Geoscience 7, 292 (2014). doi:10.1038/ngeo2102 Authors: Marcos Moreno, Christian Haberland, Onno Oncken, Andreas Rietbrock, Samuel Angiboust & Oliver Heidbach Constraints on the potential size and recurrence time of strong subduction-zone earthquakes come from the degree of locking between the down-going and overriding plates, in the period between large earthquakes. In many cases, this interseismic locking degree correlates with slip during large earthquakes or is attributed to variations in fluid content at the plate interface. Here we use geodetic and seismological data to explore the links between pore-fluid pressure and locking patterns at the subduction interface ruptured during the magnitude 8.8 Chile earthquake in 2010. High-resolution three-dimensional seismic tomography reveals variations in the ratio of seismic P- to S-wave velocities (Vp/Vs) along the length of the subduction-zone interface. High Vp/Vs domains, interpreted as zones of elevated pore-fluid pressure, correlate spatially with parts of the plate interface that are poorly locked and slip aseismically. In contrast, low Vp/Vs domains, interpreted as zones of lower pore-fluid pressure, correlate with locked parts of the plate interface, where unstable slip and earthquakes occur. Variations in pore-fluid pressure are caused by the subduction and dehydration of a hydrothermally altered oceanic fracture zone. We conclude that variations in pore-fluid pressure at the plate interface control the degree of interseismic locking and therefore the slip distribution of large earthquake ruptures.
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
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  • 10
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    Estimation of the differential stress from the stress rotation angle in low permeable rock (2017)
    Wiley
    Details
    Publication Date: 2017-05-10
    Description: Rotations of the principal stress axes are observed as a result of fluid injection into reservoirs. We use a generic, fully coupled 3D thermo-hydro-mechanical model to investigate systematically the dependence of this stress rotation on different reservoir properties and injection scenarios. We find that permeability, injection rate, and initial differential stress are the key factors while other reservoir properties only play a negligible role. In particular, we find that thermal effects do not significantly contribute to stress rotations. For reservoir types with usual differential stress and reservoir treatment the occurrence of significant stress rotations is limited to reservoirs with a permeability of less than approximately 10 −12 m 2 . Higher permeability effectively prevents stress rotations to occur. Thus, according to these general findings the observed principal stress axes rotation can be used as a proxy of the initial differential stress provided that rock permeability and fluid injection rate are known a priori.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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