Sökning: "decollement"

Hittade 5 avhandlingar innehållade ordet decollement.

  1. 1. The Effect of Mechanical Characteristics of Basal Decollement and Basement Structures on Deformation of the Zagros Basin

    Författare :Abbas Bahroudi; John Cosgrove; Uppsala universitet; []
    Nyckelord :decollement; extension; Zagros; Hormuz salt; shortening; basement faults; Arabia; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : Two fundamental structural elements, basement architecture and basal decollement, play a significant role in the evolution of a tectonically active region. Using different approaches (field data, literature review and analogue models) this thesis demonstrates that these two elements affected the deformation style in the Zagros fold-thrust belt during Mesozoic extensional and Cenozoic contractional episodes. LÄS MER

  3. 2. Quantifying strain in analogue models simulating fold-and-thrust belts using magnetic fabric analysis

    Författare :Thorben Schöfisch; Hemin Koyi; Bjarne Almqvist; Stefan Luth; Ram Weinberger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; analogue modelling; AMS; fold-and-thrust belt; strain distribution; décollement friction; magnetic fabric analysis;

    Sammanfattning : Applying the anisotropy of magnetic susceptibility to analogue models provides detailed insights into the strain distribution and quantification of deformation within contractional tectonic settings like fold-and-thrust belts (FTBs). Shortening in FTBs is accommodated by layer-parallel shortening, folding, and thrusting. LÄS MER

  4. 3. Inversion of Magnetotelluric Data Constrained by Borehole Logs and Reflection Seismic Sections

    Författare :Ping Yan; Thomas Kalscheuer; Laust Pedersen; Maria Garcia Juanatey; Andreas Junge; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetotellurics; constrained inversion; borehole logs; seismic; COSC; Alnö alkaline and carbonatite; airborne VLF; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Sammanfattning : This thesis presents two new algorithms for doing constrained Magnetotelluric (MT) inversion based on an existing Occam 2D inversion program. The first algorithm includes borehole resistivity logs as prior information to constrain resistivity directly in the vicinity of boreholes. LÄS MER

  5. 4. Ground Movements in the Zagros Fold-Thrust Belt of SW Iran Measured by GPS and InSAR Compared to Physical Models

    Författare :Faramarz Nilfouroushan; Christopher Talbot; Hemin Koyi; Christophe Vigny; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Zagros fold-thrust belt; deformation; GPS; InSAR; Physical modeling; tectonics; convergent settings; basal friction; Geovetenskap;

    Sammanfattning : This thesis uses geodetic satellite data to measure present-day crustal deformation in the Zagros fold-thrust belt (SW Iran). Geodetic-type measurements are also used in down-scaled models that simulate the surface deformations seen in convergent settings like the Zagros fold-thrust belt. LÄS MER

  7. 5. Deformation zones in models and nature

    Författare :Katarina Sofia Persson; Carl Ehlers; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : Field studies encounter several complicating factors not studied in the models. Examples are oblique convergence, heterogeneous materials and thermal softening by intruding magmas. LÄS MER