Backlimb trishear: A kinematic model for curved folds developed over angular fault bends

Numerous analog models and some natural examples display smoothly curving backlimb fold hinges over sharp, angular bends in the underlying thrust surface. We present a new kinematic model that can reproduce this geometry by triangular zone focused on the fault bend. The model presupposes incompressi...

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Autor principal: Cristallini, Ernesto Osvaldo
Otros Autores: Allmendinger, R.W
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2002
Acceso en línea:Registro en Scopus
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100 1 |a  Cristallini, Ernesto Osvaldo 
245 1 0 |a Backlimb trishear: A kinematic model for curved folds developed over angular fault bends 
260 |c 2002 
270 1 0 |m Cristallini, E.O.; Departamento Ciencias Geologicas, Ciudad de Buenos Aires, Argentina; email: ernesto@gl.fcen.uba.ar 
504 |a Berger, P., Johnson, A.M., First-order analysis of deformation of a thrust sheet moving over a ramp (1983) Tectonophysics, 70, pp. T9-T24 
504 |a Chester, J.S., Logan, J.M., Spang, J.H., Influence of layering and boundary conditions on fault-bend and fault-propagation folding (1991) Geological Society of America Bulletin, 103, pp. 1059-1072 
504 |a Erslev, E.A., Trishear fault-propagation folding (1991) Geology, 19, pp. 617-620 
504 |a Hardy, S., A method for quantifying the kinematics of fault-bend folding (1995) Journal of Structural Geology, 17, pp. 1785-1788 
504 |a Johnson, A.M., Berger, P., Kinematics of fault-bend folding (1989) Engineering Geology, 27, pp. 181-200 
504 |a Mase, G.E., Mase, G.T., (1992) Continuum Mechanics for Engineers, , CRC Press, Boca Raton 
504 |a Morse, J., Deformation in ramp regions of overthrust faults: Experiments with small-scale rock model (1977) Joint Wyoming-Montana-Utah Geological Association Guidebook, pp. 457-470. , Rocky Mountain Thrust Belt Geology and Resources, 29th Annual Field Conference, Wyoming Geological Association 
504 |a Ormand, C.J., Hudleston, P.J., Analog models of fault-bend folding: The effects of oblique ramping and tear faulting on hanging wall strcutures (1999) Geological Society of America, , Annual Meeting, 1999. Abstract 51868 
504 |a Serra, S., Styles of deformation in the ramp region of overthrust faults (1977) Joint Wyoming-Montana-Utah Geological Associations Guidebook, pp. 487-498. , Rocky Mountain Thrust Belt Geology and Resources. 29th Annual Field Conference, Wyoming Geological Asociation 
504 |a Suppe, J., Geometry and Kinematics of fault-bend folding (1983) American Journal of Science, 283, pp. 684-721 
504 |a Suppe, J., Mendwedeff, D., Geometry and kinematics of fault-propagation folding (1990) Eclogae Geol. Helv, 83, pp. 409-454 
504 |a White, N.J., Jackson, J.A., McLemzoe, D.P., The relationship between the geometry of normal faults and that of the sedimentary layers in their hanging walls (1986) Journal of Structural Geology, 8, pp. 897-909 
504 |a Zehnder, A.T., Allmendinger, R.W., Velocity field for the trishear model (2000) Journal of Structural Geology, 22, pp. 1009-1014 
506 |2 openaire  |e Política editorial 
520 3 |a Numerous analog models and some natural examples display smoothly curving backlimb fold hinges over sharp, angular bends in the underlying thrust surface. We present a new kinematic model that can reproduce this geometry by triangular zone focused on the fault bend. The model presupposes incompressible flow in the triangular zone and makes common assumptions about velocities on either side of the fault bend. Either symmetric or asymmetric triangular zones can be defined, with parallel kink folding and similar folding being special cases of the two, respectively, where the apical angle of the triangular zone is zero. The results of the numerical model compare well to analog experiments. The model is conceptually analogous to forelimb at the tip of a propagating fault and hence we refer to it as 'backlimb trishear'. © 2001 Published by Elsevier Science Ltd.  |l eng 
536 |a Detalles de la financiación: American Chemical Society 
536 |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica, BID 802/OC-AR-PICT 00538 
536 |a Detalles de la financiación: American Chemical Society Petroleum Research Fund 
536 |a Detalles de la financiación: National Science Foundation, EAR-9814348 
536 |a Detalles de la financiación: We thank Judith Chester and Stuart Hardy for reviews of this manuscript. Supported by a grant to Cristallini from the Agencia Nacional de Promoción CientÍfica y Tecnológica (proyecto BID 802/OC-AR-PICT 00538) and NSF grant EAR-9814348 to Allmendinger. Acknowledgment is also made to the donors of The Petroleum Research Fund, administered by the ACS, for partial support of this research. 
593 |a Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14853, United States 
593 |a CONICET - Departamento De Ciencias Geológicas, Universidad De Buenos Aires, Argentina 
593 |a Departamento De Ciencias Geológicas Ciudad Universitaria, Pabellon II, (C1428EHA), Ciudad de Buenos Aires, Argentina 
690 1 0 |a ANGULAR FAULT BENDS 
690 1 0 |a BACKLIMB TRISHEAR 
690 1 0 |a GROWTH STRATA 
690 1 0 |a KINEMATIC MODEL 
690 1 0 |a TRIANGULAR ZONES 
690 1 0 |a GEOMETRY 
690 1 0 |a INCOMPRESSIBLE FLOW 
690 1 0 |a NUMERICAL METHODS 
690 1 0 |a VELOCITY 
690 1 0 |a KINEMATICS 
690 1 0 |a DEFORMATION 
690 1 0 |a FAULTING 
690 1 0 |a FOLDING 
690 1 0 |a KINEMATICS 
690 1 0 |a MODELING 
690 1 0 |a SHEAR 
700 1 |a Allmendinger, R.W. 
773 0 |d 2002  |g v. 24  |h pp. 289-295  |k n. 2  |p J. Struct. Geol.  |x 01918141  |w (AR-BaUEN)CENRE-335  |t Journal of Structural Geology 
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