Tectonic overpressure in weak crustal-scale shear zones and implications for the exhumation of high-pressure rocks

Geophysical Research Letters

Volumn 40, Issue 10, 2013, Pages 1984-1988

  Schmalholz, Stefan M ^a   Podladchikov, Yuri Y ^a  

^a UNIVERSITY OF LAUSANNE   (Switzerland)

Author keywords

numerical modelling; shear zone; tectonic overpressure

Indexed keywords

CRUSTAL-SCALE SHEAR ZONES; HIGH-PRESSURE ROCKS; LITHOSPHERIC DEFORMATION; LITHOSTATIC PRESSURE; OVERPRESSURE; SHEAR ZONE; THERMO-MECHANICAL COUPLING; TWO-DIMENSIONAL NUMERICAL SIMULATION;

COMPUTER SIMULATION; GEODYNAMICS; NUMERICAL MODELS;

TECTONICS;

CRUSTAL STRUCTURE; GEODYNAMICS; HIGH PRESSURE; LITHOSPHERE; NUMERICAL MODEL; ROCK; SHEAR ZONE; TECTONIC STRUCTURE; TEMPERATURE EFFECT; TWO-DIMENSIONAL MODELING; VISCOSITY;

EID: 84879926429     PISSN: 00948276     EISSN: 19448007     Source Type: Journal    
DOI: 10.1002/grl.50417     Document Type: Article

References (27)

1. Berger, A., et al. (2011), Mechanisms of mass and heat transport during Barrovian metamorphism: A discussion based on field evidence from the central Alps (Switzerland/northern Italy), Tectonics, 30, 1-17.
2. Brace, W. F., et al. (1970), An experimental study of tectonic overpressure in Franciscan rocks, Geological Society of America Bulletin, 81 (5), 1325 -&.
3. Burg, J. P., and, T. V. Gerya, (2005), The role of viscous heating in Barrovian metamorphism of collisional orogens: Thermomechanical models and application to the Lepontine dome in the central Alps, J. Metamorph. Geol., 23 (2), 75-95.
4. Burg, J. P., and, S. M. Schmalholz, (2008), Viscous heating allows thrusting to overcome crustal-scale buckling: Numerical investigation with application to the Himalayan syntaxes, Earth and Planet. Sci. Lett., 274, 189-203.
5. Burov, E., et al. (2001), A thermomechanical model of exhumation of high pressure (HP) and ultra-high pressure (UHP) metamorphic rocks in Alpine-type collision belts, Tectonophysics, 342 (1-2), 113-136.
6. Crameri, F., and, B. J. P. Kaus, (2010), Parameters that control lithospheric-scale thermal localization on terrestrial planets, Geophys. Res. Lett., 37, doi: 10.1029/2010GL042921.
7. Dabrowski, M., et al. (2008), MILAMIN: MATLAB-based finite element method solver for large problems, Geochem. Geophys. Geosyst., 9, doi: 10.1029/2007GC001719.
8. Escher, A., and, C. Beaumont, (1997), Formation, burial and exhumation of basement nappes at crustal scale: A geometric model based on the Western Swiss-Italian Alps, J. Struct. Geol., 19 (7), 955-974.
9. Gerya, T. V., et al. (2008), Transient hot channels: Perpetrating and regurgitating ultrahigh-pressure, high-temperature crust-mantle associations in collision belts, Lithos, 103 (1-2), 236-256.
10. Hartz, E. H., and, Y. Y. Podladchikov, (2008), Toasting the jelly sandwich: The effect of shear heating on lithospheric geotherms and strength, Geology, 36 (4), 331-334.
11. Jamieson, R. A., et al. (1998), Barrovian regional metamorphism: Where's the heat?, in What Drives Metamorphism and Metamorphic Reactions?, edited by, P. J. Treloar, and, P. J. O'Brien, pp. 23-51, Geological Society Special Publications, London.
12. Jolivet, L., et al. (2003), Subduction tectonics and exhumation of high-pressure metamorphic rocks in the Mediterranean orogens, Am. J. Sci., 303 (5), 353-409.
13. Kaus, B. J. P., and, Y. Y. Podladchikov, (2006), Initiation of localized shear zones in viscoelastoplastic rocks, J. Geophys. Res.-Solid Earth, 111, doi: 10.1029/2005JB003652.
14. Kaus, B. J. P., et al. (2010), A stabilization algorithm for geodynamic numerical simulations with a free surface, Phys. Earth Planet. Inter., 181 (1-2), 12-20.
15. Li, Z. H., et al. (2010), Influence of tectonic overpressure on P-T paths of HP-UHP rocks in continental collision zones: Thermomechanical modelling, J. Metamorph. Geol., 28 (3), 227-247.
16. Mancktelow, N. S., (2008), Tectonic pressure: Theoretical concepts and modelled examples, Lithos, 103 (1-2), 149-177.
17. Merle, O., (1998), Emplacement Mechanisms of Nappes and Thrust Sheets, Kluwer Academic Publisher, Dordrecht.
18. Molnar, P., and, H. Lyon-Caen, (1988), Some simple physical aspects of the support, structure and evolution of mountain belts, Geol. Soc. Am. Spec. Paper, 218, 179-207.
19. Nagel, T. J., (2008), Tertiary subduction, collision and exhumation recorded in the Adula nappe, central Alps, in Tectonic Aspects of the Alpine-Dinaride-Carpathian System, edited by, S. Siegesmund, et al., pp. 365-392, London, The Geological Society of London.
20. Ogawa, M., (1987), Shear instability in a viscoelastic material as the cause of deep-focus earthquakes, J. Geophys. Res.-Solid Earth and Planets, 92 (B13), 13801-13810.
21. Petrini, K., and, Y. Podladchikov, (2000), Lithospheric pressure-depth relationship in compressive regions of thickened crust, J. Metamorph. Geol., 18 (1), 67-77.
22. Schmalholz, S. M., et al. (2009), Stress-strength relationship in the lithosphere during continental collision, Geology, 37 (9), 775-778.
23. Schreyer, W., (1995), Ultradeep metamorphic rocks-The retrospective viewpoint, J. Geophys. Res.-Solid Earth, 100 (B5), 8353-8366.
24. Shewchuk, J. R., (2002), Delaunay refinement algorithms for triangular mesh generation, Computational Geometry-Theory and Applications, 22 (1-3), 21-74.
25. Steck, A., (1990), Une carte des zones de cisaillement ductile des Alpes Centrales, Eclogae Geol. Helv., 83 (3), 603-627.
26. Thielmann, M., and, B. J. P. Kaus, (2012), Shear heating induced lithospheric-scale localization: Does it result in subduction?, Earth Planet. Sci. Lett., 359, 1-13.
27. Todd, C. S., and, M. Engi, (1997), Metamorphic field gradients in the central Alps, J. Metamorph. Geol., 15 (4), 513-530.