Shear wave modeling and Poisson's ratio in the Variscan Belt of SW Iberia

Geochemistry, Geophysics, Geosystems

Volumn 12, Issue 7, 2011, Pages

  Palomeras, I ^a,d   Carbonell, R ^a   Ayarza, P ^b   Marti D ^a   Brown, D ^a   Simancas, J F ^c  

^a INSTITUTE OF EARTH SCIENCES JAUME ALMERA   (Spain)

^b UNIVERSITY OF SALAMANCA   (Spain)

^c UNIVERSITY OF GRANADA   (Spain)

^d RICE UNIVERSITY   (United States)

Author keywords

Poisson's Ratio; S wave modeling; SW Iberia; Variscan Belt; Wide angle

Indexed keywords

ACOUSTIC WAVE VELOCITY; FLEXIBLE COUPLINGS; SEISMIC WAVES; SHEAR FLOW; SHEAR WAVES; TECTONICS; TIN; WAVE PROPAGATION; POISSON RATIO; RAY TRACING;

POISSON'S RATIO; S-WAVE MODELING; SW-IBERIA; VARISCAN BELT; WIDE-ANGLE; S-WAVE MODELS;

POISSON RATIO; SHEAR FLOW;

FELSIC ROCK; MAFIC ROCK; MOHO; P-WAVE; POISSON RATIO; S-WAVE; SEISMIC REFLECTION; SEISMIC REFRACTION; SEISMIC VELOCITY; ULTRAMAFIC ROCK; WAVE MODELING;

IBERIAN PENINSULA;

EID: 79960661194     PISSN: None     EISSN: 15252027     Source Type: Journal    
DOI: 10.1029/2011GC003577     Document Type: Article

References (45)

1. Araújo, A., P. Fonseca, J. Munhá, P. Moita, J. Pedro, and A. Ribeiro (2005), The Moura Phyllonitic Complex: Na Accretionary Complex related with the obduction in the southern Iberia Variscan Suture, Geodin. Acta, 18, 375-383.
2. Ayarza, P., I. Palomeras, R. Carbonell, J. Afonso, and F. Simancas (2010), A wide-angle upper mantle reflector in SW Iberia: Some constraints on its nature, Phys. Earth Planet. Inter., 181(3-4), 88-102, doi:10.1016/j.pepi. 2010.05.004.
3. Azor, A., F. González-Lodeiro, and J. Simancas (1994), Tectonic evolution of the boundary between the Central Iberian and Ossa-Morena zones (Variscan Belt, Southwest Spain), Tectonics, 13, 45-61, doi:10.1029/93TC02724. (Pubitemid 24425165)
4. Azor, A., D. Rubatto, J. Simancas, F. González-Lodeiro, D. Martínez-Poyatos, L. Martín-Parra, and J. Matas (2008), Reic Ocean ophiolitic remnants in southern Iberia questioned by SHRIMP U-Pb zircon ages of Beja-Acebuches amphibolites, Tectonics, 27, TC5006, doi:10.1029/ 2008TC002306.
5. Brown, D., R. Carbonell, I. Kukkonen, C. Ayala, and I. Golovanova (2003), Composition of the Uralide crust from seismic velocity (V-p, V-s), heat flow, gravity, and magnetic data, Earth Planet. Sci. Lett., 210(1-2), 333-349, doi:10.1016/S0012-821x(03)00143-2. (Pubitemid 36639896)
6. Burg, J., M. Iglesias, P. Laurent, P. Matte, and A. Ribeiro (1981), Variscan intracontinental deformation: The Coimbra-Córdoba Shear zone (SW Iberian Peninsula), Tectonophysics, 78, 161-177, doi:10.1016/0040-1951(81) 90012-3.
7. Carbonell, R., F. Simancas, C. Juhlin, J. Pous, A. Pérez- Estaún, F. González-Lodeiro, G. Muñoz, W. Heise, and P. Ayarza (2004), Geophysical evidence of a mantle derived intrusion in SW Iberia, Geophys. Res. Lett., 31, L11601, doi:10.1029/2004GL019684. (Pubitemid 39103509)
8. Carmichael, R. S. (1989), Physical Properties of Rocks and Minerals, CRC Press, Boca Raton, Fla.
9. Casquet, C., C. Galindo, F. Tornos, F. Velasco, and A. Canales (2001), The Aguablanca Cu-Ni ore deposit (Extremadura, Spain), a case of synorogenic orthomagmatic mineralization: Age and isotope composition of magmas (Sr, Nd) and ore (S), Ore Geol. Rev., 18, 237-242, doi:10.1016/S0169- 1368(01)00033-6.
10. Castro, A., C. Fernández, J. de la Rosa, I. Moreno-Ventas, and G. Rogers (1996), Significance of MORB-derived amphibolites from the Aracena metamorphic belt, southwest Spain, J. Petrol., 37, 235-260. (Pubitemid 126607302)
11. Christensen, N. (1996), Poisson's ratio and crustal seismology, J. Geophys. Res., 101(2), 3139-3156.
12. Christensen, N., and W. Mooney (1995), Seismic velocity structure and composition of the continental crust: A global view, J. Geophys. Res., 100(B6), 9761-9788, doi:10.1029/ 95JB00259.
13. Eden, P., and J. Andrews (1990), Middle to Upper Devonian mélanges in SW Spain and their relationship to the Meneage Formation in South Cornwall, Proc. Ussher Soc., 7, 217-222.
14. Fernàndez, M., I. Marzán, and M. Torne (2004), Lithospheric transition from the Variscan Iberian Massif to the Jurassic oceanic crust of the central Atlantic, Tectonophysics, 386(1-2), 97-115, doi:10.1016/j.tecto. 2004.05.005. (Pubitemid 39239098)
15. Flecha, I., I. Palomeras, R. Carbonell, F. Simancas, P. Ayarza, J. Matas, F. González-Lodeiro, and A. Peréz-Estaún (2009), Seismic imaging and modelling of the lithosphere of SW-Iberia, Tectonophysics, 472(1-4), 148-157,doi:10.1016/ j.tecto.2008.05.033.
16. Fonseca, P., and A. Ribeiro (1993), Tectonics of the Beja- Acebuches Ophiolite: A major suture in the Iberian Variscan Foldbelt, Geol. Rundsch., 82, 440-447. (Pubitemid 24420603)
17. Fonseca, P., J. Munhá, F. Rosas, P. Moita, A. Araujo, and N. Leal (1999), Variscan ophiolites and high-pressure metamorphism in southern Iberia, Ofioliti, 24, 259-268. (Pubitemid 30146685)
18. Gómez-Pugnaire, M., A. Azor, J. Fernández-Soler, and V. L. Sánchez-Vizcaíno (2003), The amphibolites from the Ossa- Morena/Central Iberian Variscan suture (Southwestern Iberian Massif): Geochemistry and tectonic interpretation, Lithos, 68, 23-42, doi:10.1016/S0024-4937(03)00018-5. (Pubitemid 36533361)
19. Hauser, F., B. M. O'Reilly, P. W. Readman, J. S. Daly, and R. van den Berg (2008), Constraints on crustal structure and composition within a continental suture zone in the Irish Caledonides from shear wave wide-angle reflection data and lower crustal xenoliths, Geophys. J. Int., 175(3), 1254-1272, doi:10.1111/j.1365-246X.2008.03945.x.
20. Hawman, R. B., R. H. Colburn, D. A. Walker, and S. B. Smithson (1990), Processing and inversion of refraction and wide-angle reflection data from Nevada Passcal Experiment, J. Geophys. Res., 95(B4), 4657-4691.
21. Holbrook, W. (1988), An interpretation of wide-angle compressional and shear wave data in southwest Germany: Poisson's ratio and petrological implications, J. Geophys. Res., 93(B10), 12,081-12,106.
22. Jacob, A. W. B., and D. C. Booth (1977), Observation of PS reflections from the Moho, J. Geophys., 43, 687-692.
23. Janik, T., E. Kozlovskaya, P. Heikkinen, J. Yliniemi, and H. Silvennoinen (2009), Evidence for preservation of crustal root beneath the Proterozoic Laplan-Kola orogen (northern Fennoscandian shield) derived from P and S wave velocity models of POLAR and HUKKA wide-angle reflection and refraction profiles and FIRE4 reflection transect, J. Geophys. Res., 114, B06308, doi:10.1029/2008JB005689.
24. Matte, P. (2001), The Variscan collage and orogeny (480- 290 Ma) and the tectonic definition of the Armonica microplate: A review, Terra Nova, 13, 122-128. (Pubitemid 33127684)
25. Oliveira, J. (1990), Stratigraphy and synsedimentary tectonism, in Pre-Mesozoic Geology of Iberia, part VI, South Portuguese Zone, pp. 348-362, Springer, Berlin.
26. Ordoñez Casado, B. (1998), Geochronological studies of the pre-Mesozoic basement of the Iberian Massif: The Ossa-Morena zone and the allochthonous complexes within the Central Iberian zone, Ph.D. thesis, ETH Zurich, Zurich, Switzerland.
27. Palomeras, I., et al. (2009), The nature of the lithosphere across the Variscan Orogen of SW-Iberia: Dense wide-angle seismic reflection data, J. Geophys. Res., 114, B02302, doi:10.1029/2007JB005050.
28. Palomeras, I., R. Carbonell, P. Ayarza, M. Fernández, F. J. Simancas, D. Martínez Poyatos, F. González-Lodeiro, and A. Pérez-Estaún (2011), Geophysical model of the lithosphere across the Variscan Belt of SW-Iberia: Multidisciplinary assessment, Tectonophysics, doi:10.1016/j. tecto.2010.07.010, in press.
29. Pérez-Estaún, A., and F. Bea (2004), Macizo Ibérico, in Geología de España, pp. 21-230, Soc. Geol. de España, Madrid.
30. Pin, C., and J. Rodríguez (2009), Comment on "Rheic Ocean ophiolitic remnants in southern Iberia questioned by SHRIMP U-Pb zircon ages on the Beja-Acebuches amphiolites" by A. Azor et al., Tectonics, 28, TC5013, doi:10.1029/ 2009TC002495.
31. Pous, J., G. Muñoz, W. Heise, J. Melgarejo, and C. Quesada (2004), Electromagnetic imaging of Variscan crustal structures in SW Iberia: The role of interconnected graphite, Earth Planet. Sci. Lett., 217(3-4), 435-450, doi:10.1016/ S0012-821X(03)00612-5. (Pubitemid 38106848)
32. Quesada, C., P. Fonseca, J. Munhá, J. Oliveira, and A. Ribeiro (1994), The Beja-Acebuches Ophiolite (Southern Iberia Variscan fold belt): Geological characterization and geodynamic significance, Bol. Geol. Minero, 105, 3-49. (Pubitemid 24428561)
33. Robardet, M., and J. Gutíerrez-Marco (2004), The Ordovician, Silurian and Devonian sedimentary rocks of the Ossa- Morena Zone (SW Iberian Peninsula, Spain), J. Iberian Geol., 30, 73-92.
34. Sáez, R., E. Pascual, M. Toscano, and G. R. Almodóvar (1999), The Iberian type of volcano-sedimentary massive sulphide deposits, Mineral. Deposita, 34, 549-570. (Pubitemid 29511406)
35. Schmelzbach, C., J. Simancas, C. Juhlin, and R. Carbonell (2008), Seismic-reflection imaging over the South Portuguese Zone Fold-and-Thrust belt, SW Iberia, J. Geophys. Res., 113, B08301, doi:10.1029/2007JB005341.
36. Shillington, D. J., H. Van Avendonk, W. D. Holbrook, P. B. Kelemen, and M. J. Hornbach (2004), Composition and structure of the central Aleutian island arc from arc-parallel wide-angle seismic data, Geochem. Geophys. Geosyst., 5, Q10006, doi:10.1029/2004GC000715.
37. Simancas, F., D. M. Poyatos, I. Expósito, A. Azor, and F. González-Lodeiro (2001), The structure of a major suture zone in the SW Iberian Massif: The Ossa-Morena/Central Iberian contact, Tectonophysics, 332(1-2), 295-308, doi:10.1016/S0040-1951(00)00262-6. (Pubitemid 32473634)
38. Simancas, F., et al. (2003), Crustal structure of the transpressional Variscan orogen of SW Iberia: SW Iberia deep seismic reflection profile (IBERSEIS), Tectonics, 22(6), 1062, doi:10.1029/2002TC001479.
39. Simancas, J. F., et al. (2006), Transpresional collision tectonics and mantle plume dynamics: The Variscides of southwestern Iberia, in European Lithosphere Dynamics, vol. 32, pp. 345-354, Geol. Soc., London. (Pubitemid 46055449)
40. Simancas, J., A. Azor, D. M. Poyatos, A. Tahiri, H. E. Hadi, F. González-Lodeiro, A. Pérez-Estaún, and R. Carbonell (2009), Tectonic relationships of southwest Iberia with the allochthons of northwest Iberia and the Moroccan Variscides, C. R. Geosci., 341, 103-113, doi:10.1016/j.crte.2008.11.003.
41. Tornos, F., and C. Casquet (2005), A new scenario for related IOCG and Ni-(Cu) mineralization: The relationship with giant mid-crustal mafic sills, Variscan Iberian Massif, Terra Nova, 17(3), 236-241, doi:10.1111/j.1365-3121. 2005. 00601.x. (Pubitemid 40864886)
42. Tornos, F., C. Casquet, C. Galindo, F. Velasco, and A. Canales (2001), A new style of Ni-Cu mineralization related to magmatic breccia pipes in a transpressional magmatic arc, Aguablanca, Mineral. Deposita, 36, 700-706, doi:10.1007/ s001260100204. (Pubitemid 33038198)
43. Wang, Q., and J. Shaocheng (2009), Poisson's ratios of crystalline rocks as a function of hydrostatic confining pressure, J. Geophys. Res., 114, B09202, doi:10.1029/2008JB006167.
44. Zelt, C., and R. Smith (1992), Seismic traveltime inversion for 2-D crustal velocity structure, Geophys. J. Int., 108(1), 16-34.
45. Zeyen, H., and M. Fernàndez (1994), Integrated lithospheric modeling combining thermal, gravity, and local isostacy analysis:Application to theNESpanishGeotransect, J. Geophys. Res., 99, 18,089-18,102.