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Abstract:

Modeling of broadband seismic waveforms recorded by global and Chilean networks for two moderate crustal earthquakes of the northwestern Sierras Pampeanas shows their focal mechanisms, depths and seismotectonic features. The magnitude Mw 5.8 earthquake on 28 May 2002, located in the eastern flank of the sierra de Velasco and the Mw 6.2 earthquake on 7 September 2004, with epicenter in the southwestern part of the sierra de Ambato, have shallow focal depths of 10 and 8 km, respectively. These results combined with the historical seismicity of the region allow us to estimate the deep structure of the Sierras Pampeanas in the study region. The seismic analyses together with interpretations of the surface structure and previous neotectonic studies ruled out extensional or strike slip deformation as the main responsible mechanism of the Present structure of this sector of the sierras de Ambato and Velasco in the northwestern Sierras Pampeanas. The comparison between the Nazca-South America plate convergence orientation as well as GPS velocities in the upper plate with the summation of the seismic moment tensor for the largest seismic energy released by crustal earthquakes of this region in the last 30 years, shows a clockwise rotation of 50° of the average P-axis orientation from the convergence orientation to the northeast suggesting important strain partition. This partition is controlled by the Eopaleozoic basement fabric, which has guided the orientation and vergence of the Andean faults.

Registro:

Documento: Artículo
Título:The Andean structure of the Sierras Pampeanas based on earthquake focal mechanisms in their Northwestern region
Autor:Alvarado, P.; Ramos, V.A.
Filiación:Departamento de Geofísica y Astronomía, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, CONICET, Argentina
Laboratorio de Tectónica Andina, IdEAN, CONICET - Universidad de buenos Aires, Argentina
Palabras clave:Andes; Compressive deformation; Decollement levels; Earthquakes; basement rock; compression; crustal structure; decollement; deformation; earthquake epicenter; earthquake magnitude; earthquake mechanism; focal mechanism; modeling; seismic moment; seismicity; seismotectonics; strain; strike-slip fault; waveform analysis; Ambato; Argentina; Catamarca; Sierras Pampeanas
Año:2010
Volumen:67
Número:4
Página de inicio:461
Página de fin:472
Título revista:Revista de la Asociacion Geologica Argentina
Título revista abreviado:Rev. Asoc. Geol. Argent.
ISSN:00044822
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00044822_v67_n4_p461_Alvarado.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p461_Alvarado

Referencias:

  • Aceñolaza, F.G., Bortolotti, P., Estratigrafía y evolución tectónica de la Quebrada de La Rioja (in 1st La Rioja Geology Symposium) (1981) Acta Geológica Lilloana, 15 (3), pp. 31-39
  • Alvarado, P., Beck, S., Source characterization of the San Juan (Argentina) crustal earthquakes of 15 January 1944 (Mw 7.0) and 11 June 1952 (Mw 6.8) (2006) Earth and Planetary Science Letters, 243, pp. 615-631
  • Alvarado, P., Ramos, V.A., Earthquake deformation in the northwestern Sierras Pampeanas of Argentina based on seismic waveform modeling (2011) Journal of Geodynamics, 51 (4), pp. 205-218
  • Alvarado, P., Beck, S., Zandt, G., Araujo, M., Triep, E., Crustal deformation in the south-central Andes back-arc terranes as viewed from regional broadband seismic waveform modelling (2005) Geophysical Journal International, 163, pp. 580-598
  • Alvarado, P., Pardo, M., Gilbert, H., Miranda, S., Anderson, M., Saez, M., Beck, S., Flatslab subduction and crustal models for the seismically active Sierras Pampeanas region of Argentina (2009) Backbone of the Americas: Shallow Subduction, Plateau Uplift, and Ridge and Terrane Collision, 204, pp. 261-278. , En Kay, S.M., Ramos, V.A. y dickinson, W. (eds.), Geological Society of America, Memoir, Colorado
  • Alvarado, P., Barrientos, S., Saez, M., Astroza, M., Beck, S., Source study and tectonic implications of the historic 1958 Las Melosas crustal earthquake, Chile, compared to earthquake damage (2009) Physics of the Earth and Planetary Interiors, 175, pp. 26-36
  • Alvarado, P., Gilbert, H., Richardson, T., Anderson, M., Martino, R., (2010) Lithospheric Deformation Overlying a Shallowly Subducting Slab: Insights From the Eastern Sierras Pampeanas Seismic Array, , AGu Fall Meeting, Article Id: T13d-03, California
  • Araujo, M.A., Pérez, A.M., Millán, M.H., (2005) The Last Destructive Earthquakes Occurred In La Rioja (05-28-2002) and Catamarca (09-07- 2004), Northwestern Pampean Ranges, Argentina, pp. 53-56. , 6th International Symposium on Andean Geodynamic. Extended Abstracts, barcelona
  • Assumpção, M., The regional intraplate stress field in South America (1992) Journal of Geophysical Research, 97 (b8), pp. 11889-11903
  • Astini, R., Ramos, V.A., Benedetto, J.L., Vaccari, N.E., (1996) La Precordillera: Un Terreno Exótico a Gondwana, 5, pp. 293-324. , 13° Congreso Geológico Argentino y 3° Congreso Exploración de Hidrocarburos, Actas, buenos Aires
  • Barazangi, M., Isacks, B., Spatial distribution of earthquakes and subduction of the Nazca plate beneath South America (1976) Geology, 4, pp. 686-692
  • Brooks, B.A., Bevis, M., Smalley, R., Kendrick, E., Manceda, R., Lauría, E., Maturana, R., Araujo, M., Crustal motion in the Southern Andes (26°-36°S): Do the Andes behave like a microplate? (2003) Geochemical, Geophysical, Geosystems, p. 4. , doi: 10.1029/2003GC000505
  • Butler, R.W.H., The nature of' roof thrusts in the Moine Thrust belt, NW Scotland: Implications for the structural evolution of thrust belts (2004) Journal of the Geological Society, 161 (5), pp. 849-859
  • Cahill, T., Isacks, B., Seismicity and shape of the subducted Nazca plate (1992) Journal of Geophysical Research, 97, pp. 17503-17529
  • Casa, A.L., Yamin, M.G., Cegarra, M.I., Coppolecchia, M., Costa, C.H., (2010) Deformación Cuaternaria Asociada Al Frente De Levantamiento Oriental De Las Sierras De Velasco Y Ambato, 67 (4), pp. 425-438. , Revista de la Asociación Geológica Argentina
  • Cembrano, J., Lavenu, A., Yañez, G., Riquelme, R., García, M., González, G., Hérail, G., Neotectonics (2007) The Geology of Chile, pp. 231-261. , En Moreno, T. y Gibbons, W. (eds), The Geological Society, Special Publications, London
  • (2010) Centro Regional De Sismología Para América Del Sur, , www.ceresis.org, CERESIS, Intensidades sísmicas para los terremotos destructivos de Argentina, on-line catalogue
  • Chinn, D., Isacks, B., Accurate source depths and focal mechanisms of shallow earthquakes in western South America and in the New Hebrides Island arc (1983) Tectonics, 2 (6), pp. 529-563
  • Comínguez, A.H., Ramos, V.A., La estructura profunda entre la Precordillera y Sierras Pampeanas (Argentina): Evidencias de la sísmica de reflexión profunda (1991) Revista Geológica De Chile, 18 (1), pp. 3-14
  • Costa, C., Neotectónica (2008) Peligrosidad Sísmica En La Sierra De Velasco, 14, pp. 30-73. , SEGEMAR, Serie Contribuciones Técnicas
  • Cristallini, E.O., Cominguez, A.H., Ramos, V.A., Mercerat, E.D., Basement double-wedge thrusting in the northern Sierras Pampeanas of Argentina (27o S); constraints from deep seismic reflection (2004) Thrust Tectonics and Hydrocarbon Systems, 82, pp. 65-90. , En McClay, K. (ed.), American Association of Petroleum Geologists, Memoir, Tulsa
  • Demets, C., Gordon, R.G., Argus, D.F., Geologically current plate motions (2010) Geophysical Journal International, 181 (1), pp. 1-80
  • Engdahl, E.R., van der Hilst, R., Buland, R., Global teleseismic earthquake relocation with improved travel times and procedures for depth determination (1998) Bulletin of the Seismological Society of America, 88, pp. 722-743
  • Eremchuk, J.E., (1984) Fracturas Del Borde Occidental De Las Sierras De Ambato-Manchao, Provincial De Catamarca, 2, pp. 362-367. , 9° Congreso Geológico Argentino, Actas, S.C. bariloche
  • Erslev, E.A., Trishear fault-propagation folding (1991) Geology, 19, pp. 617-620
  • Erslev, E.A., Koenig, N.V., Three-dimensional kinematics of Laramide, basement-involved Rocky Mountain deformation, uSA: Insigths from minor faults and GIS-enhanced structure maps (2009) Backbone of the Americas: Shallow Subduction, Plateau Uplift, and Ridge and Terrane Collision, 204, pp. 125-150. , En Kay, S.M., Ramos, V.A. y dickinson, W. (eds.), Geological Society of America, Memoirs, Colorado
  • Fidalgo, F., (1963) Algunos Rasgos Tectónicos Y Geomorfológicos De La Sierra De Sañogasta-Vilgo, Provincia De La Rioja, 18 (3-4), pp. 139-153. , Revista de la Asociación Geológica Argentina
  • Fisher, N.D., Jordan, T.E., Brown, L., The structural and stratigraphic evolution of the La Rioja basin, Argentina (2002) Journal of South American Earth Sciences, 15 (1), pp. 141-156
  • Gilbert, H., Beck, S., Zandt, G., Lithospheric and upper mantle structure of central Chile and Argentina (2006) Geophysical Journal International, 165, pp. 383-398
  • González Bonorino, F., (1950) Algunos Problemas Geológicos De Las Sierras Pampeanas, 5 (3), pp. 81-110. , Revista de la Asociación Geológica Argentina
  • González Bonorino, F., (1953) Los Supuestos Depósitos De Caolín En La Falda Occidental Del Cordón Ambato (Catamarca), 7 (3), pp. 157-189. , Revista de la Asociación Geológica Argentina
  • Gutiérrez, A.A., (1999) Tectonic Geomorphology of the Ambato Block (Northwestern Pampeanas Mountain Ranges, Argentina), pp. 307-310. , 4° Andean Geodynamic Symposium, Expanded Abstracts, Göttingen
  • Gutiérrez, A.A., Mon, R., (2008) Macroindica-dores Cinemáticos En El Bloque Ambato, Provincias De Tucumán Y Catamarca, 63 (1), pp. 24-28. , Revista de la Asociación Geológica Argentina
  • Gutscher, M.A., Andean subduction styles and their effect on thermal structure and interpolate coupling (2002) Journal of South American Earth Sciences, 15 (1), pp. 3-10
  • Gutscher, M., Spakman, W., Bijwaard, H., Enghdal, R., Geodynamics of flat subduction: Seismicity and tomographic constraints from the Andean margin (2000) Tectonics, 19, pp. 814-833
  • Guzmán, C., Cristallini, E., Contemporary stress orientations from bore-hole break out analysis in the southernmost flat-slab boundary Andean retroarc (32o44' and 33o40'S) (2009) Journal of Geophysical Research, p. 114. , B02 406, doi: 10.1029/2007Jb005505
  • Guzmán, C., Cristallini, E., Bottesi, G., Contemporary stress orientations in the Andean retroarc between 34oS and 39oS from bore hole break out analysis (2007) Tectonics, p. 26. , TC3016, doi:10.1029/2006TC001958
  • Handy, M.R., Brun, J.P., Seismicity, structure and strength of the continental lithosphere (2004) Earth and Planetary Science Letters, 223 (3-4), pp. 427-441
  • Heidbach, O., Tingay, M., Barth, A., Reinecker, J., Kurfeß, D., Müller, B., (2008) The World Stress Map Database Release, , doi:10. 1594/GFZ.WSM.Rel2008
  • Höckenreiner, M., Söllner, F., Miller, H., Dating the TIPA shear zone: An Early Devonian terrane boundary between the Famatinian and Pampean systems (NW Argentina) (2003) Journal of South American Earth Sciences, 16, pp. 45-66
  • Holdsworth, R.E., Strachan, R.A., Alsop, G.I., Grant, C.J., Wilson, R.W., Thrust sequences and the significance of low-angle, out-of-sequence faults in the north- ernmost Moine Nappe and Moine Thrust Zone. NW Scotland (2006) Journal of the Geological Society, 163 (5), pp. 801-814
  • Introcaso, A., Lion, A., Ramos, V.A., (1987) La Estructura Profunda De Las Sierras De Córdoba, 42 (1-2), pp. 177-187. , Revista de la Asociación Geológica Argentina
  • (2010) Listado De Terremotos Históricos, , www.inpres.gov.ar, INPRES, Catalogo on-line
  • Jordan, T.E., Allmendinger, R.W., The Sierras Pampeanas of Argentina: A modern analogue of Rocky Mountain foreland deformation (1986) American Journal of Science, 286, pp. 737-764
  • Jordan, T., Isacks, B., Ramos, V.A., Allmendinger, R.W., Mountain building model: The Central Andes (1983) Episodes, 1983 (3), pp. 20-26
  • Jordan, T., Isacks, B., Allmendinger, R., Brewer, J., Ando, C., Ramos, V.A., Andean tectonics related to geometry of subducted plates (1983) Geological Society America, Bulletin, 94 (3), pp. 341-361
  • Jordan, T., Zeitler, P., Ramos, V.A., Gleadow, A.J.W., Thermochronometric data on the development of the basement peneplain in the Sierras Pampeanas, Argentina (1989) Journal of South American Earth Sciences, 2 (3), pp. 207-222
  • Kadinsky-Cade, K., (1985) Seismotectonic of the Chilean Margin and The 1977 Caucete Earthquake of Western Argentina, p. 253. , Tesis doctoral, Cornell university, (inédito), Ithaca
  • Kay, S., Mpodozis, C., Ramos, V., Munizaga, F., Magma source variations for mid-late Tertiary magmatic rocks associated with a shallowing subduction zone and a thickening crust in the central Andes (28to 33S) (1991) Andean Magmatism and Its Tectonic Setting, 265, pp. 113-137. , En Harmon, R.S. y Rapela, C.W. (eds.), Geological Society of America, Special Paper
  • Kendrick, E., Bevis, M., Smalley Jr., R., Brooks, B.A., Barriga, R., Lauría, E., Souto, L.P., The Nazca-South America Euler vector and its rate of change (2003) Journal of South American Earth Sciences, 16, pp. 125-131
  • King, G.C.P., Stein, R.S., Lin, J., Static stress changes and the triggering of earthquakes (1994) Bulletin Seismological Society of Amerrica, 84, pp. 935-953
  • Kirby, S.H., Rock mechanics observations pertinent to the rheology of the continental lithosphere and the localization of strain along shear zones (1985) Tectonophysics, 18, pp. 1-27
  • Lange, D., Cembrano, J., Rietbrok, A., Haberland, C., Dahm, T., Bataille, K., First seismic record for intra-arc strike-slip tectonics along the Liquiñe-Ofqui fault zone at the obliquely convergent plate margin of the southern Andes (2008) Tectonophysics, 455 (1-4), pp. 14-24
  • Langer, C.J., Hartzell, S., Rupture distribution of the 1977 western Argentina earthquake (1996) Physics of the Earth and Planetary Interiors, 94, pp. 121-132
  • Lithgow-Bertelloni, C., Guynn, J.H., Origin of the Lithospheric stress field (2004) Journal of Geophysical Research, p. 109. , B01408, doi: 10.1029/2003Jb002467
  • López, J.P., Durand, F.R., Toselli, A.J., (1996) Zonas De Cizalla En El Flanco Noroccidental De La Sierra De Velasco, La Rioja, Argentina, 2, pp. 179-186. , 13o Congreso Geológico Argentino y 3o Congreso de Exploración de Hidrocarburos, Actas, buenos Aires
  • Massabie, A., Limarino, C., Page, S., (1998) Estructura Y Actividad Neotectónica En Los Llanos De La Rioja, Sierras Pampeanas Noroccidentales, Argentina, 2, pp. 11-16. , 10o Congreso Latinoamericano, Actas, buenos Aires
  • McCaffrey, R., The tectonic framework of the Sumatran subduction zone (2009) Annual Review of Earth and Planetary Sciences, 37, pp. 345-366
  • Mon, R., (1999) Normal Faulting and Major Rock Slides In the North Pampean Ranges of Argentina), pp. 512-515. , 4° Andean Geodynamic Symposium, Extended Abstracts, Göttingen
  • Nábělek, J., (1984) Determination of Earthquake Source Parameters From Inversion of Body Waves, p. 24. , Tesis doctoral, Massachusetts Institute of Technology, (Inédita), Cambridge, Massachusetts
  • Narr, W., Suppe, J., Kinematics of basement- involved compressive structures (1994) American Journal of Science, 294, pp. 802-860
  • Nullo, F.E., (1984) Estructura Del Extremo Austral De La Sierra De Ancasti, Catamarca, 2, pp. 414-426. , 9° Congreso Geológico Argentino, Actas, S.C. bariloche
  • Pardo, M., Comte, D., Monfret, T., Seismotectonic and stress distribution in the central Chile subduction zone (2002) Journal of South American Earth Sciences, 15 (1), pp. 11-22
  • Perarnau, M., Alvarado, P., Saez, M., (2010) Estimación De La Estructura Cortical De Velocidades Sísmicas En El Suroeste De La Sierra De Pie De Palo, Provincia De San Juan (Argentina), 67 (4), pp. 473-480. , Revista de la Asociación Geológica Argentina
  • Ramos, V.A., Tectonics of the Late Proterozoic - Early Paleozoic: A collisional history of Southern South America (1988) Episodes, 11 (3), pp. 168-174
  • Ramos, V.A., Plate tectonic setting of the Andean Cordillera (1999) Episodes, 22 (3), pp. 183-190
  • Ramos, V.A., Cuyania, an exotic block to Gondwana: Review of a historical success and the present problems (2004) Gondwana Research, 7 (4), pp. 1009-1026
  • Ramos, V.A., Cristallini, E.O., Pérez, D.J., The Pampean flat-slab of the central Andes (2002) Journal of South American Earth Sciences, 15, pp. 59-78
  • Rossello, E.A., le Corre, C., Los bloques basculados de las sierras de Ambato y Ancasti (Catamarca, Argentina): Responden a un modelo neógeno de fallamiento lístrico distensivo o compresivo? (1989) Primera Reunión De Fallas Activas Del Noroeste Argentino, Actas, p. 4. , San Juan
  • Sanchez, G., Rolland, Y., Schreiber, D., Giannerini, G., Corsini, M., Lardeaux, J.M., Active fault system of SW Alps (2010) Journal of Geodynamics, 49 (5), pp. 296-302
  • Smalley Jr., R., Pujol, J., Regnier, M., Chiu, J.M., Chatelain, J.L., Isacks, B.L., Araujo, M., Puebla, N., Basement seismicity beneath the Andean Precordillera thin-skinned thrust belt and implications for crustal and lithospheric behavior (1993) Tectonics, 12, pp. 63-76
  • Snyder, D.B., Ramos, V.A., Allmendinger, R.W., Thick-skinned deformation observed on deep seismic reflection profiles in Western Argentina (1990) Tectonics, 9 (4), pp. 773-788
  • Toselli, A.J., Rossi, J., Aceñolaza, F., (1985) Milonitas De Bajo Grado De La Megafractura De Sierras Pampeanas En La Quebrada De La Rioja, Sierra De Velasco, Argentina, 1 (2), pp. 160-163. , 4o Congreso Geológico Chileno, Actas, Antofagasta
  • Toselli, A.J., Aceñolaza, F.G., Bossi, J.N., (2005) Esquema Geológico De La Sierra De Velasco, Argentina, 1, pp. 129-132. , 16° Congreso Geológico Argentino, Actas, La Plata
  • Triep, E.G., Source mechanism of San Juan Province earthquake, 1977. International Institute of Seismology and Earthquake Engineering (Japan) (1979) Individual Studies, 15, pp. 1-14
  • Vigny, C., Rudloff, A., Ruegg, J.C., Madariaga, R., Campos, J., Alvarez, M., Upper plate deformation measured by GPS in the Coquimbo gap, Chile (2009) Physics of the Earth and Planetary Interiors, 175 (1-2), pp. 86-95
  • (2010) The World Stress Map Project - a Service For Earth System Management, , http://dc-app3-14.gfz-potsdam.de/, World Stress Map-Project, German Research Centre for Geosciences- GFZ Helmholtz Centre Potsdam
  • Zapata, T.R., Crustal structure of the Andean thrust front at 30°S latitude from shallow and deep seismic reflection profiles, Argentina (1998) Journal of South American Earth Sciences, 11, pp. 131-151

Citas:

---------- APA ----------
Alvarado, P. & Ramos, V.A. (2010) . The Andean structure of the Sierras Pampeanas based on earthquake focal mechanisms in their Northwestern region . Revista de la Asociacion Geologica Argentina, 67(4), 461-472.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p461_Alvarado [ ]
---------- CHICAGO ----------
Alvarado, P., Ramos, V.A. "The Andean structure of the Sierras Pampeanas based on earthquake focal mechanisms in their Northwestern region " . Revista de la Asociacion Geologica Argentina 67, no. 4 (2010) : 461-472.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p461_Alvarado [ ]
---------- MLA ----------
Alvarado, P., Ramos, V.A. "The Andean structure of the Sierras Pampeanas based on earthquake focal mechanisms in their Northwestern region " . Revista de la Asociacion Geologica Argentina, vol. 67, no. 4, 2010, pp. 461-472.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p461_Alvarado [ ]
---------- VANCOUVER ----------
Alvarado, P., Ramos, V.A. The Andean structure of the Sierras Pampeanas based on earthquake focal mechanisms in their Northwestern region . Rev. Asoc. Geol. Argent. 2010;67(4):461-472.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p461_Alvarado [ ]