Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte la política de Acceso Abierto del editor

Abstract:

Multichannel seismic reflection profiles, gravity measurements, and bathymetric soundings, in conjunction with field geological reconnaissance and remote sensing images, reveal with unprecedented detail the morphostructure of a major segment of the South America-Scotia plate boundary in the Tierra del Fuego region. This segment, known as the Magallanes-Fagnano fault system, is a continental transform margin arranged in an en echelon geometry, along which prominent asymmetric basins were developed. Data acquired off the Atlantic coast of Isla Grande (the main island of Tierra del Fuego), in its central and eastern part, and in the central and western Magallanes Strait image the surface and subsurface structure of the transform fault and its associated basins. The Magallanes-Fagnano fault system is composed of distinct tectonic lineaments that are segments of the transform system and are represented by mostly near-vertical faults. In the Atlantic sector, the fault system trends broadly N70°E and seems to be composed by a single master fault, along which a highly asymmetric basin has formed. At around 63°W, the fault terminates by splaying into secondary normal faults that dissipate the horizontal displacement along the system. In the central eastern part of Isla Grande, the fault segments have been principally identified from analyses of remote sensing images on the basis of their morphological expression. These segments are located within river valleys and are generally associated with localized gravity minima. Lago Fagnano, a 105-km-long, E-W trending depression, is a large, mostly asymmetric pull-apart basin developed within the principal displacement zone of the Magallanes-Fagnano fault system. Restraining bends and overlapping step-over geometry characterize the central part of the Magallanes Strait. Along the western part of the fault system, in the vicinity of the Pacific entrance of the Magallanes Strait, asymmetric sedimentary basins have also developed. The sedimentary architecture of the basins formed within the principal displacement zone of the fault, in which the thick end of the depositional wedge abuts the transform segment, suggest simultaneous strike-slip motion and transform-normal extension, a common feature found in other continental transtensional environments. Strike-slip faulting in the Tierra del Fuego region is also documented along other prominent lineaments which parallel the Magallanes-Fagnano fault system. Along at least two of these lineaments, characterized by a remarkable morphological expression, widespread Quaternary activity occurs. The present-day motion between the South America and Scotia plates is slow (<5 mm/yr). Also the modern seismicity monitored in the Tierra del Fuego region is low (individual events <3.5 in magnitude). The low seismicity may be explained by the slow relative motion between plates and may be further affected by slip partitioning along the different segments which make up the Magallanes-Fagnano fault array, and along the subsidiary wrench lineaments that traverse the region. Copyright 2003 by the American Geophysical Union.

Registro:

Documento: Artículo
Título:Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America)
Autor:Lodolo, E.; Menichetti, M.; Bartole, R.; Ben-Avraham, Z.; Tassone, A.; Lippai, H.
Filiación:Istituto Nazionale di (OGS), Borgo Grota Gigante 42/C, Trieste I-34010, Italy
Ist. di Geodinamica e Sedimentologia, University of Urbino, Urbino I-61029, Italy
Dipto. Sci. Geologiche Ambientali, University of Trieste, Trieste I-34127, Italy
Department of Geophys/Planetary Sci., Tel Aviv University, Tel Aviv 69978, Israel
Departamento de Geologia, Inst. Geofisica Daniel Valencio, University of Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Geophysical data; Magallanes-Fagnano fault system; Remote sensing images; Strike-slip tectonics; Tierra del Fuego region; continental margin; morphostructure; plate boundary; plate motion; seismicity; tectonophysics; transform fault; South America; Tierra del Fuego [(ARC) South America]
Año:2003
Volumen:22
Número:6
Página de inicio:15
Página de fin:1 - 15-26
Título revista:Tectonics
Título revista abreviado:Tectonics
ISSN:02787407
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v22_n6_p15_Lodolo

Referencias:

  • Alvarez-Marrón, J., McClay, K.R., Harambour, S., Rojas, L., Skarmeta, J., Geometry and evolution of the frontal part of the Magallanes foreland thrust and fold belt (Vicun̄a area), Tierra del Fuego, southern Chile (1993) AAPG Bull., 11, pp. 1904-1921
  • Aydin, A., Nur, A., The types and role of stepovers in strike-slip tectonics (1985) Strike-Slip Deformation, Basin Formation and Sedimentation, 37, pp. 35-44. , edited by K. T. Biddle and N. Christie-Blick, Spec. Publ. Soc. Econ. Paleontol. Mineral
  • Barker, P.F., Burrell, J., The opening of Drake Passage (1977) Mar Geol., 25, pp. 15-34
  • Bartole, R., Colizza, E., De Muro, S., Colautti, W., The Pacific entrance of the Magellan Strait: Preliminary results of a seismic and sampling survey (2000) Terra Antarct. Rep., 4, pp. 81-94
  • Ben-Avraham, Z., Structural framework of the Gulf of Elat (Aqaba) Northern Red Sea (1985) J. Geophys. Res., 90, pp. 703-726
  • Ben-Avraham, Z., Development of asymmetric basins along continental transform faults (1992) Tectonophysics, 215, pp. 209-220
  • Ben-Avraham, Z., Zoback, M.D., Transform-normal extension and asymmetric basins: An alternative to pull-apart models (1992) Geology, 20, pp. 423-426
  • Ben-Avraham, Z., Almagor, G., Garfunkel, Z., Sediments and structure of the Gulf of Elat (Aqaba) Northern Red Sea (1979) Sediment. Geol., 23, pp. 239-267
  • Biddle, K.T., Uliana, M.A., Mitchum, R.M., Fitzgerald, M.G., Wright, R.C., The stratigraphic and structural evolution of the central and eastern Magallanes Basin, southern South America (1986) Spec. Publ. Int. Assoc. Sediment., 8, pp. 41-61
  • Bujalesky, G.G., Heusse, C., Coronato, A.M., Roig, C.E., Rabassa, J.O., Pleistocene glaciolacustrine sedimentation at Lago Fagnano, Andes of Tierra del Fuego, southernmost South America (1997) Quat. Sci. Rev., 16, pp. 767-778
  • Caminos, R., Hall, M.A., Lapido, O., Lizuain, A., Page, R., Ramos, V., Reconocimiento geologico de los Andes Fueguinos, territorio Nacional de Tierra del Fuego (1981) IIX Cong. Geol. Argentino, 3, pp. 759-786. , Buenos Aires, Actas
  • Cunningham, A.P., Barker, P.F., Tomlinson, J.S., Tectonics and sedimentary environment of the North Scotia Ridge revealed by side-scan sonar (1998) J. Geol. Soc. London, 155, pp. 941-956
  • Cunningham, W.D., Strike-slip faults in the southernmost Andes and the development of the Patagonian orocline (1993) Tectonics, 12, pp. 169-186
  • Cunningham, W.D., Dalziel, I.W.D., Lee, T.-Y., Lawver, L.A., Southernmost South America Antarctic Peninsula relative plate motions since 84 Ma: Implications for the tectonic evolution of the Scotia Arc region (1995) J. Geophys. Res., 100, pp. 8257-8266
  • Dalziel, I.W.D., Pre-Jurassic history of the Scotia Arc region (1982) Antarctic Geoscience, pp. 111-126. , edited by C. Craddock Univ. of Wis. Press, Madison
  • Dalziel, I.W.D., (1989) Tectonics of the Scotia Arc, Antarctica, Field Trip Guideb., T180, p. 206. , AGU, Washington, D.C
  • Dalziel, I.W.D., Brown, R.L., Tectonic denudation of the Darwin metamorphic core complex in the Andes of Tierra del Fuego, southernmost Chile: Implications for Cordilleran orogenesis (1989) Geology, 17, pp. 699-703
  • Dalziel, I.W.D., de Wit, M.J., Palmer, K.F., Fossil marginal basin in the southern Andes (1974) Nature, 250, pp. 291-294
  • Darwin, C., Geological observations on South America (1846) London
  • Davey, F.J., Gravity measurements over Burdwood Bank (1972) Mar. Geophys. Res., 1, pp. 428-435
  • Del Cogliano, D., Perdomo, R., Hormaechea, J.-L., Desplazamiento entre placas tectónicas en Tierra del Fuego (2000) Actas de la XX Reunión Cientifica de la Asociación Argentina De Geofisicos Y Geodestas, pp. 231-234. , Asoc. Argent. de Geofis. y Geod., Simposio Gravimetría y Geodesia, Mendoza
  • Eyal, Y., Eyal, M., Bartov, Y., Steinitz, G., Folkman, Y., The origin of the Bir Zreir rbomb-shaped graben, eastern Sinai (1986) Tectonics, 5, pp. 267-277
  • Faugere, E., Brun, J.-P., Van den Driessche, J., Asymmetric basins in pure extension and in wrenching: Experimental models (1986) Bull. Cent. Rech. Elf Explor. Prod., 10, pp. 13-21
  • Febrer, J.M., Plasencia, M.P., Sabbione, N.C., Local and regional seismicity from Ushuaia Broadband Station Observations (Tierra del Fuego) (2000) Terra Antarctica, 8, pp. 35-40
  • Forsyth, R., Fault plane solutions and tectonics of the South Atlantic and Scotia Sea (1975) J. Geophys. Res., 80, pp. 1429-1443
  • Freund, R., Kinematics of transform and transcurrent faults (1971) Tectonics, 21, pp. 93-134
  • Fuenzalida, R.H., (1972) Geological Correlation Between the Patagonian Andes and the Antarctic Peninsula and Some Tectonic Implications, , Master's thesis, 75 pp., Stanford Univ., Stanford, Calif
  • Fuenzalida, R.H., The Magellan fault zone (1976) Symposium on Andean and Antarctic Volcanology Problems, , Int. Assoc. of Volcanol. and Chem. of the Earth's Inter., Naples, Italy
  • Galeazzi, J.S., Structural and stratigraphic evolution of the Western Malvinas Basin, Argentina (1998) AAPG Bull., 82, pp. 596-636
  • Ghiglione, M., Diques clásticos asociados a deformación transcurrente en depósitos sinorogénicos del Mioceno inferior de la Cuenca Austral (2002) Rev. Asoc. Geol. Argent., 57, pp. 103-118
  • Grunov, A.M., Dalziel, I.W.D., Harrison, T.M., Heizler, M.T., Structural geology and geochronology of subduction complexes along the margin of Gondwanaland: New data from the Antarctic Peninsula and southernmost Andes (1992) Geol. Soc. Am. Bull., 104, pp. 1497-1514
  • Hervé, F., Suarez, M., Puig, A., The Patagonian Batholith south of Tierra del Fuego: Timing and tectonic implications (1984) J. Geol. Soc. London, 141, pp. 909-917
  • Jaeger, J.C., Cook, N.G.W., (1969) Fundamentals of Rock Mechanics, , Methuen, New York
  • Klepeis, K.A., The Magallanes and Deseado fault zones: Major segments of the South American Scotia transform plate boundary in southernmost South America, Tierra del Fuego (1994) J. Geophys. Res., 99, pp. 22001-22014
  • Klepeis, K.A., Austin Jr., J.A., Contrasting styles of superposed deformation in the southernmost Andes (1997) Tectonics, 16, pp. 755-776
  • Lodolo, E., Menichetti, M., Tassone, A., Geletti, R., Sterzat, P., Lippai, H., Hormaechea, H.-L., Researchers target a continental transform fault in Tierra del Fuego (2002) Eos Trans. AGU, 83, pp. 5-61
  • Lodolo, E., Menichetti, M., Tassone, A., Sterzai, P., Morphostructure of the central-eastern Tierra del Fuego Island from geological data unit remote sensing images (2002) EGS Stephan Mueller Spec. Publ. Ser., 2, pp. 1-16
  • Lomnitz, C., Major earthquakes and tsunamis in Chile during the period 1535 to 1955 (1970) Geol. Rundsch., 59, pp. 938-960
  • Ludwig, W.J., Rabinowitz, P.D., The collision complex of the North Scotia Ridge (1982) J. Geophys. Res., 87, pp. 3731-3740
  • Morelli, C., Gantar, C., Honkasalo, T., McConnell, R.K., Tanner, I.G., Szabo, B., Uotila, U., Whalen, C.T., The international gravity standardization net 1971 (1974) I. U. G. G. Int. Assoc. Geod. Spec. Publ., 4, p. 194
  • Olivero, E.B., Malumian, N., Eocene stratigraphy of southeastern Tierra del Fuego Island, Argentina (1999) AAPG Bull., 83, pp. 295-313
  • Pelayo, A.M., Wiens, D.A., Seismotectonics and relative plate motions in the Scotia Arc region (1989) J. Geophys. Res., 94, pp. 7293-7320
  • Platt, N.H., Philip, P.R., Structure of the southern Falkland Islands continental shelf: Initial results from new seismic data (1995) Mar. Pet. Geol., 12, pp. 759-771
  • Ramos, V.A., Andean foothills structures in Northern Magallanes Basin (1989) AAPG Bull., 73, pp. 887-903
  • Rosendahl, B.R., Architecture of continental rifts with special reference to East Africa (1987) Annu. Rev. Earth Planet. Sci., 15, pp. 445-503
  • Sandwell, D.T., Antarctic marine gravity field from high-density satellite altimetry (1992) Geophys. J. Int., 109, pp. 437-448
  • Sandwell, D.T., Yale, M.M., Smith, W.H.F., Gravity anomaly profiles from ERS-1, Topex and Geosat altimetry (abstract) (1995) Eos Trans. AGU, 76 (17), pp. S89. , Spring Meet. Suppl
  • Sylvester, A.G., Strike-slip faults (1988) Geol. Soc. Am. Bull., 100, pp. 1666-1703
  • Vuan, A., Cazzaro, R., Costa, G., Russi, M., Panza, G.F., S-wave velocity models in the Scotia Sea region, Antarctica, from non-linear inversion of Rayleigh waves dispersion (1999) Pure Appl. Geophys., 154, pp. 121-139
  • Wiens, D.A., Vera, E., Helffrich, G., Seismic experiment in Patagonia and Antarctica (SEPA) (1998) IRIS Newsl., 17, pp. 9-11
  • Winslow, M.A., The structural evolution of the Magallanes Basin and neotectonics in the southernmost Andes (1982) Antarctic Geoscience, pp. 143-154. , edited by C. Craddock Univ. of Wis. Press, Madison
  • Woodcock, N.H., The role of strike-slip fault systems at plate boundaries (1986) Philos. Trans R. Soc. London, 317, pp. 13-29. , Ser. A

Citas:

---------- APA ----------
Lodolo, E., Menichetti, M., Bartole, R., Ben-Avraham, Z., Tassone, A. & Lippai, H. (2003) . Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America). Tectonics, 22(6), 15-1 - 15-26.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v22_n6_p15_Lodolo [ ]
---------- CHICAGO ----------
Lodolo, E., Menichetti, M., Bartole, R., Ben-Avraham, Z., Tassone, A., Lippai, H. "Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America)" . Tectonics 22, no. 6 (2003) : 15-1 - 15-26.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v22_n6_p15_Lodolo [ ]
---------- MLA ----------
Lodolo, E., Menichetti, M., Bartole, R., Ben-Avraham, Z., Tassone, A., Lippai, H. "Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America)" . Tectonics, vol. 22, no. 6, 2003, pp. 15-1 - 15-26.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v22_n6_p15_Lodolo [ ]
---------- VANCOUVER ----------
Lodolo, E., Menichetti, M., Bartole, R., Ben-Avraham, Z., Tassone, A., Lippai, H. Magallanes-Fagnano continental transform fault (Tierra del Fuego, southernmost South America). Tectonics. 2003;22(6):15-1 - 15-26.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02787407_v22_n6_p15_Lodolo [ ]