Navegar

Colección

Datos Estadísticas

Artículo

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

Abstract:

An enhancement of the electrical conductivity in the upper layers in the subduction zones of southern Peru and northern Argentina is found by analyzing the solar quiet geomagnetic variations. This feature appears in a zone associated with large subduction angles. In this region high values of heat flow have been measured, therefore a one-dimensional thermal model is proposed using regional characteristic parameters to reproduce these values. It is found that thermal convection necessarily plays a contributing role. This effect may be produced by the ascending magma and fluids, which can explain the enhancement of the electrical conductivity.

Registro:

Documento: Artículo
Título:Electrical and thermal anomalies in the central andean subduction zone
Autor:Favetto, A.; Martinelli, P.; Osella, A.
Filiación:Dep. de Fis.-Fac. Cs. Exactas, Universidad de Buenos Aires, Ciudad Universitaria, Pab 1, 1428 Buenos Aires, Argentina
CONICET, Argentina
Palabras clave:Central Andes; Electrical anomaly; Thermal anomaly; electrical conductivity; heat flow; subduction zone; thermal anomaly; South America, Andes
Año:1997
Volumen:149
Número:2
Página de inicio:391
Página de fin:404
DOI: http://dx.doi.org/10.1007/s000240050032
Título revista:Pure and Applied Geophysics
Título revista abreviado:Pure Appl. Geophys.
ISSN:00334553
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00334553_v149_n2_p391_Favetto

Referencias:

  • Allmendinger, R., Figueroa, D., Snyder, E., Beer, J., Mpodozis, C., Isacks, B.L., Foreland Shortening and Crustal Balancing in the Andes at 30° Latitude (1990) Tectonics, 9, pp. 789-809
  • Assumpçao, M., The Regional Intraplate Stress Field in South America (1992) J. Geophys. Res., 97, pp. 11889-11903
  • Barazangi, M., Isacks, B., Spatial Distribution of Earthquakes and Subduction of the Nazca Plate beneath South America (1976) Geology, 4, pp. 686-692
  • Cahill, T., Isacks, B., Seismicity and Shape of the Subducted Nazca Plate (1992) J. Geophys. Res., 97, pp. 17503-17529
  • Campbell, W., Schiffmacher, E., Upper Mantle Electrical Conductivity for Seven Subcontinental Regions of the Earth (1988) J. Geomag. Geoelectr., 40, pp. 1387-1406
  • Chapman, D.S., Pollack, H.N., Regional Geotherms and Lithospheric Thickness (1977) Geology, 5, pp. 265-268
  • Dorbath, C., Garnet, M., Poupinet, G., Martinez, C., A Teleseimic Study of the Altiplano and Eastern Cordillera in Northern Bolivia: New Constraints on a Lithopheric Model (1993) J. Geophys. Res., 98, pp. 9825-9844
  • Fukao, Y., Yamamoto, A., Kono, M., Gravity Anomaly across the Peruvian Andes (1989) J. Geophys. Res., 94, pp. 3867-3890
  • Giese, P., Geothermal structure of the Central Andean crust - Implications for heat transport and rheology (1993) Tectonics of the Southern Central Andes, pp. 69-76. , (eds. Reutter, K. J., Scheuber, E., and Wigger, P. J.) Springer-Verlag, New York
  • Henry, S.G., Pollack, H.N., Terrestrial Heat Flow above the Andean Subduction Zone in Bolivia and Peru (1988) J. Geophys. Res., 93, pp. 15153-15162
  • James, D.E., Andean Crustal and Upper Mantle Structure (1971) J. Geophys. Res., 76, pp. 3246-3271
  • James, D.E., Snoke, J.A., Structure and Tectonics in the Region of the Flat Subduction beneath Central Peru: Crust and Uppermost Mantle (1994) J. Geophys. Res., 99, pp. 6899-6912
  • Jordan, T.E., Isacks, B.L., Allmendinger, R.W., Brewer, J.A., Ramos, V.A., Ando, C.L., Andean Tectonics Related to Geometry of Subducted Nazca Plate (1983) Geol. Soc. Am. Bull., 94, pp. 341-361
  • Norabuena, E.O., Snoke, A., James, D., Structure of the Subducting Nazca Plate beneath Peru (1994) J. Geophys Res, 99, pp. 9215-9226
  • Osella, A.M., Favetto, A., Martinelli, P., Lateral Heterogeneities in the Upper and Mid-mantle Conductivity in Argentina (1993) Pure and Appl. Geophys., 141, pp. 139-156
  • Osella, A.M., Favetto, A., Martinelli, P., Sensitivity of the Geomagnetic Daily Variations to 2D Structures (1993) Trends in Geophys. Res., 2, pp. 141-155
  • Peacock, S.M., Thermal Effect of Metamorphic Fluids in Subduction Zones (1987) Geology, 15, pp. 1057-1060
  • Schmitz, M., A Balanced Model of the Southern Central Andes (1994) Tectonics, 13 (2), pp. 485-492
  • Schmucker, U., Hartmann, O., Giesecke, A.A., Casaverde, M., Forbush, S.E., Electrical Conductivity in the Earth's Crust in Peru (1963) Carnegie Institution of Washington Yearbook, 63, pp. 354-362
  • Sheffels, B., Lower Bound on the Amount of Crustal Shortening in the Central Bolivian Andes (1990) Geology, 18, pp. 812-815
  • Smalley, R., Pujol, J., Regnier, M., Chiu, J.M., Chatelain, B.L., Araujo, M., Puebla, N., Basement Seismicity beneath the Andean Precordillera Thin-skinned Thrust Belt and its Implications for Crustal and Lithosphere Behavior (1993) Tectonics, 12, pp. 63-76
  • Tarits, P., Menvielle, M., The Andean Conductivity Anomaly Reexamined (1986) Annales Geophysicae, 4 B, pp. 63-70
  • Whitman, D., Moho Geometry beneath the Eastern Margin of the Andes, Northwest Argentina, and its Implications to the Effective Elastic Thickness of the Andean Foreland (1994) J. Geophys. Res., 99, pp. 15277-15289
  • Wigger, P., Schmitz, M., Araneda, M., Asch, G., Baldzhun, S., Giese, P., Heinsohn, W.D., Viramonte, J., Variation of the crustal structure of the southern Central Andes deduced from seismic refraction investigations (1993) Tectonics of the Southern Central Andes, pp. 23-48. , (eds. Reutter, K. J., Scheuber, E., and Wigger, P. J.) Springer-Verlag, New York

Citas:

---------- APA ----------
Favetto, A., Martinelli, P. & Osella, A. (1997) . Electrical and thermal anomalies in the central andean subduction zone. Pure and Applied Geophysics, 149(2), 391-404.
http://dx.doi.org/10.1007/s000240050032
---------- CHICAGO ----------
Favetto, A., Martinelli, P., Osella, A. "Electrical and thermal anomalies in the central andean subduction zone" . Pure and Applied Geophysics 149, no. 2 (1997) : 391-404.
http://dx.doi.org/10.1007/s000240050032
---------- MLA ----------
Favetto, A., Martinelli, P., Osella, A. "Electrical and thermal anomalies in the central andean subduction zone" . Pure and Applied Geophysics, vol. 149, no. 2, 1997, pp. 391-404.
http://dx.doi.org/10.1007/s000240050032
---------- VANCOUVER ----------
Favetto, A., Martinelli, P., Osella, A. Electrical and thermal anomalies in the central andean subduction zone. Pure Appl. Geophys. 1997;149(2):391-404.
http://dx.doi.org/10.1007/s000240050032