INVESTIGADORES
OSELLA Ana Maria
artículos
Título:
Electrical and Thermal Anomalies in the Central Andean Subduction zone
Autor/es:
FAVETTO, A.; OSELLA, A.,; MARTINELLI, PATRICIA
Revista:
PURE AND APPLIED GEOPHYSICS
Editorial:
BIRKHAUSER VERLAG AG
Referencias:
Lugar: BASEL; Año: 1997 vol. 141 p. 139 - 156
ISSN:
0033-4553
Resumen:
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.