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Haberland et al. 2003
Haberland, C., Rietbrock, A., Schurr, B. and Brasse, H. (2003). Coincident anomalies of seismic attenuation and electrical resistivity beneath the southern Bolivian Altiplano plateau. Geophysical Research Letters 30: doi: 10.1029/2003GL017492. issn: 0094-8276.

Reassessment of local earthquake data from the ANCORP seismological network allowed the calculation of 3D attenuation (Qp) tomographic images of crust and upper mantle beneath the southern Bolivian Altiplano around 21¿ S. The images reveal a low-Qp middle and lower crust and a moderate-Qp upper mantle beneath the southern Altiplano. Beneath the recent magmatic arc, Qp is not significantly decreased at this latitude. The distribution of crustal Qp coincides with the variation of electrical resistivity, thus limiting the possible mechanisms causing the anomalies. Our findings support the hypothesis that partial melts in middle and lower crust beneath the Altiplano are present on a large scale. We see no evidence for a shallow asthenosphere beneath the southern Altiplano.

BACKGROUND DATA FILES

Abstract

Keywords
Physical Properties of Rocks, Magnetic and electrical properties, Physical Properties of Rocks, Wave attenuation, Seismology, Lithosphere and upper mantle, Tectonophysics, Earth's interior--composition and state, Information Related to Geographic Region, South America
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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