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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1552

Authors: Garcìa, A.*
Blanco, I.*
Torta, J. M.*
Socías, I.*
Title: High-resolution aeromagnetic survey of the Teide volcano (Canary Islands): a preliminary analysis
Issue Date: Mar-1997
Series/Report no.: 40/2
URI: http://hdl.handle.net/2122/1552
Keywords: Teide
Aeromagnetic anomalies
topographic correction
Abstract: To contribute to our understanding of the structure of the Teide volcano, a detailed aeromagnetic survey was carried out covering the area of Las Cañadas caldera and the Teide-Pico Viejo complex. Taking into account the rugged relief of the area (altitude ranges from sea level to almost 4000 m), a terrain correction has been applied. As a first approximation, the topography has been characterized by a uniform magnetization of 5 Am-1 (based on field and laboratory rock magnetic data). Several enhancement techniques have been applied to the residual map (original map minus topographic effect), such as reduction to the pole, pseudogravity integration and upward continuation. In the reduced-to-the-pole map the large positive anomaly that appears centered to the north of Pico Viejo is noteworthy and could be caused by a basaltic intrusion responsible for the last eruptions in this area. Also, a small magnetic low appears over Teide peak, which should be related to slightly-magnetized shallow phonolitic materials. The main tectonic direction of Tenerife, SW-NE, is also clearly reflected on the magnetic anomaly map. The comparison between the pseudogravity and the Bouguer anomaly maps indicates a good correlation between magnetic and gravimetric sources.
Appears in Collections:04.08.06. Volcano monitoring
04.02.04. Magnetic and electrical methods
Annals of Geophysics

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