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Kinematic model for Tenerife Island (Canary Islands, Spain): Geodynamic interpretation in the Nubian plate context

Abstract:

Establishment of a geodetic network in Tenerife is the starting point for the use of GPS and other precise geodetic techniques in the support of the study of kinematics and their relation with island volcanic activity. This paper is focused on the characterization of volcanotectonic activity of Tenerife, to determine the geodynamic framework for volcanic surveillance.TEGETEIDE network, set up in 2005 and re-observed each year, is composed of seven GNSS-GPS stations scattered throughout the island. A horizontal deformation model is presented in order to explain the observed island displacement pattern in the geodynamic context of the Nubian plate.According to the models obtained, the most important geologic structures, such as the volcanic rifts and the caldera, determine the current deformation pattern of Tenerife. The geodynamics of the most stable areas of the island behave similarly to that observed from the permanent GNSS-GPS reference stations located in La Palma and Gran Canaria Islands.Anomalous geodynamic behaviour has been detected in two zones of Tenerife, which configure an NW-SE axis crossing the central sector of the island, related with the volcanotectonic activity of the island and its surroundings. © 2010.