Shallow structure beneath the Central Volcanic Complex of Tenerife from new gravity data: Implications for its evolution and recent reactivation

Gottsmann, Joachim; Camacho, A. G.; Martı́, Joan; Wooller, Luke; Fernández, José; García, Alicia García; Rymer, Hazel

doi:10.1016/j.pepi.2008.06.020

Cited by 94 publications

(110 citation statements)

References 56 publications

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“…We consider a homogeneous half-space Earth model and a point source with a mass equal to the intrusive complex mass retrieved by Gottsmann et al [2008] (see Figure 3e and auxiliary material), located at different depths (8, 10, 12 and 14 km) to account for the depth loaded by the mass. To simulate viscoelastic displacements after initial loading, we decrease the shear modulus value of four orders of magnitude only for the part of the medium below the depth loaded by the intrusive mass.…”

Section: Discussionmentioning

confidence: 99%

Gravity‐driven deformation of Tenerife measured by InSAR time series analysis

Fernández¹,

Tizzani²,

Manzo³

et al. 2009

Geophysical Research Letters

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We study the state of deformation of Tenerife (Canary Islands) using Differential Synthetic Aperture Radar Interferometry (DInSAR). We apply the Small BAseline Subset (SBAS) DInSAR algorithm to radar images acquired from 1992 to 2005 by the ERS sensors to determine the deformation rate distribution and the time series for the coherent pixels identified in the island. Our analysis reveals that the summit area of the volcanic edifice is characterized by a rather continuous subsidence extending well beyond Las Cañadas caldera rim and corresponding to the dense core of the island. These results, coupled with GPS ones, structural and geological information and deformation modeling, suggest an interpretation based on the gravitational sinking of the dense core of the island into a weak lithosphere and that the volcanic edifice is in a state of compression. We also detect more localized deformation patterns correlated with water table changes and variations in the deformation time series associated with the seismic crisis in 2004.

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Section: Discussionmentioning

confidence: 99%

Gravity‐driven deformation of Tenerife measured by InSAR time series analysis

Fernández¹,

Tizzani²,

Manzo³

et al. 2009

Geophysical Research Letters

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“…This has forced the use and development of new techniques for the improvement and optimization of geodetic monitoring, in both observational and theoretical (interpretation tools) aspects, as well as for the knowledge of the crustal structure of the different Islands. The last is a basic aspect for a correct discussion and interpretation of any observed anomaly during unrest episodes (see e.g., Gottsmann et al, 2008).…”

Section: Recent Studiesmentioning

confidence: 99%

“…In the 21st century, several gravimetric works (sometimes complemented with microseismic experiments) have sought to better define gravity anomalies and show structural details on different islands such as Lanzarote (Camacho et al, 2001;Gorbatikov et al, 2004), -García et al, 2007;Gottsmann et al, 2008;Camacho et al, 2011a, b), Fuerteventura (Montesinos et al, 2005), La Palma (Camacho et al, 2009), El Hierro (Montesinos et al, 2006;Gorbatikov et al, 2013), and La Gomera (Montesinos et al, 2011. ), and in the vicinity of the Canary Islands (Llanes, 2006).…”

Section: Structural Studiesmentioning

confidence: 99%

“…The areas of most recent volcanic activity (and therefore potentially more active) are characterized by negative gravity anomalies, which are partly due to fracturing and slight accumulation of unconsolidated volcanic material which still being not eroded. Some of these works allow different authors to relate the determined crustal structures with displacement or other anomalies detected during the recent volcanic crisis in the archipelago (Gottsmann et al, 2008;Gorbatikov et al, 2013. ).…”

Section: Structural Studiesmentioning

confidence: 99%

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An Overview of Geodetic Volcano Research in the Canary Islands

Fernández

González

Camacho

et al. 2014

Pure Appl. Geophys.

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“…Seismicity, gases and ground deformation are usually monitored around active and restless volcanoes (Sparks 2003). Gravity anomaly studies (Gottsmann et al 2008;Coco et al 2016) and acoustic waves (Ferrazzini and Aki 1987) also provide insight into subsurface processes. Measurements of water chemistry composition from hydrothermal manifestation such as boiling pools, crater lakes and thermal springs are also routinely conducted (Varekamp et al 2001(Varekamp et al , 2009Federico et al 2002;Tassi et al 2003).…”

Section: Hydrothermal Systems and Unrestmentioning

confidence: 99%

Groundwater flow and volcanic unrest

Jasim

Hemmings

Mayer

et al. 2018

Advances in Volcanology

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Hydrology around active volcanoes is strongly controlled by the interaction between groundwater, and the fluids, dissolved elements and heat associated with magmatic intrusion. The chemical and mechanical processes associated with magmatic unrest can result in observable changes in the hydrothermal system. Consequently, observations of chemical and physical hydrothermal variations may provide insights into the state of volcanic activity. Additionally, the interaction between hydrological and volcanic systems leads to the presence of high-temperature, pressurised, and often acidic fluids, which add to, and intensify, the volcanic hazard. In the following chapter we present the major components of, and controls on, magmatic hydrothermal systems focusing on the mutual perturbation between the groundwater flow system and the volcanic system. We explore how these conditions can be modified by volcanic unrest and we identify feedbacks between dynamic hydrothermal behaviour and on-going unrest. The interaction between these systems, and therefore the associated monitoring signals, are the result of complex groundwater-volcano coupling within multi-phase flow system in evolving lithologies. Nonetheless, detailed monitoring of hydrothermal and hydrological behaviour can provide insights into unrest and the evolution of hazards at restless volcanoes.

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Shallow structure beneath the Central Volcanic Complex of Tenerife from new gravity data: Implications for its evolution and recent reactivation

Cited by 94 publications

References 56 publications

Gravity‐driven deformation of Tenerife measured by InSAR time series analysis

Gravity‐driven deformation of Tenerife measured by InSAR time series analysis

An Overview of Geodetic Volcano Research in the Canary Islands

Groundwater flow and volcanic unrest

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