Internal structure of Tenerife (Canary Islands) based on gravity, aeromagnetic and volcanological data

Araña, Vicente; Camacho, A. G.; García, Alicia García; Montesinos, Fuensanta G.; Polo-Blanco, Irene; Vieira, Ricardo; Felpeto, A.

doi:10.1016/s0377-0273(00)00215-8

Cited by 82 publications

(59 citation statements)

References 51 publications

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“…The strong N-S asymmetry has also been highlighted in seismic velocity (Watts et al, 1997) and aeromagnetic data (Araña et al, 2000;García et al 2007). It has been suggested by both Araña et al (2000) and Ablay and Kearey (2000), that these anomalies are due to low density, partly chaotic and unconsolidated volcanic rocks (mainly mafic and phonolitic lavas), erupted from the PV-PT complex over its lifetime from 179 ka onwards. These deposits represent the major infill of the Icod valley.…”

Section: B the Core Of The Cvcmentioning

confidence: 74%

“…The geological and tectonic evolution of the triangular island of Tenerife and the CVC was described in recent papers (Martí et al, 1994;Martí et al, 1998;Araña et al, 2000) and we therefore only provide a short summary. The Canary Islands form a volcanic archipelago with a long-standing history of volcanic activity that began more than 40 million years ago (Araña and Ortíz, 1991).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…2 shows the location of the new gravity/GPS benchmarks which provide coverage of the LCC, the PV-PT complex and the Santiago Rift. An additional 361 gravity data (from a total set of 975 covering the entire island) obtained earlier are used for investigating the wider area surrounding the CVC (Camacho et al, 1991, Araña et al, 2000. These earlier gravity readings are reported with an uncertainty of 1.2 mGal.…”

Section: Gravity Data A) New Gravity Surveymentioning

confidence: 99%

“…It has been speculated that earthquake locations and density changes during the reactivation may be controlled by the internal structure of the CVC (Martí et al, 2008a). However, the available geophysical information on its subsurface architecture is mainly based on rather crude surveys highlighting large wavelength anomalies such as from aero-magnetic data (Araña et al, 2000;García et al, 2007) or gravimetric data with substantial uncertainties (Araña et al, 2000). A detailed assessment of structural controls on the spatio-temporal variations in geophysical parameters during the recent reactivation thus remains ambiguous.…”

Section: Introductionmentioning

confidence: 99%

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

Gottsmann

Camacho²,

Martı́

et al. 2008

Physics of the Earth and Planetary Interiors

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Section: B the Core Of The Cvcmentioning

confidence: 74%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Gravity Data A) New Gravity Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Gottsmann

Camacho²,

Martı́

et al. 2008

Physics of the Earth and Planetary Interiors

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“…Tenerife is the largest of the seven Canary Islands in the Canary Archipelago with the surface area of 2034 km 2 . The island is clearly divided to a very dry southern part and a very humid and vegetated north.…”

Section: Introductionmentioning

confidence: 99%

Surface deformation studies of Tenerife Island, Spain from joint GPS-DInSAR observations

Samsonov

Tiampo

González³

et al. 2008

2008 Second Workshop on Use of Remote Sensing Techniques for Monitoring Volcanoes and Seismogenic Areas

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Abstract-This work presents results for the three-dimensional displacement field at Tenerife Island calculated from campaign GPS and ascending and descending ENVISAT DInSAR interferograms. The goal of this work is to provide an example of the flexibility of the technique by fusing together new varieties of geodetic data, and to observe surface deformations and study precursors of potential activity in volcanic regions. Interferometric processing of ENVISAT data was performed with GAMMA software. All possible combinations were used to create interferograms and then stacking was used to increase signal-to-noise ratio. Decorrelated areas were widely observed, particularly for interferograms with large perpendicular baseline and large time span. Tropospheric signal was also observed which significantly complicated the interpretation. Subsidence signal was observed in the NW part of the island and around Mount Teide and agreed in some regions with campaign GPS data. It is expected that the technique will provide better results when more high quality DInSAR and GPS data is available.

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Interpreting subsurface volcanic structures using geologically constrained 3‐D gravity inversions: Examples of maar‐diatremes, Newer Volcanics Province, southeastern Australia

et al. 2014

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We present results and a method to geophysically image the subsurface structures of maar volcanoes to better understand eruption mechanisms and risks associated with maar-forming eruptions. High-resolution ground gravity and magnetic data were acquired across several maar volcanoes within the Newer Volcanics Province of southeastern Australia, including the Ecklin maar, Red Rock Volcanic Complex, and Mount Leura Volcanic Complex. The depth and geometry of subsurface volcanic structures were determined by interpretation of gridded geophysical data and constrained 2.5-D forward and 3-D inverse modeling techniques. Bouguer gravity lows identified across the volcanic craters reflect lower density lake sediments and pyroclastic debris infilling the underlying maar-diatremes. These anomalies were reproduced during modeling by shallow coalesced diatremes. Short-wavelength positive gravity and magnetic anomalies identified within the center of the craters suggest complex internal structures. Modeling identified feeder vents, consisting of higher proportions of volcanic debris, intrusive dikes, and ponded magma. Because potential field models are nonunique, sensitivity analyses were undertaken to understand where uncertainty lies in the interpretations, and how the models may vary between the bounds of the constraints. Rather than producing a single "ideal" model, multiple models consistent with available geologic information are created using different inversion techniques. The modeling technique we present focuses on maar volcanoes, but there are wider implications for imaging the subsurface of other volcanic systems such as kimberlite pipes, scoria cones, tuff rings, and calderas.

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Internal structure of Tenerife (Canary Islands) based on gravity, aeromagnetic and volcanological data

Cited by 82 publications

References 51 publications

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

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

Surface deformation studies of Tenerife Island, Spain from joint GPS-DInSAR observations

Interpreting subsurface volcanic structures using geologically constrained 3‐D gravity inversions: Examples of maar‐diatremes, Newer Volcanics Province, southeastern Australia

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