A seismic study of lithospheric flexure in the vicinity of Tenerife, Canary Islands

Watts, A. B.; Peirce, C.; Collier, Jenny; Dalwood, R.; Canales, J. P.; Henstock, T.

doi:10.1016/s0012-821x(96)00249-x

Cited by 145 publications

(135 citation statements)

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“…2.6 mm/yr for Hawai'i) for the duration of volcanic growth (Brotchie and Silvester, 1969;Walcott, 1970;Watts and ten Brink, 1989;Ludwig et al, 1991;Lipman, 1995;Watts, 2001). Subsidence associated with flexural loading is greatly dependent on several factors, chiefly the rheological parameters of the lithosphere (such as the elastic thickness), the viscosity of underlying mantle, and parameters that control the proportion of the magma that rises to the surface versus the amount of magma that gets stalled at different levels within the lithosphere (see Brotchie and Silvester, 1969;Watts and ten Brink, 1989;Watts et al, 1997;Watts, 2001;Minshull and Charvis, 2001;Ali et al, 2003). Rheological parameters greatly depend on plate age/thickness and the amount of thermal rejuvenation exerted by hotspots, with older and thicker, colder plates stiffer than young ones (Watts, 2001).…”

Section: Uplift Vs Subsidencementioning

confidence: 99%

“…The role of intrusions in modifying plate flexure is well known (e.g. Watts and ten Brink, 1989;Watts et al, 1997;Ali et al, 2003) but extremely dependent on where these intrusions occur, i.e. if they act as subsurface loads (when they occur at the base of the rigid plate), if they are neutral (if they occur within the rigid plate), or act as surface loads (if they occur within the island edifice) (Ramalho et al, 2010a;Ramalho, 2011).…”

Section: Uplift Vs Subsidencementioning

confidence: 99%

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Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Ramalho¹,

Quartau

Trenhaile

et al. 2013

Earth-Science Reviews

153

147

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The growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially characterized by rapid but intermittent lateral growth through the formation of lava deltas, largely expanding the coastlines until they, typically, reach their maximum extension. With the post-shield quiescence in volcanic activity, destructive processes gradually take over and coastlines retreat, adopting a more prominent profile; mass wasting and marine and fluvial erosion reshape the landscape and, if conditions are favorable, biogenic processes assume a prominent role. Posterosional volcanic activity may temporarily reverse the balance by renewing coastline expansion, but islands inexorably enter in a long battle for survival above sea level. Reef growth and/or uplift may also prolong the island's lifetime above the waves. The ultimate fate of most islands, however, is to be drowned through subsidence and/or truncation by marine erosion.Keywords complex, interplay, between, volcanism, erosion, sedimentation, sea, level, islands, change, coastal, biogenic, production, oceanic, evolution, volcanic, GeoQuest Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsRamalho, R. S., Quartau, R., Trenhaile, A. S., Mitchell, N. C., Woodroffe, C. D. & Avila, S. P. (2013). Coastal evolution on volcanic oceanic islands: a complex interplay between volcanism, erosion, sedimentation, sealevel change and biogenic production. Earth-Science Reviews, 127 140-170. AbstractThe growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially ch...

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Section: Uplift Vs Subsidencementioning

confidence: 99%

Section: Uplift Vs Subsidencementioning

confidence: 99%

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Ramalho¹,

Quartau

Trenhaile

et al. 2013

Earth-Science Reviews

153

147

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“…Subsequently, Watts et al (1997) again worked on the same compilation of free-air gravity anomalies, also using seismic reflection data to compare the observed data with gravimetric ones calculated using a 2-D model of Tenerife Island. They present a twodimensional interpretive model of the flanks of Tenerife and adjacent crust.…”

Section: Ranero Et Al (1995) Obtained a Free Air Anomaly Map For Varmentioning

confidence: 99%

“…Apart from the previously described short-term surface deformation, characterized by a broad subsidence pattern with maximum ground velocities of about 4 mm/yr detected via spacebased geodetic observations (Fernández et al, 2009), different geophysical researchs (Watts, 1994;Watts et al, 1997;Watts and Zhong, 2000;Collier and Watts, 2001;Minshull and Charvis, 2001) A more recent GPS and SBAS-DInSAR data combination was performed for Tenerife…”

Section: Measurement Of Deformation and Gravity Changesmentioning

confidence: 99%

An Overview of Geodetic Volcano Research in the Canary Islands

Fernández

González

Camacho

et al. 2014

Pure Appl. Geophys.

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“…This nucleus is thought to be an ultramafic cumulitic complex, formed during the building of the SVC, see Figure 1. In response to the load of Tenerife and of the neighboring islands of La Gomera to the West and Gran Canaria to the Southeast, the lithosphere under Tenerife has been flexed downward by about 3500 m [Watts et al, 1997;Collier and Watts, 2001], bringing the total thickness of the volcanic pile above the oceanic crust to about 10500 m.…”

Section: Introductionmentioning

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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A seismic study of lithospheric flexure in the vicinity of Tenerife, Canary Islands

Cited by 145 publications

References 43 publications

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

An Overview of Geodetic Volcano Research in the Canary Islands

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

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