Origin and evolution of the Deception Island caldera (South Shetland Islands, Antarctica)

Martı́, Joan; Geyer, Adelina; Aguirre‐Díaz, Gerardo J.

doi:10.1007/s00445-013-0732-3

Cited by 52 publications

(73 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Martí et al (2013) on the basis of new stratigraphy and petrological studies, with the revision of previous results, proposed a model of the formation and internal structure of the Island. In reference to the present internal structure, the authors show that a polygonal structural network consisting of several preexisting major normal faults controlled pre-and post-caldera volcanism on the island.…”

Section: Deep Geothermal Effectmentioning

confidence: 98%

“…On the basis of these observations, there are mainly at the present two possible models that are coincident in the interpretation of the shallower structure (0-2 km) and they are in disagreement with the interpretation of the deeper structure. In one of them, the effects of fractured rocks and the existence of a geothermal system that hydrothermally altered the medium are detected up to 6 km depth (Martí et al 2013). In the other, the observed anomalies are interpreted as the effects of the presence of a certain amount of melted rock/material with variable volume (e.g., Ben-Zvi et al 2009;Pedrera et al 2012;Muñoz Martín et al 2005).…”

Section: Deception Island: Volcanological and Geophysical Modelsmentioning

confidence: 98%

“…1) is considered as a laboratory for Volcano Geophysics due to the large number of multidisciplinary studies focused both on imaging its surface and deep structures and on monitoring its volcanic activity. Scientists have widely studied the origin and morphology of Deception Island, bringing forward general and local models (e.g., Martí et al 1996Martí et al , 2013Smellie et al 2002;Fernández-Ibáñez et al 2005;Maestro et al 2007; Barclay et al 2009;Melo et al 2012;Torrecillas et al 2012Torrecillas et al , 2013. The study of the seismic activity of the volcano is probably the most active and productive research line, as reported by Tejedo et al (2014).…”

Section: Introductionmentioning

confidence: 97%

“…Additionally, geochemical analysis of the composition and ratio of stable isotopes and gases produced by fumaroles (Caselli et al 2004(Caselli et al , 2007Kusakabe et al 2009) are also very well known and provide important information on the presence and origin of magma and fluids. Nowadays, with these observables, the research community is working to provide a geodynamic and volcanological model that could unify all of them in a single interpretation, such as those made by Smellie (2001), Martí et al (2013), Berrocoso et al (2012) and Pedrera et al (2012).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The 3D Attenuation Structure of Deception Island (Antarctica)

et al. 2015

View full text Add to dashboard Cite

The seismic and volcanological structure of Deception Island (Antarctica) is an intense focus topic in Volcano Geophysics. The interpretations given by scientists on the origin, nature, and location of the structures buried under the island strongly diverge. We present a high-resolution 3D P-wave attenuation tomography model obtained by using the coda normalization method on 20,293 high-quality waveforms produced by active sources. The checkerboard and synthetic anomaly tests guarantee the reproduction of the input anomalies under the island down to a depth of 4 km. The results, once compared with our current knowledge on the geological, geochemical, and geophysical structure of the region, depict Deception as a piecemeal caldera structure coming out of the Bransfield Trough. Highattenuation anomalies contouring the northeastern emerged caldera rim correlate with the locations of sediments. In our interpretation, the main attenuation contrast, which appears under the collapsed southeastern caldera rim, is related to the deeper feeding systems. A unique P-wave high-attenuation spherical-like anomaly in the inner bay extends between depths of 1 and 3 km. The northern contour of the anomaly coincides with the calderic rim both at 1 and 2 km, while smaller anomalies connect it with deeper structures below 3 km, dipping toward the Bransfield Trough. In our interpretation, the large upper anomaly is caused by a high-temperature shallow (1-3 km deep) geothermal system, located beneath the sediment-filled bay in the collapsed blocks and heated by smaller, deeper contributions of molten materials (magma) rising from southeast.

show abstract

Section: Deep Geothermal Effectmentioning

confidence: 98%

Section: Deception Island: Volcanological and Geophysical Modelsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The 3D Attenuation Structure of Deception Island (Antarctica)

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Based on the results obtained in this paper, we have tentatively mapped inside the DI caldera-according to the historical volcanism and following the structural limits proposed by Martí et al (2013)-the possible type of hydrovolcanic activity to be expected during a future volcanic eruption at DI to depend on the outcoming vent location. This qualitative map divided DI into five areas (A-E) depending on the potential type and style of hydrovolcanic activity to be expected during a future eruption, as based on observed historical eruptions and our analyses ( Fig.…”

Section: Aq19mentioning

confidence: 89%

Historic hydrovolcanism at Deception Island (Antarctica): implications for eruption hazards

et al. 2017

Self Cite

View full text Add to dashboard Cite

Deception Island (Antarctica) is the southernmost island of the South Shetland Archipelago in the South Atlantic. Volcanic activity since the eighteenth century, along with the latest volcanic unrest episodes in the twentieth and twenty first centuries, demonstrates that the volcanic system is still active and that future eruptions are likely. Despite its remote location, the South Shetland Islands are an important touristic destination during the austral summer. In addition, they host several research stations and three summer field camps. Deception Island is characterised by a Quaternary caldera system with a post caldera succession and is considered to be part of an active, dispersed (monogenetic), volcanic field. Historical post caldera volcanism on Deception Island involves monogenetic small volume (VEI 2-3) eruptions such forming cones and various types of hydrovolcanic edifices. The scientific stations on the island were destroyed, or severely damaged, during the eruptions in 1967, 1969, and 1970 mainly due to explosive activity triggered by the interaction of rising (or erupting) magma with surface water, shallow groundwater, and ice. We conducted a detailed revision (field petrology and geochemistry) of the historical hydrovolcanic post caldera eruptions of Deception Island with the aim to understand the dynamics of magma water interaction, as well as characterise the most likely eruptive scenarios from future eruptions. We specifically focused on the Crimson Hill (estimated age between 1825 and 1829), and Kroner Lake (estimated age between 1829 and 1912) eruptions and 1967, 1969, and 1970 events by describing the eruption mechanisms related to the island's hydrovolcanic activity. Data suggest that the main hazards posed by volcanism on the island are due to fallout, ballistic blocks and bombs, and subordinate, dilute PDCs. In addition, Deception Island can be divided into five areas of expected activity due to magma water interaction, providing additional data for correct hazard assessment on the island.

show abstract

Formation of a spatter-rich pyroclastic density current deposit in a Neogene sequence of trachytic-mafic igneous rocks at Mason Spur, Erebus volcanic province, Antarctica

et al. 2017

View full text Add to dashboard Cite

Erosion has revealed a remarkable section through the heart of a volcanic island, Mason Spur, in the southwestern Ross Sea, Antarctica, including an unusually well exposed section of caldera fill. The near-continuous exposure, 10 km laterally and >1 km vertically, cuts through Cenozoic alkalic volcanic rocks of the Erebus volcanic province (McMurdo Volcanic Group) and permits the study of an ancient volcanic succession that is rarely available due to subsequent burial or erosion. The caldera filling sequence includes an unusual trachytic spatter-rich lapilli tuff (ignimbrite) facies that is particularly striking because of the presence of abundant black fluidal, dense juvenile spatter clasts of trachytic obsidian up to 2m long supported in a pale cream-coloured pumiceous lapilli tuff matrix. Field mapping indicates that the deposit is an ignimbrite and, together with petrological considerations, it is suggested that mixing of dense spatter and pumiceous lapilli tuff in the investigated deposit occurred during emplacement, not necessarily in the same vent, with the mixed fragmental material emplaced as a pyroclastic density current. Liquid water was not initially present but a steam phase was probably generated during transport and may represent water ingested during passage of the current as it passed over either wet ground (possibly puddled), a stream, shallow lake or possibly snow. Well exposed caldera interiors are uncommon and that at Mason Spur is helping understand eruption dynamics associated with a complex large island volcano. The results of our study should help to elucidate interpretations of other, less well exposed pyroclastic density current deposits elsewhere in Antarctica and globally.

show abstract

Origin and evolution of the Deception Island caldera (South Shetland Islands, Antarctica)

Cited by 52 publications

References 42 publications

The 3D Attenuation Structure of Deception Island (Antarctica)

The 3D Attenuation Structure of Deception Island (Antarctica)

Historic hydrovolcanism at Deception Island (Antarctica): implications for eruption hazards

Formation of a spatter-rich pyroclastic density current deposit in a Neogene sequence of trachytic-mafic igneous rocks at Mason Spur, Erebus volcanic province, Antarctica

Contact Info

Product

Resources

About