Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/35984
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Evidence for hydrothermal venting and sediment volcanism discharged after recent short-lived volcanic eruptions at Deception Island, Bransfield Strait, Antarctica |
Autor: | Somoza, Luis CSIC ORCID ; Martínez-Frías, J. ; Smellie, J. L.; Rey, Jorge; Maestro González, Adolfo | Palabras clave: | Hydrothermal vents Submarine volcanoes Geophysical surveys Geochemical investigations Antarctica |
Fecha de publicación: | 15-ene-2004 | Editor: | Elsevier | Citación: | Marine Geology 20381-2): 119-140 (2004) | Resumen: | The results of a combined geophysical and geochemical research programme on Deception Island, an active volcano at 62°43′S, 60°57′W in Bransfield Strait (Antarctica), are presented. Ultrahigh-resolution acoustic data obtained with a TOPAS (TOpographic PArameter Sonar) system and multibeam bathymetry (Simrad EM1000) allow a detailed analysis of submarine vents in Port Foster, the submerged caldera of Deception Island. The data show three different types of seafloor structures: low-relief mounds, high-relief mounds (‘wasp nest’-like) and spire-like structures. We interpret these structures as products of sediment volcanism and seeps caused by heating and boiling of pore fluids in gas-charged sediments, and related to recent short-lived volcanic events, possibly those that occurred in 1967, 1969 and 1970. In addition, subsurface vertical disturbed zones, formed by increased amplitude and phase-inverse reflectors beneath the mounds, suggest the presence of fluidised and brecciated sediments within hydrofracture systems. A key finding of this study is that there appears to be a close relationship between the submarine mounds detected by our ultrahigh-resolution seismic study, geochemical haloes, fault-pathways and present-day thermal anomalies in surface waters. We suggest that seafloor hydrofracture systems and subsurface pipes can be re-used as fluid migration pathways, resulting in hydrothermal seeps and vents on the seafloor, possibly up to decades after coeval volcanic eruptions. | Descripción: | 22 páginas, 9 figuras, 3 tablas. | Versión del editor: | http://dx.doi.org/10.1016/S0025-3227(03)00285-8 | URI: | http://hdl.handle.net/10261/35984 | DOI: | 10.1016/S0025-3227(03)00285-8 | ISSN: | 0025-3227 |
Aparece en las colecciones: | (CAB) Artículos (IGME) Artículos |
Mostrar el registro completo
CORE Recommender
SCOPUSTM
Citations
51
checked on 15-mar-2024
WEB OF SCIENCETM
Citations
43
checked on 29-feb-2024
Page view(s)
354
checked on 19-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.